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Precambrian Research, 184(1-4), 43-62.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2010.10.002","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15665","geometry":{"type":"Point","coordinates":[133.5376582,-30.3288493]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15665,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083792","IGSN":"10.60494/y944-a276","SAMPLENO":11083792,"SAMPLE_ID":"R8049","AGE_MA":2425,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"2 standard error","AGE_MSWD":null,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"DATA REPROCESSED: Fanning (1997) originally reported a mixed magmatic/metamorphic SHRIMP age of 2453 +/- 8 Ma (SampleID 5637 RS1553) however, this age data has been reprocessed and 2 separate ages recalculated for Fanning et al (2007) publication, which supersedes this single previous age.","AGE_SOURCE":"GSSA/Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Blackfellow Hill Pyroxenite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BLACKFELLOW HILL 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH886306","BOREHOLE_TOP_DEPTH_M":145.55,"BOREHOLE_BASE_DEPTH_M":145.85,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.3288493,"LONG_GDA94":133.5376582,"ELEV_M_AHD":190,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65376; 73609","AGE_REF":"Fanning, C.M., 1997. Geochronological synthesis of southern Australia - Part 1 The Curnamona Province, and Part 2 The Gawler Craton. South Australia. Department of Mines and Energy. Open File Envelope, 8918, 76.; Fanning, C.M., Reid, A.J., Teale, G.S., 2007. A geochronological framework for the Gawler Craton, South Australia. 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The sample is a biotite–muscovite–K‑feldspar– plagioclase–quartz gneiss with mm- to cm‑scale leucocratic–melanocratic layering defined by variable biotite content. The leucocratic segregations in the sampled migmatitic gneiss are medium-grained K-feldspar–plagioclase–quartz–biotite with up to 10 vol% biotite. Melanosomes are biotite-rich with up to 30 vol% biotite and have diffuse and undulose edges with mm- to cm‑scale fabric parallel muscovite–K-feldspar–plagioclase– quartz–biotite leucosomes. The sample was taken from a leucosome-rich portion of the migmatitic gneiss, containing up to 5–10 cm‑wide leucosomes. The migmatitic gneiss is a previously undescribed unit of the Harts Range Metamorphic Complex, a succession of metasedimentary rocks and subordinate igneous units that were deposited during the Neoproterozoic–Cambrian and metamorphosed during the Larapinta Event (eg Scrimgeour 2013). 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This sample was dated to constrain the protolith to the migmatitic gneiss including its inheritance spectra and maximum deposition or emplacement age.","SAMPLING_FEATURE_NAME":"HU15BLR1222","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS637091","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8961650116,"LONG_GDA94":135.8676353069,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Jinka Station, 3km NE of Ghost Gum Bore, and 220km NE of Alice Springs","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72524","AGE_REF":"Kositcin, N., Reno, B.L., 2020. Summary of results. Joint NTGS-GA geochronology project: Aileron and Irindina provinces, Jinka and Dneiper 1:100 000 mapsheets, 2019. Northern Territory Geological Survey Record, 2020-001, 14p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/89781","AGE_ENTRY_DATE":"2020-02-10","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1703","geometry":{"type":"Point","coordinates":[131.678741,-26.312111]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1703,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3081603","IGSN":"10273/AU3081603","SAMPLENO":3081603,"SAMPLE_ID":"W-118a","AGE_MA":850,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"Biotite; Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"age of shearing","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron with whole-rock and biotite","AGE_SOURCE":"ANU compilation","PROJECT":"ISOTOPE","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"W-118a","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS641324","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":"Mount Woodroffe area - Musgrave Block","STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.312111,"LONG_GDA94":131.678741,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72352","AGE_REF":"Camacho, A., McDougall, I., Armstrong, R., Braun, J., 2001. Evidence for shear heating, Musgrave Block, central Australia. Journal of Structural Geology, 23(6-7), 1007-1013.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0191-8141(00)00172-3","AGE_ENTRY_DATE":"2019-08-30","AGE_LAST_UPDATED":"2026-01-19"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7901","geometry":{"type":"Point","coordinates":[128.04505,-17.46093]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7901,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6661394","IGSN":"10273/AU6661394","SAMPLENO":6661394,"SAMPLE_ID":"95SB11","AGE_MA":1843,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.77,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"metamorphism (peak)","OTHER_AGE_INTERPRETED_FROM_SOURCE":"NA","AGE_REMARK_FROM_SOURCE":"There is only a minor difference between the younger MIX component and the pooled age suggesting that the inclusion of analyses from type C zircon has little effect on the ages of the two components present in the post-1900 Ma data set from metapelite 95SB11. 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Thermal evolution of the central Halls Creek Orogen, northern Australia. Australian Journal of Earth Sciences, 46(3), 453-465.; Bodorkos, S., Cawood, P.A., Oliver, N.H.S., Nemchin, A.A., 2000. Rapidity of orogenesis in the Paleoproterozoic Halls Creek Orogen, northern Australia; evidence from SHRIMP zircon data, CL zircon images, and mixture modeling studies. 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A multi-technique evaluation of hydrothermal hematite Usingle bondPb isotope systematics: Implications for ore deposit geochronology. 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Retrograde muscovite is ubiquitous throughout the sample.","SAMPLING_FEATURE_NAME":"NSWSJAF0096","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS599164","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.7397558596,"LONG_GDA94":141.2574183289,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Main, P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71968","AGE_REF":"Kositcin, N., Fitzherbert, J.A., Main, P.T., Waltenberg, K., 2018. New SHRIMP U-Pb zircon provenance and in situ monazite metamorphic ages from the Mount Robe Sub-block, Broken Hill, New South Wales: July 2015-June 2017. Geoscience Australia. Record, 2018/50, 63p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2018.050","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4221","geometry":{"type":"Point","coordinates":[136.31524582,-22.60668174]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4221,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1597793","IGSN":"10273/AU1597793","SAMPLENO":1597793,"SAMPLE_ID":"2000081217","AGE_MA":435,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":33,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3733","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":"North Australian Craton","STRATNO":80344,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU80344","STRAT_UNIT_NAME":"Casper Suite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected and described by Claoue-Long and Hoatson (2005), who interpreted the unit as a strongly deformed metapsammite from the Bonya Metamorphics. Recent remapping in Jervois Range by NTGS has resulted in the reinterpretation of this unit as an igneous intrusive that intruded the Bonya metasedimentary succession prior to high-grade metamorphism. This reinterpretation is based on petrography and whole rock geochemistry of a fresh sample collected by NTGS from the original SHRIMP sample site that indicate that the outcropping lithology is more clearly of igneous, than sedimentary, origin. The unit outcrops approximately 7 km north of Unka Waterhole in eastern Jervois Range. In outcrop the unit is pale grey when fresh, quartz-rich and massive in appearance. The outcropping lithology is leucocratic and strongly recrystallised with a very fine-grained granoblastic assemblage of quartz–plagioclase–K-feldspar. Biotite and muscovite comprise around 1–2% of the mineral mode and define a strong grain shape foliation. Narrow bands (<1 mm thick) of fine-grained quartz–K-feldspar are oriented parallel to the foliation. These structural fabrics reflect regional S2 deformation that occurred at ca 1755 Ma (Weisheit et al 2016). The orthogneiss is intruded by dykes of fine-grained biotite granite that crosscut the S2 fabric; these may be related to ca 1745 Ma magmatism identified in south-eastern Jervois Range (Reno et al 2015).","SAMPLING_FEATURE_NAME":"2000081217","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS120000","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6066817418,"LONG_GDA94":136.3152458219,"ELEV_M_AHD":341,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Attutra","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.818","geometry":{"type":"Point","coordinates":[141.63447597,-19.22351267]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":818,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2000126","IGSN":"10273/AU2000126","SAMPLENO":2000126,"SAMPLE_ID":"IWSD01","AGE_MA":375.7,"AGE_MA_UNCERTAINTY":3.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6120","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. High-grade metamorphic event (dated rims overgrow c. 382 Ma Igneous cores, and also inherited Proterozoic cores)","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Dg/r-Gt","UNIT_NAME_SOURCE":"Unnamed Biotite Granite (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Collected by Ian Withnall (GSQ) for geochem and Geochronology)","SAMPLING_FEATURE_NAME":"IWSD01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH513417","BOREHOLE_TOP_DEPTH_M":0,"BOREHOLE_BASE_DEPTH_M":0,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.223512674,"LONG_GDA94":141.6344759716,"ELEV_M_AHD":37,"ACCURACY_M":2000,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68146","AGE_REF":"Carson, C.J., Hutton, L.J., Withnall, I.W., Perkins, W.G., Donchak, P.J.T., Parsons, A., Blake, P.R., Sweet, I.P., Neumann, N.L., Lambeck, A., 2011. Joint GSQ-GA NGA geochronology project Mount Isa region, 2009-2010. Queensland Geological Record, 2011/03, 211p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr074997","AGE_ENTRY_DATE":"2013-01-20","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15273","geometry":{"type":"Point","coordinates":[136.364641,-28.5218696]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15273,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034226","IGSN":"10.60494/vvj0-r576","SAMPLENO":11034226,"SAMPLE_ID":"R2509354","AGE_MA":1469,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.12,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"altered pegmatite @ 187.3 m","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous intrusive rock","LITHOLOGY":"pegmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Ttn-ep-chl altered pegmatite. Sample R2509354 is an altered anorthosite pegmatite taken from drillhole BHP CO LTD - BH/WLE 2 at 187.3 m depth. The pegmatite host is dominated by coarse grained plagioclase (up to 1 cm) and is absent of quartz or other feldspars, suggesting the rock is of mafic composition. The pegmatite is altered by epidote, plagioclase, titanite, calcite, chlorite and anatase. Titanite grains vary in size from 0.1 mm to 1 cm and show variable degrees of alteration to anatase and exsolution of ilmenite along cleavage planes. Epidote generally occurs as small grains (<50 um) that form in clusters, or are intergrown with fine-grained plagioclase, chlorite and calcite. These minerals are overprinted by a set of < 50 um wide veinlets calcite or quartz.","SAMPLING_FEATURE_NAME":"BHP CO LTD  - BH/WLE 2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH894473","BOREHOLE_TOP_DEPTH_M":187.3,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.5218696,"LONG_GDA94":136.364641,"ELEV_M_AHD":53,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-14","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15135","geometry":{"type":"Point","coordinates":[137.8472797,-34.492946]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15135,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034295","IGSN":"10.60494/f7b4-p224","SAMPLENO":11034295,"SAMPLE_ID":"EQDD-008A","AGE_MA":1509,"AGE_MA_UNCERTAINTY":6.5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.29,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Note stats taken from Appendix D in the source paper due to some conflicting information in main body of text.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2022: Qz-kfs-bt-sil-pl-ms-hem gneiss. This metapelitic gneiss contains quartz, K-feldspar, biotite, sillimanite, plagioclase, muscovite and hematite. This sample has gneissic layering defined by quartz, K-feldspar and plagioclase that alternate with domains dominated by biotite, muscovite, sillimanite and hematite. Quartz, K-feldspar, plagioclase, biotite and muscovite grains are commonly 0.5-1 mm, patches of sillimanite are up to 2 mm wide, and grains of hematite are between 100 and 500 um.","SAMPLING_FEATURE_NAME":"EQDD-008A ","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938944","BOREHOLE_TOP_DEPTH_M":395.6,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.492946,"LONG_GDA94":137.8472797,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-11-11","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73644","AGE_REF":"Bockmann, M.J., Hand, M., Morrissey, L.J., Payne, J.L., Hasterok, D., Teale, G., Conor, C., 2022. Punctuated geochronology within a sustained high-temperature thermal regime in the southeastern Gawler Craton. Lithos, 430-431, 106860, 18p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2022.106860","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15223","geometry":{"type":"Point","coordinates":[132.23727673,-31.8058464]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15223,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034258","IGSN":"10.60494/3240-8207","SAMPLENO":11034258,"SAMPLE_ID":"2115516","AGE_MA":1590,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":"older population at 1661 +/- 21 Ma (MSWD = 1.3, n = 11)","AGE_REMARK_FROM_SOURCE":"There is a near-continuum of 207Pb/206Pb ages across the range ca 1670-1550 Ma. The older population at ca 1650 Ma could be interpreted as possible peak metamorphism or inheritance.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":28826,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28826","STRAT_UNIT_NAME":"Mulgathing Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"quartzo-feldspathic gneiss, Nundroo Block, Fowler Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid et al 2019: This sample is a quartzo-feldspathic gneiss that contains garnet, sillimanite, biotite, K-feldspar, plagioclase, quartz, hemo-ilmenite with Ti-oxide exsolution lamellae, magnetite, and accessory monazite and zircon. A pervasive foliation is defined by alternating garnet + biotite + sillimanite + opaque-rich and quartzo-feldspathic domains. Garnet porphyroblasts (<2 mm) are typically subidioblastic and inclusion-poor, partly replaced by biotite at some grain boundaries. Monazite dating and phase equilibria modelling was undertaken on this sample, which provides a constraint on the metamorphic evolution of the Nundroo Block. ","SAMPLING_FEATURE_NAME":"Nundroo 2 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595299","BOREHOLE_TOP_DEPTH_M":366.1,"BOREHOLE_BASE_DEPTH_M":366.25,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.805846402,"LONG_GDA94":132.2372767335,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73649","AGE_REF":"Reid, A.J., Halpin, J.A., Dutch, R.A., 2019. Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic. Australian Journal of Earth Sciences, 66(8), 1085-1111.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2019.1602565","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15180","geometry":{"type":"Point","coordinates":[132.23727673,-31.8058464]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15180,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034259","IGSN":"10.60494/kge0-5g55","SAMPLENO":11034259,"SAMPLE_ID":"2115512","AGE_MA":1593,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.12,"NUMBER_OF_ANALYSES":36,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age phase 1","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":28826,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28826","STRAT_UNIT_NAME":"Mulgathing Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"garnet-biotite-bearing quartzo-feldspathic gneiss, Nundroo Block, Fowler Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid et al 2019: This sample is a garnet-biotite-bearing quartzo-feldspathic gneiss that is comprised of garnet, biotite, plagioclase, K-feldspar, quartz, hemo-ilmenite and magnetite, with accessory pyrite, monazite, zircon and apatite. A pervasive foliation is defined by alternating garnet-biotite-rich and quartzo-feldspathic layers, with aligned biotite grains in the former and quartz ribbons in the latter. In altered zones, minor calcite is present. Garnet porphyroblasts are typically subidioblastic (<1mm) and inclusion-poor. Biotite is observed to partly replace garnet at some grain margins. Monazite dating was undertaken on this sample in order to determine the timing of metamorphism; however, like sample 2115492, the peak metamorphic assemblage is not very sensitive to P-T conditions, so no detailed phase equilibria modelling was performed. ","SAMPLING_FEATURE_NAME":"Nundroo 2 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595299","BOREHOLE_TOP_DEPTH_M":312,"BOREHOLE_BASE_DEPTH_M":312.3,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.805846402,"LONG_GDA94":132.2372767335,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73649","AGE_REF":"Reid, A.J., Halpin, J.A., Dutch, R.A., 2019. Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic. Australian Journal of Earth Sciences, 66(8), 1085-1111.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2019.1602565","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15130","geometry":{"type":"Point","coordinates":[133.7325682,-27.1151213]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15130,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034296","IGSN":null,"SAMPLENO":11034296,"SAMPLE_ID":"R1707899","AGE_MA":1735,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.01,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"AR-13","ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Palaeoproterozoic unit 40","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Jagodzinski et al 2013: Sample R1707099 is an altered quartz-plagioclase-muscovite-biotite-sillimanite-hematite schist. Sericite and minor chlorite commonly replaces plagioclase and sillimanite, suggesting a low temperature alteration event has affected these rocks.","SAMPLING_FEATURE_NAME":"GOMA DH2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934789","BOREHOLE_TOP_DEPTH_M":75.4,"BOREHOLE_BASE_DEPTH_M":75.8,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-27.1151213,"LONG_GDA94":133.7325682,"ELEV_M_AHD":346,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2010-01-14","SAMPLE_ORIGINATOR":"Dutch, R.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69203; 76115","AGE_REF":"Jagodzinski, E., Reid, A., 2010. New zircon and monazite geochronology from recent GOMA Drilling. IN: Korsch, R.J., Kositcin, N., Duan, J., Neumann, N.L., Costelloe, R. (eds). Presentations from the 2010 GOMA Seismic and MT Workshop. Geoscience Australia (GA), Part 10, 26.; Jagodzinski, E.A., Reid, A.J., Dutch, R., 2013. Zircon and monazite geochronology via SHRIMP and LA-ICPMS for the northern Gawler Craton, from 2009 GOMA drilling. Geological Survey of South Australia. 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(2023): White mica from a grey equigranular granite that has intense muscovite-quartz-pyrite alteration. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"NTDD003","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH923480","BOREHOLE_TOP_DEPTH_M":124.7,"BOREHOLE_BASE_DEPTH_M":125.35,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.8060779779,"LONG_GDA94":140.0423350731,"ELEV_M_AHD":269,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. 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This sample is a metapelitic gneiss collected for geochronology and mineral equilibria modelling. It contains quartz, K-feldspar, cordierite, sillimanite, biotite, plagioclase, and hematite. The sample preserves cm-scale gneissic layering with sillimanite-biotite-hematite-rich and quartzcordierite-K-feldspar-rich layers. The foliation is defined by sillimanite and biotite (0.2-1 mm), with minor muscovite (up to 300 um). ","SAMPLING_FEATURE_NAME":"RDD004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938954","BOREHOLE_TOP_DEPTH_M":307.4,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.647,"LONG_GDA94":137.8165,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-05-15","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73644","AGE_REF":"Bockmann, M.J., Hand, M., Morrissey, L.J., Payne, J.L., Hasterok, D., Teale, G., Conor, C., 2022. Punctuated geochronology within a sustained high-temperature thermal regime in the southeastern Gawler Craton. Lithos, 430-431, 106860, 18p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2022.106860","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14854","geometry":{"type":"Point","coordinates":[140.2073571,-32.7226665]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14854,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678073","IGSN":"10.60494/8z9p-7j52","SAMPLENO":9678073,"SAMPLE_ID":"AH20WH007","AGE_MA":439.1,"AGE_MA_UNCERTAINTY":12.4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":43,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 8900 series","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal alteration or thermal disturbance","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"initial 87Sr/86Sr ratio = 0.7030 +/- 0.0061","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Anabama Hill diorite dyke","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Hong et al. (2023): Plagioclase-phyric diorite cutting the granodiorite at Anabama Hill prospect. Altered diorite contains fine-grained (10-100 micron) white mica as hydrothermal replacement after plagioclase. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"DDH AN 7","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH868296","BOREHOLE_TOP_DEPTH_M":112.5,"BOREHOLE_BASE_DEPTH_M":112.7,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7226665,"LONG_GDA94":140.2073571,"ELEV_M_AHD":280,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. Metallogenic setting and temporal evolution of porphyry Cu-Mo mineralization and alteration in the Delamerian Orogen, South Australia: Insights from zircon U-Pb, molybdenite Re-Os, and in situ white mica Rb-Sr geochronology. Economic Geology, 118(6), 1291-1318.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.5012","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14803","geometry":{"type":"Point","coordinates":[140.04233507,-32.80607798]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14803,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678092","IGSN":"10.60494/rsvr-9q18","SAMPLENO":9678092,"SAMPLE_ID":"NT21WH067","AGE_MA":435.9,"AGE_MA_UNCERTAINTY":16.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.88,"NUMBER_OF_ANALYSES":45,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 8900 series","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal alteration or thermal disturbance","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"initial 87Sr/86Sr ratio = 0.715 +/- 0.038","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"rock","LITHOLOGY":"breccia","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Hong et al. (2023): White mica from equigranular granite that is cut by K-feldspar-pyrite-chalcopyrite veins. The sample is overprinted by massive white mica-quartz-pyrite +/- magnetite alteration forming granitic clast-supported jigsaw breccia. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"NTDD004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH923481","BOREHOLE_TOP_DEPTH_M":251.6,"BOREHOLE_BASE_DEPTH_M":251.95,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.8060779779,"LONG_GDA94":140.0423350731,"ELEV_M_AHD":269,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. Metallogenic setting and temporal evolution of porphyry Cu-Mo mineralization and alteration in the Delamerian Orogen, South Australia: Insights from zircon U-Pb, molybdenite Re-Os, and in situ white mica Rb-Sr geochronology. Economic Geology, 118(6), 1291-1318.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.5012","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14912","geometry":{"type":"Point","coordinates":[141.86781859,-37.29115198]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14912,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678101","IGSN":"10.60494/21p7-pb38","SAMPLENO":9678101,"SAMPLE_ID":"GC5","AGE_MA":501.4,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Not explicitly interpreted by Ireland et al. (2002): Single analysis with atypically Th/U (~1.7) and low common 206Pb (<1%), possibly recording Delamerian metamorphism. Most other analyses in this prominent cluster around 500 Ma probably represent detrital zircons that have undergone isotopic disturbance during Delamerian-aged metamorphism.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":7400,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU7400","STRAT_UNIT_NAME":"Glenelg River Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Quartzofeldspathic gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Ireland et al. (2002): Grey, homogeneous medium-grained quartzofeldspathic gneiss with a fabric, and minor inclusions of darker material in it. It is a sillimanite-zone metasedimentary gneiss, derived from a quartz-feldspar greywacke. This rock is intruded by pegmatite sheets with little or no foliation.","SAMPLING_FEATURE_NAME":"GC5","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS923492","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2911519848,"LONG_GDA94":141.8678185882,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Yarramyljup Creek, 800 m N of Yarramyljup Road bridge.","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Gibson, G.M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"50065","AGE_REF":"Ireland, T.R., Morand, V.J., Gibson, G.M., 2002. Results of some recent SHRIMP U-Pb zircon dating of rocks from the Glenelg Zone of western Victoria. Geological Survey of Victoria Technical Record, 2002/2, 23p.","AGE_PUBLICATION_LINKS":"http://earthresources.efirst.com.au/product.asp?pID=754&cID=37&c=75443","AGE_ENTRY_DATE":"2024-07-15","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15174","geometry":{"type":"Point","coordinates":[133.7903502,-29.9253323]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15174,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034231","IGSN":"10.60494/2rr4-a821","SAMPLENO":11034231,"SAMPLE_ID":"R1107203","AGE_MA":2458,"AGE_MA_UNCERTAINTY":16,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.22,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"timing of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"2500 +/- 0 = Maximum depositional age","AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"drill chips/cuttings","SAMPLE_DESC":"Reid et al 2007: The main rock types in the Commonwealth Hill anomaly are pyroxene granulite, charnockite, granitic gneiss and garnet gneiss. Metasedimentary material includes garnet gneiss and rare mica schist. Chips from an interval logged as ‘granite’ from drill hole CH 1 were sampled for geochronology and consisted of a composite over 8 m of rock chips. This sample comprised granitic-looking chips interspersed with weathered chips of a yellow to brown colour. These weathered chips were hand-picked out of the mineral separate to ensure no contamination of the final zircon population from possible cover sequences. This is likely to represent cover material sampled as a result of the percussion drilling technique. PIMA analysis of a powdered sample of this material indicated the presence of nontronite and montrolillenite (A. Mauger, pers. comm. 2006), which are typically the result of weathering of ultramafic/mafic rocks.","SAMPLING_FEATURE_NAME":"CH 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH880705","BOREHOLE_TOP_DEPTH_M":80,"BOREHOLE_BASE_DEPTH_M":86,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.9253323,"LONG_GDA94":133.7903502,"ELEV_M_AHD":181,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-08-08","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76125","AGE_REF":"Reid, A., 2007. Commonwealth Hill magnetic anomaly, northwestern Gawler Craton: an interpretation and results of zircon LA-ICPMS U–Pb dating. Geological Survey of South Australia. Report Book, 2007/2, 14p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2019d082680","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15133","geometry":{"type":"Point","coordinates":[137.87051376,-34.53934494]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15133,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034297","IGSN":"10.60494/kqdg-ad13","SAMPLENO":11034297,"SAMPLE_ID":"R1831631","AGE_MA":1601,"AGE_MA_UNCERTAINTY":16,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.3,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"#523","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP IIe","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"fluid flow event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The data show a range of discordance; up to ~30%. This range of discordance is mirrored in the range of the 207Pb/206Pb ages, which vary from a minimum of ~1541 Ma to a maximum of ~1716 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"skarn","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid & Jagodzinski 2011: Sample R1831631 is a skarn-type rock comprising pyroxene-garnet-chlorite-hematite-quartz-K-feldspar-titanite altered rock, presumably having a metavolcanic or volcaniclastic protolith. Similar to sample R1831630, but more strongly chloritised and fractured, which may be reflected in the degree of disturbance of the titanite data.","SAMPLING_FEATURE_NAME":"HDD-016","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938945","BOREHOLE_TOP_DEPTH_M":523,"BOREHOLE_BASE_DEPTH_M":523.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5393449363,"LONG_GDA94":137.8705137559,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76117","AGE_REF":"Gregory, C., Reid, A., Say, P., Teale, G., 2011. Project PGC01-06: U-Pb geochronology of hydrothermal allanite and titanite and magmatic zircon from the Hillside Cu-Au Deposit, Yorke Peninsula. IN: Reid, A.J. and Jagodzinski, E.A. (Eds) 2011. PACE Geochronology: Results of collaborative geochronology projects 2009–10 South Australia. Department of Primary Industries and Resources South Australia. Mineral Exploration Data Package, RB 2011/00003, 95-124.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14791","geometry":{"type":"Point","coordinates":[141.43607641,-37.4503705]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14791,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678102","IGSN":"10.60494/1bx0-9v42","SAMPLENO":9678102,"SAMPLE_ID":"GC8 G608","AGE_MA":484.9,"AGE_MA_UNCERTAINTY":3.4,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Possible metamorphic crystallisation age, interpreted by Ireland et al. (2002). There is no chemical difference between these analyses and the co-interpreted 514.3 +/- 3.3 Ma (1sigma) magmatic zircon population.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Two-component mixture modelling by Ireland et al. (2002) of 17 analyses spanning 520-470 Ma. This younger population = 47% of the total (~8 analyses).","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":7400,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU7400","STRAT_UNIT_NAME":"Glenelg River Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"metamorphic quartz porphyry","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"rhyolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Ireland et al. (2002), Turner et al. (2022): Metamorphosed quartz porphyry, sampled on the Wando River, upstream from its junction with Boundary Creek in the Wando Vale area. This rock is a quartzofeldspathic schist from the garnet zone, originally thought to be an aplite dyke. It is one of a series of quartz porphyry (rhyolite) sills and dykes that continue into low grade rocks where the original porphyritic textures are evident (Wells, 1956). They are tentatively correlated with the Truro Volcanics (Ireland et al., 2002). A sample collected by Wells (1956) from the same dyke contains the S2 schistosity and cuts bedding. It is largely composed of quartz, feldspar and muscovite, with minor biotite, with the foliation defined by aligned muscovite and biotite. Quartz and feldspar phenocrysts are still evident, and large grey-brown apatite grains may be original igneous accessories. Rare poikilitic garnet porphyroblasts have grown during metamorphism.","SAMPLING_FEATURE_NAME":"GC8 G608","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS923493","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.4503704953,"LONG_GDA94":141.4360764054,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Wando River, upstream from junction with Boundary Creek, Wando Vale area.","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Gibson, G.M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"50065","AGE_REF":"Ireland, T.R., Morand, V.J., Gibson, G.M., 2002. Results of some recent SHRIMP U-Pb zircon dating of rocks from the Glenelg Zone of western Victoria. Geological Survey of Victoria Technical Record, 2002/2, 23p.","AGE_PUBLICATION_LINKS":"http://earthresources.efirst.com.au/product.asp?pID=754&cID=37&c=75443","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12696","geometry":{"type":"Point","coordinates":[145.9360385,-41.06948525]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12696,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1471954","IGSN":"10273/AU1471954","SAMPLENO":1471954,"SAMPLE_ID":"R6562TR","AGE_MA":669.7,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"Geological and Nuclear Sciences (GNS) Science, New Zealand","AGE_INTERPRETED_FROM_SOURCE":"not reported","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"K40 abundance = 0.01167%","AGE_SOURCE":"MRT/Original Publication","PROJECT":null,"STRATNO":14603,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14603","STRAT_UNIT_NAME":"Oonah Formation","INFORMAL_UNIT_NAME":"Slate, Burnie Formation, Wivenhoe","UNIT_NAME_SOURCE":"Slate, Burnie Formation, Wivenhoe","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":"bed","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"slate","SAMPLING_FEATURE_NAME":"R6562TR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS136478","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Sheffield Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.0694852502,"LONG_GDA94":145.9360385015,"ELEV_M_AHD":22,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Wivenhoe","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Adams, C.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"39892","AGE_REF":"Adams, C.J., Black, L.P., Corbett, K.D., Green, G.R., 1985. Reconnaissance isotopic studies bearing on the tectonothermal history of Early Palaeozoic and Late Proterozoic sequences in Western Tasmania. Australian Journal of Earth Sciences, 32(1), 7-36.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120098508729309","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12697","geometry":{"type":"Point","coordinates":[145.95992498,-41.06429894]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12697,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1471955","IGSN":"10273/AU1471955","SAMPLENO":1471955,"SAMPLE_ID":"R6563TR","AGE_MA":647.7,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"Geological and Nuclear Sciences (GNS) Science, New Zealand","AGE_INTERPRETED_FROM_SOURCE":"not reported","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"K40 abundance = 0.01167%","AGE_SOURCE":"MRT/Original Publication","PROJECT":null,"STRATNO":14603,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14603","STRAT_UNIT_NAME":"Oonah Formation","INFORMAL_UNIT_NAME":"Slate, Burnie Formation, Round Hill Point","UNIT_NAME_SOURCE":"Slate, Burnie Formation, Round Hill Point","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":"bed","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"slate","SAMPLING_FEATURE_NAME":"R6563TR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS136479","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Sheffield Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.0642989392,"LONG_GDA94":145.9599249814,"ELEV_M_AHD":4,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Round Hill Point","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Adams, C.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"39892","AGE_REF":"Adams, C.J., Black, L.P., Corbett, K.D., Green, G.R., 1985. Reconnaissance isotopic studies bearing on the tectonothermal history of Early Palaeozoic and Late Proterozoic sequences in Western Tasmania. Australian Journal of Earth Sciences, 32(1), 7-36.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120098508729309","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12698","geometry":{"type":"Point","coordinates":[145.95992498,-41.06429894]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12698,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1471956","IGSN":"10273/AU1471956","SAMPLENO":1471956,"SAMPLE_ID":"R6564TR","AGE_MA":671.9,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"Geological and Nuclear Sciences (GNS) Science, New Zealand","AGE_INTERPRETED_FROM_SOURCE":"not reported","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"K40 abundance = 0.01167%","AGE_SOURCE":"MRT/Original Publication","PROJECT":null,"STRATNO":14603,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14603","STRAT_UNIT_NAME":"Oonah Formation","INFORMAL_UNIT_NAME":"Slate, Burnie Formation, Round Hill Point","UNIT_NAME_SOURCE":"Slate, Burnie Formation, Round Hill Point","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":"bed","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"slate","SAMPLING_FEATURE_NAME":"R6564TR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS136480","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Sheffield Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.0642989392,"LONG_GDA94":145.9599249814,"ELEV_M_AHD":4,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Round Hill Point","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Adams, C.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"39892","AGE_REF":"Adams, C.J., Black, L.P., Corbett, K.D., Green, G.R., 1985. Reconnaissance isotopic studies bearing on the tectonothermal history of Early Palaeozoic and Late Proterozoic sequences in Western Tasmania. Australian Journal of Earth Sciences, 32(1), 7-36.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120098508729309","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15678","geometry":{"type":"Point","coordinates":[132.23727673,-31.8058464]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15678,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083784","IGSN":"10.60494/t7r2-k634","SAMPLENO":11083784,"SAMPLE_ID":"R48117","AGE_MA":1547,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.92,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"mafic granulite, Nundroo DDH 2","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"Nundroo 2 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595299","BOREHOLE_TOP_DEPTH_M":128,"BOREHOLE_BASE_DEPTH_M":128.9,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.805846402,"LONG_GDA94":132.2372767335,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65376","AGE_REF":"Fanning, C.M., Reid, A.J., Teale, G.S., 2007. A geochronological framework for the Gawler Craton, South Australia. Geological Survey of South Australia Bulletin, 55, 258p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2018d037833","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15157","geometry":{"type":"Point","coordinates":[137.87051376,-34.53934494]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15157,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034298","IGSN":"10.60494/6evp-vd92","SAMPLENO":11034298,"SAMPLE_ID":"R1831630","AGE_MA":1586,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP IIe","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"fluid flow event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"All analyses (n=15) are from a single large titanite grain.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"skarn","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid & Jagodzinski 2011: Sample R1831630 is a strongly altered, pyroxene-garnet-chlorite-hematite-quartz-K-feldspar skarn-type rock. The large elongate pink coloured zones appear to be altered volcanic feldspar, suggesting the protolith was volcanic in origin. The groundmass is dominated by fine to medium-grained pyroxene (diopside) intergrown with irregular (likely Ca-rich) garnet. Titanite appears as large (>0.2 mm) euhedral crystals that in places are intergrown with hematite/magnetite grains. Since the early magnetite and later overprinting hematite phase is intimately associated with the chalcopyrite and other Cu-bearing sulphides the age of the titanite is likely to indicate the minimum age of the alteration and therefore, the introduction of Cu-Au mineralisation itself. The main difference between this sample from 371 m and sample R1831631 from 523 m [in the same drillhole], is the degree of chloritisation apparent, with the latter being more strongly chloritised and with many more through-going fractures within the sample.","SAMPLING_FEATURE_NAME":"HDD-016","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938945","BOREHOLE_TOP_DEPTH_M":371,"BOREHOLE_BASE_DEPTH_M":371.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5393449363,"LONG_GDA94":137.8705137559,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76117","AGE_REF":"Gregory, C., Reid, A., Say, P., Teale, G., 2011. Project PGC01-06: U-Pb geochronology of hydrothermal allanite and titanite and magmatic zircon from the Hillside Cu-Au Deposit, Yorke Peninsula. IN: Reid, A.J. and Jagodzinski, E.A. (Eds) 2011. PACE Geochronology: Results of collaborative geochronology projects 2009–10 South Australia. Department of Primary Industries and Resources South Australia. Mineral Exploration Data Package, RB 2011/00003, 95-124.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15262","geometry":{"type":"Point","coordinates":[131.4652864,-29.6151034]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15262,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034250","IGSN":"10.60494/pvf5-y453","SAMPLENO":11034250,"SAMPLE_ID":"2159307","AGE_MA":1718,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.73,"NUMBER_OF_ANALYSES":31,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age phase 1","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The significance of this age is uncertain.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":34325,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU34325","STRAT_UNIT_NAME":"Moondrah Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"sample 2159307 Lake Maurice East 1","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample is a quartzo-feldspathic gneiss ","SAMPLING_FEATURE_NAME":"Lake Maurice East 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH12835","BOREHOLE_TOP_DEPTH_M":733.8,"BOREHOLE_BASE_DEPTH_M":735.2,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6151034,"LONG_GDA94":131.4652864,"ELEV_M_AHD":218,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2016-10-13","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73649","AGE_REF":"Reid, A.J., Halpin, J.A., Dutch, R.A., 2019. Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic. Australian Journal of Earth Sciences, 66(8), 1085-1111.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2019.1602565","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15151","geometry":{"type":"Point","coordinates":[137.8165,-34.647]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15151,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034311","IGSN":"10.60494/fnka-5e52","SAMPLENO":11034311,"SAMPLE_ID":"RDD004a","AGE_MA":1505,"AGE_MA_UNCERTAINTY":10.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.95,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Bockmann et al 2022: Qz-kfs-crd-sil-bt-pl-hem-ms gneiss. This sample is a metapelitic gneiss collected for geochronology and mineral equilibria modelling. It contains quartz, K-feldspar, cordierite, sillimanite, biotite, plagioclase, and hematite. The sample preserves cm-scale gneissic layering with sillimanite-biotite-hematite-rich and quartzcordierite-K-feldspar-rich layers. The foliation is defined by sillimanite and biotite (0.2-1 mm), with minor muscovite (up to 300 um). ","SAMPLING_FEATURE_NAME":"RDD004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938954","BOREHOLE_TOP_DEPTH_M":307.4,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.647,"LONG_GDA94":137.8165,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-05-15","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73644","AGE_REF":"Bockmann, M.J., Hand, M., Morrissey, L.J., Payne, J.L., Hasterok, D., Teale, G., Conor, C., 2022. Punctuated geochronology within a sustained high-temperature thermal regime in the southeastern Gawler Craton. Lithos, 430-431, 106860, 18p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2022.106860","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15210","geometry":{"type":"Point","coordinates":[132.2554634,-29.6007933]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15210,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034271","IGSN":"10.60494/w7ka-rk95","SAMPLENO":11034271,"SAMPLE_ID":"2115313","AGE_MA":1542,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.63,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age phase 2","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":28826,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28826","STRAT_UNIT_NAME":"Mulgathing Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"quartzo-feldspathic gneiss, Nawa Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid et al 2019: This sample is a quartzo-feldspathic gneiss that contains a coarse-grained mineral assemblage of garnet, biotite, K-feldspar, plagioclase, quartz, ilmenite and minor sulfides (pyrite, chalcopyrite); accessory phases include monazite and zircon. A moderate foliation is defined by biotite and elongate K-feldspar-rich lenses. Large subidioblastic garnet porphyroblasts (<3mm across) commonly contain biotite, ilmenite and sulfide inclusions and are typically surrounded by coarse biotite. Minor plagioclase and quartz occur in the matrix; plagioclase partly occurs as coronal rims on garnet and biotite. Embayed garnet is partly replaced by biotite and rare chlorite partly replaces biotite. In thin-section, a ~1 cm-wide domain containing additional minor spinel and sillimanite surrounded by plagioclase coronae represents an Al-rich lens. Garnet grains in this domain are smaller (<200 micron). 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K-feldspar contains fine grained inclusions of hematite, sillimanite and biotite (typically between 50 and 200 um) aligned in an early foliation that is overprinted by a later foliation defined by coarser grains of sillimanite and biotite (up to 1 mm) in the matrix.","SAMPLING_FEATURE_NAME":"RDD004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938954","BOREHOLE_TOP_DEPTH_M":316.6,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.647,"LONG_GDA94":137.8165,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73644","AGE_REF":"Bockmann, M.J., Hand, M., Morrissey, L.J., Payne, J.L., Hasterok, D., Teale, G., Conor, C., 2022. 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Lithos, 430-431, 106860, 18p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2022.106860","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14744","geometry":{"type":"Point","coordinates":[140.2073571,-32.7226665]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14744,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678075","IGSN":"10.60494/5m82-jj34","SAMPLENO":9678075,"SAMPLE_ID":"AH20WH024","AGE_MA":443.9,"AGE_MA_UNCERTAINTY":7.5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":46,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 8900 series","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal alteration or thermal disturbance","OTHER_AGE_INTERPRETED_FROM_SOURCE":"sample reanalysed in separate analytical session to confirm accuracy of secondary standard correction to MDC in first session, reanalysis yields age of 451.5 +/- 4.6 Ma (n = 52, MSWD = 0.54, initial 87Sr/86Sr ratio = 0.6991 +/- 0.0145)","AGE_REMARK_FROM_SOURCE":"initial 87Sr/86Sr ratio = 0.6991 +/- 0.0145","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Hong et al. (2023): Coarse-grained muscovite alteration along the contacts of epidote-altered granodiorite and granite. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"DDH AN 7","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH868296","BOREHOLE_TOP_DEPTH_M":492.9,"BOREHOLE_BASE_DEPTH_M":493.7,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7226665,"LONG_GDA94":140.2073571,"ELEV_M_AHD":280,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. Metallogenic setting and temporal evolution of porphyry Cu-Mo mineralization and alteration in the Delamerian Orogen, South Australia: Insights from zircon U-Pb, molybdenite Re-Os, and in situ white mica Rb-Sr geochronology. 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(2023): Altered diorite containing fine-grained (10-100 micron) white mica as hydrothermal replacement after plagioclase. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"DDH AN 7","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH868296","BOREHOLE_TOP_DEPTH_M":543.6,"BOREHOLE_BASE_DEPTH_M":543.8,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7226665,"LONG_GDA94":140.2073571,"ELEV_M_AHD":280,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. 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Economic Geology, 118(6), 1291-1318.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.5012","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14781","geometry":{"type":"Point","coordinates":[140.2073571,-32.7226665]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14781,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678077","IGSN":"10.60494/2fqe-v490","SAMPLENO":9678077,"SAMPLE_ID":"AH20WH003","AGE_MA":439.6,"AGE_MA_UNCERTAINTY":13.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.98,"NUMBER_OF_ANALYSES":37,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 8900 series","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal alteration or thermal disturbance","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"initial 87Sr/86Sr ratio = 0.7080 +/- 0.0099","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Anabama Hill porphyry dyke","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous rock","LITHOLOGY":"porphyry","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Hong et al. (2023): Porphyritic dyke overprinted by intensive muscovite-quartz-pyrite alteration in veins. Other_ID is the Geological Survey of South Australia sample number, searchable in SARIG.","SAMPLING_FEATURE_NAME":"DDH AN 7","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH868296","BOREHOLE_TOP_DEPTH_M":65.5,"BOREHOLE_BASE_DEPTH_M":65.7,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7226665,"LONG_GDA94":140.2073571,"ELEV_M_AHD":280,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75783","AGE_REF":"Hong, W., Fabris, A., Wise, T., Collins, A.S., Gilbert, S., Selby, D., Curtis, S., Reid, A.J., 2023. 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Monazite in this sample exhibits little zoning in BSE imagery.","SAMPLING_FEATURE_NAME":"2018339033","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS629131","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"South Nicholson Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-17.89463,"LONG_GDA94":137.72047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-05-28","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73427","AGE_REF":"Clark, A.D., Morrissey, L.J., Doublier, M.P., Kositcin, N., Schofield, A., Skirrow, R.G., 2022. A newly recognised 1860-1840 Ma tectono-magmatic domain in the North Australia Craton: Insights from the Tennant Region, East Tennant area, and the Murphy Inlier. 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Australian Journal of Earth Sciences, 32(1), 7-36.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120098508729309","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15278","geometry":{"type":"Point","coordinates":[133.7249462,-30.1701523]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15278,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034220","IGSN":"10.60494/k1we-1r46","SAMPLENO":11034220,"SAMPLE_ID":"3813679","AGE_MA":2449,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":1,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GS21101-18, mount 1","ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 8900 series","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic population","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Christie Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Brown et al 2022: Sample 3813679 is a weakly foliated metapelitic gneiss comprising quartz, cordierite, biotite, Kfeldspar, garnet, muscovite, and minor sillimanite. The sample also contains trace sulphide, rutile, and monazite. Parallel to the foliation are potentially leucosomic mm-scale veins dominated by quartz, K-feldspar, cordierite, and sericite. Leucosomic quartz is finegrained and anhedral. In the matrix, quartz is typically preserved as subhedral porphyroblasts or myrmekite. Plagioclase is rare in the sample. Medium-grained garnet is typically blocky and fragmented, and pervasively replaced by fine-grained symplectic intergrowths of altered biotite and quartz. Comparatively coarse-grained anhedral biotite wraps medium- to coarse-grained garnet, cordierite, and quartz porphyroblasts. Subhedral cordierite porphyroblasts show polysynthetic twinning and can be slightly altered to sericite, not unlike K-feldspar. Sillimanite is rare in the sample and forms medium-grained tabular to elongated porphyroblasts, which are overprinted by fine-grained muscovite. Sillimanite is localised in quartzitic domains, particularly where myrmekitic quartz occurs. Sulphide is often associated with biotite and sometimes present as randomly distributed thin vein structures. Mineral proportions: quartz (~30 vol%), cordierite (~15 vol%), biotite (~15 vol%), K-feldspar (~15 vol%), garnet (~10 vol%), plagioclase (~5 vol%), muscovite (~5 vol%), sillimanite (~3 vol%), minor phases (<2 vol%).","SAMPLING_FEATURE_NAME":"AFM MUL 14","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH880905","BOREHOLE_TOP_DEPTH_M":111.76,"BOREHOLE_BASE_DEPTH_M":113,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1701523,"LONG_GDA94":133.7249462,"ELEV_M_AHD":207,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2021-08-02","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74363","AGE_REF":"Brown, D., Pawley, M., Williams, M., Reid, A., Jagodzinski, E., 2022. Zircon LA-ICP-MS geochronological and geochemical results from the central-western Gawler Craton. Geological Survey of South Australia. Report Book, 2022/00008, 139p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2022d112405","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15222","geometry":{"type":"Point","coordinates":[131.4652864,-29.6151034]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15222,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034251","IGSN":"10.60494/py4x-2t79","SAMPLENO":11034251,"SAMPLE_ID":"2115319","AGE_MA":1726,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.55,"NUMBER_OF_ANALYSES":27,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age phase 1","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":34325,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU34325","STRAT_UNIT_NAME":"Moondrah Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Moondrah Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"metamorphic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid et al 2019: This sample is a garnet, (former) cordierite, sillimanite metapelite from drill hole Lake Maurice East 1 in the Nawa Domain. All basement rock intercepted at the base of the Lake Maurice East 1 hole is altered, however, the peak metamorphic mineralogy and texture can be ascertained in sample 2115319. The primary mineral assemblage comprises garnet, former cordierite (now sericitised), sillimanite (partly sericitised), biotite, perthitic K-feldspar (partly sericitised), plagioclase (partly sericitised), quartz, magnetite and minor hemo-ilmenite. Accessory phases include monazite and zircon. A strong foliation is defined by sillimanite + garnet-magnetite +/- biotite-rich layers and quartz ribbons. At the thin-section scale, in high-strain zones, asymmetric tails on cordierite and feldspar grains define a shear fabric. Xenoblastic garnet porphyroblasts typically occur as aggregates (<15mm across), rich in both coarse and fine magnetite inclusions and minor biotite and quartz. Sericitised cordierite is characterised by pleochroic halos formed around zircon and monazite inclusions. Fine-grained biotite and quartz symplectites occur, in part replacing garnet at grain margins but also in the matrix. Monazite geochronology and phase equilibria modelling were conducted on this sample. ","SAMPLING_FEATURE_NAME":"Lake Maurice East 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH12835","BOREHOLE_TOP_DEPTH_M":738.5,"BOREHOLE_BASE_DEPTH_M":739,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6151034,"LONG_GDA94":131.4652864,"ELEV_M_AHD":218,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73649","AGE_REF":"Reid, A.J., Halpin, J.A., Dutch, R.A., 2019. Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic. Australian Journal of Earth Sciences, 66(8), 1085-1111.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2019.1602565","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14831","geometry":{"type":"Point","coordinates":[139.1473962,-34.8471205]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14831,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678112","IGSN":"10.60494/tpah-t192","SAMPLENO":9678112,"SAMPLE_ID":"R2078856","AGE_MA":509.29,"AGE_MA_UNCERTAINTY":0.28,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: chemical abrasion and isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: GV Isoprobe-T","LABORATORY_NAME":"Boise State University","AGE_INTERPRETED_FROM_SOURCE":"Interpreted to record emplacement of the contemporaneous Black Hill Norite","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Quoted uncertainty includes that of the EARTHTIME U/Pb tracer.","AGE_SOURCE":"Unpublished GSSA compilation","PROJECT":null,"STRATNO":14804,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14804","STRAT_UNIT_NAME":"Palmer Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Palmer Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"SARIG: Granite, albitised intrusives; medium to coarse-grained granodiorite, aplite and adamellite, strong biotite lineation, metasedimentary xenoliths. Previous Rb-Sr age of  479 +/- 15 Ma (initial 87Sr/86Sr = 0.7086).","SAMPLING_FEATURE_NAME":"R2078856","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS923503","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.8471205,"LONG_GDA94":139.1473962,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75784","AGE_REF":"Curtis, S., Payne, J., Crowley, J., Jagodzinski, L., Preiss, W., Pawley, M., Wise, T., Morrissey, L., McGee, L., 2022, Back-arc extension and inversion during the Delamerian Orogeny. IN: Folkes C.B. (compiler) Uncover Curnamona 2022: Symposium Presentations. Geological Survey of New South Wales Report GS, 2021/1733.","AGE_PUBLICATION_LINKS":"https://search.geoscience.nsw.gov.au/report/R00034736","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15132","geometry":{"type":"Point","coordinates":[136.5051089,-28.7287443]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15132,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034291","IGSN":null,"SAMPLENO":11034291,"SAMPLE_ID":"R2509353","AGE_MA":1515,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.56,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":"207Pb/206Pb weighted mean age 1528 +/- 13 Ma. MSWD = 2.18 n = 9.","AGE_REMARK_FROM_SOURCE":"206Pb/238U age is considered more reliable.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Ep-act-pl altered gneiss. Sample R2509353 is a calc-silicate metasomatite taken from drillhole DC09D01 at 518 m depth. This sample was taken approximately 2.5 m downhole from Sample R2509352 to investigate the age and composition of titanite in the country rock at a greater distance from the ilmenite-rich vein. This sample has a similar alteration assemblage to the host rock of R2509352, containing epidote, actinolite, K-feldspar, calcite, titanite, clinopyroxene, ilmenite and pyrite. Epidote, actinolite and K-feldspar are the dominant alteration minerals in the sample, forming grains typically at 0.5-1 mm that are intergrown. Clinopyroxene is less abundant and is seen being pseudomorphed by actinolite. Titanite grains are largely of 50-300 um and are commonly associated with calcite. Minor pyrite is disseminated throughout the sample, forming irregular shaped grains at 50-300 um.","SAMPLING_FEATURE_NAME":"DC09D01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934759","BOREHOLE_TOP_DEPTH_M":517.9,"BOREHOLE_BASE_DEPTH_M":518.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.7287443,"LONG_GDA94":136.5051089,"ELEV_M_AHD":68,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-05-01","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15125","geometry":{"type":"Point","coordinates":[136.5051089,-28.7287443]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15125,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034292","IGSN":null,"SAMPLENO":11034292,"SAMPLE_ID":"R2509352","AGE_MA":1519,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.97,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Titanite analyses from the altered host rock.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein","MODE_OF_OCCURRENCE":"vein","SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Ilm-cpx-cal-ep-ttn vein. Sample R2509352 is a calc-silicate metasomatite taken from drillhole DC09D01 at 515.4 m depth. The sample is a strongly altered host rock crosscut by a ~3 cm-wide vein dominated by ilmenite. The host rock contains clinopyroxene, actinolite, epidote, plagioclase, hornblende, quartz and titanite, and the crosscutting vein comprises ilmenite, clinopyroxene, actinolite, epidote, calcite and titanite. Ilmenite and clinopyroxene are the most dominant minerals within the vein, forming grains up to 1.5 cm that are associated with calcite, actinolite and euhedral titanite grains that are up to 3 mm. Epidote (up to 500 um) commonly forms on the edges of ilmenite and titanite within the vein. Epidote is most abundant at the contact between the host rock and the crosscutting vein. There are also variations in the abundance of clinopyroxene, amphibole and plagioclase throughout the host rock. Actinolite is the dominant amphibole in the host rock, but hornblende is present in some domains. Actinolite inclusions occur within clinopyroxene, but actinolite and hornblende are also observed pseudomorphing clinopyroxene, suggesting multiple generations of amphibole are present. The variations in mineralogy in the host rock appear to be spatially controlled but do not seem to correspond to distance from the vein and therefore may reflect protolithic variation. Titanite is also disseminated throughout the host rock, forming smaller and more anhedral grains that are generally at 100-300 um.","SAMPLING_FEATURE_NAME":"DC09D01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934759","BOREHOLE_TOP_DEPTH_M":515.4,"BOREHOLE_BASE_DEPTH_M":515.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.7287443,"LONG_GDA94":136.5051089,"ELEV_M_AHD":68,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15149","geometry":{"type":"Point","coordinates":[137.87113292,-34.53929431]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15149,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034300","IGSN":"10.60494/21rs-r660","SAMPLENO":11034300,"SAMPLE_ID":"R1831633","AGE_MA":1584,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.1,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Allanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP IIe","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"fluid flow event","OTHER_AGE_INTERPRETED_FROM_SOURCE":"1580 +/- 9 Ma (MSWD 0.95, n = 33) = inverse isochron age - uncorrected.","AGE_REMARK_FROM_SOURCE":"This date of 1584 +/- 7 Ma is considered the best estimate for the timing of allanite crystallisation in this sample.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"skarn","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid & Jagodzinski 2011: The sample consists of quartz, pyrite, chalcopyrite, hematite (after magnetite) and allanite, with minor titanite, apatite and carbonate. Allanite is abundant and forms idiomorphic to subhedral crystals up to 2 mm in length. It is commonly intergrown with hematite and chalcopyrite, and chalcopyrite also occurs as an inclusion phase in allanite. Sample R1831633 shows evidence of late veining and fracturing accompanied by chloritisation, and many allanite grains contain chlorite-filled fractures. The Allanite sampled at 394 m from drillhole HDD026, intersects a zone of high grade mineralisation (21 m @ 3.35% Cu and 0.72g/t Au), within the Hillside Prospect.","SAMPLING_FEATURE_NAME":"HDD-026","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938946","BOREHOLE_TOP_DEPTH_M":394,"BOREHOLE_BASE_DEPTH_M":394.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5392943124,"LONG_GDA94":137.8711329209,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76117","AGE_REF":"Gregory, C., Reid, A., Say, P., Teale, G., 2011. Project PGC01-06: U-Pb geochronology of hydrothermal allanite and titanite and magmatic zircon from the Hillside Cu-Au Deposit, Yorke Peninsula. IN: Reid, A.J. and Jagodzinski, E.A. (Eds) 2011. PACE Geochronology: Results of collaborative geochronology projects 2009–10 South Australia. Department of Primary Industries and Resources South Australia. Mineral Exploration Data Package, RB 2011/00003, 95-124.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15131","geometry":{"type":"Point","coordinates":[137.8368,-34.5915]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15131,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034314","IGSN":"10.60494/pqbs-hr88","SAMPLENO":11034314,"SAMPLE_ID":"T13DD","AGE_MA":1513,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":31,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The monazite KDE plot indicates the age population is asymmetric, suggesting two age populations are present: ~1568 Ma and ~1513 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Bockmann et al 2022: Qz-kfs-crd-bt-sil-pl-hem gneiss. This metapelitic gneiss contains quartz, K-feldspar, cordierite, biotite, sillimanite (fibrolite), plagioclase and hematite. This sample has gneissic layering defined by domains of quartz, K-feldspar and plagioclase that alternate with sillimanite, hematite, cordierite and biotite. A strong foliation is defined by biotite, sillimanite and hematite. Grains of quartz, K-feldspar, cordierite and plagioclase are typically between 100 and 300 um, whereas biotite, hematite, and patches of sillimanite are typically between 1 and 3 mm.","SAMPLING_FEATURE_NAME":"T13DD","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938956","BOREHOLE_TOP_DEPTH_M":80.4,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5915,"LONG_GDA94":137.8368,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73644","AGE_REF":"Bockmann, M.J., Hand, M., Morrissey, L.J., Payne, J.L., Hasterok, D., Teale, G., Conor, C., 2022. 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Economic Geology, 118(6), 1291-1318.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.5012","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15270","geometry":{"type":"Point","coordinates":[132.21627508,-31.78435108]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15270,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034260","IGSN":"10.60494/aw3a-bj93","SAMPLENO":11034260,"SAMPLE_ID":"2115492","AGE_MA":1581,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":28,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age phase 1","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The data form a unimodal age population","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":28826,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28826","STRAT_UNIT_NAME":"Mulgathing Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"garnet, biotite-bearing quartzo-feldspathic gneiss, Nundroo Block of the Fowler Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"quarter core","SAMPLE_DESC":"Reid et al 2019: Sample 2115492 is a garnet, biotite-bearing quartzo-feldspathic gneiss from drill hole Nundroo 3 DDH. The sample contains garnet, biotite, plagioclase, K-feldspar and quartz. Trace pyrite, ilmenite, monazite, apatite and zircon are also observed. A strong foliation is defined by biotite and elongate quartz-feldspar domains. Garnet porphyroblasts are typically subidioblastic (<2mm) and inclusion-poor and biotite is observed to partly replace garnet at some grain margins. Pyrite and ilmenite are commonly intergrown with biotite. Monazite dating was undertaken on this sample in order to determine the timing of metamorphism; however, no phase equilibria modelling was performed as the peak metamorphic assemblage is stable over a wide range of P-T conditions.","SAMPLING_FEATURE_NAME":"Nundroo 3 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595301","BOREHOLE_TOP_DEPTH_M":72.15,"BOREHOLE_BASE_DEPTH_M":75.4,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.7843510823,"LONG_GDA94":132.2162750776,"ELEV_M_AHD":20,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73649","AGE_REF":"Reid, A.J., Halpin, J.A., Dutch, R.A., 2019. Timing and style of high-temperature metamorphism across the Western Gawler Craton during the Paleo- to Mesoproterozoic. Australian Journal of Earth Sciences, 66(8), 1085-1111.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2019.1602565","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15656","geometry":{"type":"Point","coordinates":[131.8546914,-31.3527713]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15656,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034234","IGSN":"10.60494/b0by-y002","SAMPLENO":11034234,"SAMPLE_ID":"R2017952","AGE_MA":1718,"AGE_MA_UNCERTAINTY":15,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":0.03,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"AR-43","ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":"weighted mean metamorphic age = 1728 +/- 25 Ma (MSWD = 0.24, n = 3).","AGE_REMARK_FROM_SOURCE":"This upper intercept age is the preferred age for zircon phase 2 (grey rims); the early metamorphic modification of this sample. The corresponding lower intercept = -1290 +/- 3000 Ma.","AGE_SOURCE":"GSSA/Original publication","PROJECT":null,"STRATNO":35382,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU35382","STRAT_UNIT_NAME":"Tunkillia Suite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Tunkillia Suite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"GSSA drillhole database: Metagabbro, minor mt, py, qtz, ap; weakly foliated. K-feldspar, biotite, feldspar, hornblende, quartz sericite. Sericitised plagioclase showing tartan twinning. Mosaic quartz, hornblende and feldspar. Pleochroic biotite. Trace opaques.","SAMPLING_FEATURE_NAME":"COL 43D","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH889318","BOREHOLE_TOP_DEPTH_M":53.6,"BOREHOLE_BASE_DEPTH_M":54,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.3527713,"LONG_GDA94":131.8546914,"ELEV_M_AHD":65,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2013-09-24","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71318","AGE_REF":"Reid, A., 2015. Zircon U-Pb geochronology from selected Paleoproterozoic igneous rocks of the Gawler Craton by laser ablation-inductively coupled plasma mass spectrometry. Geological Survey of South Australia. Report Book, 2015/00025, 62p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011044","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14871","geometry":{"type":"Point","coordinates":[138.99731262,-34.54735954]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14871,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9678118","IGSN":"10.60494/8qbr-jp76","SAMPLENO":9678118,"SAMPLE_ID":"TA","AGE_MA":492,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":1.34,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: Photon Machines Analyte198 femto-second laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7700","LABORATORY_NAME":"Macquarie University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":17803,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU17803","STRAT_UNIT_NAME":"Tanunda Creek Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Tanunda Creek I-type Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Strongly foliated granite. Sample not formally identified by Turner et al. (2022), but isotopic data referenced in Foden et al. (2002, J Geol Soc London 159, 557-575), where tabular data refers to Tanunda Creek Gneiss sample 88-TC1. Location data for that sample was extracted from Supplementary Material for Foden et al. (2020) and has been used here.","SAMPLING_FEATURE_NAME":"TA","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS923509","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5473595366,"LONG_GDA94":138.9973126235,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Foden, J.D.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75785","AGE_REF":"Turner, S., Ireland, T., Foden, J., Belousova, E., Worner, G., Keeman, J., 2022. A comparison of granite genesis in the Adelaide Fold Belt and Glenelg River Complex using U-Pb, Hf and O isotopes in zircon. Journal of Petrology, 63(11), egac102.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1093/petrology/egac102","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15156","geometry":{"type":"Point","coordinates":[136.5051089,-28.7287443]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15156,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034292","IGSN":null,"SAMPLENO":11034292,"SAMPLE_ID":"R2509352","AGE_MA":1494,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.49,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":"207Pb/206Pb weighted mean age 1503 +/- 12 Ma. MSWD = 2.05 n = 13","AGE_REMARK_FROM_SOURCE":"Titanite analyses from a cross-cutting ilmenite-rich vein in this sample. 206Pb/238U age is preferred.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein","MODE_OF_OCCURRENCE":"vein","SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Ilm-cpx-cal-ep-ttn vein. Sample R2509352 is a calc-silicate metasomatite taken from drillhole DC09D01 at 515.4 m depth. The sample is a strongly altered host rock crosscut by a ~3 cm-wide vein dominated by ilmenite. The host rock contains clinopyroxene, actinolite, epidote, plagioclase, hornblende, quartz and titanite, and the crosscutting vein comprises ilmenite, clinopyroxene, actinolite, epidote, calcite and titanite. Ilmenite and clinopyroxene are the most dominant minerals within the vein, forming grains up to 1.5 cm that are associated with calcite, actinolite and euhedral titanite grains that are up to 3 mm. Epidote (up to 500 um) commonly forms on the edges of ilmenite and titanite within the vein. Epidote is most abundant at the contact between the host rock and the crosscutting vein. There are also variations in the abundance of clinopyroxene, amphibole and plagioclase throughout the host rock. Actinolite is the dominant amphibole in the host rock, but hornblende is present in some domains. Actinolite inclusions occur within clinopyroxene, but actinolite and hornblende are also observed pseudomorphing clinopyroxene, suggesting multiple generations of amphibole are present. The variations in mineralogy in the host rock appear to be spatially controlled but do not seem to correspond to distance from the vein and therefore may reflect protolithic variation. Titanite is also disseminated throughout the host rock, forming smaller and more anhedral grains that are generally at 100-300 um.","SAMPLING_FEATURE_NAME":"DC09D01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934759","BOREHOLE_TOP_DEPTH_M":515.4,"BOREHOLE_BASE_DEPTH_M":515.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.7287443,"LONG_GDA94":136.5051089,"ELEV_M_AHD":68,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15126","geometry":{"type":"Point","coordinates":[136.5051089,-28.7287443]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15126,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034293","IGSN":null,"SAMPLENO":11034293,"SAMPLE_ID":"R2509351","AGE_MA":1532,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.74,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":"207Pb/206Pb weighted mean age 1555 +/- 15 Ma. MSWD = 2.20 n = 15","AGE_REMARK_FROM_SOURCE":"206Pb/238U age is considered more reliable for this sample.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous intrusive rock","LITHOLOGY":"pegmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Act-cal-ep altered pegmatite. Sample R2509351 is an altered pegmatite taken from drillhole DC09D01 at 493.7 m depth. It contains K-feldspar, quartz, plagioclase, actinolite, calcite, epidote and titanite. The pegmatite is dominated by K-feldspar, and also contains quartz and plagioclase that form grains up to 500 um. The pegmatite is altered by large grains (up to 1 cm) of actinolite that contain small inclusions (<50 um) of epidote that appear to be altered with dark haloes around the grains. Calcite (up to 500 um) and titanite (100-500 um) are also associated with the alteration assemblage, forming as inclusions within and at the margins of actinolite.","SAMPLING_FEATURE_NAME":"DC09D01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934759","BOREHOLE_TOP_DEPTH_M":493.7,"BOREHOLE_BASE_DEPTH_M":494.3,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.7287443,"LONG_GDA94":136.5051089,"ELEV_M_AHD":68,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-24","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15122","geometry":{"type":"Point","coordinates":[136.5051089,-28.7287443]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15122,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034294","IGSN":null,"SAMPLENO":11034294,"SAMPLE_ID":"R2509350","AGE_MA":1565,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.05,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":14973,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14973","STRAT_UNIT_NAME":"Peake Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"metasomatic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Cpx-ep-act-pl metasomatite. Sample R2509350 is a calc-silicate metasomatite taken from drillhole DC09D01 at 472.5 m depth. It contains clinopyroxene, epidote, plagioclase, actinolite, quartz, calcite, titanite and magnetite. Clinopyroxene, epidote, plagioclase and actinolite are intergrown and represent the dominant alteration minerals in this sample, forming grains largely at 1-10 mm. Magnetite, calcite and titanite are less abundant in the alteration assemblage, with magnetite and calcite forming grains at 100-500 um and titanite forming grains of variable size largely at 0.1-1 mm. Titanite grains commonly have dark margins in plane-polarised light, which suggests they have experienced minor alteration.","SAMPLING_FEATURE_NAME":"DC09D01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH934759","BOREHOLE_TOP_DEPTH_M":472.5,"BOREHOLE_BASE_DEPTH_M":472.7,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.7287443,"LONG_GDA94":136.5051089,"ELEV_M_AHD":68,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. 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Sample R2509358 is a foliated porphyritic granitoid taken from drillhole [DC09D01 *sic] at 338.1 m depth. It contains Kfeldspar, quartz, plagioclase, magnetite and titanite, with minor chlorite, pyrite and chalcopyrite. K-feldspar, quartz and plagioclase grains at 200-400 um largely dominate the matrix, along with disseminated magnetite grains (50-400 um). K-feldspar (largely of 4-8 mm) and quartz (up to 2 mm) phenocrysts occur within the matrix, where they may be elongate parallel to the foliation, along with magnetite. Titanite grains (largely of 50-300 um) occur on the margins of magnetite and in the quartzofeldspathic matrix. Titanite grains that occur on the margins of magnetite are typically pale with weak pleochroism, whereas titanite in the matrix in the vicinity of chlorite alteration typically form more rounded grains that show stronger pleochroism from pale to medium brown. Pyrite is disseminated throughout the sample, forming cubic grains that are largely at 150-200 um. NOTE: SARIG Drillhole database cites that this sample is from drillhole DCDH001.","SAMPLING_FEATURE_NAME":"DCDH001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH927312","BOREHOLE_TOP_DEPTH_M":338.1,"BOREHOLE_BASE_DEPTH_M":338.8,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.5098049407,"LONG_GDA94":136.3580499631,"ELEV_M_AHD":57,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15514","geometry":{"type":"Point","coordinates":[136.8965257,-30.4587054]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15514,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083802","IGSN":"10.60494/ja5m-xf47","SAMPLENO":11083802,"SAMPLE_ID":"LCD5","AGE_MA":1592.7,"AGE_MA_UNCERTAINTY":2.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":2.6,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Hematite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Thermo Scientific Triton TIMS","LABORATORY_NAME":"British Geological Survey","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":"Lower intercept = -2.03 +/- 0.69 Ma.","AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"RD2786A","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH897941","BOREHOLE_TOP_DEPTH_M":1578,"BOREHOLE_BASE_DEPTH_M":1578,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.4587054,"LONG_GDA94":136.8965257,"ELEV_M_AHD":103,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69255","AGE_REF":"Morrissey, L.J., Hand, M., Wade, B.P., Szpunar, M., 2013. Early Mesoproterozoic metamorphism in the Barossa Complex, South Australia: links with the eastern margin of Proterozoic Australia. Australian Journal of Earth Sciences, 60(8), 769-795.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2013.860623","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3876","geometry":{"type":"Point","coordinates":[129.68085583,-29.11777528]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3876,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2152082","IGSN":"10273/AU2152082","SAMPLENO":2152082,"SAMPLE_ID":"R1964851","AGE_MA":1167,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.99,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6225","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"drill chips/cuttings","SAMPLE_DESC":"The sample occurs ~55 m below the interpreted base of the Officer Basin. The sample was collected from drill cuttings, and is interpreted to be a granitoid. A thin section description from the Kutjara 1 well completion report indicates that a sample of minerals and rock chips from a depth of 2442 m contains quartz, K-feldspar, plagioclase and biotite, while other chips are classified as low-grade metasedimentary rocks.","SAMPLING_FEATURE_NAME":"Kutjara 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH568094","BOREHOLE_TOP_DEPTH_M":2445,"BOREHOLE_BASE_DEPTH_M":2453.7,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.1177752778,"LONG_GDA94":129.6808558333,"ELEV_M_AHD":278,"ACCURACY_M":100,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69243","AGE_REF":"Neumann, N.L., Korsch, R.J., 2014. SHRIMP U-Pb zircon ages from Kutjara 1 and Mulyawara 1, northwestern South Australia. Geoscience Australia. Record, 2014/05, 18p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2014.005","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15261","geometry":{"type":"Point","coordinates":[136.35804996,-28.50980494]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15261,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034238","IGSN":"10.60494/veaf-0h07","SAMPLENO":11034238,"SAMPLE_ID":"R2509358","AGE_MA":1497,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.47,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"foliated granitoid","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Bockmann et al 2023: Foliated granitoid. Sample R2509358 is a foliated porphyritic granitoid taken from drillhole [DC09D01 *sic] at 338.1 m depth. It contains Kfeldspar, quartz, plagioclase, magnetite and titanite, with minor chlorite, pyrite and chalcopyrite. K-feldspar, quartz and plagioclase grains at 200-400 um largely dominate the matrix, along with disseminated magnetite grains (50-400 um). K-feldspar (largely of 4-8 mm) and quartz (up to 2 mm) phenocrysts occur within the matrix, where they may be elongate parallel to the foliation, along with magnetite. Titanite grains (largely of 50-300 um) occur on the margins of magnetite and in the quartzofeldspathic matrix. Titanite grains that occur on the margins of magnetite are typically pale with weak pleochroism, whereas titanite in the matrix in the vicinity of chlorite alteration typically form more rounded grains that show stronger pleochroism from pale to medium brown. Pyrite is disseminated throughout the sample, forming cubic grains that are largely at 150-200 um. NOTE: SARIG Drillhole database cites that this sample is from drillhole DCDH001.","SAMPLING_FEATURE_NAME":"DCDH001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH927312","BOREHOLE_TOP_DEPTH_M":338.1,"BOREHOLE_BASE_DEPTH_M":338.8,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.5098049407,"LONG_GDA94":136.3580499631,"ELEV_M_AHD":57,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-13","SAMPLE_ORIGINATOR":"Bockmann, M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76114","AGE_REF":"Bockmann, M.J., Payne, J.L., Hand, M., Morrissey, L.J., Belperio, A.P., 2023, Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain, northeastern Gawler Craton. Geoscience Frontiers, 14/5.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gsf.2023.101596","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15679","geometry":{"type":"Point","coordinates":[133.5376582,-30.3288493]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15679,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083791","IGSN":"10.60494/nt2p-pb72","SAMPLENO":11083791,"SAMPLE_ID":"R8047","AGE_MA":2435,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.7,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"DATA REPROCESSED: Fanning (1997) reported a metamorphic SHRIMP age of 2437 +/- 11 Ma (SampleID  5637 RS1551) however, this age data has been recalculated for Fanning et al. (2007) publication, which supersedes this previous age.","AGE_SOURCE":"GSSA/Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Metanorite, Blackfellow Hill Pyroxenite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BLACKFELLOW HILL 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH886306","BOREHOLE_TOP_DEPTH_M":113.2,"BOREHOLE_BASE_DEPTH_M":113.6,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.3288493,"LONG_GDA94":133.5376582,"ELEV_M_AHD":190,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65376; 73609","AGE_REF":"Fanning, C.M., 1997. Geochronological synthesis of southern Australia - Part 1 The Curnamona Province, and Part 2 The Gawler Craton. South Australia. Department of Mines and Energy. Open File Envelope, 8918, 76.; Fanning, C.M., Reid, A.J., Teale, G.S., 2007. A geochronological framework for the Gawler Craton, South Australia. Geological Survey of South Australia Bulletin, 55, 258p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2018d037833; https://pid.sarig.sa.gov.au/document/mesac19443","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15434","geometry":{"type":"Point","coordinates":[135.21046986,-34.55449126]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15434,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083910","IGSN":"10.60494/dt0k-kj87","SAMPLENO":11083910,"SAMPLE_ID":"SB 32","AGE_MA":1708,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":6.6,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"closure of the isotopic system post-peak metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":27899,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27899","STRAT_UNIT_NAME":"Sleaford Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"metabasic dyke","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"metamorphosed basic igneous rock","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"SB 32","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS1008616","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5544912604,"LONG_GDA94":135.2104698605,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":"Coffin Bay Peninsula, South Coast","SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72058","AGE_REF":"Keyser, W., Ciobanu, C.L., Cook, N.J., Courtney-Davies, L., Kennedy, A., Wade, B.P., Ehrig, K., Dmitrijeva, M., Kontonikas-Charos, A., Feltus, H., Johnson, G., 2019. Petrographic and geochronological constrains on the granitic basement to the Middleback Ranges, South Australia. Precambrian Research, 324, 170-193.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2019.01.024","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15458","geometry":{"type":"Point","coordinates":[135.20582202,-34.42856015]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15458,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083853","IGSN":"10.60494/b7zs-hk47","SAMPLENO":11083853,"SAMPLE_ID":"A2020","AGE_MA":1712,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.12,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"closure of the isotopic system post-peak metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":27899,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27899","STRAT_UNIT_NAME":"Sleaford Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"metabasic dyke","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"metamorphosed basic igneous rock","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"A2020","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS1008559","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.4285601451,"LONG_GDA94":135.2058220213,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":"Coffin Bay Peninsula, Pt Sir Isaac","SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74358","AGE_REF":"Courtney-Davies, L., Ciobanu, C.L., Tapster, S.R., Cook, N.J., Ehrig, K., Crowley, J.L., Verdugo-Ihl, M.R.,, Wade, B.P., Condon, D.J., 2020. Opening the magmatic-hydrothermal window: High-precision U-Pb geochronology of the Mesoproterozoic Olympic Dam Cu-U-Au-Ag deposit, South Australia. Economic Geology, 115(8), 1855-1870.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.4772","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1459","geometry":{"type":"Point","coordinates":[136.72430304,-23.85100911]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1459,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1840207","IGSN":"10273/AU1840207","SAMPLENO":1840207,"SAMPLE_ID":"2005089523","AGE_MA":469,"AGE_MA_UNCERTAINTY":2.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.44,"NUMBER_OF_ANALYSES":33,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not captured","MINERAL":"Monazite","MOUNT_ID":"GA6029","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Larapinta Event","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Gneiss, Bmr Hay River-4","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"andalusite schist","SAMPLING_FEATURE_NAME":"HV06DFC003","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620915","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.8510091126,"LONG_GDA94":136.7243030437,"ELEV_M_AHD":222,"ACCURACY_M":100,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. 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Evidence for shear heating, Musgrave Block, central Australia. 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Evidence for shear heating, Musgrave Block, central Australia. Journal of Structural Geology, 23(6-7), 1007-1013.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0191-8141(00)00172-3","AGE_ENTRY_DATE":"2019-08-30","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15548","geometry":{"type":"Point","coordinates":[136.89644051,-30.45387214]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15548,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083834","IGSN":"10.60494/68xn-x317","SAMPLENO":11083834,"SAMPLE_ID":"RX6607 ","AGE_MA":1597,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Hematite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"RD2852A ","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH1008538","BOREHOLE_TOP_DEPTH_M":495,"BOREHOLE_BASE_DEPTH_M":495,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.4538721441,"LONG_GDA94":136.8964405097,"ELEV_M_AHD":0,"ACCURACY_M":100,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73166; 76136","AGE_REF":"Cherry, A.R., Kamenetsky, V.S., McPhie, J., Thompson, J.M., Ehrig, K., Meffre, S., Kamenetsky, M.B., Krneta, S., 2018. Tectonothermal events in the Olympic IOCG Province constrained by apatite and REE phosphate geochronology. Australian Journal of Earth Sciences, 65(5), 643-659.; Thompson, J., Meffre, S., Maas, R., Kamenetsky, V., Kamenetsky, M.B., Goemann, K., Ehrig, K., Danyushevsky, L.V., 2016. Matrix effects in Pb/U measurements during LA-ICP-MS analysis of the mineral apatite. Journal of Analytical Atomic Spectrometry, 31(6), 1206-1215.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1039/C6JA00048G; https://doi.org/10.1080/08120099.2018.1465473","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1060","geometry":{"type":"Point","coordinates":[135.02510145,-22.4938429]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1060,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2152595","IGSN":"10273/AU2152595","SAMPLENO":2152595,"SAMPLE_ID":"HU13JAW002","AGE_MA":490,"AGE_MA_UNCERTAINTY":20,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.05,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6234","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Biotite Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"drill chips/cuttings","SAMPLE_DESC":"A sample of strongly foliated biotite granite was collected for SHRIMP U-Pb zircon geochronology from drillhole DDNT-12-2 from the Perenti Prospect. The Perenti Prospect is located in the eastern Arunta Region, northeast of Alice Springs in central western HUCKITTA. The prospect was drilled by Central Pacific Minerals in 1970. The best intersection is reported as 13 m at 0.6% Cu (Ivanac 1970). Later re-assaying of samples from DDNT-12-2 yielded results which include 0.5 m at 196 ppm Cu from 160 m (Stephens 2009). In drillhole DDNT-12-2, the biotite granite is crosscut by polymetallic veins, which are commonly brecciated and comprised of quartz, fluorite, chalcopyrite and hematite. Proximal to these veins, the host granite is intensely brecciated, possibly hydrothermally, and pervasively altered. Pink to red feldspars indicate intense hematitic and possible potassic alteration. The sample selected for geochronology was collected away from the alteration halo, in strongly foliated granite comprises biotite, microcline, plagioclase and quartz.","SAMPLING_FEATURE_NAME":"DDNT12-2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620842","BOREHOLE_TOP_DEPTH_M":66.29,"BOREHOLE_BASE_DEPTH_M":70.03,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4938429005,"LONG_GDA94":135.0251014507,"ELEV_M_AHD":532,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69510","AGE_REF":"Kositcin, N., Whelan, J.A., Hallett, L., Beyer, E.E., 2014. Summary of results. Joint NTGS-GA geochronology project: Amadeus Basin, Arunta Region and Murphy Province July 2012-June 2013. Northern Territory Geological Survey Record, 2014-005, 24p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82466","AGE_ENTRY_DATE":"2014-03-21","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15479","geometry":{"type":"Point","coordinates":[138.44047236,-35.43648588]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15479,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083915","IGSN":"10.60494/xc1q-n673","SAMPLENO":11083915,"SAMPLE_ID":"WD-5C","AGE_MA":1578,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":0.48,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"timing of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"garnet-sillimanite-biotite-bearing metapelites of the Barossa Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"WD-5C","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS1008621","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-35.436485878,"LONG_GDA94":138.4404723573,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"76137","AGE_REF":"Rusak, T., 2011, Geochemistry of Early Mesoproterozoic mafic rocks of the Coober Pedy Ridge, northern Gawler Craton. Unpublished B.Sc. Honours thesis, University of Adelaide, 88.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2013.860623","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3617","geometry":{"type":"Point","coordinates":[143.83910855,-19.02376789]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3617,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1497387","IGSN":"10273/AU1497387","SAMPLENO":1497387,"SAMPLE_ID":"93837502","AGE_MA":1567,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8356","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: The zircons in this leucogneiss have a large range of ages. Those between 1850 Ma and 2800 Ma are thought to be of detrital origin. Younger grains, especially those forming peaks at about 1567 Ma and 1543 Ma, probably formed within the leucogneiss.","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":"North Queensland NGMA project","STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartz-plagioclase-magnetite leucogneiss","SAMPLING_FEATURE_NAME":"93837502","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS186489","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Einasleigh Subprovince","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.0237678883,"LONG_GDA94":143.8391085508,"ELEV_M_AHD":624,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Blacksoil Creek 100 m upstream from junction with Percy River.","SAMPLE_ACQUISITION_DATE":"1993-11-16","SAMPLE_ORIGINATOR":"Black, L.P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.218","geometry":{"type":"Point","coordinates":[129.13233564,-26.22861115]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":218,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1478916","IGSN":"10273/AU1478916","SAMPLENO":1478916,"SAMPLE_ID":"90984002","AGE_MA":1223,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.23,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8232","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: Both euhedral and anhedral zoned zircon cores (18 data points) give this age for the igneous protolith of the felsic granulite. Five data points reflect metamorphic overgrowth age of 1223+/-7 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":22396,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22396","STRAT_UNIT_NAME":"Mount Aloysius Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Aloysius Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"OPX-QZ-PL-KFS gneiss","SAMPLING_FEATURE_NAME":"90984002","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS148313","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Block","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.2286111514,"LONG_GDA94":129.1323356403,"ELEV_M_AHD":615,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Tomkinson Ranges. NW of Pulalpulal","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Sheraton, J.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.220","geometry":{"type":"Point","coordinates":[129.16933463,-26.16661057]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":220,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1478917","IGSN":"10273/AU1478917","SAMPLENO":1478917,"SAMPLE_ID":"90984003","AGE_MA":1198,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":6.5,"NUMBER_OF_ANALYSES":26,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8233","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: Zoned, slender igneous zircons give a concordant age based on 26 data points. It represents the time of D2 deformation, granulite-facies metamorphism and crustal melting. Inherited zircon cores indicate source-rock age of 1296+/-10 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Minno Granite Gneiss","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"BT granite gneiss","SAMPLING_FEATURE_NAME":"90984003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS148314","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Block","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.1666105747,"LONG_GDA94":129.1693346313,"ELEV_M_AHD":656,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Tomkinson Ranges. Minno Hill","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Sheraton, J.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13105","geometry":{"type":"Point","coordinates":[145.5861992,-42.27264561]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13105,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1480507","IGSN":"10273/AU1480507","SAMPLENO":1480507,"SAMPLE_ID":"77220101","AGE_MA":173,"AGE_MA_UNCERTAINTY":35,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":8,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: two-stage column separation","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"not reported","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Age uncertainty in publication: +144/-74 Ma","AGE_SOURCE":null,"PROJECT":null,"STRATNO":5256,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU5256","STRAT_UNIT_NAME":"Darwin Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Darwin Granite (Cambrian)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":"pluton","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"sheared/altered pink/coarse ortho-qtz, wert.  Adams et al (1985 AJES) paraphased: The small Darwin Granite body (4 km x 1 km) intrudes rhyolites of the central volcanic sequence near Mt Darwin, 25 km S of Queenstown. It is overlain disconformably by the volcanosedimentary eastern sequence, which is in turn overlain unconformably by the Owen Conglomerate (Corbett 1979). The granite is somewhat sheared and altered, and dating has not previously been attempted. Only U-Pb zircon dating was attempted on this granite; the sample was collected from a relatively uncleaved outcrop on the N side of the access road on South Darwin Plateau.","SAMPLING_FEATURE_NAME":"77220101","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS161463","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Dundas Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-42.2726456133,"LONG_GDA94":145.5861991951,"ELEV_M_AHD":686,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"South Darwin Plateau 25km S of Queenstown. Mt Darwin N side access road","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Black, L.P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"39892","AGE_REF":"Adams, C.J., Black, L.P., Corbett, K.D., Green, G.R., 1985. Reconnaissance isotopic studies bearing on the tectonothermal history of Early Palaeozoic and Late Proterozoic sequences in Western Tasmania. 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The analysed sample is an altered, quartz-poor granitoid (Page and Sun, 1998 AJES) featuring K-feldspar, amphibole and magnetite.","SAMPLING_FEATURE_NAME":"92208038","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS149582","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Naraku Batholith","GEOLOGICAL_REGION_NAME":"Carpentaria Lowlands Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.4566634071,"LONG_GDA94":140.8170771023,"ELEV_M_AHD":150,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Eastern Fold Belt. about 20 km east of Mount Fort Constantine.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Wyborn, L.A.I.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"44195","AGE_REF":"Page, R.W., Sun, S-S., 1998. Aspects of geochronology and crustal evolution in the Eastern Fold Belt, Mt Isa Inlier. 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The significance of current and proposed SHRIMP dating. 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Possibility that the age is instead a partial response to Devonian orogenic event. Model 2 isochron age derived from multiple samples including AGENOs 12095,12098,12096,12097,12099,12094. 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The analysed sample is an altered porphyroblastic, garnetiferous felsic gneiss which crops out near Maramungee Creek (Page and Sun, 1998 AJES), and was interpreted by Blake et al. 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Original comment: Most of the zircon population define an age of 1762+/-9 Ma, interpreted as the magmatic crystallisation age. 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Original comment: 'This age for the Warrego Gte is quite uncertain because the 207/206 ages of both xenotimes and zircons range from 1850 to 1630 Ma, excluding discordant analyses. The Ar-Ar data in fact suggest a minimum age of 1677+/-4 Ma.'","AGE_SOURCE":"GA Geochron Delivery","PROJECT":null,"STRATNO":19519,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU19519","STRAT_UNIT_NAME":"Warrego Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Warrego Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"\"Warrego\" granite. Corase K-feldspar-plagioclase-quartz-muscovite-biotite. Chlorite-hematite alteration. Accessory zircon, apatite, xenotime.","SAMPLING_FEATURE_NAME":"BMR-NTGS 7","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH118334","BOREHOLE_TOP_DEPTH_M":82.91,"BOREHOLE_BASE_DEPTH_M":85.65,"GEOLOGICAL_PROVINCE":"Tennant Creek Block","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":"Tennant Creek Block","STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.4289092387,"LONG_GDA94":134.1010571933,"ELEV_M_AHD":348,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Compston, D.M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"1900","AGE_REF":"Compston, D.M., 1994, The geochronology of the Tennant Creek Inlier and its ore deposits, Northern Territory. Ph.D. Thesis, Australian National University, 216p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.25911/5d77862d585b0","AGE_ENTRY_DATE":"2019-08-08","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.243","geometry":{"type":"Point","coordinates":[143.35166133,-14.00175886]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":243,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1479387","IGSN":"10273/AU1479387","SAMPLENO":1479387,"SAMPLE_ID":"91831004","AGE_MA":1561,"AGE_MA_UNCERTAINTY":15,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.2,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8261","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: All 6 dated zoned igneous rims yield an age of 1561+-15 Ma, which possibly dates in situ partial metamorphism. The 8 youngest cores yield a combined age of 1638+-9 Ma. Other cores range up to ~2650 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":"North Queensland NGMA project","STRATNO":14068,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14068","STRAT_UNIT_NAME":"Newberry Metamorphic Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Newberry Metamorphic Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"gneiss","SAMPLING_FEATURE_NAME":"91831004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS152470","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Subprovince","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-14.0017588566,"LONG_GDA94":143.3516613256,"ELEV_M_AHD":312,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":"Coen Inlier, North Queensland. 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The highest grade sample of Hores Gneiss([8618.] 2008) is a coarsely granoblastic felsic garnet-biotite gneiss, mineralogically similar to the Southern Cross sample [8618.2006] but, from nearby mafic mineralogy, known to have recrystallized under conditions of the two-pyroxene granulite facies. The sample site is located a few hundred meters from the Broken Hill main lode, on the eastern side of the New Broken Hill Consolidated sports ground. This gneisss has fabric elements of both deformations: composite S1-2 gneissosity, produced in very strong D2 deformation (Laing et al., 1978). 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An extended episode of early Mesoproterozoic metamorphic fluid flow in the Reynolds Range, central Australia \t\t. Journal of Metamorphic Geology, 14(1), 29-47.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00029.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13686","geometry":{"type":"Point","coordinates":[140.19564688,-31.92836475]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13686,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1551426","IGSN":"10273/AU1551426","SAMPLENO":1551426,"SAMPLE_ID":"R480544","AGE_MA":1576,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.1,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3393","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism, as measured on mount Z3393 during the 12 July 1999 analytical session.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":37091,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU37091","STRAT_UNIT_NAME":"Plumbago Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"siltstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Page et al. (2005, Econ Geol, p. 663) paraphrased: \"Mount Howden section: The sample of the Plumbago Formation in the Mount Howden section was taken from a 3- to 5-m-thick, graphitic, laminated metasiltstone directly overlying carbonate units of the Bimba Formation at the Mount Howden cobalt mine. The zircons extracted from this rock (sample 98185016) are encrusted by unevenly thick, discontinuous, altered high-U rims. Some zircon rims form thick, bulbous edges that distort the grain shapes. Elsewhere in the Curnamona province, such high-U metamorphic rims have been shown to have formed at ca. 1600 Ma (e.g., Page and Laing, 1992).\" This sample displays a fine-grained weakly foliated metamorphic texture, modified by sericitic overprinting. Quartz is moderately abundant, forming small clear anhedral grains that form a granoblastic mosaic throughout the rock. Sericite forms small randomly oriented flakes which are concentrated in ragged patches between the quartz grains: the sericite appears to have replaced a precursor interstitial phase (eg ?plagioclase). Opaques (?graphite) are moderately abundant, forming small randomly oriented flakes that are distributed more-or-less uniformly throughout the rock. Biotite is present as pleochroic drab brown flakes whose preferred orientation defines a weak foliation: the drab yellow-brown colour of the flakes suggests they have suffered mild modification in response to alteration. This sample is considered to have formed as a fine-grained carbonaceous pelitic sediment. It has suffered complete recrystallisation in response to a regional metamorphic event, generating the new weakly foliated assemblage of quartz + ?plagioclase + opaques (?graphite) + biotite. Subsequent retrogressive alteration generated fine-grained randomly oriented sericite after the precursor ?plagioclase.","SAMPLING_FEATURE_NAME":"98185016","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS98239","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Willyama Block","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.9283647485,"LONG_GDA94":140.1956468788,"ELEV_M_AHD":214,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mount Howden","SAMPLE_ACQUISITION_DATE":"1998-05-28","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7345","geometry":{"type":"Point","coordinates":[115.89641362,-26.75679841]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7345,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1547975","IGSN":"10273/AU1547975","SAMPLENO":1547975,"SAMPLE_ID":"105005","AGE_MA":2634,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.35,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"not reported","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"A U-Pb zircon date of 2735 +/- 9 Ma determined for this sample (Nelson, 1996) was interpreted as the igneous crystallization age of the granitic protolith to this gneiss.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":13916,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13916","STRAT_UNIT_NAME":"Narryer Gneiss Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Narryer Gneiss Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Leucocratic orthogneiss, Diffuse melt patches. Undeformed leucocratic dyke nearby","SAMPLING_FEATURE_NAME":"105005","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS94816","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Western Gneiss Terrane","GEOLOGICAL_REGION_NAME":"Carnarvon Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.7567984121,"LONG_GDA94":115.8964136237,"ELEV_M_AHD":316,"ACCURACY_M":50,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Leucocratic orthogneiss, Bluebush Well","SAMPLE_ACQUISITION_DATE":"1994-11-24","SAMPLE_ORIGINATOR":"Nelson, D.R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Nelson, DR 1999, 105005: leucocratic orthogneiss, Bluebush Well; Geochronology Record 10: Geological Survey of Western Australia, 4p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/105005.2.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1239","geometry":{"type":"Point","coordinates":[135.55827331,-22.69171496]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1239,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1553559","IGSN":"10273/AU1553559","SAMPLENO":1553559,"SAMPLE_ID":"98096004","AGE_MA":1730,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.86,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3212","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: interpreted age of metamorphism, based on 12 concordant analyses, error t sigma, QGNG, protolith age 1805+/-7 based on 20 concordant analyses","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"Joint NTGS - AGSO project","STRATNO":23539,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23539","STRAT_UNIT_NAME":"Deep Bore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Deep Bore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"gneiss","SAMPLING_FEATURE_NAME":"98096004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS100983","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6917149572,"LONG_GDA94":135.5582733122,"ELEV_M_AHD":473,"ACCURACY_M":200,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Smith, J.B.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23809; 73121","AGE_REF":"Scrimgeour, I.R., Raith, J., 2001, Some tectonothermal surprises in the Eastern Arunta Province. Annual geoscience exploration seminar (AGES) record of abstracts, 12.; Smith, J., 2001. Summary of results. Joint NTGS-AGSO age determination program 1999-2001. Northern Territory Geological Survey Record, 2001-007, 53p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/71270; https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/81524/4/NTGSRec2001-006.pdf","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14605","geometry":{"type":"Point","coordinates":[148.05556012,-34.16758766]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14605,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1554162","IGSN":"10273/AU1554162","SAMPLENO":1554162,"SAMPLE_ID":"98843163","AGE_MA":438.9,"AGE_MA_UNCERTAINTY":3.5,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":59,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"metamorphic zircon","OTHER_AGE_INTERPRETED_FROM_SOURCE":"crystallisation","AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON. Original comment: 'All 59 analyses yield an age of 438.9+-3.5 Ma for the crystallisation of what is interpreted to be the metamorphic zircon in this amphibolite.'","AGE_SOURCE":"OZCHRON","PROJECT":"Lachlan NGMA Project","STRATNO":26198,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26198","STRAT_UNIT_NAME":"Wambidgee Serpentinite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wambidgee Serpentinite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Corresponds to Franklin's BF91/33f site","SAMPLING_FEATURE_NAME":"98843163","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS101715","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Lachlan Region","STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-34.167587657,"LONG_GDA94":148.0555601205,"ELEV_M_AHD":372,"ACCURACY_M":25,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Thuddungra. Paddock north of magnesite mine","SAMPLE_ACQUISITION_DATE":"1998-12-02","SAMPLE_ORIGINATOR":"Lyons, P.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72939","AGE_REF":"Geoscience Australia, 2007, Geoscience Australia SHRIMP U-Pb geochronology interim data release, July 2007. Geoscience Australia.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/65358","AGE_ENTRY_DATE":"2024-03-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13700","geometry":{"type":"Point","coordinates":[140.30070196,-32.11499493]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13700,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1567539","IGSN":"10273/AU1567539","SAMPLENO":1567539,"SAMPLE_ID":"R480554","AGE_MA":1596,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.22,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3138","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":29887,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29887","STRAT_UNIT_NAME":"Bimba Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"carbonate sedimentary rock","LITHOLOGY":"calc-silicate rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Layered, medium-grained, quartz-feldspar-amphibole-epidote calc-silicate. This sample displays an inequigranular granoblastic metamorphic texture, with indistinct mineralogical layering. Felsic minerals are abundant, forming a granoblastic mosaic throughout the rock: K-feldspar forms tartan-twinned anhedral grains, plagioclase forms anhedral grains spotted by biotite and epidote, and quartz forms clear anhedral grains. Some thinner layers are finer grained. Biotite forms small randomly oriented pleochroic tan brown to pale yellow flakes throughout the rock. Opaques (mostly ?magnetite) form equant subhedral crystals that reflect the varied size of feldspar grains: larger opaques in coarser layers, and smaller opaques in thinner finer-grained layers. Epidote occurs mostly as small anhedral grains, locally occurring in plagioclase grains but also forming larger coarser-grained aggregates. Chlorite occurs in minor amount as small pleochroic green flakes, in equilibrium with the biotite (ie no replacement relationship). Calcite occurs in minor amount as small anhedral grains. Sphene forms small to large anhedral grains. Apatite occurs as equant grains that appear to be more abundant in some layers than others. This sample is considered to have formed as a layered sediment. Regional metamorphism has caused complete recrystallisation, forming granoblastic assemblages mainly of K-feldspar, plagioclase, quartz, biotite, opaques (?magnetite), and epidote, with minor to trace chlorite, calcite, sphene and apatite. Variation in mineralogy and grain size between layers appears to reflect metamorphic response to primary compositional differences between the layers, but compositions may have been modified by fluid flow during this event.","SAMPLING_FEATURE_NAME":"98185026","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS98251","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Willyama Block","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1149949319,"LONG_GDA94":140.3007019602,"ELEV_M_AHD":313,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Olary Province, Mulga Bore area","SAMPLE_ACQUISITION_DATE":"1998-05-28","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13922","geometry":{"type":"Point","coordinates":[116.46273407,-30.4651427]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13922,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1568565","IGSN":"10273/AU1568565","SAMPLENO":1568565,"SAMPLE_ID":"99967082C","AGE_MA":2619,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The U abundances are ~100 ppm and the common Pb corrections are all small. The data show a tight grouping in both 207Pb/206Pb and Pb/U, which is taken as evidence that these data are concordant. Omitting four statistical (old) outliers leaves a single age population of 17 analyses with chi^2 = 0.45. The corresponding age of 2619 +/-8 Ma. The titanite date is distinct from all the zircon data groups. The titanite age of 2619 +/-8 Ma is considered to be the age of the granitoid in which it now sits.  U/Pb scatter (1sigma) for Khan standard = 1.36% (n = 13). Common-Pb corrected using Cumming & Richards (1975) Model III @ 2620 Ma. # Analysed using NO2- primary ion beam.    Pb/U calibration might be slightly disturbed.    Th/U calibration is not reliable;  Th abundances are indicative only, and Pb/Th are not reported.","AGE_SOURCE":"OZCHRON/publication","PROJECT":"Yilgarn NGMA Project","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed gneiss xenolith - Dookaling","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":"xenolith","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample is from a large xenolith of strongly feldspar-porphyroblastic medium-grained biotite augen gneiss within a relatively homogeneous fine-grained biotite granite. Other xenoliths of banded granitic gneiss. Biotite granite also contains biotite-rich clots and schlieren. All rocks cut by minor pegmatites and rare quartz veins.","SAMPLING_FEATURE_NAME":"99967082","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS105158","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Murchison Province","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Yilgarn Region","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-30.4651427011,"LONG_GDA94":116.4627340702,"ELEV_M_AHD":331,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Drilled and hammered from blasted rock 50 m south of road.","SAMPLE_ACQUISITION_DATE":"1999-04-13","SAMPLE_ORIGINATOR":"Cassidy, K.F.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7987","AGE_REF":"Fletcher, I.R., McNaughton, N.J., 2001. Granitoid geochronology: SHRIMP zircon and titanite data. In: Characterisation and metallogenic significance of Archaean granitoids of the Yilgarn Craton, Western Australia. AMIRA Project P482/MERIWA Project M281. MERIWA Report 222, Chapter 6, 6.1-6.158.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/11/ReportNumber/222","AGE_ENTRY_DATE":"2024-02-08","AGE_LAST_UPDATED":"2024-02-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13675","geometry":{"type":"Point","coordinates":[140.29460547,-32.12070771]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13675,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1567541","IGSN":"10273/AU1567541","SAMPLENO":1567541,"SAMPLE_ID":"R480558","AGE_MA":1596,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":3.2,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"Z3099","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":29842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29842","STRAT_UNIT_NAME":"Peryhumuck Formation","INFORMAL_UNIT_NAME":"calc-silicate, Peryhumuck Formation, Ethiudna Subgroup (basal unit)","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"calc-silicate rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"green-grey plagioclase-diopside meta-sediment (calc-silicate sediment). This sample displays an inequigranular granoblastic metamorphic texture with indistinct mineralogical layering. Plagioclase is abundant, forming equant anhedral twinned grains in granoblastic mosaic texture throughout the rock: coarser-grained and finer-grained lenses define indistinct layering. Diopsidic clinopyroxene is moderately abundant, forming equant subhedral to anhedral weakly pleochroic green grains. Minor actinolite (pleochroic paler green, lower relief) form subhedral grains intergrown with the diopside. Lens-like aggregates of the ferromagnesian grains contribute to the indistinct layering. Opaques (mainly ?magnetite) form equant euhedral crystals that are smaller in the finer-grained lenses and coarser in the coarser-grained lenses. Quartz occurs only in some coarser lenses, where it forms anhedral sutured aggregates. Sphene forms minor small grains. This sample may have formed as a calc-silicate sediment composed of varied components. Regional metamorphism has caused complete recrystallisation to form the new granoblastic assemblage of plagioclase + diopside + opaques (?magnetite) + minor quartz + actinolite + trace sphene. Finer-grained and coarser-grained lenses or bands are considered to reflect precursor layering.","SAMPLING_FEATURE_NAME":"98185030","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS98256","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Willyama Block","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1207077083,"LONG_GDA94":140.2946054737,"ELEV_M_AHD":330,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"about 1km south of Mulga Bore","SAMPLE_ACQUISITION_DATE":"1998-05-28","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1291","geometry":{"type":"Point","coordinates":[133.12185199,-22.52539833]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1291,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1576571","IGSN":"10273/AU1576571","SAMPLENO":1576571,"SAMPLE_ID":"2001082058","AGE_MA":1790,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.6,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4068","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"A lithology assigned as metamorphosed Lander Package was sampled where psammitic and pelitic granulites contain garnet- and cordierite-bearing partial melt segregations.  Structureless pods of metabasite are also present. During analysis, metamorphic zircon rims were avoided, and probing was targetted at  zircon cores representing the original detrital zircon content of the metasediment.  The resulting age spectrum is dominated by detrital ages in the range 1840-1880 Ma, with a subordinate presence of older populations to ca. 2700 Ma.  It  is clearly similar to the provenance spectrum in unmetamorphosed Lander Rock Formation elsewhere and supports the lithologically-based correlation that has been made previously. This dataset is, however, partially compromised by the difficulty of distinguishing inherited from metamorphic zircon ages in a granulite grade metasediment.  Four analyses targetted within zircon cores are not different from other anlyses in compositional indicators such as Th/U ratio, but their ages are distinctly young in the range from 1763 ± 6 Ma (¿) to 1800 ± 11 Ma (¿).  If accepted as original detrital ages these would indicate deposition after the 1800-1820 Ma Stafford Event, whereas unmetamorphosed Lander Rock Formation were deposited before the Stafford Event.  The possibility that these four analyses include a cryptic component of metamorphic alteration cannot be ruled out.  If these four young ages are disregarded, the maximum deposition age of the sample is consistent with a correlation to the Lander Rock Formation. ","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"metasedimentary rock","SAMPLING_FEATURE_NAME":"2001082058","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS127334","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.5253983271,"LONG_GDA94":133.1218519887,"ELEV_M_AHD":684,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64737","AGE_REF":"Claoue-Long, J.C., Edgoose, C., Worden, K., 2008. A correlation of Aileron Province stratigraphy in central Australia. Precambrian Research, 166(1-4), 230-245.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2007.06.022","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14785","geometry":{"type":"Point","coordinates":[141.54306149,-32.10222196]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14785,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1566783","IGSN":"10273/AU1566783","SAMPLENO":1566783,"SAMPLE_ID":"96180040","AGE_MA":500,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphic conversion of primary magmatic baddeleyite to polycrystalline zircon during the Delamerian Orogeny.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Analyses collected in a single session on ANU SHRIMP II. MSWD not specified.","AGE_SOURCE":"Original publication","PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":31393,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU31393","STRAT_UNIT_NAME":"Little Broken Hill Gabbro","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Gairdner Dyke Swarm","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Wingate et al. (1998): Surface samples were collected from several mafic intrusions in the eastern Willyama Inlier; a medium- to coarse-grained gabbro from Little Broken Hill at Huonville contained zircon and baddeleyite. The sample is igneous-textured, but is extensively uralitized and in thin section comprises approximately equal parts of secondary amphibole and distinctively brown plagioclase. Primary pyroxene (noted in other samples, Stroud et al., 1983) and plagioclase are wholly or partially replaced by a metamorphic assemblage of colourless to blue–green biotite, quartz, titanite, chlorite and clinozoisite. Accessory minerals include apatite, magnetite and pyrite. More than 100 subhedral to euhedral zircons were separated from 600 g of sample. They range in size up to ~200 um and most are clear, colourless, and free of inclusions. Cathodoluminescence imaging reveals few internal structures; a small minority display euhedral growth zones. The sample also yielded ~10 anhedral to subhedral brownish, translucent grains with darker cores. In cathodoluminescence images, the thick rims luminesce weakly, while the cores remain dark. Using the SEM in energy-dispersive mode, the cores were shown to be baddeleyite and the overgrowths to consist of polycrystalline zircon.","SAMPLING_FEATURE_NAME":"96180040","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS94743","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.1022219612,"LONG_GDA94":141.5430614863,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Western margin of Little Broken Hill gabbro: Huonville","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Gibson, G.M.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"62664","AGE_REF":"Wingate, M.T.D., Campbell, I.H., Compston, W., Gibson, G.M., 1998. Ion microprobe U-Pb ages for Neoproterozoic basaltic magmatism in south-central Australia and implications for the breakup of Rodinia. Precambrian Research, 87, 135-159.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0301-9268(97)00072-7","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13953","geometry":{"type":"Point","coordinates":[116.46273407,-30.4651427]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13953,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1568565","IGSN":"10273/AU1568565","SAMPLENO":1568565,"SAMPLE_ID":"99967082C","AGE_MA":2747,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The data are all concordant and have very low common-Pb contamination. The data fall into three distinct groups: a cluster of 16 at ~2940 Ma, several at ~2900 Ma and a group of four at ~2750 Ma. All of these groups show scatter in excess of experimental uncertainties.  The titanite date is distinct from all the zircon data groups. The 2940 +/-5 Ma zircon age is probably the magmatic age if the granitoid from which the xenolith was derived and the titanite age of 2619 +/-8 Ma is considered to be the age of the granitoid in which it now sits. It is not clear whether the intermediate zircon dates represent discrete events experienced by the xenolith; they could represent partial resetting of 2940 Ma zircons at 2619 Ma, although the clustering suggests discrete events.  U/Pb scatter (1sigma) for cz3 standard = 1.41% (n = 15).","AGE_SOURCE":"OZCHRON/publication","PROJECT":"Yilgarn NGMA Project","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed gneiss xenolith - Dookaling","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":"xenolith","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample is from a large xenolith of strongly feldspar-porphyroblastic medium-grained biotite augen gneiss within a relatively homogeneous fine-grained biotite granite. Other xenoliths of banded granitic gneiss. Biotite granite also contains biotite-rich clots and schlieren. All rocks cut by minor pegmatites and rare quartz veins.","SAMPLING_FEATURE_NAME":"99967082","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS105158","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Murchison Province","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Yilgarn Region","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-30.4651427011,"LONG_GDA94":116.4627340702,"ELEV_M_AHD":331,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Drilled and hammered from blasted rock 50 m south of road.","SAMPLE_ACQUISITION_DATE":"1999-04-13","SAMPLE_ORIGINATOR":"Cassidy, K.F.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7987","AGE_REF":"Fletcher, I.R., McNaughton, N.J., 2001. Granitoid geochronology: SHRIMP zircon and titanite data. In: Characterisation and metallogenic significance of Archaean granitoids of the Yilgarn Craton, Western Australia. AMIRA Project P482/MERIWA Project M281. MERIWA Report 222, Chapter 6, 6.1-6.158.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/11/ReportNumber/222","AGE_ENTRY_DATE":"2024-02-08","AGE_LAST_UPDATED":"2024-02-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1261","geometry":{"type":"Point","coordinates":[132.76653057,-22.22672327]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1261,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1573487","IGSN":"10273/AU1573487","SAMPLENO":1573487,"SAMPLE_ID":"2001082048","AGE_MA":1723,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.78,"NUMBER_OF_ANALYSES":22,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":" Z4063","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mendip Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"sandstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"sandstone","SAMPLING_FEATURE_NAME":"2001082048","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS127322","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.2267232721,"LONG_GDA94":132.7665305741,"ELEV_M_AHD":763,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"61208","AGE_REF":"Maidment, D.W., Hand, M., Williams, I.S., 2005. Tectonic cycles in the Strangways Metamorphic Complex, Arunta Inlier, central Australia: geochronological evidence for exhumation and basin formation between two high-grade metamorphic events. 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Record, 2003/15, 139p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/41817","AGE_ENTRY_DATE":"2024-02-10","AGE_LAST_UPDATED":"2024-02-10"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7350","geometry":{"type":"Point","coordinates":[115.96142288,-26.54801201]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7350,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1547892","IGSN":"10273/AU1547892","SAMPLENO":1547892,"SAMPLE_ID":"105007","AGE_MA":2626,"AGE_MA_UNCERTAINTY":1,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.46,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"A U-Pb zircon date of 2636 +/- 4 Ma determined for this sample (Nelson, 1997) was interpreted as the igneous crystallization age of the granitic protolith to this gneiss. This is within error of the date of 2639 +/- 1 Ma indicated by the two monazite analyses of Group 2, raising the possibility that all monazite grains in this sample may have crystallized at the time of igneous crystallization, but were subsequently largely recrystallized during metamorphism at 2626 Ma.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":13916,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13916","STRAT_UNIT_NAME":"Narryer Gneiss Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Narryer Gneiss Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Leucocratic orthogneiss","SAMPLING_FEATURE_NAME":"105007","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS94744","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Western Gneiss Terrane","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.5480120097,"LONG_GDA94":115.9614228837,"ELEV_M_AHD":318,"ACCURACY_M":50,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Leucocratic orthogneiss, Churla Well","SAMPLE_ACQUISITION_DATE":"1994-11-25","SAMPLE_ORIGINATOR":"Nelson, D.R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Nelson, DR 1999, 105007: leucocratic orthogneiss, Churla Well; Geochronology Record 14: Geological Survey of Western Australia, 4p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/105007.3.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14010","geometry":{"type":"Point","coordinates":[120.61196816,-28.90390372]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14010,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1569279","IGSN":"10273/AU1569279","SAMPLENO":1569279,"SAMPLE_ID":"2001969053C","AGE_MA":2670,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.07,"NUMBER_OF_ANALYSES":32,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3878","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Very low-Th metamorphic zircon","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":"Yilgarn NGMA Project","STRATNO":74313,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74313","STRAT_UNIT_NAME":"granite gneiss - high-Ca type 74313","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"banded biotite granitic gneiss, Turkey Well","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"banded bt gneiss","SAMPLING_FEATURE_NAME":"2001969053","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS123565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Eastern Goldfields Province,Yilgarn Craton","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Yilgarn Region","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-28.9039037193,"LONG_GDA94":120.6119681597,"ELEV_M_AHD":423,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"right beside fence line","SAMPLE_ACQUISITION_DATE":"2001-05-20","SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"50431","AGE_REF":"Dunphy, J.M., Fletcher, I.R., Cassidy, K.F., Champion, D.C., 2003. 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(2005, Econ Geol, p. 633) paraphrased: \"In the Farmcote area, about 30 km east-southeast of Broken Hill, substantial bodies of leucogneiss interlayered with amphibolite appear to intrude a metasedimentary sequence interpreted by Stevens and Corbett (1993) as the Lady Brassey Formation (lower Thackaringa Group). Farmcote leucogneiss: Two rocks were dated from the leucogneiss intrusion that is interpreted to intrude the lower part of the Thackaringa Group near Farmcote.\"","SAMPLING_FEATURE_NAME":"98185034","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS98260","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":"Broken Hill Region","STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.0604736513,"LONG_GDA94":141.747298839,"ELEV_M_AHD":213,"ACCURACY_M":100,"LOCATION_METHOD":"1:25 000 map","LOCATION_DESC":"Farmcote station. [Page et al. (2005, Economic Geology 100, 633-661) listed the location of this site as AMG66 Zone 54, 570450 mE, 6452430 mN.]","SAMPLE_ACQUISITION_DATE":"1998-05-28","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"62536","AGE_REF":"Page, R.W., Stevens, B.P.J., Gibson, G.M., 2005. Geochronology of the Sequence Hosting the Broken Hill Pb-Zn-Ag Orebody, Australia. Economic Geology, 100, 633-661.","AGE_PUBLICATION_LINKS":"https://doi.org/10.2113/gsecongeo.100.4.633","AGE_ENTRY_DATE":"2021-09-28","AGE_LAST_UPDATED":"2024-02-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13672","geometry":{"type":"Point","coordinates":[140.03046601,-32.23865101]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13672,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1540606","IGSN":"10273/AU1540606","SAMPLENO":1540606,"SAMPLE_ID":"R480536","AGE_MA":1582,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"none","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"probability frequency maximum","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3210","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":79311,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79311","STRAT_UNIT_NAME":"Whey Whey Member","INFORMAL_UNIT_NAME":"Whey Whey Member, Peryhumuck Fm, Ethiudna Subgroup","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"siliciclastic sedimentary rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Grey, coarse-grained muscovite-biotite psammopelitic schist, very deformed, foliated with 5mm-thick, biotite-rich layering. This sample retains a foliated metamorphic texture, modified by retrogressive alteration. Feldspar is moderately abundant, forming anhedral blocky grains of microperthite and twinned albite. Quartz forms anhedral grains. Together the felsic minerals appear to form a more-or-less equigranular coarse-grained granoblastic mosaic. Muscovite forms large plates aligned in the trace of foliation, and pleochroic tan brown to pale yellow biotite flakes also lie in the foliation. Blocky opaque crystals (?magnetite) are sparsely scattered through the rock. Fine-grained sericite is moderately abundant, concentrated in subparallel diffuse bands composed of tiny sericite flakes and larger euhedral pale yellow epidote crystals, with minor ragged sphene grains. This sample may have formed as a feldspathic sandstone, but most primary textures have been destroyed in response to a dynamic regional metamorphic event which generated the medium-grained foliated granoblastic assemblage of K-feldspar + quartz + plagioclase + muscovite + biotite + minor opaques (?magnetite). At a later time, alteration generated fine-grained dense bands subparallel to the foliation, composed of fine-grained sericite+ epidote + trace sphene.","SAMPLING_FEATURE_NAME":"98185007","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS97739","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Willyama Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.2386510057,"LONG_GDA94":140.0304660065,"ELEV_M_AHD":392,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Walparuta area, Olary province","SAMPLE_ACQUISITION_DATE":"1998-05-26","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.425","geometry":{"type":"Point","coordinates":[144.36473563,-18.92088256]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":425,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1519042","IGSN":"10273/AU1519042","SAMPLENO":1519042,"SAMPLE_ID":"94837506","AGE_MA":1552,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8471","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: 24 of the analyses combine to form an age of 1552+-2 Ma. 9 others yield 1563+-3 Ma. Both ages probably date metamorphic events. Five younger grains possibly reflect a still younger metamorphism.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":"North Queensland NGMA project","STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":"Einasleigh Metamorphics/1b","UNIT_NAME_SOURCE":"Einasleigh Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"dacite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartz-plag-hbe-epidote gneiss that was possibly once a dacite.","SAMPLING_FEATURE_NAME":"94837506","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS199331","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.9208825582,"LONG_GDA94":144.364735631,"ELEV_M_AHD":613,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"About 21 km E of Kidston","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Black, L.P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7892","geometry":{"type":"Point","coordinates":[144.1141847,-18.51770588]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7892,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1527784","IGSN":"10273/AU1527784","SAMPLENO":1527784,"SAMPLE_ID":"95836594","AGE_MA":1553,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":35,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"the growth of the sector-zoned zircon, and for the granulite-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"All 38 individual analyses are within error (x2 is 1.40) of an age of 1552.8 ± 3.0 Ma","AGE_REMARK_FROM_SOURCE":"An age of 1553+-3 Ma is obtained for the granulite-grade metamorphism whether all 38 analyses are included, or whether the 3 youngest ones are excluded.","AGE_SOURCE":"GSQ compilation, 2016","PROJECT":"North Queensland NGMA project","STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Einasleigh Metamorphics/A","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"hornblende granulite","SAMPLING_FEATURE_NAME":"95836594","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS208876","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.5177058824,"LONG_GDA94":144.1141847014,"ELEV_M_AHD":450,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Georgetown Inlier. Turpentine Hill","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Knutson, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66800","AGE_REF":"Black, L.P., Gregory, P., Withnall, I.W., Bain, J.H.C., 1998. U-Pb zircon age for the Etheridge Group, Georgetown region, north Queensland: implications for relationship with the Broken Hill and Mt Isa sequences. Australian Journal of Earth Sciences, 45(6), 925-935.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099808728446","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7893","geometry":{"type":"Point","coordinates":[143.96077692,-18.57572698]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7893,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1528007","IGSN":"10273/AU1528007","SAMPLENO":1528007,"SAMPLE_ID":"95836599","AGE_MA":1553,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"two minor overgrowth generations generate rather imprecise data that are best explained in terms of thermal events at 1656 ± 22 Ma and 1516 ± 20 Ma (1σ error limit only for the latter age).","AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: The mafic igneous precursor of this amphibolite crystallised at 1674+-2 Ma. Much metamorphic zircon grew at 1553+-3 Ma, and there is also evidence for another episode of metamorphic zircon growth at about 1656+-22 Ma.","AGE_SOURCE":"GSQ compilation, 2016","PROJECT":"North Queensland NGMA project","STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Einasleigh Metamorphics/A","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"amphibolite","SAMPLING_FEATURE_NAME":"95836599","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS211510","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.5757269771,"LONG_GDA94":143.9607769247,"ELEV_M_AHD":517,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Stockmans Creek","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Knutson, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66800","AGE_REF":"Black, L.P., Gregory, P., Withnall, I.W., Bain, J.H.C., 1998. U-Pb zircon age for the Etheridge Group, Georgetown region, north Queensland: implications for relationship with the Broken Hill and Mt Isa sequences. Australian Journal of Earth Sciences, 45(6), 925-935.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099808728446","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.409","geometry":{"type":"Point","coordinates":[139.87924465,-21.14919735]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":409,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1517864","IGSN":"10273/AU1517864","SAMPLENO":1517864,"SAMPLE_ID":"96208082","AGE_MA":1520,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":25,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z2638","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: This precise zircon crystallisation age is a good stratigraphic age for the unit. It is based on 18 of the 20 data points, two discordant grains (32, 37) deleted. Metamorphic zircons give 1520+/-2 Ma - a reliable metamorphic age in this metavolcanic rock.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":4727,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4727","STRAT_UNIT_NAME":"Corella Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Corella Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid volcanic rock","LITHOLOGY":"rhyolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"rhyolite","SAMPLING_FEATURE_NAME":"96208082","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS89974","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.1491973482,"LONG_GDA94":139.879244646,"ELEV_M_AHD":383,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"8 km northeast of Mt Hope mine","SAMPLE_ACQUISITION_DATE":"1996-07-06","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Unpublished data (RW Page) in Geoscience Australias OZCHRON database. Mentioned in Neumann and Fraser 2007 http://pid.geoscience.gov.au/dataset/ga/65244","AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1216","geometry":{"type":"Point","coordinates":[133.0097615,-22.27061751]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1216,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1526919","IGSN":"10273/AU1526919","SAMPLENO":1526919,"SAMPLE_ID":"95090003","AGE_MA":1588,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8496","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Original Comment: This is the age of high-grade metamorphism and charnockite emplacement. Rare high-U prismatic grains have an age of 1588+/-5 Ma and reflect a younger metamorphic event or pegmatite intrusion. One xenocryst is 1863 Ma old.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":26321,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26321","STRAT_UNIT_NAME":"Possum Creek Charnockite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Possum Creek Charnockite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"charnockite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"charnockite","SAMPLING_FEATURE_NAME":"95090003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS206671","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.2706175147,"LONG_GDA94":133.0097614994,"ELEV_M_AHD":655,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Collins, W.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7838","AGE_REF":"Collins, W.J., Williams, I.S., 1995. SHRIMP ionprobe dating of short-lived Proterozoic tectonic cycles in the northern Arunta Inlier, central Australia. Precambrian Research, 71, 69-89.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/0301-9268(94)00056-W","AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1218","geometry":{"type":"Point","coordinates":[133.03673121,-22.49218878]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1218,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1526921","IGSN":"10273/AU1526921","SAMPLENO":1526921,"SAMPLE_ID":"95090004","AGE_MA":1587,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.63,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8497","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Original Comment: This is the emplacement age of the gneiss granitic precursor from zircon cores. Overgrowths and sless grains are the same age, 1775+/-12 Ma. High-U grains are in two younger groups: 1659+/-6 and 1587+/-6 Ma, younger metc/hydl events.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":27091,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27091","STRAT_UNIT_NAME":"Napperby Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Napperby Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartzo-feldspathic gneiss","SAMPLING_FEATURE_NAME":"95090004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS206673","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.492188781,"LONG_GDA94":133.0367312099,"ELEV_M_AHD":725,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Collins, W.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7838","AGE_REF":"Collins, W.J., Williams, I.S., 1995. SHRIMP ionprobe dating of short-lived Proterozoic tectonic cycles in the northern Arunta Inlier, central Australia. Precambrian Research, 71, 69-89.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/0301-9268(94)00056-W","AGE_ENTRY_DATE":"2011-08-25","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9569","geometry":{"type":"Point","coordinates":[146.24393804,-41.20954441]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9569,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1537890","IGSN":"10273/AU1537890","SAMPLENO":1537890,"SAMPLE_ID":"95220020","AGE_MA":514.1,"AGE_MA_UNCERTAINTY":4.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.84,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"Z2559","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"high-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: 19 of 23 rims yield an age of 514.1+-4.6 Ma, which is interpreted as dating partial melting during regional metamorphism. Ages are based on the QGNG Standard.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":6836,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6836","STRAT_UNIT_NAME":"Forth Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Garnet amphibolite from the Forth Metamorphic Complex, about 3 km to the S of Forth.","SAMPLING_FEATURE_NAME":"95220020","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS212492","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Sheffield Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.2095444128,"LONG_GDA94":146.2439380379,"ELEV_M_AHD":11,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"NW Tasmania. Wilmot Road, ~3 km S of Forth.","SAMPLE_ACQUISITION_DATE":"1995-11-19","SAMPLE_ORIGINATOR":"Mineral Resources Tasmania (MRT)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"22668","AGE_REF":"Black, L.P., Seymour, D.B., Corbett, K.D., Cox, S.E., Streit, J.E., Bottrill, R.S., Calver, C.R., Everard, J.L., Green, G.R., McClenaghan, M.P., Pemberton, J., Taheri, J., Turner, N.J., 1997. Dating Tasmania's oldest geological events. Australian Geological Survey Organisation. Record, 1997/15, 57p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/23167","AGE_ENTRY_DATE":"2021-06-16","AGE_LAST_UPDATED":"2022-12-09"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13668","geometry":{"type":"Point","coordinates":[140.30404695,-32.1141925]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13668,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1540706","IGSN":"10273/AU1540706","SAMPLENO":1540706,"SAMPLE_ID":"R480552","AGE_MA":1602,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4427","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism (single zircon rim analysis).","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"Broken Hill Exploration Inititive (BHEI)","STRATNO":2617,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU2617","STRAT_UNIT_NAME":"Broken Hill Group","INFORMAL_UNIT_NAME":"top of Quartzofeldspathic unit","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid volcanic rock","LITHOLOGY":"acid volcanic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stratigraphic unit inferred from 1:1M scale Surface Geology of Australia GIS dataset","SAMPLING_FEATURE_NAME":"98185024","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS98249","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1141924963,"LONG_GDA94":140.3040469539,"ELEV_M_AHD":323,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mulga Bore","SAMPLE_ACQUISITION_DATE":"1998-05-28","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-24","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13984","geometry":{"type":"Point","coordinates":[121.70490633,-32.35670439]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13984,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1543751","IGSN":"10273/AU1543751","SAMPLENO":1543751,"SAMPLE_ID":"97969212","AGE_MA":2631,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The U-contents of average ~100 ppm and corrections for common Pb are generally small. The data form a relatively tight group, with almost all grains being concordant. Three analyses with 4f206>3% are omitted, as is one which is significantly discordant. The remaining 24 analyses have a chi^2 = 0.94 and are considered to be a single age population at 2631+/-Ma.  The titanite records a significant event which is not seen at all in the zircon data. It is therefore most likely recording a metamorphic event, and is interpreted to be the time of gneiss formation from a granitic protolith whose minimum magmatic age is ~2685 Ma, as recorded by the zircons.  U/Pb scatter (1sigma) for Khan standard = 0.64% (n = 6) and 1.75% (n = 7). Common-Pb corrected using Cumming & Richards (1975) Model III @ 2640 Ma. Th-related data are considered unreliable for Th <~10 ppm.","AGE_SOURCE":"OZCHRON/publication","PROJECT":"Yilgarn NGMA Project","STRATNO":74292,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74292","STRAT_UNIT_NAME":"felsic intrusives 74292","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"pluton","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"foliated fine-medium amphibole?-biotite granite, mapped as Ag","SAMPLING_FEATURE_NAME":"97969212","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS97245","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Yilgarn Craton","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Yilgarn Region","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-32.3567043875,"LONG_GDA94":121.7049063268,"ELEV_M_AHD":267,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"blasted boulder west of railway line","SAMPLE_ACQUISITION_DATE":"1997-10-12","SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7987","AGE_REF":"Fletcher, I.R., McNaughton, N.J., 2001. Granitoid geochronology: SHRIMP zircon and titanite data. In: Characterisation and metallogenic significance of Archaean granitoids of the Yilgarn Craton, Western Australia. AMIRA Project P482/MERIWA Project M281. MERIWA Report 222, Chapter 6, 6.1-6.158.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/11/ReportNumber/222","AGE_ENTRY_DATE":"2024-02-08","AGE_LAST_UPDATED":"2024-02-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3584","geometry":{"type":"Point","coordinates":[127.91248672,-17.65282057]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3584,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1524576","IGSN":"10273/AU1524576","SAMPLENO":1524576,"SAMPLE_ID":"93525043","AGE_MA":1830,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.97,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8482","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: This is emplacement age of McIntosh intrusion, derived from the U-Pb age of 14 concordant zircons (order 1-14) crystallised in leucosome sweat of country rock. Migmatite (#15-38) has maximum age of 1865+/-2 Ma, and 2250 and 2610 Ma grains.","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed migmatite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Paramigmatite at contact of McIntosh intrusion.","SAMPLING_FEATURE_NAME":"93525043","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS203896","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Halls Creek Orogen","GEOLOGICAL_REGION_NAME":"Halls Creek Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-17.6528205721,"LONG_GDA94":127.912486718,"ELEV_M_AHD":421,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Warren, R.G.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.427","geometry":{"type":"Point","coordinates":[143.94839124,-16.18679907]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":427,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1524662","IGSN":"10273/AU1524662","SAMPLENO":1524662,"SAMPLE_ID":"93836592","AGE_MA":1557,"AGE_MA_UNCERTAINTY":32,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.3,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"GA Geochron Delivery and Original Reference","PROJECT":"North Queensland NGMA project","STRATNO":21488,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21488","STRAT_UNIT_NAME":"Chelmsford Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Yambo Metamorphic Group (STRAT_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"mafic granulite","SAMPLING_FEATURE_NAME":"93836592","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS204078","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Yambo Block","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-16.1867990691,"LONG_GDA94":143.9483912377,"ELEV_M_AHD":205,"ACCURACY_M":200,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Knutson, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66799","AGE_REF":"Blewett, R.S., Black, L.P., Sun Shen-Su, Knutson, J., Hutton, L.J., Bain, J.H.C., 1998. U-Pb zircon and Sm-Nd geochronology of the Mesoproterozoic of North Queensland: implications for a Rodinian connection with the Belt supergroup of North America. Precambrian Research, 89, 101-127.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0301-9268(98)00030-8","AGE_ENTRY_DATE":"2019-07-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7895","geometry":{"type":"Point","coordinates":[139.40786116,-20.72862747]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7895,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1530737","IGSN":"10273/AU1530737","SAMPLENO":1530737,"SAMPLE_ID":"95208067","AGE_MA":1584,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"not captured","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not captured","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: 'Youngest monazite 207/206 age - very preliminary result. Metamorphic age","AGE_SOURCE":"GSQ compilation, 2016","PROJECT":null,"STRATNO":11485,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU11485","STRAT_UNIT_NAME":"May Downs Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"May Downs Gneiss Pegmatite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"pegmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"0.5 metre wide pegmatite dyke","SAMPLING_FEATURE_NAME":"95208067","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS207376","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.7286274654,"LONG_GDA94":139.407861156,"ELEV_M_AHD":390,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"about 8 km west of Mount Isa","SAMPLE_ACQUISITION_DATE":"1995-06-13","SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Unpublished data from Geoscience Australias OZCHRON database. Mentioned in Neumann and Fraser 2007 http://pid.geoscience.gov.au/dataset/ga/65244","AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13930","geometry":{"type":"Point","coordinates":[116.75013065,-30.16288734]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13930,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1545305","IGSN":"10273/AU1545305","SAMPLENO":1545305,"SAMPLE_ID":"99969093B","AGE_MA":2632,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":21,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The U abundances are mostly in the range 100 ppm -100 ppm and the common Pb corrections are all small (4f206 <1.0%). The apparent discordance of all data is attributed to the use of a NO2- primary ion beam, and the tight data clustering is taken as confirmation that the samples are concordant. Two data points which are significantly more discordant have been omitted from the age calculation. The remaining 21 analyses form a single age population with chi^2 = 0.85. The corresponding age is 2632+/-6 Ma.  U/Pb scatter (1sigma) for Khan standard = 1.36% (n = 13). Common-Pb corrected using Cumming & Richards (1975) Model III @ 2620 Ma. # Analysed using NO2- primary ion beam.    Pb/U calibration might be slightly disturbed.    Th/U calibration is not reliable;  Th abundances are indicative only, and Pb/Th are not reported.","AGE_SOURCE":"OZCHRON/publication","PROJECT":"Yilgarn NGMA Project","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Coolangatta granodiorite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":"gneissic band","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Nebulitic to banded medium-grained biotite granodiorite gneiss. Bands of biotite-rich and more felsic granitic gneiss as well as other bands of more mafic (ex-amphibolite?) material (originally dykes?). Several generations of pegmatites, including some that are folded, as well as minor aplites.","SAMPLING_FEATURE_NAME":"99969093","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS105076","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Southern Cross Province","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Yilgarn Region","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-30.1628873449,"LONG_GDA94":116.750130649,"ELEV_M_AHD":349,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Drilled and hammered from a very small facing-stone quarry in the middle of a wheat paddock","SAMPLE_ACQUISITION_DATE":"1999-04-13","SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7987","AGE_REF":"Fletcher, I.R., McNaughton, N.J., 2001. Granitoid geochronology: SHRIMP zircon and titanite data. In: Characterisation and metallogenic significance of Archaean granitoids of the Yilgarn Craton, Western Australia. AMIRA Project P482/MERIWA Project M281. MERIWA Report 222, Chapter 6, 6.1-6.158.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/11/ReportNumber/222","AGE_ENTRY_DATE":"2024-02-08","AGE_LAST_UPDATED":"2024-02-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.420","geometry":{"type":"Point","coordinates":[143.48462313,-14.34886136]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":420,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1519020","IGSN":"10273/AU1519020","SAMPLENO":1519020,"SAMPLE_ID":"93836593","AGE_MA":416,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8470","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Data migrated from OZCHRON1. Original comment: 17 of the 22 Precambrian ages combine to yield an age of 1564+-12 Ma, which probably represents the age of the precursor of this gneiss. The rock has experienced profound isotopic resetting and/or new zircon growth at ~416+-6 Ma (12 analyses).","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":"North Queensland NGMA project","STRATNO":14068,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU14068","STRAT_UNIT_NAME":"Newberry Metamorphic Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Newberry Metamorphic Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"felsic gneiss","SAMPLING_FEATURE_NAME":"93836593","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS199310","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Subprovince","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-14.3488613587,"LONG_GDA94":143.4846231347,"ELEV_M_AHD":130,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Eel Creek near Mount Newberry","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Bultitude, R.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Unpublished data (LP Black) in Geoscience Australias OZCHRON database. 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Overgrowths and sless grains are the same age, 1775+/-12 Ma. 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The date of 3366 +/- 10 Ma (1 sigma error), provides a tentative younger maximum time constraint for this metamorphism.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":68674,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU68674","STRAT_UNIT_NAME":"Callina Supersuite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Warrawagine Granitoid Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"strongly deformed, grey and white banded biotite tonalite gneiss","SAMPLING_FEATURE_NAME":"142870","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS109346","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Pilbara Craton","GEOLOGICAL_REGION_NAME":"Pilbara Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-20.8114403391,"LONG_GDA94":120.5688310256,"ELEV_M_AHD":165,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"0.5 m diameter boulder on N side of small hill, 3m N of 142869.. 4.1km bearing 285, 6 Mile Well &~1km NW Telfer-Woodie Woodie Rd.","SAMPLE_ACQUISITION_DATE":"1997-08-30","SAMPLE_ORIGINATOR":"Nelson, D.R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Nelson, DR 1999, 142870: banded biotite tonalite gneiss, 6 Mile Well; Geochronology Record 345: Geological Survey of Western Australia, 4p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/142870.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1633","geometry":{"type":"Point","coordinates":[133.154052,-12.23017]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1633,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1584947","IGSN":"10273/AU1584947","SAMPLENO":1584947,"SAMPLE_ID":"2003082618","AGE_MA":2473,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.19,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Two analyses were discovered to have duplicate names during OZCHRON data entry (C34.2). The zircon analysed second was renamed C54.1.","AGE_SOURCE":"NTGS STRIKE and Original Reference","PROJECT":"North Australian Craton","STRATNO":25343,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU25343","STRAT_UNIT_NAME":"Nimbuwah Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Felsic Gneiss, Unnamed","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Felsic intrusive or possible high grade meta-sediment","SAMPLING_FEATURE_NAME":"DDH TP11","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH132141","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.23017,"LONG_GDA94":133.154052,"ELEV_M_AHD":58,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69933","AGE_REF":"Worden, K.E., Claoue-Long, J.C., Scrimgeour, I.R., Doyle, N., 2006. 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SHRIMP U-Pb geochronology of Arunta Province samples from the Mount Liebig and Lake Mackay 1:250 000 mapsheets. 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Summary of results. Joint NTGS-GA geochronology project: northern Arunta and Tanami regions, 2000-2003. Northern Territory Geological Survey Record, 2005-003, 69p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82432","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1427","geometry":{"type":"Point","coordinates":[133.11740441,-22.49134652]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1427,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1596510","IGSN":"10273/AU1596510","SAMPLENO":1596510,"SAMPLE_ID":"R494-22","AGE_MA":1594,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Williams and Collins (1996) interpret this 1594 +/- 6 Ma, zircon overgrowth age to represent the peak of granulite facies metamorphism in the Reynolds Range. The 1812 +/- 11 Ma age is a maximum deposition age for the pelite.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":16061,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16061","STRAT_UNIT_NAME":"Reynolds Range Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Reynolds Range Group/Pine Hill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"meta pelite","SAMPLING_FEATURE_NAME":"2001088008","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121921","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4913465176,"LONG_GDA94":133.1174044085,"ELEV_M_AHD":722,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Reynolds Range","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7841","AGE_REF":"Williams, I.S., Buick, I.S., Cartwright, I., 1996. An extended episode of early Mesoproterozoic metamorphic fluid flow in the Reynolds Range, central Australia \t\t. Journal of Metamorphic Geology, 14(1), 29-47.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00029.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1428","geometry":{"type":"Point","coordinates":[133.11740441,-22.49134652]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1428,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1596510","IGSN":"10273/AU1596510","SAMPLENO":1596510,"SAMPLE_ID":"R494-22","AGE_MA":1576,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Closure (cooling) of monazite after granulite event","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":16061,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16061","STRAT_UNIT_NAME":"Reynolds Range Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Reynolds Range Group/Pine Hill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"meta pelite","SAMPLING_FEATURE_NAME":"2001088008","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121921","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4913465176,"LONG_GDA94":133.1174044085,"ELEV_M_AHD":722,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Reynolds Range","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7841","AGE_REF":"Williams, I.S., Buick, I.S., Cartwright, I., 1996. An extended episode of early Mesoproterozoic metamorphic fluid flow in the Reynolds Range, central Australia \t\t. Journal of Metamorphic Geology, 14(1), 29-47.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00029.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1401","geometry":{"type":"Point","coordinates":[133.09259941,-22.45764212]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1401,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1594980","IGSN":"10273/AU1594980","SAMPLENO":1594980,"SAMPLE_ID":"X524","AGE_MA":1583,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Vry et al. (1996) interpret this ~1580 Ma age to represent the timing of a granulite facies metamorphic event in the south-east part of the Reynolds range.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartz metasedimentary rock","SAMPLING_FEATURE_NAME":"2001088002","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121872","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4576421174,"LONG_GDA94":133.0925994094,"ELEV_M_AHD":683,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7824","AGE_REF":"Vry, J., Compston, W., Cartwright, I., 1996. SHRIMP II dating of zircons and monazites: Reassessing the timing of high-grade metamorphism and fluid flow in the Reynolds Range, northern Arunta Block, Australia. Journal of Metamorphic Geology, 14(3), 335-350.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00335.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1357","geometry":{"type":"Point","coordinates":[131.6062489,-22.19696943]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1357,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1585625","IGSN":"10273/AU1585625","SAMPLENO":1585625,"SAMPLE_ID":"2001082040","AGE_MA":1803,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3971","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"the outcrop lithologies are alternating metapelites and metapsammites in which the metapelites show evidence of partial melting but the more refractory metapsammites do not contain leucosomes and retain some semblance of original gross bedding.  Zircons in a sample of psammite were studied to see if there is any differences in provenance pattern and/or metamorphic zircon isotope systematics between the two lithologies. Zircons in this rock, as in the other samples, are a heterogeneous range of detrital grains and these were probed at random to obtain a detrital provenance age spectrum.  There is also a distinctive new population of ovoid, multifacetted zircons of metamorphic form, not found in the metapelite, and these were analysed separately.  Only 35 analyses of the detrital grains were obtained so this is only a partial provenance spectrum, but the equivalence of the spectrum to the other samples is evident.  There is a sparse presence of Archaean grains, and the same increasing abundance towards younger Proterozoic ages.  The youngest individual detrital grain is 1834 ± 28 Ma (2¿).  Alternatively, a statistically defined grouping of the 13 youngest grains has an acceptable MSWD of 1.3 and an average age of 1855 ± 7 Ma (2¿). In detail, the young end of the provenance spectrum in the metapsammite is similar to that of the low grade Lander Rock Formation sandstone , but different from both the granite and the metapelite.  The granite and the metapelite both have a significant presence of heterogeneous zircons with ages younger than ca. 1850 Ma, which is not found in the two sandstone lithologies.  Instead, the metapsammite has a optically distinctive and homogeneous population of metamorphic zircons.  Eleven of these were probed (Figure 9b) and they reproduce with acceptable MSWD of 1.6 a mean 207Pb/206Pb age of 1803 ± 6 Ma (2¿).","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"sandstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"sandstone","SAMPLING_FEATURE_NAME":"2001082040","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS127314","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.1969694287,"LONG_GDA94":131.6062488957,"ELEV_M_AHD":673,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"200m SE of Ngadarunga granite","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64736","AGE_REF":"Claoue-Long, J.C., Edgoose, C., 2008. The age and significance of the Ngadarunga Granite in Proterozoic central Australia. Precambrian Research, 166(1-4), 219-229.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2007.06.026","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1423","geometry":{"type":"Point","coordinates":[131.01694659,-23.49074739]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1423,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1596491","IGSN":"10273/AU1596491","SAMPLENO":1596491,"SAMPLE_ID":"2000082002","AGE_MA":1594,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3674","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Recording Chewings Orogeny","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":41854,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU41854","STRAT_UNIT_NAME":"Udor Granite","INFORMAL_UNIT_NAME":"Winbarku Suite","UNIT_NAME_SOURCE":"Udor Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stratigraphic unit inferred from 1:1M scale Surface Geology of Australia GIS dataset","SAMPLING_FEATURE_NAME":"2000082002","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS120566","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.4907473876,"LONG_GDA94":131.01694659,"ELEV_M_AHD":702,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66861","AGE_REF":"Cross, A.J., Claoue-Long, J.C., Scrimgeour, I.R., Close, D.F., Edgoose, C.J., 2005. Summary of results. Joint NTGS-GA geochronology project: southern Arunta Region. Northern Territory Geological Survey Record, 2004-003, 61p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82424","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1379","geometry":{"type":"Point","coordinates":[134.027665,-23.006813]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1379,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1588923","IGSN":"10273/AU1588923","SAMPLENO":1588923,"SAMPLE_ID":"2001087073B","AGE_MA":1716,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.1,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3974","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Zircons in the sample exhibit relatively uniform appearance in light microscope images.  In external form they are slightly elongate (length: breadth ratios of 2-3) with ovoid multifacetted shapes consistent with metamorphic zircon.  They appear internally homogeneous, but CL imaging in Figure 1 reveals that nearly all grains have a 2-layer structure with a brightly luminescent core and a thick, darkly luminescent overgrowth.  The cores are uniform in appearance, all having oscillatory growth zoning typical of igneous zircon growth, and broken euhedral shapes preserving elements of the original prismatic facetting.  The broken cores are overgrown and in some cases embayed by the later growth whose dark luminescence indicates high uranium and whose multifacetted external shape is consistent with metamorphic crystallisation.  All of the compositions are concordant or near-concordant, indicating minimal isotopic disturbance, and the data fall into distinct age groups.  Twenty-seven individual analyses of the zircon cores are all within error of a weighted mean 207Pb/206Pb age of 1802.4 ? 4.8 Ma (95% confidence) with an acceptable Mean Square of Weighted Deviates (MSWD) of 1.3.  Fewer overgrowths were successfully targetted because placement of the beam without overlapping cores was difficult, but 14 individual analyses of the rims all agree within error at a weighted mean 207Pb/206Pb age of 1716.1 ? 3.2 Ma (95% confidence) with an acceptable MSWD of 1.07.   As indicated by their CL luminescence responses, the different zones are chemically different, with the cores having moderate Th/U ratios from 0.4-0.9 typical of igneous zircons, and the rims having extremely low Th/U ratios below 0.1 which is typical of metamorphic zircon and usually attributed to metamorphic zircon growth in the presence of monazite which scavenges available Th into its structure.   Together with the morphological and chemical constraints, the data are consistent with the unit having a protolith age of 1802.4 ? 4.8 Ma.  The single crystallisation age of the cores, and their fractured, prismatic igneous forms, are more consistent with the slight sedimentary reworking of a volcaniclastic than with the heavy grain abrasion and multi-provenance origin expected of a normal clastic sediment.  Subsequent high grade metamorphism caused renewed zircon crystallisation at 1716.1 ? 3.2 Ma.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":20788,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU20788","STRAT_UNIT_NAME":"Yambah Granulite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Yambah Granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Quartz-cordierite-sillimanite-phlogopite gneiss","SAMPLING_FEATURE_NAME":"2001087073","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS126744","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.006813,"LONG_GDA94":134.027665,"ELEV_M_AHD":727,"ACCURACY_M":15,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Edwards Creek prospect","SAMPLE_ACQUISITION_DATE":"2001-08-01","SAMPLE_ORIGINATOR":"Huston, D.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66860","AGE_REF":"Hussey, K., Huston, D.L., Claoue-Long, J.C., 2005. Geology and origin of some Cu-Pb-Zn (Au-Ag) deposits in the Strangways Metamorphic Complex, Arunta Region, Northern Territory. Northern Territory Geological Survey, Report, 17, 102p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/81553","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1435","geometry":{"type":"Point","coordinates":[131.84940057,-23.39042524]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1435,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1597220","IGSN":"10273/AU1597220","SAMPLENO":1597220,"SAMPLE_ID":"2000082008","AGE_MA":1661,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.47,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3676","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Granite intruding Ikuntji metamorphics","UNIT_NAME_SOURCE":"Glen Helen Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"-[informal_name: Granite intruding Ikuntji metamorphics]-","SAMPLING_FEATURE_NAME":"2000082008","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS120573","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.3904252423,"LONG_GDA94":131.8494005721,"ELEV_M_AHD":722,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66861","AGE_REF":"Cross, A.J., Claoue-Long, J.C., Scrimgeour, I.R., Close, D.F., Edgoose, C.J., 2005. Summary of results. Joint NTGS-GA geochronology project: southern Arunta Region. Northern Territory Geological Survey Record, 2004-003, 61p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82424","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1461","geometry":{"type":"Point","coordinates":[135.36920177,-24.12061681]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1461,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1924320","IGSN":"10273/AU1924320","SAMPLENO":1924320,"SAMPLE_ID":"HA05IRS052","AGE_MA":1768,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.99,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6020","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Metasedimentary Rock, Casey Inlier","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Biotite-bearing quarto-feldspathic migmatite, minor garnet, with layer parallel qtz-ksp leucosomes. Informal unit.","SAMPLING_FEATURE_NAME":"HA05IRS052","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS407731","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Amadeus Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-24.1206168071,"LONG_GDA94":135.3692017695,"ELEV_M_AHD":321,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2005-01-18","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8184","geometry":{"type":"Point","coordinates":[117.919746,-33.339295]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8184,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1586823","IGSN":"10273/AU1586823","SAMPLENO":1586823,"SAMPLE_ID":"2003967065","AGE_MA":2645.9,"AGE_MA_UNCERTAINTY":3.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.64,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3582","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"GEOCHRONOLOGICAL INTERPRETATION The age of 2678 ± 6 Ma is interpreted as the igneous age of the protolith to the gneiss. 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(2008, AJES) paraphrased: \"Potosi-type gneiss in the Cues Formation occurs as lenticular bodies up to 20 m thick and 100 m long, generally associated with metabasic rocks. Laing et al. (1984), Laing (1996) and Stevens & Barron (2002) showed that similar Potosi-type gneiss in the Hores Gneiss was volcanic in origin, on the basis of preserved volcanic textures. Although no such textures have yet been documented from Potosi-type gneiss in the Cues Formation, two samples were studied with the aim of at least determining maximum ages for deposition of the Cues Formation succession. (The most likely alternative origin for Potosi-type gneiss is sandstone incorporating some volcanic detritus.) Sample 2002185803, a Potosi-type gneiss from the Old Coolgardie Tank area, is a dark, medium- to fine-grained quartz-feldspar-biotite gneiss with scattered garnets to 4 mm. It was taken from a small body associated with leucogneiss and abundant metabasic rocks, about 180 m west of amphibolite sample 2002185804.\"","SAMPLING_FEATURE_NAME":"2002185803","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129360","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.1182761778,"LONG_GDA94":141.1732560984,"ELEV_M_AHD":294,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"1 km SE of old Coolgardie tank","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. 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The mineral prospect differs from the other volcanic-associated massive sulphide deposits in the Strangways Metamorphic Complex in its lack of extensive zones of quartz-cordierite and associated rocks. Instead, the altered rocks are characterised by biotite-sillimanite-Kfeldspar-quartz-garnet gneisses. These rocks have lower SiO2 contents (51-52%), but higher Al2O3 (~27%), Fe2O3 (~13%) and K2O (3.3%) relative to quartz-cordierite rocks (Hussey et al., 2005). They share the enrichment in MgO and loss of Na2O and CaO. This composition suggests a sericite-chlorite-quartz protolith, which is a common assemblage in such deposits. Zr/TiO2 ratios of ~0.013 indicate a mafic (basaltic) protolith, which, in part, accounts for the lower SiO2 content. The sample studied is a feldspar-quartz-garnet gneiss.","SAMPLING_FEATURE_NAME":"DDH004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620838","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.06054,"LONG_GDA94":133.771589,"ELEV_M_AHD":700,"ACCURACY_M":50,"LOCATION_METHOD":"unpublished report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Hussey, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64738","AGE_REF":"Claoue-Long, J.C., Maidment, D.W., Hussey, K., Huston, D.L., 2008. The duration of the Strangways Event in central Australia: evidence for prolonged deep crust processes. 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The age of magmatic and hydrothermal zircon at Olympic Dam. Geological Society of Australia Abstracts, 110, 254-255.","AGE_PUBLICATION_LINKS":"https://www.researchgate.net/publication/271387404","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1388","geometry":{"type":"Point","coordinates":[133.09547659,-22.46038526]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1388,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1593344","IGSN":"10273/AU1593344","SAMPLENO":1593344,"SAMPLE_ID":"X29","AGE_MA":1579,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"A single analysis (20.1) is interpreted by Vry et al. 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(1996) as mixed ages.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"cordierite metasedimentary rock","SAMPLING_FEATURE_NAME":"2001088004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121875","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4603852562,"LONG_GDA94":133.0954765943,"ELEV_M_AHD":695,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Reynolds Range","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7824","AGE_REF":"Vry, J., Compston, W., Cartwright, I., 1996. SHRIMP II dating of zircons and monazites: Reassessing the timing of high-grade metamorphism and fluid flow in the Reynolds Range, northern Arunta Block, Australia. Journal of Metamorphic Geology, 14(3), 335-350.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00335.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13382","geometry":{"type":"Point","coordinates":[146.860413,-32.562821]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13382,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1580572","IGSN":"10273/AU1580572","SAMPLENO":1580572,"SAMPLE_ID":"TRI91","AGE_MA":421.6,"AGE_MA_UNCERTAINTY":3.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.91,"NUMBER_OF_ANALYSES":29,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":"GA6395","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal activity","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":79848,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79848","STRAT_UNIT_NAME":"Fountaindale Granodiorite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":"pluton","SAMPLE_TYPE":"drill chips/cuttings","SAMPLE_DESC":"The concealed Fountaindale Granodiorite lies about 60 km N of Condobolin. Sample TRI91 comprised 2.79 kg of rock chips from reverse circulation (RC) drillhole TYM063, sampled at 130 m depth (Mackenzie et al., 2004). It comprises medium- to fine-grained (1-2 mm) equigranular biotite-hornblende granodiorite composed of dark biotite, dark grey quartz, and translucent white plagioclase; all indicating relatively fresh rock. Fracture surfaces are coated by thin chlorite with some small pyrite crystals (much less than 1 mm). The magnetic susceptibility is 34 x 10-5 SI units. Blevin (2003b) classified the unit as an oxidised calc-alkaline I-type granite of intermediate character (relatively low-K, and moderately oxidised). This sample was dated by zircon and titanite to understand whether the titanite formed during magmatic crystallisation, or during a later stage of hydrothermal alteration. Blevin (2003b) described a thin-section as a relatively fresh biotite-amphibole granodiorite comprising intricately zoned plagioclase crystals (40%, consisting of calcic cores, oscillatory-zoned mid-sections and sodic rims); blocky, slightly strained quartz (30%); primary biotite (15%) ranging from fresh to completely chloritised; and primary amphibole (5%) largely replaced by birefringent, pleochroic acicular secondary actinolite. Minor gridiron twinned alkali feldspar (10%) is fresh, and paragenetically late. Accessory minerals include magnetite, apatite, zircon and titanite, with the latter forming small primary crystals, as alteration after biotite and amphibole, and as reaction haloes around magmatic opaque phases. Opaque minerals (~1%) are predominantly disseminated euhedral pyrite. Opaque oxides are restricted to biotite, and mostly replaced by titanite. Alteration intensity is variable and deuteric: plagioclase is partially sericitised (sericite, kaolinite), and biotite is chloritised (chlorite, titanite and rutile). Veins of chlorite, carbonate and pyrite are also present.","SAMPLING_FEATURE_NAME":"TYM063","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH628642","BOREHOLE_TOP_DEPTH_M":130,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.562821,"LONG_GDA94":146.860413,"ELEV_M_AHD":246,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Blevin, P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73578","AGE_REF":"Waltenberg, K., Bodorkos, S., Fitzherbert, J.A., Blevin, P.L., 2022. New SHRIMP U-Pb zircon and titanite ages from the Cobar Basin and Lachlan Orogen, New South Wales: Mineral Systems Projects, July 2017-June 2019. Geoscience Australia. Record, 2022/34, 72p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2022.034","AGE_ENTRY_DATE":"2022-09-02","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1327","geometry":{"type":"Point","coordinates":[133.771589,-23.06054]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1327,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1581779","IGSN":"10273/AU1581779","SAMPLENO":1581779,"SAMPLE_ID":"2003087437A","AGE_MA":1731.1,"AGE_MA_UNCERTAINTY":3.1,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":21,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4273","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Two inherited grains at ~1750 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":20788,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU20788","STRAT_UNIT_NAME":"Yambah Granulite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Yambah Granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Coles Hill is at the western extremity of the exposure of high-grade metamorphic rocks in the Strangways Metamorphic Complex, and is poorly exposed. The mineral prospect differs from the other volcanic-associated massive sulphide deposits in the Strangways Metamorphic Complex in its lack of extensive zones of quartz-cordierite and associated rocks. Instead, the altered rocks are characterised by biotite-sillimanite-Kfeldspar-quartz-garnet gneisses. These rocks have lower SiO2 contents (51-52%), but higher Al2O3 (~27%), Fe2O3 (~13%) and K2O (3.3%) relative to quartz-cordierite rocks (Hussey et al., 2005). They share the enrichment in MgO and loss of Na2O and CaO. This composition suggests a sericite-chlorite-quartz protolith, which is a common assemblage in such deposits. Zr/TiO2 ratios of ~0.013 indicate a mafic (basaltic) protolith, which, in part, accounts for the lower SiO2 content. The sample studied is a feldspar-quartz-garnet gneiss.","SAMPLING_FEATURE_NAME":"DDH004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620838","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.06054,"LONG_GDA94":133.771589,"ELEV_M_AHD":700,"ACCURACY_M":50,"LOCATION_METHOD":"unpublished report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Hussey, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64738","AGE_REF":"Claoue-Long, J.C., Maidment, D.W., Hussey, K., Huston, D.L., 2008. The duration of the Strangways Event in central Australia: evidence for prolonged deep crust processes. Precambrian Research, 166(1-4), 246-262.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2007.06.023","AGE_ENTRY_DATE":"2016-11-16","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13697","geometry":{"type":"Point","coordinates":[140.20479503,-32.1401016]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13697,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1573932","IGSN":"10273/AU1573932","SAMPLENO":1573932,"SAMPLE_ID":"R2092258","AGE_MA":1603,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4126","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":29887,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29887","STRAT_UNIT_NAME":"Bimba Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Weakly weathered (jarosite bearing), quartz-plagioclase-mica psammopelitic schist. This sample displays a medium-grained foliated granoblastic metamorphic texture. Clear quartz and twinned plagioclase form an equigranular sutured granoblastic mosaic throughout the rock. Biotite builds well-shaped large flakes that are pleochroic from reddish brown to straw yellow, and their strong preferred orientation defines a strong foliation through the rock. Muscovite forms large plates similar to biotite, aligned in the trace of the foliation, but it also forms smaller flakes as part of the equilibrium assemblage. Scattered through the rock are blocky to anhedral solution cavities (after ?sulphide) which have been lined or completely filled by very fine-grained dense microgranular yellow jarosite. This sample may have formed as a mixed pelitic arenaceous sediment, but all primary textures have been destroyed by recrystallisation in response to a dynamic regional metamorphic event with associated directed stress regime, probably in the amphibolite facies, producing the foliated granoblastic metamorphic assemblage of quartz + plagioclase + biotite + muscovite + ?sulphide. Subsequent weathering generated jarosite after the minor ?sulphide grains.","SAMPLING_FEATURE_NAME":"2002185852","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129388","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1401016005,"LONG_GDA94":140.2047950317,"ELEV_M_AHD":310,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Ameroo Hill area","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9762","geometry":{"type":"Point","coordinates":[141.68243911,-32.19357051]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9762,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578033","IGSN":"10273/AU1578033","SAMPLENO":1578033,"SAMPLE_ID":"2002185814","AGE_MA":1589,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.11,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4120","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":15968,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU15968","STRAT_UNIT_NAME":"Redan Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stevens et al. (2008, AJES) paraphrased: \"A sample (2002185814) of poorly layered quartz-albite-K-feldspar-magnetite gneiss with minor sphene and secondary muscovite was taken from near Love's (1992) BH22 sample site, about 1.5 km northwest of Redan homestead. This poorly layered albitic sample contains a less complex zircon population, with essentially two age populations of zircons: protolith zircons with metamorphic zircon rims, and discrete metamorphic zircon grains.\"","SAMPLING_FEATURE_NAME":"2002185814","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129375","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.1935705107,"LONG_GDA94":141.6824391104,"ELEV_M_AHD":150,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Redan homestead area. 1 km north of Redan homestead (approx. Love's location BH-22).","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. Australian Journal of Earth Sciences, 55(3), 301-330.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701769456","AGE_ENTRY_DATE":"2021-09-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13711","geometry":{"type":"Point","coordinates":[140.18642262,-31.97758121]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13711,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578063","IGSN":"10273/AU1578063","SAMPLENO":1578063,"SAMPLE_ID":"R2092267","AGE_MA":1602,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4121","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":72282,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU72282","STRAT_UNIT_NAME":"Poodla Granite","INFORMAL_UNIT_NAME":"Poodla Hill granite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Foliated sericite-biotite coarse-grained granite. Fractured and pyrite-mineralised. The rock displays a partly-preserved medium-grained granitoid texture, modified by ductile deformation and partial replacement. K-feldspar forms blocky subhedral crystals, associated with anhedral quartz grains: both appear to represent relict primary igneous grains that have been partly elongated in the trace of a structure (foliation). Plagioclase formed subhedral grains, but most have suffered partial to complete replacement by fine-grained sericite and minor biotite. Most biotite forms small pleochroic tan brown flakes concentrated in loose aggregates aligned in the trace of the foliation. Fine-grained sericite also forms dense aggregates aligned in the foliation. Opaques (mainly ?magnetite) form subhedral blocky grains embedded in the biotite aggregates, commonly in association with fine-grained dense aggregates of sphene. Tourmaline is uncommon, forming stumpy subhedral pleochroic drab green grains in biotite aggregates. Zircon is uncommon, forming small euhedral crystals in the interstitial primary quartz grains. This sample formed as a granitoid of broadly granodioritic composition, originally composed of plagioclase, quartz, K-feldspar, ferromagnesians and trace zircon. Ductile deformation and selective pervasive alteration occurred during a dynamic regional metamorphic event, generating new sericite + biotite + opaques (?magnetite) + sphene + trace tourmaline. The primary K-feldspar and quartz, some of the primary plagioclase, and small primary zircon crystals survived this event.","SAMPLING_FEATURE_NAME":"2002185861","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129400","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.9775812091,"LONG_GDA94":140.186422619,"ELEV_M_AHD":274,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Poodla Hill","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9741","geometry":{"type":"Point","coordinates":[140.90163121,-32.29052295]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9741,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1573936","IGSN":"10273/AU1573936","SAMPLENO":1573936,"SAMPLE_ID":"R386340","AGE_MA":1590,"AGE_MA_UNCERTAINTY":16.5,"AGE_CONFIDENCE_LEVEL":"asymmetric 95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"median","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"Z4343","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":8489,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8489","STRAT_UNIT_NAME":"Hores Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample 2002185874 is a medium- to coarse-grained quartz-feldspar-biotite-garnet gneiss from southeast of Mingary, South Australia. The garnet gneisses, interpreted as Hores Gneiss equivalent, occupy the core of an F3 fold formed during the Olarian Orogeny. Shearing in the limbs of the fold has brought the gneiss into contact with upper Thackaringa Group psammites. The SHRIMP U/Pb zircon age of 1684 +/- 6 Ma based on 15 grains confirms the correlation with Hores Gneiss and the presence of upper Broken Hill Group in this part of South Australia.","SAMPLING_FEATURE_NAME":"2002185874","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129414","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.2905229526,"LONG_GDA94":140.9016312137,"ELEV_M_AHD":251,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mutooroo area, SA.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. Australian Journal of Earth Sciences, 55(3), 301-330.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701769456","AGE_ENTRY_DATE":"2021-09-10","AGE_LAST_UPDATED":"2023-06-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9727","geometry":{"type":"Point","coordinates":[141.17508036,-32.11877888]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9727,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578016","IGSN":"10273/AU1578016","SAMPLENO":1578016,"SAMPLE_ID":"2002185804","AGE_MA":1593,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4130","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":26261,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26261","STRAT_UNIT_NAME":"Cues Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stevens et al. (2008, AJES) paraphrased: \"Metabasic rocks occur at several stratigraphic levels in the Cues Formation, and tends to be most abundant in the middle of the formation. The amphibolites are generally concordant and most probably represent metamorphosed and deformed sills (Stevens 1998). Sample 2002185804 is a concordant amphibolite retaining a microdoleritic texture of fine-grained, interlocking feldspar laths, visible in hand specimen. It is one of a number of amphibolite bodies that occur with minor Potosi-type gneiss and leucogneiss in Cues Formation 1 km southeast of Old Coolgardie Tank, near the Triple Chance road.\"","SAMPLING_FEATURE_NAME":"2002185804","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129362","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.1187788803,"LONG_GDA94":141.1750803625,"ELEV_M_AHD":299,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"200 m east of 2002185803","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. Australian Journal of Earth Sciences, 55(3), 301-330.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701769456","AGE_ENTRY_DATE":"2021-08-30","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13704","geometry":{"type":"Point","coordinates":[140.0351181,-32.23694378]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13704,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578079","IGSN":"10273/AU1578079","SAMPLENO":1578079,"SAMPLE_ID":"R2092277","AGE_MA":1587,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"none","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"probability frequency maximum","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4127","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":68095,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU68095","STRAT_UNIT_NAME":"Walparuta Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Thin (30cm) boudinaged layer in unit dominated by layered pelite, psammopelite with occasional psammite layers, locally graded. White, medium grained quartz-feldspar-mica rock,  initially interpreted as metagranite. This sample displays a foliated metamorphic texture with partly preserved precursor coarse framework-supported clastic sedimentary texture. Quartz and plagioclase are abundant. Quartz forms equant rounded to anhedral grains distributed uniformly through the rock. Plagioclase forms smaller anhedral grains that form a granoblastic mosaic between the larger quartz grains, but some plagioclase also forms larger anhedral grains moulded on the quartz grains. Muscovite is moderately abundant, as large plates aligned in the trace of penetrative structure (foliation), and also as smaller flakes sprinkled through the plagioclase mosaic. Biotite mostly forms larger plates, similar to the large muscovite plates, and also contributes to the foliation through the rock. Chlorite forms small well-shaped pleochroic green flakes irregularly scattered through the finer-grained mosaic. This sample is considered to have formed as a coarse arenaceous clastic sediment, originally composed of closely-packed grains of quartz and feldspar, accompanied by a moderate amount of detrital clay materials. Regional metamorphism with accompanying directed stress regime caused moderately strong recrystallisation, generating the weakly foliated granoblastic assemblage of plagioclase + quartz + muscovite + biotite + chlorite. Some of the primary clastic texture was preserved.","SAMPLING_FEATURE_NAME":"2002185871","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129411","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.2369437755,"LONG_GDA94":140.0351180968,"ELEV_M_AHD":384,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"SE Walparuta Inlier","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8192","geometry":{"type":"Point","coordinates":[116.250812,-33.933722]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8192,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1583244","IGSN":"10273/AU1583244","SAMPLENO":1583244,"SAMPLE_ID":"2004967004","AGE_MA":2630,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"none","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"dispersed individuals","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not reported","MINERAL":"Zircon","MOUNT_ID":"Z4437","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"metamorphic event at c 2630 Ma","AGE_SOURCE":"original publication","PROJECT":"Yilgarn NGMA Project","STRATNO":29206,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29206","STRAT_UNIT_NAME":"Gibralter Quartz Monzonite","INFORMAL_UNIT_NAME":"Gibraltor quartz monzonite","UNIT_NAME_SOURCE":"Gibraltor quartz monzonite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"syenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"grey-white to white-pink, lineated, moderately to strongly amphibole-K-feldspar-porphyritic, medium-coarse-grained quartz syenite","SAMPLING_FEATURE_NAME":"2004967004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS135939","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Western Gneiss Terrane","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Southwest Yilgarn","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-33.933722,"LONG_GDA94":116.250812,"ELEV_M_AHD":291,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2004-03-22","SAMPLE_ORIGINATOR":"Cassidy, K.F.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68154","AGE_REF":"Sircombe, K.N., Cassidy, K.F., Champion, D.C., Tripp, G., 2007. Compilation of SHRIMP U-Pb geochronological data Yilgarn Craton, Western Australia, 2004-2006. Geoscience Australia. Record, 2007/01, 182p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/64996","AGE_ENTRY_DATE":"2021-01-21","AGE_LAST_UPDATED":"2021-01-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8195","geometry":{"type":"Point","coordinates":[116.355259,-33.842952]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8195,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1583252","IGSN":"10273/AU1583252","SAMPLENO":1583252,"SAMPLE_ID":"2004967009","AGE_MA":2635,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4438","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-B","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic zircon growth event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"original publication","PROJECT":"Yilgarn NGMA Project","STRATNO":74292,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74292","STRAT_UNIT_NAME":"felsic intrusives 74292","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"biotite granite, Wilyungulup Spring","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"grey, foliated to weakly banded, seriate to sparsely feldspar-porphyritic, medium- to coarse-grained, biotite monzogranite","SAMPLING_FEATURE_NAME":"2004967009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS135945","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Western Gneiss Terrane","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":"Southwest Yilgarn","STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-33.842952,"LONG_GDA94":116.355259,"ELEV_M_AHD":238,"ACCURACY_M":50,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2004-03-24","SAMPLE_ORIGINATOR":"Cassidy, K.F.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68154","AGE_REF":"Sircombe, K.N., Cassidy, K.F., Champion, D.C., Tripp, G., 2007. Compilation of SHRIMP U-Pb geochronological data Yilgarn Craton, Western Australia, 2004-2006. Geoscience Australia. Record, 2007/01, 182p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/64996","AGE_ENTRY_DATE":"2021-01-21","AGE_LAST_UPDATED":"2021-01-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1319","geometry":{"type":"Point","coordinates":[130.899447,-21.70705]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1319,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1581018","IGSN":"10273/AU1581018","SAMPLENO":1581018,"SAMPLE_ID":"2003089502","AGE_MA":1813,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.47,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4429","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Older of two populations determined by inversion of 44 analyses","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds [Metasedimentary Rock]","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Upper amphibolite-granulite facies psammopelite","SAMPLING_FEATURE_NAME":"NA02DDH10R2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH132760","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-21.70705,"LONG_GDA94":130.899447,"ELEV_M_AHD":508,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69933","AGE_REF":"Worden, K.E., Claoue-Long, J.C., Scrimgeour, I.R., Doyle, N., 2006. Summary of results. Joint NTGS-GA geochronology project: Pine Creek Orogen and Arunta Region, January-June 2004. Northern Territory Geological Survey Record, 2006-005, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82439","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1320","geometry":{"type":"Point","coordinates":[130.899447,-21.70705]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1320,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1581018","IGSN":"10273/AU1581018","SAMPLENO":1581018,"SAMPLE_ID":"2003089502","AGE_MA":1794,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.47,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4429","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Younger of two populations determined by inversion of 44 analyses","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Upper amphibolite-granulite facies psammopelite","SAMPLING_FEATURE_NAME":"NA02DDH10R2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH132760","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-21.70705,"LONG_GDA94":130.899447,"ELEV_M_AHD":508,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69933","AGE_REF":"Worden, K.E., Claoue-Long, J.C., Scrimgeour, I.R., Doyle, N., 2006. Summary of results. Joint NTGS-GA geochronology project: Pine Creek Orogen and Arunta Region, January-June 2004. Northern Territory Geological Survey Record, 2006-005, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82439","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9803","geometry":{"type":"Point","coordinates":[140.90163121,-32.29052295]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9803,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1573936","IGSN":"10273/AU1573936","SAMPLENO":1573936,"SAMPLE_ID":"R386340","AGE_MA":1590,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":1.23,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4343","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic in origin","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":8489,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8489","STRAT_UNIT_NAME":"Hores Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample 2002185874 is a medium- to coarse-grained quartz-feldspar-biotite-garnet gneiss from southeast of Mingary, South Australia. The garnet gneisses, interpreted as Hores Gneiss equivalent, occupy the core of an F3 fold formed during the Olarian Orogeny. Shearing in the limbs of the fold has brought the gneiss into contact with upper Thackaringa Group psammites. The SHRIMP U/Pb zircon age of 1684 +/- 6 Ma based on 15 grains confirms the correlation with Hores Gneiss and the presence of upper Broken Hill Group in this part of South Australia.","SAMPLING_FEATURE_NAME":"2002185874","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129414","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.2905229526,"LONG_GDA94":140.9016312137,"ELEV_M_AHD":251,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mutooroo area, SA.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. Australian Journal of Earth Sciences, 55(3), 301-330.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701769456","AGE_ENTRY_DATE":"2021-09-28","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13695","geometry":{"type":"Point","coordinates":[140.20392072,-32.14066444]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13695,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578047","IGSN":"10273/AU1578047","SAMPLENO":1578047,"SAMPLE_ID":"R2092257","AGE_MA":1599,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4126","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":29887,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29887","STRAT_UNIT_NAME":"Bimba Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Weathered, even-grained quartz-feldspar-biotite-muscovite psammopelitic schist. This sample displays a foliated equigranular granoblastic metamorphic texture. K-feldspar (microcline) is abundant, forming equant anhedral grains in a granoblastic mosaic throughout the rock. Biotite is moderately abundant, forming well-shaped small plates pleochroic from reddish brown to pale yellow, whose preferred orientation defines a foliation through the rock. Quartz forms a minor amount smaller equant anhedral grains, locally as inclusions in K-feldspar. Plagioclase forms uncommon myrmekitic small grains. Tourmaline occurs as blocky subhedral pleochroic dark green crystals. Rutile forms minor small subhedral crystals. This sample has suffered complete recrystallisation under moderate P-T conditions (?amphibolite facies), generating the new foliated granoblastic metamorphic assemblage of K-feldspar + biotite + minor quartz + plagioclase + trace tourmaline + rutile. No primary textures are preserved to aid identification of the primary rock.","SAMPLING_FEATURE_NAME":"2002185851","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129386","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1406644414,"LONG_GDA94":140.2039207192,"ELEV_M_AHD":320,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. 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This darkish, medium-grained quartz-feldspar-biotite gneiss with abundant garnet porphyroblasts to 20 mm contains no magmatic zircon, and is therefore unlikely to be magmatic or even dominantly volcaniclastic in origin. Its protolith is more likely to have been an immature sedimentary rock.\"","SAMPLING_FEATURE_NAME":"2002185812","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129372","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.9559816128,"LONG_GDA94":141.5295169004,"ELEV_M_AHD":278,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Broken Hill Synform, east of Broken Hill township, and ~65 m north of 2002185815.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73512","AGE_REF":"Bodorkos, S., Fitzherbert, J.A., 2022. Timing and significance of pre-Olarian metamorphism in the Willyama Supergroup, Broken Hill, Australia. 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Age continuum between ~1790 and ~1700 Ma interpreted to reflect partial recrystallisation of Igneous grains during ~1685 Ma event.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":24269,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24269","STRAT_UNIT_NAME":"Enbra Granulite","INFORMAL_UNIT_NAME":"Enbra Hills mafic granulite","UNIT_NAME_SOURCE":"Enbra Hills Granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stratigraphic unit inferred from 1:1M scale Surface Geology of Australia GIS dataset","SAMPLING_FEATURE_NAME":"2000081226","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS120010","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.2058747523,"LONG_GDA94":133.8613030326,"ELEV_M_AHD":773,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Enbra Hills","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66863","AGE_REF":"Claoue-Long, J.C., Hoatson, D.M., 2005. Proterozoic mafic-ultramafic intrusions in the Arunta Region, central Australia. Part 2: Event chronology and regional correlations. Precambrian Research, 142(3-4), 134-158.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2005.08.006","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1335","geometry":{"type":"Point","coordinates":[131.856346,-23.311747]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1335,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1582340","IGSN":"10273/AU1582340","SAMPLENO":1582340,"SAMPLE_ID":"2003089517","AGE_MA":1640,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8830","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Based on oldest analysis of overgrowths, which yielded ages ranging down to ~1530 Ma.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":21856,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21856","STRAT_UNIT_NAME":"Glen Helen Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Glen Helen Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"felsic migmatite","SAMPLING_FEATURE_NAME":"2003089517","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS134354","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.311747,"LONG_GDA94":131.856346,"ELEV_M_AHD":680,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"61660","AGE_REF":"Scrimgeour, I.R., Kinny, P.D., Close, D.F., Edgoose, C.J., 2005. High-T granulites and polymetamorphism in the southern Arunta Region, central Australia: Evidence for a 1.64Ga accretional event. Precambrian Research, 142(1-2), 1-27.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2005.08.005","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1337","geometry":{"type":"Point","coordinates":[131.50472,-23.25109]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1337,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1582349","IGSN":"10273/AU1582349","SAMPLENO":1582349,"SAMPLE_ID":"2003089524","AGE_MA":1571,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"U8834","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The distribution of zircon ages in this sample is clearly different from that shown by sample CJE 300 (2003089519). The zircon cores appear to represent a coherent igneous population (apart from the one older core), and presumably record the protolith age for this sample, whilst the rims evidently represent a migmatisation event at ca 1570 Ma which is clearly older than the ca 1150 Ma event recorded by sample CJE 300.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":37707,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU37707","STRAT_UNIT_NAME":"Kakalyi Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Kakalyi Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Kalkalyi Gneiss is part of the Waluwiya Granite Suite.","SAMPLING_FEATURE_NAME":"2003089524","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS134362","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.25109,"LONG_GDA94":131.50472,"ELEV_M_AHD":654,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Worden, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"61660","AGE_REF":"Scrimgeour, I.R., Kinny, P.D., Close, D.F., Edgoose, C.J., 2005. High-T granulites and polymetamorphism in the southern Arunta Region, central Australia: Evidence for a 1.64Ga accretional event. Precambrian Research, 142(1-2), 1-27.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2005.08.005","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13706","geometry":{"type":"Point","coordinates":[140.03791972,-32.23396117]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13706,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578081","IGSN":"10273/AU1578081","SAMPLENO":1578081,"SAMPLE_ID":"R2092278","AGE_MA":1601,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.09,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4127","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":68095,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU68095","STRAT_UNIT_NAME":"Walparuta Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Thin (40 cm) boudinaged layer in unit dominated by layered pelite, psammopelite with occasional psammite layers, locally graded. White, foliated, medium-grained quartz-feldspar-mica rock, initially interpreted as metagranite. This sample displays a partly-preserved framework-supported clastic sedimentary texture, modified by moderately strong metamorphic foliation and partial recrystallisation. Quartz forms large equant grains, but some are slightly elongated in the trace of a moderately strong foliation. Plagioclase forms anhedral grains that form a moderately coarse mosaic between the quartz grains. Muscovite occurs as large plates concentrated in thin folia that contribute to the foliation through the rock, but also as small flakes sprinkled through the plagioclase mosaic. Chlorite is subequal in abundance to muscovite, and like that mineral also forms pleochroic green larger plates interleaved with the foliated muscovite, and smaller well-shaped flakes sprinkled through the plagioclase mosaic. Opaques occur in trace amount as small anhedral grains associated with the muscovite-chlorite folia. Tourmaline forms uncommon but well-crystallised stumpy prisms pleochroic in drab greens. This sample is considered to have formed as a framework-supported coarse-grained clastic sediment composed of abundant quartz and feldspar grains, accompanied by lesser detrital clay materials. Dynamic regional metamorphism in the greenschist facies caused partial recrystallisation to form the foliated assemblage of plagioclase + quartz + muscovite + chlorite + trace opaques + tourmaline.","SAMPLING_FEATURE_NAME":"2002185872","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129412","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.233961172,"LONG_GDA94":140.0379197178,"ELEV_M_AHD":366,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"approx 600m north of 5871","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1278","geometry":{"type":"Point","coordinates":[134.08098859,-23.23911837]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1278,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1576479","IGSN":"10273/AU1576479","SAMPLENO":1576479,"SAMPLE_ID":"2001082001","AGE_MA":1696,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.8,"NUMBER_OF_ANALYSES":18,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3876","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Ages between ~1805 and ~1696 Ma are interpreted as partial resetting caused by ~1696 Ma thermal event.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":"North Australian Craton","STRATNO":24321,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24321","STRAT_UNIT_NAME":"Johannsen Metagabbro","INFORMAL_UNIT_NAME":"Johansenn Metagabbro","UNIT_NAME_SOURCE":"Johannsen Metagabbro","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stratigraphic unit inferred from 1:1M scale Surface Geology of Australia GIS dataset","SAMPLING_FEATURE_NAME":"2001082001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS127271","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.2391183676,"LONG_GDA94":134.0809885934,"ELEV_M_AHD":838,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66863","AGE_REF":"Claoue-Long, J.C., Hoatson, D.M., 2005. Proterozoic mafic-ultramafic intrusions in the Arunta Region, central Australia. Part 2: Event chronology and regional correlations. Precambrian Research, 142(3-4), 134-158.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2005.08.006","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13591","geometry":{"type":"Point","coordinates":[141.5295169,-31.95598161]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13591,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578029","IGSN":"10273/AU1578029","SAMPLENO":1578029,"SAMPLE_ID":"2002185812","AGE_MA":1600.7,"AGE_MA_UNCERTAINTY":3.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4130","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":26261,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26261","STRAT_UNIT_NAME":"Cues Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stevens et al. (2008, AJES) paraphrased: \"Potosi-type gneiss in the Cues Formation occurs as lenticular bodies up to 20 m thick and 100 m long, generally associated with metabasic rocks. Laing et al. (1984), Laing (1996) and Stevens & Barron (2002) showed that similar Potosi-type gneiss in the Hores Gneiss was volcanic in origin, on the basis of preserved volcanic textures. Although no such textures have yet been documented from Potosi-type gneiss in the Cues Formation, two samples were studied with the aim of at least determining maximum ages for deposition of the Cues Formation succession. (The most likely alternative origin for Potosi-type gneiss is sandstone incorporating some volcanic detritus.) A Potosi-type gneiss (2002185812) was collected from a body 100 m long and 15 m wide, interlayered with basic granulite in the closure of the Broken Hill Synform. This darkish, medium-grained quartz-feldspar-biotite gneiss with abundant garnet porphyroblasts to 20 mm contains no magmatic zircon, and is therefore unlikely to be magmatic or even dominantly volcaniclastic in origin. Its protolith is more likely to have been an immature sedimentary rock.\"","SAMPLING_FEATURE_NAME":"2002185812","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129372","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.9559816128,"LONG_GDA94":141.5295169004,"ELEV_M_AHD":278,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Broken Hill Synform, east of Broken Hill township, and ~65 m north of 2002185815.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73512","AGE_REF":"Bodorkos, S., Fitzherbert, J.A., 2022. Timing and significance of pre-Olarian metamorphism in the Willyama Supergroup, Broken Hill, Australia. Precambrian Research, 378, 106772, 9p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2022.106772","AGE_ENTRY_DATE":"2023-01-18","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13651","geometry":{"type":"Point","coordinates":[140.14805641,-32.1496196]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13651,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578051","IGSN":"10273/AU1578051","SAMPLENO":1578051,"SAMPLE_ID":"R2092261","AGE_MA":1593,"AGE_MA_UNCERTAINTY":37,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":7.4,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4127","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Estimated age of metamorphism, from dispersed analyses.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":29840,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29840","STRAT_UNIT_NAME":"George Mine Formation","INFORMAL_UNIT_NAME":"leucosome, George Mine Formation, Wiperaminga Subgroup","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"felsic migmatitic leucosome melt rock. This sample displays a massive granitoid texture modified by weak selective pervasive alteration. Plagioclase is abundant, forming subhedral stumpy twinned grains and anhedral grains that lie in equilibrium texture with anhedral lobate unstrained quartz grains. Biotite occurs as well-shaped discrete plates of random orientation, pleochroic from dark chocolate brown to straw yellow. Some biotite plates have undergone partial replacement by pleochroic green chlorite with small opaque inclusions, but most biotite remains fresh. White mica occurs in two forms: large plates lie interleaved with similarly coarse biotite plates; fine-grained dense mats of sericite form large lenses or folia, possibly pseudomorphous after a precursor phase (eg ?sillimanite but none is preserved), and some small sericite flakes have partly replaced some of the plagioclase grains. Opaques occur in two forms: minor equant crystals of cubic morphology are sparsely scattered through the rock, and tiny opaque granules form trails around biotite plate margins. Zircon forms small terminated prisms in quartz, but some zircon also forms small rounded grains within the sericitic aggregates. This sample is considered to have formed as a tonalitic igneous rock, originally composed of plagioclase + quartz + biotite + minor muscovite + trace zircon. Possible lenses or mats of ?sillimanite +/- zircon might have been present as relict source materials (?restite). Thus two generations of zircons are identified. Subsequent retrogressive alteration generated sericite + chlorite + trace opaques: the sericite formed by replacement of the ?sillimanite mats and as partial replacements of plagioclase, and the chlorite formed as local replacements of some biotite plates.","SAMPLING_FEATURE_NAME":"2002185855","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129391","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.1496195975,"LONG_GDA94":140.1480564075,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"east of Outalpa Hill","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-23","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1387","geometry":{"type":"Point","coordinates":[133.09547659,-22.46038526]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1387,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1593343","IGSN":"10273/AU1593343","SAMPLENO":1593343,"SAMPLE_ID":"Krn-6","AGE_MA":1580,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The age given here of 1580 +/- 6 Ma is a weighted mean age for analyses 9.2, 10.1 and 36.1. Vry et al. (1996) interpret this ~1580 Ma age to represent the timing of a granulite facies metamorphic event in the south-east part of the Reynolds Range. The youngest detrital grains indicate a max deposition age of ~1850 Ma and the ages between ~1600 and ~1800 Ma (spots 34, 40 and 11) represent mixed ages between the ~1850 Ma cores and the ~1580 Ma rims.  ","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"metasedimentary rock","SAMPLING_FEATURE_NAME":"2001088003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121874","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4603852562,"LONG_GDA94":133.0954765943,"ELEV_M_AHD":695,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7824","AGE_REF":"Vry, J., Compston, W., Cartwright, I., 1996. SHRIMP II dating of zircons and monazites: Reassessing the timing of high-grade metamorphism and fluid flow in the Reynolds Range, northern Arunta Block, Australia. Journal of Metamorphic Geology, 14(3), 335-350.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00335.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13593","geometry":{"type":"Point","coordinates":[141.5295169,-31.95598161]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13593,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578029","IGSN":"10273/AU1578029","SAMPLENO":1578029,"SAMPLE_ID":"2002185812","AGE_MA":1597.3,"AGE_MA_UNCERTAINTY":3.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.5,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"Z4130","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":26261,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26261","STRAT_UNIT_NAME":"Cues Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stevens et al. (2008, AJES) paraphrased: \"Potosi-type gneiss in the Cues Formation occurs as lenticular bodies up to 20 m thick and 100 m long, generally associated with metabasic rocks. Laing et al. (1984), Laing (1996) and Stevens & Barron (2002) showed that similar Potosi-type gneiss in the Hores Gneiss was volcanic in origin, on the basis of preserved volcanic textures. Although no such textures have yet been documented from Potosi-type gneiss in the Cues Formation, two samples were studied with the aim of at least determining maximum ages for deposition of the Cues Formation succession. (The most likely alternative origin for Potosi-type gneiss is sandstone incorporating some volcanic detritus.) A Potosi-type gneiss (2002185812) was collected from a body 100 m long and 15 m wide, interlayered with basic granulite in the closure of the Broken Hill Synform. This darkish, medium-grained quartz-feldspar-biotite gneiss with abundant garnet porphyroblasts to 20 mm contains no magmatic zircon, and is therefore unlikely to be magmatic or even dominantly volcaniclastic in origin. Its protolith is more likely to have been an immature sedimentary rock.\"","SAMPLING_FEATURE_NAME":"2002185812","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129372","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.9559816128,"LONG_GDA94":141.5295169004,"ELEV_M_AHD":278,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Broken Hill Synform, east of Broken Hill township, and ~65 m north of 2002185815.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73512","AGE_REF":"Bodorkos, S., Fitzherbert, J.A., 2022. Timing and significance of pre-Olarian metamorphism in the Willyama Supergroup, Broken Hill, Australia. 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(2008, AJES) paraphrased: \"Potosi-type gneiss in the Cues Formation occurs as lenticular bodies up to 20 m thick and 100 m long, generally associated with metabasic rocks. Laing et al. (1984), Laing (1996) and Stevens & Barron (2002) showed that similar Potosi-type gneiss in the Hores Gneiss was volcanic in origin, on the basis of preserved volcanic textures. Although no such textures have yet been documented from Potosi-type gneiss in the Cues Formation, two samples were studied with the aim of at least determining maximum ages for deposition of the Cues Formation succession. (The most likely alternative origin for Potosi-type gneiss is sandstone incorporating some volcanic detritus.) A Potosi-type gneiss (2002185812) was collected from a body 100 m long and 15 m wide, interlayered with basic granulite in the closure of the Broken Hill Synform. This darkish, medium-grained quartz-feldspar-biotite gneiss with abundant garnet porphyroblasts to 20 mm contains no magmatic zircon, and is therefore unlikely to be magmatic or even dominantly volcaniclastic in origin. Its protolith is more likely to have been an immature sedimentary rock.\"","SAMPLING_FEATURE_NAME":"2002185812","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129372","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.9559816128,"LONG_GDA94":141.5295169004,"ELEV_M_AHD":278,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Broken Hill Synform, east of Broken Hill township, and ~65 m north of 2002185815.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73512","AGE_REF":"Bodorkos, S., Fitzherbert, J.A., 2022. Timing and significance of pre-Olarian metamorphism in the Willyama Supergroup, Broken Hill, Australia. 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This sample displays a xenomorphic crystalline texture with large elongated mica-rich foliated aggregates. Much of the rock is composed of a massive felsic mosaic composed of large anhedral K-feldspar grains (microcline), clear anhedral quartz grains, and blocky to anhedral twinned plagioclase grains which contain smaller ovoid unstrained quartz grains. This felsic part of the rock has the appearance of a leuco-granitoid. Small pleochroic dark tan brown to straw yellow biotite plates occur locally at felsic grain margins. Part of the rock is composed of subparallel lenses or trails composed of dense mats of interleaved pleochroic dark tan brown to straw yellow biotite, lesser muscovite plates, and uncommon blocky grains of allanite. Small zircon grains and prisms occur in the biotite with dark pleochroic radiation-damage haloes. Sericite occurs as fine-grained dense mats within the mica-rich lenses, possibly after mineral (?plagioclase, ?cordierite), and some sericite also occurs more widely through the rock as small replacement flecks in some plagioclase grains. Chlorite occurs in trace amount as local replacements of some biotite flakes. This sample is considered to have formed as a monzogranitic igneous rock, originally composed of K-feldspar + quartz + plagioclase + minor biotite. It contained dense aggregates of biotite + muscovite + trace allanite + zircon. Together, the felsic granitoid and the foliated enclaves possibly represent granitoid melt and restite materials.","SAMPLING_FEATURE_NAME":"2002185856","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129393","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.160873868,"LONG_GDA94":140.1623003415,"ELEV_M_AHD":392,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"approx 2 km south of 5855","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75054","AGE_REF":"Jagodzinski, E.A., Kositcin, N., Michael, U., Bodorkos, S., 2023, 2023 data release of U-Pb dates for the Curnamona Province in South Australia: advances in the stratigraphy of the Olary Domain. Australian Earth Sciences Convention, Perth, June 2023. Geological Society of Australia Abstracts, Poster.","AGE_PUBLICATION_LINKS":"https://doi.org/10.13140/RG.2.2.12189.90088","AGE_ENTRY_DATE":"2023-06-25","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4136","geometry":{"type":"Point","coordinates":[134.217372,-23.141193]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4136,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1580084","IGSN":"10273/AU1580084","SAMPLENO":1580084,"SAMPLE_ID":"2003087422A","AGE_MA":1002,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.12,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4273","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":"North Australian Craton","STRATNO":26447,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26447","STRAT_UNIT_NAME":"Cadney Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Garnet-biotei-K-spar-silliminate? gneiss, 31.2-32.3 m depth; quarter core","SAMPLING_FEATURE_NAME":"E058-005","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620860","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.141193,"LONG_GDA94":134.217372,"ELEV_M_AHD":739,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Hussey, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":null,"AGE_PUBLICATION_LINKS":null,"AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1415","geometry":{"type":"Point","coordinates":[133.02846276,-22.45867697]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1415,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1595869","IGSN":"10273/AU1595869","SAMPLENO":1595869,"SAMPLE_ID":"R494-116Y","AGE_MA":1576,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Retrogressive cooling of sgregation","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":16061,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16061","STRAT_UNIT_NAME":"Reynolds Range Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Reynolds Range Group/Pine Hill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"metasomatic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartz metasomatite","SAMPLING_FEATURE_NAME":"2001088009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121922","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4586769728,"LONG_GDA94":133.0284627572,"ELEV_M_AHD":763,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Reynolds Range","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7841","AGE_REF":"Williams, I.S., Buick, I.S., Cartwright, I., 1996. An extended episode of early Mesoproterozoic metamorphic fluid flow in the Reynolds Range, central Australia \t\t. Journal of Metamorphic Geology, 14(1), 29-47.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1525-1314.1996.00029.x","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1416","geometry":{"type":"Point","coordinates":[133.02846276,-22.45867697]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1416,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1595869","IGSN":"10273/AU1595869","SAMPLENO":1595869,"SAMPLE_ID":"R494-116Y","AGE_MA":1586,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Williams and Collins (1996) interpret this 1586 +/- 5 Ma, zircon overgrowth age to represent the post peak metamorphic zircon growth in the Reynolds Range. The ~1860 Ma and ~2450 Ma ages represent inherited age clusters.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":16061,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16061","STRAT_UNIT_NAME":"Reynolds Range Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Reynolds Range Group/Pine Hill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"metasomatic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartz metasomatite","SAMPLING_FEATURE_NAME":"2001088009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS121922","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4586769728,"LONG_GDA94":133.0284627572,"ELEV_M_AHD":763,"ACCURACY_M":500,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Reynolds Range","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Publication","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"7841","AGE_REF":"Williams, I.S., Buick, I.S., Cartwright, I., 1996. An extended episode of early Mesoproterozoic metamorphic fluid flow in the Reynolds Range, central Australia \t\t. 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Precambrian Research, 142(1-2), 1-27.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2005.08.005","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2019-07-11"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9781","geometry":{"type":"Point","coordinates":[141.66917516,-32.20190487]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9781,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1578031","IGSN":"10273/AU1578031","SAMPLENO":1578031,"SAMPLE_ID":"2002185813","AGE_MA":1575,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4120","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic zircon suite","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":15968,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU15968","STRAT_UNIT_NAME":"Redan Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Stevens et al. (2008, AJES) paraphrased: \"The thinly layered gneiss at Love's (1992) GC1 site was resampled from the location 2 km WNW of Redan homestead (note: not east, as stated in Love 1992). Our sample at the GC1 site (Sample 2002185813) is an oligoclase-microcline-quartz-epidote-hornblende-magnetite gneiss (\"calc-albitite\") with minor sphene and apatite, displaying well developed bedding lamination, like that shown in Stevens & Corbett (1993 figure 4).","SAMPLING_FEATURE_NAME":"2002185813","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS129373","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Murray Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.2019048686,"LONG_GDA94":141.6691751643,"ELEV_M_AHD":164,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Redan homestead area. 2km west of Redan homestead","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Page, R.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64097","AGE_REF":"Stevens, B.P.J., Page, R.W., Crooks, A., 2008. Geochronology of Willyama Supergroup metavolcanics, metasediments and contemporaneous intrusions, Broken Hill, Australia. Australian Journal of Earth Sciences, 55(3), 301-330.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701769456","AGE_ENTRY_DATE":"2021-09-17","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7374","geometry":{"type":"Point","coordinates":[128.19537,-25.65931]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7374,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1936880","IGSN":"10273/AU1936880","SAMPLENO":1936880,"SAMPLE_ID":"187174","AGE_MA":1208,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.12,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"high grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"1301 +/- 13 Ma. 1sigma. Single analysis","AGE_REMARK_FROM_SOURCE":"The date of 1301 +/- 13 Ma (1 sigma) for the single analysis represents a maximum age of deposition for the sandstone.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wirku Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"sandstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"metasandstone (mt)","SAMPLING_FEATURE_NAME":"187174","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS440115","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Block","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-25.65931,"LONG_GDA94":128.19537,"ELEV_M_AHD":618,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-12","SAMPLE_ORIGINATOR":"Smithies, R.H.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD and Smithies, RH 2011, 187174: metasandstone, Prostanthera Hill; Geochronology Record 933: Geological Survey of Western Australia, 5p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/187174.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13455","geometry":{"type":"Point","coordinates":[138.8740777,-34.98953238]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13455,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953826","IGSN":"10273/AU1953826","SAMPLENO":1953826,"SAMPLE_ID":"R1588240","AGE_MA":1635,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Number of analyses corresponds to the oldest component (24% of the population) derived from 3-component mixture modelling of 48 analyses.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from a small outcrop in a drainage depression near Downers Road, approximately 2 km east of the Oakbank township, on the eastern limit of the Oakbank inlier. It is a biotite-rich schist, with a fine-grained quartz and K-feldspar groundmass. Biotite defines a well-developed foliation which is deformed into open folds at the outcrop scale. The groundmass of quartz and feldspars is fine grained, averaging 0.5 mm grain sizes, with some coarse K-feldspar crystals up to 5 mm which are wrapped by the biotite foliation. This sample site is weathered and friable which casts some uncertainty on the identification of the fine grained groundmass minerals in hand specimen. The metasediments of the Oakbank Inlier are poorly exposed and have not been mapped or described in any detail previously. This inlier is intruded by the 856 +/- 20 Ma granite of Preiss et al. (2008), as well as a large pegmatite dykes of an unknown age. The Oakbank Inlier lies within the andalusite-staurolite isograd of the Delamerian Orogen which makes a potential Cambrian overprint or retrogression likely. In thin section, this sample displays a foliated granoblastic metamorphic texture with indistinct mineralogical banding. Plagioclase is abundant, forming equant anhedral grains mostly c. 0.4 mm in size, with sharp grain contacts and triple-grain junctions approaching 120 degrees. The resulting granoblastic mosaic suggests more-or-less equilibrium recrystallisation at elevated P-T conditions.  Biotite is the other principal mineral. It forms well-shaped plates mostly c. 0.5-1.0 mm long. Their strong preferred orientation contributes to a strong penetrative foliation. Chlorite occurs in minor amount as small pleochroic green flakes, interleaved with some of the biotite plates. Opaques occur in minor amount as bladed crystals c. 0.2-0.5 mm long. A feldspathic siltstone is considered a likely protolith.","SAMPLING_FEATURE_NAME":"R1588240","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450317","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9895323761,"LONG_GDA94":138.8740777015,"ELEV_M_AHD":408,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588240 was collected from a small outcrop in a drainage depression near Downers Road, about 2 km E of Oakbank township, on the E limit of the Oakbank Inlier.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.632","geometry":{"type":"Point","coordinates":[144.24098747,-18.17398617]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":632,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937163","IGSN":"10273/AU1937163","SAMPLENO":1937163,"SAMPLE_ID":"2007169014","AGE_MA":1568,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":27,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6046","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 1581-1548 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Einasleigh Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from Junction Creek directly north of the Gulf Developmental Road, west of Mount Surprise, in the Etheridge Province, Queensland. The sample is mapped as a subunit of the Einasleigh Metamorphics, and consists of a quartz +feldspar+sillimanite+garnet granitic gneiss. The granitic gneiss occurs as pods within a migmatite, which is the dominant rock type at this locality.","SAMPLING_FEATURE_NAME":"2007169014","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS443135","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.1739861699,"LONG_GDA94":144.2409874717,"ELEV_M_AHD":403,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67341","AGE_REF":"Neumann, N.L., Kositcin, N., 2011. New SHRIMP U-Pb zircon ages from North Queensland 2007-2010. Geoscience Australia. Record, 2011/38, 82p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/72648","AGE_ENTRY_DATE":"2013-10-02","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.633","geometry":{"type":"Point","coordinates":[144.33022174,-19.33006964]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":633,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937164","IGSN":"10273/AU1937164","SAMPLENO":1937164,"SAMPLE_ID":"2007169015","AGE_MA":1568,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":31,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6046","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 1583-1538 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":"Einasleigh Metamorphics/1e","UNIT_NAME_SOURCE":"Einasleigh Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"calc-silicate rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from a creek section west of the Kennedy Developmental Road, ~15 km south-southwest of Lyndhurst, in the Etheridge Province, Queensland. A previous zircon geochronological study by Black et al. (2005) analysed a leucocratic quartzo-feldspathic gneiss from the same creek section. In that study, a weighted mean age of 1703 +/- 14 Ma was interpreted to record the crystallisation age of the sample, with a younger age of 1563 +/- 4 Ma interpreted to represent zircon recrystallisation. This sample is a hornblende-diopside calcsilicate rock, mapped as a subunit of the Einasleigh Metamorphics.","SAMPLING_FEATURE_NAME":"2007169015","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS443136","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.3300696407,"LONG_GDA94":144.3302217433,"ELEV_M_AHD":689,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67341","AGE_REF":"Neumann, N.L., Kositcin, N., 2011. New SHRIMP U-Pb zircon ages from North Queensland 2007-2010. Geoscience Australia. Record, 2011/38, 82p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/72648","AGE_ENTRY_DATE":"2013-10-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3812","geometry":{"type":"Point","coordinates":[134.90706759,-30.84728345]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3812,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945797","IGSN":"10273/AU1945797","SAMPLENO":1945797,"SAMPLE_ID":"R1562453","AGE_MA":2442,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":27643,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27643","STRAT_UNIT_NAME":"Kenella Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample of the Kenella Gneiss is from the central Mulgathing Complex, east of the township of Tarcoola. In this region the Kenella Gneiss varies from quartz-feldspar-biotite gneiss to quartz-feldspar gneiss, and occurs together with layer-parallel and discordant amphibolite units. The sample, R1562453, is a quartz-plagioclase gneiss that contains minor muscovite and around 5% opaque minerals. The opaque species, possibly ilmenite or magnetite, occurs as anhedral to subhedral grains that are interstitial to the quartz-feldspar matrix, but may also occur as inclusions within either of the silicate minerals. The relative abundance of the opaque mineral species suggest the sample may be derived from a siliceous volcanic or volcaniclastic protolith. The data from the Kenella Gneiss sample complements U-Pb zircon data from two samples reported by Swain et al. (2005).","SAMPLING_FEATURE_NAME":"R1562453","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444458","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.8472834538,"LONG_GDA94":134.9070675907,"ELEV_M_AHD":160,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-21","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3818","geometry":{"type":"Point","coordinates":[133.0799513,-29.63722045]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3818,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945959","IGSN":"10273/AU1945959","SAMPLENO":1945959,"SAMPLE_ID":"R1562988","AGE_MA":2463,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":29823,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29823","STRAT_UNIT_NAME":"Mobella Tonalite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The IL2 prospect was identified in 1977 from ground geochemical and magnetic survey adjacent to a playa lake associated with the Garford Palaeochannel. The survey defined a small, intense, near circular magnetic anomaly, and although yhe geochemical survey revealed no above background results (except minor elevation in Zn), a diamond drill hole, NNL IL2 DDH 1 was spudded to test the magnetic anomaly, which was modelled to be shallow. The drill hole was completed to 191.79 m and intersected a sequence of foliated granites, pyroxene-bearing tonalite, and pegmatitic segregations. A small zone between 113 and 156 m shows ca 5% magnetite content. Sample R1562988 is a two-mica tonalite gneiss of the Mobella Tonalite. Texturally the sample is granoblastic, with lobate grain boundaries between quartz very common. Quartz occurs as grains up to 5 mm diameter and shows both subgrain development and lobate grain boundaries, together with extensive undulose extinction. Feldspar is present as plagioclase and K-feldspar (microcline). Plagioclase is abundant and perthitic in places and also shows preferential retrogression, being typically clouded, likely due to sericite. Biotite and muscovite occur as medium seized grains, typically <1 mm along the long axis of the grains, and is interstitial to the quartz-feldspar matrix. Muscovite shows very light green pleochroism, and is typically associated with small opaque minerals. The biotite is light brown in colour and shows radiation damage halos, likely from monazite inclusions. Trace zircon is present.","SAMPLING_FEATURE_NAME":"NNL IL2 DDH 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444928","BOREHOLE_TOP_DEPTH_M":144.5,"BOREHOLE_BASE_DEPTH_M":145,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6372204537,"LONG_GDA94":133.0799512954,"ELEV_M_AHD":154,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3813","geometry":{"type":"Point","coordinates":[134.90706759,-30.84728345]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3813,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945797","IGSN":"10273/AU1945797","SAMPLENO":1945797,"SAMPLE_ID":"R1562453","AGE_MA":2465,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.14,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":27643,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27643","STRAT_UNIT_NAME":"Kenella Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample of the Kenella Gneiss is from the central Mulgathing Complex, east of the township of Tarcoola. In this region the Kenella Gneiss varies from quartz-feldspar-biotite gneiss to quartz-feldspar gneiss, and occurs together with layer-parallel and discordant amphibolite units. The sample, R1562453, is a quartz-plagioclase gneiss that contains minor muscovite and around 5% opaque minerals. The opaque species, possibly ilmenite or magnetite, occurs as anhedral to subhedral grains that are interstitial to the quartz-feldspar matrix, but may also occur as inclusions within either of the silicate minerals. The relative abundance of the opaque mineral species suggest the sample may be derived from a siliceous volcanic or volcaniclastic protolith. The data from the Kenella Gneiss sample complements U-Pb zircon data from two samples reported by Swain et al. (2005).","SAMPLING_FEATURE_NAME":"R1562453","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444458","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.8472834538,"LONG_GDA94":134.9070675907,"ELEV_M_AHD":160,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-21","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3509","geometry":{"type":"Point","coordinates":[139.69481259,-29.97843978]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3509,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952117","IGSN":"10273/AU1952117","SAMPLENO":1952117,"SAMPLE_ID":"2007379015","AGE_MA":599,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6052","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":23414,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23414","STRAT_UNIT_NAME":"Box Bore Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained megacrystic granite with K-feldspar megacrysts in qtz + bte matrix, strong gneissic fabric","SAMPLING_FEATURE_NAME":"2007379015","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448979","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.9784397753,"LONG_GDA94":139.694812593,"ELEV_M_AHD":333,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-28","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.601","geometry":{"type":"Point","coordinates":[133.83375012,-26.18509842]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":601,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1926733","IGSN":"10273/AU1926733","SAMPLENO":1926733,"SAMPLE_ID":"R1039159","AGE_MA":1153,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.11,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6109","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Birksgate Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was selected for geochronology based on field relationships and petrographic interpretation that suggested this was a comparatively rare layered meta-sediment or volcaniclastic unit of the Birksgate Complex within the Tieyon 100k mapsheet. It is a uniformly fine- to medium-grained felsic rock dominated by pale grey felsic grains, and containing small uniformly distributed small black flakes (biotite) with weak preferred orientation defining a weak foliation. The sample responds weakly to the hand magnet, suggesting magnetite occurs pervasively in minor amount. The protolith for this sample is uncertain: it may have formed as a quartzo-feldspathic sediment, possibly of silty to sandy type, dominated by feldspar and quartz clastic grains, accompanied by trace clastic zircon and minor detrital clays. However, an alternative origin as a micro-granitoid remains possible. Recrystallisation occurred in response to regional metamorphism at elevated P-T conditions (amphibolite facies). This produced the medium-grained foliated granoblastic metamorphic assemblage of K-feldspar + quartz + plagioclase + minor biotite + opaques (including magnetite). Trace clastic zircon appears to have survived this event. At a later time, after uplift and erosion had elevated the rock body into a shallower crustal environment at greenschist facies P-T conditions, a very small amount of fluid circulated through the rock and produced minor new replacement sericite + biotite + chlorite. The presence of biotite in this assemblage suggests that the P-T conditions were in the middle greenschist facies (ie biotite grade). Note that this fine-grained biotite occurs in only trace amount, only in the sericitic clouds after plagioclase, and is much less abundant than the prograde biotite which formed larger well-shaped plates.","SAMPLING_FEATURE_NAME":"R1039159","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS429100","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.1850984202,"LONG_GDA94":133.8337501248,"ELEV_M_AHD":408,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-10-02","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-25","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13453","geometry":{"type":"Point","coordinates":[138.8740777,-34.98953238]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13453,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953826","IGSN":"10273/AU1953826","SAMPLENO":1953826,"SAMPLE_ID":"R1588240","AGE_MA":1594,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Number of analyses corresponds to the youngest component (27% of the population) derived from 3-component mixture modelling of 48 analyses.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from a small outcrop in a drainage depression near Downers Road, approximately 2 km east of the Oakbank township, on the eastern limit of the Oakbank inlier. It is a biotite-rich schist, with a fine-grained quartz and K-feldspar groundmass. Biotite defines a well-developed foliation which is deformed into open folds at the outcrop scale. The groundmass of quartz and feldspars is fine grained, averaging 0.5 mm grain sizes, with some coarse K-feldspar crystals up to 5 mm which are wrapped by the biotite foliation. This sample site is weathered and friable which casts some uncertainty on the identification of the fine grained groundmass minerals in hand specimen. The metasediments of the Oakbank Inlier are poorly exposed and have not been mapped or described in any detail previously. This inlier is intruded by the 856 +/- 20 Ma granite of Preiss et al. (2008), as well as a large pegmatite dykes of an unknown age. The Oakbank Inlier lies within the andalusite-staurolite isograd of the Delamerian Orogen which makes a potential Cambrian overprint or retrogression likely. In thin section, this sample displays a foliated granoblastic metamorphic texture with indistinct mineralogical banding. Plagioclase is abundant, forming equant anhedral grains mostly c. 0.4 mm in size, with sharp grain contacts and triple-grain junctions approaching 120 degrees. The resulting granoblastic mosaic suggests more-or-less equilibrium recrystallisation at elevated P-T conditions.  Biotite is the other principal mineral. It forms well-shaped plates mostly c. 0.5-1.0 mm long. Their strong preferred orientation contributes to a strong penetrative foliation. Chlorite occurs in minor amount as small pleochroic green flakes, interleaved with some of the biotite plates. Opaques occur in minor amount as bladed crystals c. 0.2-0.5 mm long. A feldspathic siltstone is considered a likely protolith.","SAMPLING_FEATURE_NAME":"R1588240","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450317","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9895323761,"LONG_GDA94":138.8740777015,"ELEV_M_AHD":408,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588240 was collected from a small outcrop in a drainage depression near Downers Road, about 2 km E of Oakbank township, on the E limit of the Oakbank Inlier.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3779","geometry":{"type":"Point","coordinates":[131.75974753,-30.58572575]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3779,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937338","IGSN":"10273/AU1937338","SAMPLENO":1937338,"SAMPLE_ID":"2007371002a","AGE_MA":1692,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":29,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6043","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"k-feldspar gneiss","SAMPLING_FEATURE_NAME":"Ooldea 2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444032","BOREHOLE_TOP_DEPTH_M":142,"BOREHOLE_BASE_DEPTH_M":143,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.5857257485,"LONG_GDA94":131.7597475293,"ELEV_M_AHD":106,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13449","geometry":{"type":"Point","coordinates":[138.77775076,-34.97182285]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13449,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953829","IGSN":"10273/AU1953829","SAMPLENO":1953829,"SAMPLE_ID":"R1588243","AGE_MA":1582,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.86,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588243 was collected from the NE Aldgate Inlier, adjacent to Greenhill Road about 5 km N of Bridgewater and is a psammite layer within a weathered sillimanite-bearing gneiss. The psammite is coarse grained (up to 2 mm) and dominated by quartz with minor weathered feldspar. The surrounding pelites clearly preserve a sillimanite- and mica-dominated assemblage. The mica species are difficult to identify due to weathering, however biotite is a likely constituent due to iron oxide staining, with finer-grained muscovite which may be related to retrogression. Leucosomes are uncommon but are observed on a 2-5 cm scale, and parallel a weak gneissosity defined by segregation of quartzofeldspathic and pelitic minerals. The basement rock at the sample location is directly overlain 50 m away by the basal units of the Neoproterozoic Aldgate Sandstone, which in this location feature a strong cleavage, which is also observed in the basement lithology. In thin section, sample R1588243 displays a partly preserved foliated and mineralogically banded texture, severely modified by subsequent pervasive alteration. Quartz occurs in significant amount as anhedral grains which range from c. 0.4 mm up to 4 mm. Smaller grains and larger grains tend to be concentrated in indistinct subparallel bands many millimetres thick, which defines mineralogical and grain size banding. White mica is abundant and occurs as aligned plates scattered throughout through the rock, and their preferred orientation defines a foliation subparallel to the mineralogical banding defined by quartz grains. However most white mica occurs as tiny anhedral grains with random orientation, forming a fine-grained  pervasive mat throughout the rock. It is readily interpreted as a pervasive alteration phase. Opaque oxide minerals occur in significant amount as grains c. 0.4-1.0 mm in size. Tourmaline and zircon occur in trace amounts.","SAMPLING_FEATURE_NAME":"R1588243","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450320","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.971822851,"LONG_GDA94":138.7777507562,"ELEV_M_AHD":520,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588243 was collected from the NE Aldgate Inlier, adjacent to Greenhill Road about 5 km N of Bridgewater.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.687","geometry":{"type":"Point","coordinates":[148.22259076,-20.62905598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":687,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953976","IGSN":"10273/AU1953976","SAMPLENO":1953976,"SAMPLE_ID":"200701514","AGE_MA":298.2,"AGE_MA_UNCERTAINTY":6.9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6060","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 304-294 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":75659,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU75659","STRAT_UNIT_NAME":"Key Creek Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Key Creek Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample of biotite paragneiss was collected from an outcrop in a creek bed ~50 m N of Normanby Road, on Sutherland station ~40 km SSE of Collinsville. The Key Creek Gneiss forms an extensive (~265 km2) metamorphic complex located in the centre of the Urannah Batholith. The rocks within the complex are mainly upper amphibolite-grade paragneisses, which have a distinctive elevated thorium response on radiometric images. The analysed sample comprises mainly quartz, feldspar, andalusite (commonly extensively altered), biotite and muscovite, with minor garnet, traces of apatite, zircon, and monazite, and scattered quartz inclusions. Previous geochronology on this sample includes SHRIMP U-Pb zircon analysis and Isotope Dilution Thermal Ionisation Mass Spectrometry (ID-TIMS) U-Pb monazite analyses (sample 1953976/RJB2913; Cross et al. 2012a). SHRIMP U-Pb zircon geochronology of two Key Creek Gneiss samples reported by Cross et al. (2012a) gave metamorphic ages of 297.0 +/- 2.7 Ma and 298.2 +/- 6.9 Ma (samples: 1980488/BB4952, 1953976/RJB2913 respectively).These SHRIMP U-Pb zircon ages, derived from analyses of low Th/U metamorphic rims, are in contrast to the ID-TIMS U-Pb monazite age determination for one of these samples (1953976/RJB2913) which gave an age of 291.0 +/- 0.9 Ma (Cross et al. 2012a). These ages led Cross et al. (2012a) to suggest that metamorphism within the metamorphic complex, was a protracted event between ~300 Ma and ~290 Ma. The IDTIMS U-Pb monazite age determination of 291.0 +/- 0.9 Ma reported for sample 1953976/RJB2913 (Cross et al., 2012a) is, however, somewhat equivocal as three of the six fractions analysed were interpreted to have possibly undergone Pb-loss, and were consequently not used in the age calculation. Therefore, an additional isotopic study of these monazites was undertaken by SHRIMP U-Pb to further examine the metamorphic crystallisation age of these grains.","SAMPLING_FEATURE_NAME":"200701514","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS451604","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.62905598,"LONG_GDA94":148.2225907619,"ELEV_M_AHD":469,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-29","SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68901","AGE_REF":"Cross, A.J., Bultitude, R.J., Purdy, D.J., 2013. Summary of Results - Joint GSQ-GA Geochronology Project: Ayr, Bowen, Eulo, Mount Coolon, Proserpine and Warwick 1:250 000 sheet areas. Queensland Geological Record, 2012/19, 146p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr089851","AGE_ENTRY_DATE":"2013-06-17","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1476","geometry":{"type":"Point","coordinates":[135.27860548,-24.06994913]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1476,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945962","IGSN":"10273/AU1945962","SAMPLENO":1945962,"SAMPLE_ID":"HA07CJC089","AGE_MA":1157,"AGE_MA_UNCERTAINTY":22,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.11,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6040","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Correlates with the Teapot Event (1150 - 1130 Ma, e.g. Scrimgeour 2003, Claoue-Long and Hoatson 2005.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mafic-Intermediate Volcanic Rock","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate volcanic rock","LITHOLOGY":"volcaniclastic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"small raft (20m by 100m) of intermediate to mafic hornblende-magnetite layered volcanic or volcaniclastic unit hosted within 1640 Ma Warumpi granites of the western Casey Inlier.","SAMPLING_FEATURE_NAME":"HA07CJC089","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444932","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Amadeus Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-24.0699491276,"LONG_GDA94":135.2786054809,"ELEV_M_AHD":-19,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-09-18","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67479","AGE_REF":"Carson, C.J., Hollis, J.A., Glass, L.M., Close, D.F., Whelan, J.A., Wygralak, A., 2011. Summary of results. Joint NTGS-GA geochronology project: East Arunta Region, Pine Creek Orogen and Murphy Inlier, July 2007-June 2009. Northern Territory Geological Survey Record, 2010-004, 84p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82453","AGE_ENTRY_DATE":"2013-06-28","AGE_LAST_UPDATED":"2020-11-03"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3787","geometry":{"type":"Point","coordinates":[131.91597178,-30.62888622]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3787,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937341","IGSN":"10273/AU1937341","SAMPLENO":1937341,"SAMPLE_ID":"2007371003a","AGE_MA":1680,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":25,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6043","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample is a strongly mylonitic garnet-quartz-plagioclase-K-feldspar-magnetite gneiss. The mylonitic foliation is defined by ribbons of polygonal-textured, recrystallised quartz and bands of oriented biotite and muscovite that wrap around porphyroblasts of garnet and feldspar.","SAMPLING_FEATURE_NAME":"Ooldea 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444033","BOREHOLE_TOP_DEPTH_M":221,"BOREHOLE_BASE_DEPTH_M":222,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.6288862168,"LONG_GDA94":131.9159717753,"ELEV_M_AHD":112,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3789","geometry":{"type":"Point","coordinates":[131.91597178,-30.62888622]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3789,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937341","IGSN":"10273/AU1937341","SAMPLENO":1937341,"SAMPLE_ID":"2007371003a","AGE_MA":1678,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6073","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample is a strongly mylonitic garnet-quartz-plagioclase-K-feldspar-magnetite gneiss. The mylonitic foliation is defined by ribbons of polygonal-textured, recrystallised quartz and bands of oriented biotite and muscovite that wrap around porphyroblasts of garnet and feldspar.","SAMPLING_FEATURE_NAME":"Ooldea 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444033","BOREHOLE_TOP_DEPTH_M":221,"BOREHOLE_BASE_DEPTH_M":222,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.6288862168,"LONG_GDA94":131.9159717753,"ELEV_M_AHD":112,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3782","geometry":{"type":"Point","coordinates":[133.88376201,-28.86037094]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3782,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937345","IGSN":"10273/AU1937345","SAMPLENO":1937345,"SAMPLE_ID":"2007371004a","AGE_MA":1578,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6043","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample comes from north of the Karari Shear Zone, in the Mabel Creek Ridge. The rock is a grey, biotite gneiss with a foliation defined by oriented biotite, and a gneissic fabric defined by foliation-parallel leucosomes. In thin-section the rock consists of coarse-grained, polygonal-textured quartz-plagioclase-biotite and minor garnet.","SAMPLING_FEATURE_NAME":"PB 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444034","BOREHOLE_TOP_DEPTH_M":257.4,"BOREHOLE_BASE_DEPTH_M":259.4,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8603709367,"LONG_GDA94":133.8837620083,"ELEV_M_AHD":204,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.613","geometry":{"type":"Point","coordinates":[130.46397107,-12.74279232]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":613,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1928207","IGSN":"10273/AU1928207","SAMPLENO":1928207,"SAMPLE_ID":"FB03IRS002","AGE_MA":1854,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"in situ monazite","AGE_SOURCE":"NTGS STRIKE and Original Reference","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Fog Bay Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"biotite-garnet-muscovite-plagioclase-quartz-sillimanite pelite","SAMPLING_FEATURE_NAME":"FB03IRS002","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH429725","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Litchfield Block","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.7427923195,"LONG_GDA94":130.4639710666,"ELEV_M_AHD":-49,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2019-07-02","AGE_LAST_UPDATED":"2019-07-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3815","geometry":{"type":"Point","coordinates":[132.92294791,-29.91679682]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3815,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945779","IGSN":"10273/AU1945779","SAMPLENO":1945779,"SAMPLE_ID":"R1562449","AGE_MA":2452,"AGE_MA_UNCERTAINTY":17,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.64,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1562449 is a quartz-bearing norite or orthopyroxene diorite. The sample has a granoblastic texture with partly antiperthitic plagioclase and anhedral quartz to 3 mm in grainsize. Quartz shows subgrain development and also lobate grain boundaries, indicative of high-grade metamorphic conditions experienced by this rock. Orthopyroxene and about 2% clinopyroxene are present throughout the rock, being predominantly granular and showing microfracturing. There is also minor opaque oxide. Most of the opaque oxide is deformed and/or ex-ilmenite, with sparse magnetite. There is also rare pyrite. Biotite is present as small, irregular grains that rim the edges of the pyroxenes and also within narrow fractures through the sample. This biotite is likely to have resulted from minor retrogression.","SAMPLING_FEATURE_NAME":"R1562449","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444440","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Christie Domain","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.9167968175,"LONG_GDA94":132.9229479117,"ELEV_M_AHD":154,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-18","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13450","geometry":{"type":"Point","coordinates":[138.80867416,-34.84027506]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13450,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953824","IGSN":"10273/AU1953824","SAMPLENO":1953824,"SAMPLE_ID":"R1009272","AGE_MA":1585,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1009272 was collected from a large road cutting on Gorge Road in the River Torrens gorge, about 0.5 km W of Cudlee Creek, in the southern Houghton Inlier. This lithology is dominated by quartz, biotite, and a fine grained retrograde mineral that is most likely sericite. Coarse quartz and K-feldspar occurs in leucosomes throughout the rock, indicating partial melting has occurred. A subtle layering of quartz rich and quartz poor domains is present and may reflect a primary sedimentary feature. Retrogression of the primary mineral assemblage obscures many of the structures within this rock. Similar quartz-biotite-sericite gneisses occur throughout the southern Houghton Inlier, and structurally overlie (younging uncertain) calcsilicate and quartofeldspathic gneisses. Retrogression is much more extensive in the southern Houghton Inlier than the north, and minor faults and hydrous alteration around quartz veins is common, which often obscures lithological boundaries and sedimentary or metamorphic structures.","SAMPLING_FEATURE_NAME":"R1009272","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450315","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.8402750555,"LONG_GDA94":138.8086741596,"ELEV_M_AHD":277,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1009272 was collected from a large road cutting on Gorge Road in the River Torrens gorge, about 0.5 km W of Cudlee Creek, in the southern Houghton Inlier.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3808","geometry":{"type":"Point","coordinates":[133.37872741,-29.66259577]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3808,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945783","IGSN":"10273/AU1945783","SAMPLENO":1945783,"SAMPLE_ID":"R1562450","AGE_MA":2452,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"In outcrop, the lithologies are very clearly metasedimentary, occurring as metapsammitic to metapelitic units with garnet and biotite being common metamorphic minerals developed within the predominantly quartzofeldspathic lithologies. This mineral assemblage is typical for metapelitic Christie Gneiss and suggests Sleafordian metamorphism reached at least mid-amphibolite facies conditions in this area. In places primary sedimentary layering is well preserved, despite the inferred metamorphic overprint, with gradations between interlayered psammite and pelite observed within vertically dipping layers indicating the original sedimentary units varied from sandstone to muddy sandstone and probably represent shallow water clastic material. Sample R1562450 is a garnet-bearing quartz-feldspar gneiss. Quartz is the dominant mineral in the sample and occurs as large to medium grains, all with irregular, recrystallised boundaries along which subgrains are extensively developed. Plagioclase is subordinate and occurs are recrystallised perthitic grains to 2 mm in diameter. The quartz and plagioclase together show a strong preferred orientation and define a tectonic fabric. Plagioclase is weakly altered to sericite. Garnet, although not present within the thin section cut for this sample, is present in the hand sample as 2-4 cm diameter euhedral crystals randomly occurring throughout the rock. Field descriptions noted that the garnet was concentrated into layers parallel to the bulk lithological layering, suggesting the original variation in bulk composition has permitted the growth of garnet in more pelitic horizons. The sample is interpreted to be metasedimentary, with a quartz-rich, clastic source.","SAMPLING_FEATURE_NAME":"R1562450","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444444","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6625957708,"LONG_GDA94":133.3787274092,"ELEV_M_AHD":152,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-19","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13451","geometry":{"type":"Point","coordinates":[138.80867416,-34.84027506]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13451,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953824","IGSN":"10273/AU1953824","SAMPLENO":1953824,"SAMPLE_ID":"R1009272","AGE_MA":1609,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.56,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1009272 was collected from a large road cutting on Gorge Road in the River Torrens gorge, about 0.5 km W of Cudlee Creek, in the southern Houghton Inlier. This lithology is dominated by quartz, biotite, and a fine grained retrograde mineral that is most likely sericite. Coarse quartz and K-feldspar occurs in leucosomes throughout the rock, indicating partial melting has occurred. A subtle layering of quartz rich and quartz poor domains is present and may reflect a primary sedimentary feature. Retrogression of the primary mineral assemblage obscures many of the structures within this rock. Similar quartz-biotite-sericite gneisses occur throughout the southern Houghton Inlier, and structurally overlie (younging uncertain) calcsilicate and quartofeldspathic gneisses. Retrogression is much more extensive in the southern Houghton Inlier than the north, and minor faults and hydrous alteration around quartz veins is common, which often obscures lithological boundaries and sedimentary or metamorphic structures.","SAMPLING_FEATURE_NAME":"R1009272","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450315","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.8402750555,"LONG_GDA94":138.8086741596,"ELEV_M_AHD":277,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1009272 was collected from a large road cutting on Gorge Road in the River Torrens gorge, about 0.5 km W of Cudlee Creek, in the southern Houghton Inlier.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.607","geometry":{"type":"Point","coordinates":[133.80563476,-26.1513813]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":607,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1926734","IGSN":"10273/AU1926734","SAMPLENO":1926734,"SAMPLE_ID":"R1039161","AGE_MA":1158,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6024","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"High-U, low-Th/U rims reflecting high-grade Mesoproterozoic metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Birksgate Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample has been mapped as recrystallised gneiss (Mr28). This unit retains a relict gneissic layering interpreted to have developed early in the Musgravian Orogeny but has undergone significant recrystallisation and melt mobilisation producing a schollen texture. This unit was considered transitional between the felsic orthogneisses of the Birksgate Complex and the early anatectic granite (Mp21) of the Pitjantjatjara Supersuite. It is a massive, medium-grained, crystalline rock dominated by blocky grains of pink K-feldspar, translucent grains of quartz, and drab greyish cream plagioclase grains. Minor small black mica flakes are distributed sparsely and uniformly through the rock. This sample is considered to have crystallised as a medium-grained massive granitoid, with monzogranitic assemblage of K-feldspar + quartz + plagioclase + minor biotite + trace others (Fe-Ti oxide, apatite, zircon). All zircon crystals contain small cores, overgrown by thin clear mantles. The zircon morphology can be explained as one of two alternative origins: either igneous rims have overgrown relict restite cores from the granitoid magma source region, or metamorphic rims have overgrown primary igneous cores. It is possible that the subhedral shapes of the cores imply an igneous origin for the cores, in turn implying a metamorphic origin for the rims. A difficulty with this origin is that the overall texture of the rock is consistent with an igneous crystallisation origin.","SAMPLING_FEATURE_NAME":"R1039161","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS429101","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.1513812984,"LONG_GDA94":133.8056347564,"ELEV_M_AHD":425,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-10-02","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-24","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13452","geometry":{"type":"Point","coordinates":[138.29634357,-35.47332154]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13452,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953828","IGSN":"10273/AU1953828","SAMPLENO":1953828,"SAMPLE_ID":"R1588242","AGE_MA":1590,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.97,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588242 was collected from a large ridge of quartzite 4 km S of Normanville, in the southernmost exposure of the Myponga inlier, and about 1.5 km NW of sample R695754. The rock collected for analysis is a medium-grained (up to 1 mm), impure quartzite to psammite which varies from 95% to 60% quartz. K-feldspar and biotite make up the remainder, with biotite < 5% of the rock. A weak foliation is observed where biotite is present. The quartzite is one of two quartzite beds which bound a NW-SE trending unit of calc-silicate. The SE extent of this package is bounded by a shear zone displaying extensional kinematics (Morrissey et al. 2013), against which a migmatised garnet-sillimanite gneiss is juxtaposed. This area is intruded by coarse K-feldspar dominated granite and pegmatite intrusions similar to that of sample R695754. In thin section, this sample displays a foliated sutured granoblastic metamorphic texture. Quartz dominates, as large anhedral grains 1-4 mm in size. All are elongated in ductile manner in the trace of a metamorphic foliation, with aspect ratios c. 2:1. All grains display a significant degree of shadowy strain effects, and suturing around grain margins represents incipient recrystallisation of the larger grains. K-feldspar forms small anhedral grains, mostly concentrated around margins of the larger grains. All display the typical \"tartan\" twinning of microcline. Rare biotite forms small flakes c. 100-300 um long, concentrated in small wispy aggregates, with preferred orientation contributing to the metamorphic foliation. Small colourless muscovite/sericite flakes are intergrown with biotite. Opaque oxide minerals form small grains scattered through the rock. Zircon occurs as uncommon small rounded grains < 50 um in size.","SAMPLING_FEATURE_NAME":"R1588242","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450319","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Kanmantoo Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-35.4733215428,"LONG_GDA94":138.2963435724,"ELEV_M_AHD":91,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588242 was collected from a large ridge of quartzite 4 km S of Normanville, in the southernmost exposure of the Myponga inlier, and about 1.5 km NW of sample R695754.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.676","geometry":{"type":"Point","coordinates":[133.30856787,-12.44586259]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":676,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952463","IGSN":"10273/AU1952463","SAMPLENO":1952463,"SAMPLE_ID":"AL07CJC008","AGE_MA":1853,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6143","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":24806,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24806","STRAT_UNIT_NAME":"Cahill Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cahill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of biotite-muscovite-garnet (+quartz and feldspar) schist from the Cahill Formation was sampled for in situ geochronology. The sample is strongly crenulated, with garnets wrapped by a dominant biotite S2 fabric (Figure 63b). This sample was collected for in situ monazite U‑Pb analysis in order to assess the timing of amphibolite facies metamorphism and fabric development.","SAMPLING_FEATURE_NAME":"AL07CJC008","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS449438","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":"Pine Creek Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.4458625866,"LONG_GDA94":133.3085678739,"ELEV_M_AHD":-56,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-13","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68697","AGE_REF":"Kositcin, N., Carson, C.J., Hollis, J.A., Close, D.F., Whelan, J.A., Webb, G., Donnellan, N., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Davenport Province and Pine Creek Orogen July 2009-June 2011. Northern Territory Geological Survey Record, 2012-008, 49p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82461","AGE_ENTRY_DATE":"2012-09-17","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3790","geometry":{"type":"Point","coordinates":[133.88376201,-28.86037094]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3790,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937345","IGSN":"10273/AU1937345","SAMPLENO":1937345,"SAMPLE_ID":"2007371004a","AGE_MA":1723,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6073","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample comes from north of the Karari Shear Zone, in the Mabel Creek Ridge. The rock is a grey, biotite gneiss with a foliation defined by oriented biotite, and a gneissic fabric defined by foliation-parallel leucosomes. In thin-section the rock consists of coarse-grained, polygonal-textured quartz-plagioclase-biotite and minor garnet.","SAMPLING_FEATURE_NAME":"PB 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444034","BOREHOLE_TOP_DEPTH_M":257.4,"BOREHOLE_BASE_DEPTH_M":259.4,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8603709367,"LONG_GDA94":133.8837620083,"ELEV_M_AHD":204,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.677","geometry":{"type":"Point","coordinates":[133.01271942,-11.66134947]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":677,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952661","IGSN":"10273/AU1952661","SAMPLENO":1952661,"SAMPLE_ID":"CP07CJC018","AGE_MA":1855,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6154","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":24806,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24806","STRAT_UNIT_NAME":"Cahill Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cahill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This is a garnet-bearing pelitic biotite schist collected from Cameco drillhole WRPD003 at a depth of 203.29-203.41 m. It has a garnet-staurolite-biotite-muscovite-sillimanite-hematite-magnetite-pyrite-plagioclase-quartz lithology with minor chlorite and tourmaline, and accessory zircon and monazite. Garnet porphyroblasts (0.5-1.0 cm) contain small unoriented inclusions of ilmenite and quartz. Small grains of magnetite and muscovite have formed at the expense of garnet along cracks in the porphyroblasts. Garnet rims are resorbed and replaced by biotite-muscovite-quartz intergrowths along with plagioclase, hematite and pyrite. Biotite in these reaction textures contains abundant small inclusions of zircon and monazite. Hematite is preferentially distributed in the outer parts of the garnet breakdown texture, and staurolite (1-3 mm) in the most distal parts of the reaction texture. Minor chlorite is present in the strain shadows around garnet porphyroblasts. The matrix comprises mainly muscovite, biotite and quartz, and the micas define a weak to moderate schistosity. Staurolite in the matrix is elongate within the schistosity and appears intergrown with, rather than wrapped by, matrix muscovite, biotite and quartz. Finer grained biotite seams (locally with fibrolitic sillimanite), which are often associated with blocky to elongate sillimanite, wrap staurolite, and biotite has been partially replaced by chlorite. This sample was targeted to date the timing of metamorphism by dating the monazite, which appears to be associated with garnet breakdown (ie it is abundant in biotite in the garnet breakdown textures).","SAMPLING_FEATURE_NAME":"CP07CJC018","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH449447","BOREHOLE_TOP_DEPTH_M":203.29,"BOREHOLE_BASE_DEPTH_M":203.41,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-11.6613494655,"LONG_GDA94":133.0127194186,"ELEV_M_AHD":-58,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-13","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68697","AGE_REF":"Kositcin, N., Carson, C.J., Hollis, J.A., Close, D.F., Whelan, J.A., Webb, G., Donnellan, N., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Davenport Province and Pine Creek Orogen July 2009-June 2011. Northern Territory Geological Survey Record, 2012-008, 49p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82461","AGE_ENTRY_DATE":"2012-09-17","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.614","geometry":{"type":"Point","coordinates":[130.51816938,-12.81245593]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":614,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1928208","IGSN":"10273/AU1928208","SAMPLENO":1928208,"SAMPLE_ID":"DA03IRS001","AGE_MA":1813,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.7,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"identical weighted mean and Tukey's Biweight","AGE_SOURCE":"NTGS STRIKE and Original Reference","PROJECT":null,"STRATNO":19716,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU19716","STRAT_UNIT_NAME":"Welltree Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Welltree Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sampled from drill core LKN19, stored at NTGS core library, Darwin","SAMPLING_FEATURE_NAME":"DA03IRS001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH430961","BOREHOLE_TOP_DEPTH_M":81,"BOREHOLE_BASE_DEPTH_M":81.1,"GEOLOGICAL_PROVINCE":"Litchfield Block","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.8124559342,"LONG_GDA94":130.518169378,"ELEV_M_AHD":-49,"ACCURACY_M":100,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2019-07-02","AGE_LAST_UPDATED":"2019-07-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.615","geometry":{"type":"Point","coordinates":[130.55500282,-14.00453086]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":615,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1928231","IGSN":"10273/AU1928231","SAMPLENO":1928231,"SAMPLE_ID":"FE03IRS001","AGE_MA":1855,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.2,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"NTGS STRIKE and Original Reference","PROJECT":null,"STRATNO":8293,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8293","STRAT_UNIT_NAME":"Hermit Creek Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Hermit Creek Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"cordierite-biotite-kfeldspar-plagioclase-garnet-quartz migmatite, bedding intact, grading locally visible.","SAMPLING_FEATURE_NAME":"FE03IRS001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS431003","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Litchfield Block","GEOLOGICAL_REGION_NAME":"Litchfield Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-14.0045308614,"LONG_GDA94":130.5550028186,"ELEV_M_AHD":-44,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2019-07-02","AGE_LAST_UPDATED":"2019-07-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1480","geometry":{"type":"Point","coordinates":[135.07245947,-23.06860329]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1480,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945965","IGSN":"10273/AU1945965","SAMPLENO":1945965,"SAMPLE_ID":"IC07JAW232","AGE_MA":1717,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6040","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79088,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79088","STRAT_UNIT_NAME":"Entia Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Migmatitic Garnet-Bearing Metapelite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This is a migmatised garnet, silliminite, biotite schist, containing garnet porphyroclasts c. 2 cm across.  The sample sent (IC07JAW232) is taken from the more quartz-rich component of the rock.  In the field outcrop is intermittent and quite weathered covering an area of approximately 4 x 15 m, no direct contact with other lithologies was observed.  This unit crops out in the western Entia Dome (Figure 1) as a metasedimentary package within the orthogneiss dominated Palaeoproterozoic Entia Gneiss Complex (EGC).","SAMPLING_FEATURE_NAME":"IC07JAW232","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444942","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.0686032917,"LONG_GDA94":135.0724594651,"ELEV_M_AHD":-24,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67479","AGE_REF":"Carson, C.J., Hollis, J.A., Glass, L.M., Close, D.F., Whelan, J.A., Wygralak, A., 2011. Summary of results. Joint NTGS-GA geochronology project: East Arunta Region, Pine Creek Orogen and Murphy Inlier, July 2007-June 2009. Northern Territory Geological Survey Record, 2010-004, 84p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82453","AGE_ENTRY_DATE":"2013-06-28","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3791","geometry":{"type":"Point","coordinates":[133.88376201,-28.86037094]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3791,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937345","IGSN":"10273/AU1937345","SAMPLENO":1937345,"SAMPLE_ID":"2007371004a","AGE_MA":1577,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6073","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample comes from north of the Karari Shear Zone, in the Mabel Creek Ridge. The rock is a grey, biotite gneiss with a foliation defined by oriented biotite, and a gneissic fabric defined by foliation-parallel leucosomes. In thin-section the rock consists of coarse-grained, polygonal-textured quartz-plagioclase-biotite and minor garnet.","SAMPLING_FEATURE_NAME":"PB 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444034","BOREHOLE_TOP_DEPTH_M":257.4,"BOREHOLE_BASE_DEPTH_M":259.4,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8603709367,"LONG_GDA94":133.8837620083,"ELEV_M_AHD":204,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3781","geometry":{"type":"Point","coordinates":[133.82731618,-28.81995544]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3781,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937350","IGSN":"10273/AU1937350","SAMPLENO":1937350,"SAMPLE_ID":"2007371005c","AGE_MA":1579,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":31,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6043","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This rock is a garnet-bearing felsic gneiss, consisting of polygonal-textured quartz-plagioclase-garnet-biotite, with a foliation defined by oriented biotite. Garnet contains needle-like inclusions of sillimanite forming inclusion trails, but not consistent in orientation throughout a thin-section. No sillimanite is observed outside garnet, in the matrix. Abundant zircon is visible in thin-section.","SAMPLING_FEATURE_NAME":"PB 2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444035","BOREHOLE_TOP_DEPTH_M":396.2,"BOREHOLE_BASE_DEPTH_M":397.9,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8199554356,"LONG_GDA94":133.827316183,"ELEV_M_AHD":203,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.616","geometry":{"type":"Point","coordinates":[130.58524384,-14.03793261]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":616,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1928232","IGSN":"10273/AU1928232","SAMPLENO":1928232,"SAMPLE_ID":"FE05CJC001","AGE_MA":1853,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.2,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"NTGS STRIKE and Original Reference","PROJECT":null,"STRATNO":8293,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8293","STRAT_UNIT_NAME":"Hermit Creek Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Hermit Creek Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Cordierite-biotite-kfeldspar-plagioclase-quartz-garnet migmatite, bedding intact and metamorphic induced reverse graded bedding locally observed.","SAMPLING_FEATURE_NAME":"FE05CJC001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS431007","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Litchfield Block","GEOLOGICAL_REGION_NAME":"Litchfield Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-14.0379326055,"LONG_GDA94":130.5852438396,"ELEV_M_AHD":-44,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2019-07-02","AGE_LAST_UPDATED":"2019-07-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13457","geometry":{"type":"Point","coordinates":[138.91582843,-34.71068352]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13457,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953827","IGSN":"10273/AU1953827","SAMPLENO":1953827,"SAMPLE_ID":"R1588241","AGE_MA":1589,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.65,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588241 is a muscovite-biotite psammopelite with a strong gneissic fabric segregating quartzofeldspathic and micaceous minerals, forming 0.5-1.0 cm bands. Quartz-rich layers up to 5 cm thick, possibly a relict sedimentary feature, closely follow the gneissic layering. Thin leucosomes, several centimetres thick, parallel the gneissic foliation, and in some places are boudinaged. Larger pegmatites which cross the foliation are common in the surrounding area. The gneissosity of this rock has been multiply deformed. Larger wavelength folds commonly overprint older crenulations, indicating at least 2 folding events. The sampled psammopelite grades into a structurally overlying muscovite sillimanite schist to the south. The Warren Inlier lies within the sillimanite isograd of the Delamerian Orogen, and is positioned in an area of intense deformation as mapped by Mills (1973). In thin section, this sample displays a foliated granoblastic metamorphic texture with spaced phyllosilicate laminae. Abundant plagioclase forms anhedral unzoned grains from c. 0.2 mm to 2 mm with a range of grain shapes, suggesting that varied degrees of equilibration of primary plagioclase occurred during metamorphism. Muscovite forms colourless well-shaped plates c. 1.0-1.5 mm long, mostly concentrated in muscovite-rich laminae c. 0.5-2.0 mm thick which are spaced through the rock c. 1-2 mm apart. A strong foliation is defined by preferred orientation of the muscovite laminae and the muscovite flakes within the laminae. Biotite forms well-shaped plates similar in size to muscovite, mostly within the plagioclase-rich laminae. Minor chlorite forms pleochroic pale green flakes interleaved with biotite and muscovite. Minor quartz forms anhedral equant grains in equilibrium with adjacent plagioclase. Accessory minerals include rutile (as euhedral c. 100-200 um crystals), monazite (c. 100 um), and zircon as tiny rounded inclusions in biotite, enclosed in radiation haloes.","SAMPLING_FEATURE_NAME":"R1588241","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450318","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.7106835202,"LONG_GDA94":138.9158284291,"ELEV_M_AHD":380,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588241 was collected from the South Para River in the Warren Inlier, about 3.5 km SE of Williamstown and 400 m downstream from the Warren Reservoir dam.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1485","geometry":{"type":"Point","coordinates":[134.74707734,-22.88428946]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1485,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1950647","IGSN":"10273/AU1950647","SAMPLENO":1950647,"SAMPLE_ID":"AC07LCV412","AGE_MA":1711,"AGE_MA_UNCERTAINTY":21,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.01,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6042","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"un-named felsic gneiss","UNIT_NAME_SOURCE":"Queenie Flat Granite Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Garnet-absent probable orthogneiss (?Stanovos) within pelitic/mafic Irindina metamorphic package, from which Buick et al. got Ordovician ages in this area. Protolith Proterozoic or Ordovician (Stanovos)? Also rim ages if possible.","SAMPLING_FEATURE_NAME":"AC07LCV412","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS447694","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8842894618,"LONG_GDA94":134.7470773421,"ELEV_M_AHD":-25,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mallee Bore area","SAMPLE_ACQUISITION_DATE":"2007-11-10","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.675","geometry":{"type":"Point","coordinates":[133.18670402,-12.46296554]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":675,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952382","IGSN":"10273/AU1952382","SAMPLENO":1952382,"SAMPLE_ID":"AL04CJC004","AGE_MA":1862,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6045","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"All near-concordant analyses, Grouping of analyses based on textural location or compositional variation results in statistically identical ages.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":24806,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24806","STRAT_UNIT_NAME":"Cahill Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cahill Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"A sample of garnet-staurolite-biotite (+/- chlorite) schist, logged as the Cahill Formation, was sampled from Cameco drillhole EMA 1 (154.45 m). The sample displays a well-developed schistose fabric with a shallow to moderate dip, overprinted by a weak upright crenulation.","SAMPLING_FEATURE_NAME":"AL04CJC004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH449390","BOREHOLE_TOP_DEPTH_M":154.4,"BOREHOLE_BASE_DEPTH_M":154.4,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.4629655355,"LONG_GDA94":133.1867040207,"ELEV_M_AHD":-56,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2004-09-04","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68697","AGE_REF":"Kositcin, N., Carson, C.J., Hollis, J.A., Close, D.F., Whelan, J.A., Webb, G., Donnellan, N., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Davenport Province and Pine Creek Orogen July 2009-June 2011. Northern Territory Geological Survey Record, 2012-008, 49p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82461","AGE_ENTRY_DATE":"2013-07-23","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3809","geometry":{"type":"Point","coordinates":[133.37872741,-29.66259577]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3809,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1945783","IGSN":"10273/AU1945783","SAMPLENO":1945783,"SAMPLE_ID":"R1562450","AGE_MA":2469,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.1,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6035","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"In outcrop, the lithologies are very clearly metasedimentary, occurring as metapsammitic to metapelitic units with garnet and biotite being common metamorphic minerals developed within the predominantly quartzofeldspathic lithologies. This mineral assemblage is typical for metapelitic Christie Gneiss and suggests Sleafordian metamorphism reached at least mid-amphibolite facies conditions in this area. In places primary sedimentary layering is well preserved, despite the inferred metamorphic overprint, with gradations between interlayered psammite and pelite observed within vertically dipping layers indicating the original sedimentary units varied from sandstone to muddy sandstone and probably represent shallow water clastic material. Sample R1562450 is a garnet-bearing quartz-feldspar gneiss. Quartz is the dominant mineral in the sample and occurs as large to medium grains, all with irregular, recrystallised boundaries along which subgrains are extensively developed. Plagioclase is subordinate and occurs are recrystallised perthitic grains to 2 mm in diameter. The quartz and plagioclase together show a strong preferred orientation and define a tectonic fabric. Plagioclase is weakly altered to sericite. Garnet, although not present within the thin section cut for this sample, is present in the hand sample as 2-4 cm diameter euhedral crystals randomly occurring throughout the rock. Field descriptions noted that the garnet was concentrated into layers parallel to the bulk lithological layering, suggesting the original variation in bulk composition has permitted the growth of garnet in more pelitic horizons. The sample is interpreted to be metasedimentary, with a quartz-rich, clastic source.","SAMPLING_FEATURE_NAME":"R1562450","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS444444","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6625957708,"LONG_GDA94":133.3787274092,"ELEV_M_AHD":152,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-19","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13458","geometry":{"type":"Point","coordinates":[138.91582843,-34.71068352]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13458,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953827","IGSN":"10273/AU1953827","SAMPLENO":1953827,"SAMPLE_ID":"R1588241","AGE_MA":1612,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588241 is a muscovite-biotite psammopelite with a strong gneissic fabric segregating quartzofeldspathic and micaceous minerals, forming 0.5-1.0 cm bands. Quartz-rich layers up to 5 cm thick, possibly a relict sedimentary feature, closely follow the gneissic layering. Thin leucosomes, several centimetres thick, parallel the gneissic foliation, and in some places are boudinaged. Larger pegmatites which cross the foliation are common in the surrounding area. The gneissosity of this rock has been multiply deformed. Larger wavelength folds commonly overprint older crenulations, indicating at least 2 folding events. The sampled psammopelite grades into a structurally overlying muscovite sillimanite schist to the south. The Warren Inlier lies within the sillimanite isograd of the Delamerian Orogen, and is positioned in an area of intense deformation as mapped by Mills (1973). In thin section, this sample displays a foliated granoblastic metamorphic texture with spaced phyllosilicate laminae. Abundant plagioclase forms anhedral unzoned grains from c. 0.2 mm to 2 mm with a range of grain shapes, suggesting that varied degrees of equilibration of primary plagioclase occurred during metamorphism. Muscovite forms colourless well-shaped plates c. 1.0-1.5 mm long, mostly concentrated in muscovite-rich laminae c. 0.5-2.0 mm thick which are spaced through the rock c. 1-2 mm apart. A strong foliation is defined by preferred orientation of the muscovite laminae and the muscovite flakes within the laminae. Biotite forms well-shaped plates similar in size to muscovite, mostly within the plagioclase-rich laminae. Minor chlorite forms pleochroic pale green flakes interleaved with biotite and muscovite. Minor quartz forms anhedral equant grains in equilibrium with adjacent plagioclase. Accessory minerals include rutile (as euhedral c. 100-200 um crystals), monazite (c. 100 um), and zircon as tiny rounded inclusions in biotite, enclosed in radiation haloes.","SAMPLING_FEATURE_NAME":"R1588241","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450318","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.7106835202,"LONG_GDA94":138.9158284291,"ELEV_M_AHD":380,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588241 was collected from the South Para River in the Warren Inlier, about 3.5 km SE of Williamstown and 400 m downstream from the Warren Reservoir dam.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3792","geometry":{"type":"Point","coordinates":[133.82731618,-28.81995544]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3792,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937350","IGSN":"10273/AU1937350","SAMPLENO":1937350,"SAMPLE_ID":"2007371005c","AGE_MA":1580,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6073","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This rock is a garnet-bearing felsic gneiss, consisting of polygonal-textured quartz-plagioclase-garnet-biotite, with a foliation defined by oriented biotite. Garnet contains needle-like inclusions of sillimanite forming inclusion trails, but not consistent in orientation throughout a thin-section. No sillimanite is observed outside garnet, in the matrix. Abundant zircon is visible in thin-section.","SAMPLING_FEATURE_NAME":"PB 2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444035","BOREHOLE_TOP_DEPTH_M":396.2,"BOREHOLE_BASE_DEPTH_M":397.9,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8199554356,"LONG_GDA94":133.827316183,"ELEV_M_AHD":203,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67980","AGE_REF":"Fraser, G., Reid, A., Stern, R., 2012. Timing of deformation and exhumation across the Karari Shear Zone, north-western Gawler Craton, South Australia. Australian Journal of Earth Sciences, 59(4), 547-570.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.678586","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13456","geometry":{"type":"Point","coordinates":[138.91582843,-34.71068352]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13456,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953827","IGSN":"10273/AU1953827","SAMPLENO":1953827,"SAMPLE_ID":"R1588241","AGE_MA":520,"AGE_MA_UNCERTAINTY":39,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588241 is a muscovite-biotite psammopelite with a strong gneissic fabric segregating quartzofeldspathic and micaceous minerals, forming 0.5-1.0 cm bands. Quartz-rich layers up to 5 cm thick, possibly a relict sedimentary feature, closely follow the gneissic layering. Thin leucosomes, several centimetres thick, parallel the gneissic foliation, and in some places are boudinaged. Larger pegmatites which cross the foliation are common in the surrounding area. The gneissosity of this rock has been multiply deformed. Larger wavelength folds commonly overprint older crenulations, indicating at least 2 folding events. The sampled psammopelite grades into a structurally overlying muscovite sillimanite schist to the south. The Warren Inlier lies within the sillimanite isograd of the Delamerian Orogen, and is positioned in an area of intense deformation as mapped by Mills (1973). In thin section, this sample displays a foliated granoblastic metamorphic texture with spaced phyllosilicate laminae. Abundant plagioclase forms anhedral unzoned grains from c. 0.2 mm to 2 mm with a range of grain shapes, suggesting that varied degrees of equilibration of primary plagioclase occurred during metamorphism. Muscovite forms colourless well-shaped plates c. 1.0-1.5 mm long, mostly concentrated in muscovite-rich laminae c. 0.5-2.0 mm thick which are spaced through the rock c. 1-2 mm apart. A strong foliation is defined by preferred orientation of the muscovite laminae and the muscovite flakes within the laminae. Biotite forms well-shaped plates similar in size to muscovite, mostly within the plagioclase-rich laminae. Minor chlorite forms pleochroic pale green flakes interleaved with biotite and muscovite. Minor quartz forms anhedral equant grains in equilibrium with adjacent plagioclase. Accessory minerals include rutile (as euhedral c. 100-200 um crystals), monazite (c. 100 um), and zircon as tiny rounded inclusions in biotite, enclosed in radiation haloes.","SAMPLING_FEATURE_NAME":"R1588241","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450318","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.7106835202,"LONG_GDA94":138.9158284291,"ELEV_M_AHD":380,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588241 was collected from the South Para River in the Warren Inlier, about 3.5 km SE of Williamstown and 400 m downstream from the Warren Reservoir dam.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3997","geometry":{"type":"Point","coordinates":[133.51266211,-30.30262314]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3997,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1987335","IGSN":"10273/AU1987335","SAMPLENO":1987335,"SAMPLE_ID":"R1562986","AGE_MA":2428,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.55,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6085","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R1562986 is a coarse grained, migmatised, quartz-plagioclase-microcline-cordierite-garnet gneiss from drillhole CD-1. At the hand specimen scale, layering is defined by alignment of biotite in melanocratic microlithons. Garnet porphyroblasts are coarse grained, up to 4 cm wide, and are typically elongate parallel to the main gneissic foliation. Quartz-feldspar is developed as leucocratic segregations adjacent many of the garnets, most likely indicating the garnet has grown via biotite breakdown reaction with the production of quartz-feldspar melt associated with this reaction. In thin section, quartz shows both polygonal-textured, coarse-grained forms, and also some zones of medium- to fine-grained recrystallisation. Quartz grain boundaries are typically lobate, indicative of high temperature recrystallisation. Feldspar occurs as both plagioclase and microcline, with the former the dominant species and the latter being perthitic in nature. Numerous examples of myrmekite are observed, also indicative of high temperature metamorphic conditions. Garnet occurs as coarse grained, anhedral porphyroblasts that show quartz +/- biotite inclusions and are typically rimmed by light brown biotite that is most likely a product of retrograde breakdown of garnet. Cordierite is also seen in thin section as coarse grains intergrown with quartz and in some instances with fine-grained biotite (+/- sillimanite?) rims. Opaque species, possibly ilmenite, are common as irregular shaped grains within the quartz-feldspar matrix. Zircon and monazite is abundant within the rock, with the former occurring as large euhedral to subhedral grains, often with prominent radiation damage halos within biotite.","SAMPLING_FEATURE_NAME":"Mt Christie CD-1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444927","BOREHOLE_TOP_DEPTH_M":105.99,"BOREHOLE_BASE_DEPTH_M":106.93,"GEOLOGICAL_PROVINCE":"Cleve Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.3026231377,"LONG_GDA94":133.5126621104,"ELEV_M_AHD":205,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.686","geometry":{"type":"Point","coordinates":[148.22259076,-20.62905598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":686,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953976","IGSN":"10273/AU1953976","SAMPLENO":1953976,"SAMPLE_ID":"200701514","AGE_MA":288.3,"AGE_MA_UNCERTAINTY":3.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.43,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":"GA6247","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 298-276 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":75659,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU75659","STRAT_UNIT_NAME":"Key Creek Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Key Creek Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample of biotite paragneiss was collected from an outcrop in a creek bed ~50 m N of Normanby Road, on Sutherland station ~40 km SSE of Collinsville. The Key Creek Gneiss forms an extensive (~265 km2) metamorphic complex located in the centre of the Urannah Batholith. The rocks within the complex are mainly upper amphibolite-grade paragneisses, which have a distinctive elevated thorium response on radiometric images. The analysed sample comprises mainly quartz, feldspar, andalusite (commonly extensively altered), biotite and muscovite, with minor garnet, traces of apatite, zircon, and monazite, and scattered quartz inclusions. Previous geochronology on this sample includes SHRIMP U-Pb zircon analysis and Isotope Dilution Thermal Ionisation Mass Spectrometry (ID-TIMS) U-Pb monazite analyses (sample 1953976/RJB2913; Cross et al. 2012a). SHRIMP U-Pb zircon geochronology of two Key Creek Gneiss samples reported by Cross et al. (2012a) gave metamorphic ages of 297.0 +/- 2.7 Ma and 298.2 +/- 6.9 Ma (samples: 1980488/BB4952, 1953976/RJB2913 respectively).These SHRIMP U-Pb zircon ages, derived from analyses of low Th/U metamorphic rims, are in contrast to the ID-TIMS U-Pb monazite age determination for one of these samples (1953976/RJB2913) which gave an age of 291.0 +/- 0.9 Ma (Cross et al. 2012a). These ages led Cross et al. (2012a) to suggest that metamorphism within the metamorphic complex, was a protracted event between ~300 Ma and ~290 Ma. The IDTIMS U-Pb monazite age determination of 291.0 +/- 0.9 Ma reported for sample 1953976/RJB2913 (Cross et al., 2012a) is, however, somewhat equivocal as three of the six fractions analysed were interpreted to have possibly undergone Pb-loss, and were consequently not used in the age calculation. Therefore, an additional isotopic study of these monazites was undertaken by SHRIMP U-Pb to further examine the metamorphic crystallisation age of these grains.","SAMPLING_FEATURE_NAME":"200701514","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS451604","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.62905598,"LONG_GDA94":148.2225907619,"ELEV_M_AHD":469,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-29","SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70673","AGE_REF":"Cross, A.J., Purdy, D.J., Bultitude, R.J., Brown, D.D., Carr, P.A., 2016. Summary of results - Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen, Mossman Orogen and Mount Isa region, 2011-2013. Queensland Geological Record, 2016/03, 142p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr096974","AGE_ENTRY_DATE":"2016-02-24","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.628","geometry":{"type":"Point","coordinates":[143.96209794,-18.5734716]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":628,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937160","IGSN":"10273/AU1937160","SAMPLENO":1937160,"SAMPLE_ID":"2007169011","AGE_MA":1554,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6046","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 1563-1551 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Granitic Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from Stockman Creek, south of the Einasleigh-Forsayth Road, ~15 km southwest of Einasleigh, in the Etheridge Province, Queensland. A previous zircon geochronology study undertaken by Black et al. (1998) included a sample collected from the same creek section. In that study, an igneous crystallisation age of 1675 +/- 3 Ma was reported for an amphibolite sample, which also recorded zircon overgrowths at 1553 +/- 3 Ma. For the current study, a quartz+feldspar+hornblende granitic gneiss with a strong foliation was sampled from the same creek pavement outcrop.","SAMPLING_FEATURE_NAME":"2007169011","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS443132","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.5734716029,"LONG_GDA94":143.962097944,"ELEV_M_AHD":513,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67341","AGE_REF":"Neumann, N.L., Kositcin, N., 2011. New SHRIMP U-Pb zircon ages from North Queensland 2007-2010. Geoscience Australia. Record, 2011/38, 82p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/72648","AGE_ENTRY_DATE":"2013-10-08","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.631","geometry":{"type":"Point","coordinates":[143.96441658,-18.56247467]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":631,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1937161","IGSN":"10273/AU1937161","SAMPLENO":1937161,"SAMPLE_ID":"2007169012","AGE_MA":1559,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.12,"NUMBER_OF_ANALYSES":22,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6046","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Lower Th/U ratio group.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":6018,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6018","STRAT_UNIT_NAME":"Einasleigh Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Einasleigh Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from Stockman Creek south of the Einasleigh-Forsayth Road, ~15 km southwest of Einasleigh, in the Etheridge Province, Queensland. The sample was collected from a creek pavement outcrop within the Einasleigh Metamorphics, and is a psammitic biotite+quartz gneiss, which is crosscut by migmatitic layers up to 1m thick.","SAMPLING_FEATURE_NAME":"2007169012","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS443133","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Georgetown Block","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.5624746695,"LONG_GDA94":143.9644165837,"ELEV_M_AHD":492,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67341","AGE_REF":"Neumann, N.L., Kositcin, N., 2011. New SHRIMP U-Pb zircon ages from North Queensland 2007-2010. Geoscience Australia. Record, 2011/38, 82p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/72648","AGE_ENTRY_DATE":"2013-09-13","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.672","geometry":{"type":"Point","coordinates":[133.3526844,-12.55295017]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":672,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1946255","IGSN":"10273/AU1946255","SAMPLENO":1946255,"SAMPLE_ID":"AL07JHO201","AGE_MA":1871,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":26,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6049","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":27515,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27515","STRAT_UNIT_NAME":"Myra Falls Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Pelitic Migmatite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Small sample of cd-bearing leucosome from migmatitic pelitic gneiss from drill core, Caramal Inlier. Drill hole number TCSHD0030. Interval 278.95-279.13 and 229.8-230 m (two samples of cd-bearing leucosome combined from continuous section of metasediments). Drilled by Cameco. Sampled by J. Hollis NTGS for SHRIMP geochronology","SAMPLING_FEATURE_NAME":"AL07JHO201","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH445170","BOREHOLE_TOP_DEPTH_M":278.95,"BOREHOLE_BASE_DEPTH_M":279.13,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.5529501689,"LONG_GDA94":133.352684404,"ELEV_M_AHD":-56,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-12","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67479","AGE_REF":"Carson, C.J., Hollis, J.A., Glass, L.M., Close, D.F., Whelan, J.A., Wygralak, A., 2011. Summary of results. Joint NTGS-GA geochronology project: East Arunta Region, Pine Creek Orogen and Murphy Inlier, July 2007-June 2009. Northern Territory Geological Survey Record, 2010-004, 84p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82453","AGE_ENTRY_DATE":"2013-06-28","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1486","geometry":{"type":"Point","coordinates":[134.74707734,-22.88428946]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1486,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1950647","IGSN":"10273/AU1950647","SAMPLENO":1950647,"SAMPLE_ID":"AC07LCV412","AGE_MA":486,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.33,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6042","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"un-named felsic gneiss","UNIT_NAME_SOURCE":"Queenie Flat Granite Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Garnet-absent probable orthogneiss (?Stanovos) within pelitic/mafic Irindina metamorphic package, from which Buick et al. got Ordovician ages in this area. Protolith Proterozoic or Ordovician (Stanovos)? Also rim ages if possible.","SAMPLING_FEATURE_NAME":"AC07LCV412","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS447694","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8842894618,"LONG_GDA94":134.7470773421,"ELEV_M_AHD":-25,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mallee Bore area","SAMPLE_ACQUISITION_DATE":"2007-11-10","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1487","geometry":{"type":"Point","coordinates":[135.43181538,-24.06087751]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1487,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1950649","IGSN":"10273/AU1950649","SAMPLENO":1950649,"SAMPLE_ID":"HA07DFC207","AGE_MA":1750,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6044","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed pelitic schist","UNIT_NAME_SOURCE":"Unnamed Pelitic Schist","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HA07DFC207 is a pelitic schist collected from the eastern Casey Inlier (Aileron Province), a region dominated by high-grade metasedimentary units and felsic intrusive rocks (Close et al 2007). The eastern domain comprises metasedimentary rocks that include metapelite, metapsammite, quartz-magnetite layers, graphite-bearing calc-silicate rock and marble, together with mafic to ultramafic units and biotite granite. These lithologies have all been pervasively overprinted by an upper amphibolite facies NW – SE-trending fabric (Close et al 2007). SHRIMP U‑Pb zircon dating of the metasedimentary rocks in the eastern domain yielded an interpreted maximum deposition age of 1845 +/- 6 Ma, whereas dating of a representative sample of the felsic intrusives of this zone yielded a magmatic age of 1817 +- 4 Ma (Worden et al 2008a).","SAMPLING_FEATURE_NAME":"HA07DFC207","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS447729","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Amadeus Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-24.0608775111,"LONG_GDA94":135.4318153803,"ELEV_M_AHD":-20,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-11-13","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68697","AGE_REF":"Kositcin, N., Carson, C.J., Hollis, J.A., Close, D.F., Whelan, J.A., Webb, G., Donnellan, N., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Davenport Province and Pine Creek Orogen July 2009-June 2011. Northern Territory Geological Survey Record, 2012-008, 49p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82461","AGE_ENTRY_DATE":"2012-09-17","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1488","geometry":{"type":"Point","coordinates":[135.43181538,-24.06087751]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1488,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1950649","IGSN":"10273/AU1950649","SAMPLENO":1950649,"SAMPLE_ID":"HA07DFC207","AGE_MA":1733,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.7,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6044","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed pelitic schist","UNIT_NAME_SOURCE":"Unnamed Pelitic Schist","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HA07DFC207 is a pelitic schist collected from the eastern Casey Inlier (Aileron Province), a region dominated by high-grade metasedimentary units and felsic intrusive rocks (Close et al 2007). The eastern domain comprises metasedimentary rocks that include metapelite, metapsammite, quartz-magnetite layers, graphite-bearing calc-silicate rock and marble, together with mafic to ultramafic units and biotite granite. These lithologies have all been pervasively overprinted by an upper amphibolite facies NW – SE-trending fabric (Close et al 2007). SHRIMP U‑Pb zircon dating of the metasedimentary rocks in the eastern domain yielded an interpreted maximum deposition age of 1845 +/- 6 Ma, whereas dating of a representative sample of the felsic intrusives of this zone yielded a magmatic age of 1817 +- 4 Ma (Worden et al 2008a).","SAMPLING_FEATURE_NAME":"HA07DFC207","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS447729","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Amadeus Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-24.0608775111,"LONG_GDA94":135.4318153803,"ELEV_M_AHD":-20,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-11-13","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68697","AGE_REF":"Kositcin, N., Carson, C.J., Hollis, J.A., Close, D.F., Whelan, J.A., Webb, G., Donnellan, N., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Davenport Province and Pine Creek Orogen July 2009-June 2011. Northern Territory Geological Survey Record, 2012-008, 49p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82461","AGE_ENTRY_DATE":"2012-09-17","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13454","geometry":{"type":"Point","coordinates":[138.8740777,-34.98953238]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13454,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953826","IGSN":"10273/AU1953826","SAMPLENO":1953826,"SAMPLE_ID":"R1588240","AGE_MA":1612,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Number of analyses corresponds to the middle component (49% of the population) derived from 3-component mixture modelling of 48 analyses.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from a small outcrop in a drainage depression near Downers Road, approximately 2 km east of the Oakbank township, on the eastern limit of the Oakbank inlier. It is a biotite-rich schist, with a fine-grained quartz and K-feldspar groundmass. Biotite defines a well-developed foliation which is deformed into open folds at the outcrop scale. The groundmass of quartz and feldspars is fine grained, averaging 0.5 mm grain sizes, with some coarse K-feldspar crystals up to 5 mm which are wrapped by the biotite foliation. This sample site is weathered and friable which casts some uncertainty on the identification of the fine grained groundmass minerals in hand specimen. The metasediments of the Oakbank Inlier are poorly exposed and have not been mapped or described in any detail previously. This inlier is intruded by the 856 +/- 20 Ma granite of Preiss et al. (2008), as well as a large pegmatite dykes of an unknown age. The Oakbank Inlier lies within the andalusite-staurolite isograd of the Delamerian Orogen which makes a potential Cambrian overprint or retrogression likely. In thin section, this sample displays a foliated granoblastic metamorphic texture with indistinct mineralogical banding. Plagioclase is abundant, forming equant anhedral grains mostly c. 0.4 mm in size, with sharp grain contacts and triple-grain junctions approaching 120 degrees. The resulting granoblastic mosaic suggests more-or-less equilibrium recrystallisation at elevated P-T conditions.  Biotite is the other principal mineral. It forms well-shaped plates mostly c. 0.5-1.0 mm long. Their strong preferred orientation contributes to a strong penetrative foliation. Chlorite occurs in minor amount as small pleochroic green flakes, interleaved with some of the biotite plates. Opaques occur in minor amount as bladed crystals c. 0.2-0.5 mm long. A feldspathic siltstone is considered a likely protolith.","SAMPLING_FEATURE_NAME":"R1588240","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450317","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9895323761,"LONG_GDA94":138.8740777015,"ELEV_M_AHD":408,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588240 was collected from a small outcrop in a drainage depression near Downers Road, about 2 km E of Oakbank township, on the E limit of the Oakbank Inlier.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":"2022-11-26"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3498","geometry":{"type":"Point","coordinates":[139.47269446,-30.14241557]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3498,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952109","IGSN":"10273/AU1952109","SAMPLENO":1952109,"SAMPLE_ID":"2007379007","AGE_MA":1547,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6051","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Pink, equigranular medium-grained K-feldspar granite gneiss, weakly deformed","SAMPLING_FEATURE_NAME":"2007379007","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448971","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1424155685,"LONG_GDA94":139.4726944567,"ELEV_M_AHD":215,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-20","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3510","geometry":{"type":"Point","coordinates":[139.41140232,-30.1606266]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3510,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952110","IGSN":"10273/AU1952110","SAMPLENO":1952110,"SAMPLE_ID":"2007379008","AGE_MA":458,"AGE_MA_UNCERTAINTY":5.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6052","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"White-black, equigranular medium grained granodiorite with weak biotite fabric, very minimal migmatisation melt","SAMPLING_FEATURE_NAME":"2007379008","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448972","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Mount Painter Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1606266041,"LONG_GDA94":139.4114023153,"ELEV_M_AHD":341,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-21","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13459","geometry":{"type":"Point","coordinates":[138.77775076,-34.97182285]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13459,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953829","IGSN":"10273/AU1953829","SAMPLENO":1953829,"SAMPLE_ID":"R1588243","AGE_MA":1633,"AGE_MA_UNCERTAINTY":15,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6054","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1588243 was collected from the NE Aldgate Inlier, adjacent to Greenhill Road about 5 km N of Bridgewater and is a psammite layer within a weathered sillimanite-bearing gneiss. The psammite is coarse grained (up to 2 mm) and dominated by quartz with minor weathered feldspar. The surrounding pelites clearly preserve a sillimanite- and mica-dominated assemblage. The mica species are difficult to identify due to weathering, however biotite is a likely constituent due to iron oxide staining, with finer-grained muscovite which may be related to retrogression. Leucosomes are uncommon but are observed on a 2-5 cm scale, and parallel a weak gneissosity defined by segregation of quartzofeldspathic and pelitic minerals. The basement rock at the sample location is directly overlain 50 m away by the basal units of the Neoproterozoic Aldgate Sandstone, which in this location feature a strong cleavage, which is also observed in the basement lithology. In thin section, sample R1588243 displays a partly preserved foliated and mineralogically banded texture, severely modified by subsequent pervasive alteration. Quartz occurs in significant amount as anhedral grains which range from c. 0.4 mm up to 4 mm. Smaller grains and larger grains tend to be concentrated in indistinct subparallel bands many millimetres thick, which defines mineralogical and grain size banding. White mica is abundant and occurs as aligned plates scattered throughout through the rock, and their preferred orientation defines a foliation subparallel to the mineralogical banding defined by quartz grains. However most white mica occurs as tiny anhedral grains with random orientation, forming a fine-grained  pervasive mat throughout the rock. It is readily interpreted as a pervasive alteration phase. Opaque oxide minerals occur in significant amount as grains c. 0.4-1.0 mm in size. Tourmaline and zircon occur in trace amounts.","SAMPLING_FEATURE_NAME":"R1588243","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS450320","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.971822851,"LONG_GDA94":138.7777507562,"ELEV_M_AHD":520,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample R1588243 was collected from the NE Aldgate Inlier, adjacent to Greenhill Road about 5 km N of Bridgewater.","SAMPLE_ACQUISITION_DATE":"2008-02-12","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-21","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.554","geometry":{"type":"Point","coordinates":[123.132079,-22.92158982]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":554,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1924595","IGSN":"10273/AU1924595","SAMPLENO":1924595,"SAMPLE_ID":"2006670087","AGE_MA":1790,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.55,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6011","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Eighty-one analyses were made of zircon cores, which have a wide range of U contents (17-783 ppm) and Th/U (0.02-2.14). Six analyses are >10% discordant, with the remaining 75 analyses having 207Pb*/206Pb* dates ranging between c. 3579 Ma and 2830 Ma. The resulting spectrum of dates has no dominant grouping, but has maxima at c. 3550, 3265, 3230 and 3000 Ma. The two youngest analysed cores have dates of 2838 +/- 4 Ma and 2830 +/- 3 Ma (both 1sigma), which define a statistically coherent weighted mean date of 2833 +/- 5 Ma (MSWD = 3.1, probability = 0.08). Three analyses were made of the dark-CL zones mantling zircon cores, which have high U contents (627-783 ppm) and low Th/U (0.04-0.07). Two of these analyses (58.1 and 62.1) are discordant and excluded from further consideration, but the third (60.2) has a concordant 207Pb*/206Pb* date of c. 1820 Ma. Eight analyses of the moderate-CL intensity rims were attempted, with one site analysed twice (7.1 and 7.1A). One analysis (61.1) slightly overlapped a bright-CL rim and is discounted from further consideration. The moderate-intensity rims have U contents of 77-556 ppm, Th/U of 0.13-0.30 and 207Pb*/206Pb* dates of c. 1794 Ma to 1705 Ma. The two youngest dates (7.1A and 65.1) are slightly younger than the main group of five analyses, which comprise a statistically coherent group with a weighted mean date of 1790 +/- 7 Ma (MSWD = 0.55, probability of equivalence = 0.70). This date is interpreted as to reflect the timing of high-grade metamorphism, with the two younger dates interpreted to be affected by minor Pb loss. Only one late-stage, bright-CL rim was sufficiently thick to analyse. Two analyses were carried out in the same site (57.1 and 57.1A), with measured U contents of 128 and 84 ppm, and Th/U of 0.16 and 0.20. The two analyses yield 207Pb*/206Pb* dates of 1579 +/- 24 and 1580 +/- 24 Ma (both 1sigma), and have a weighted mean date of 1580 +/- 34 Ma (MSWD = 0.001, probability of equivalence = 0.97). The weighted mean date of 2833 +/- 5 Ma (95% confidence) obtained from the youngest two cores is taken as a maximum depositional age for the protolith of the quartzite, and the weighted mean date of 1790 +/- 7 Ma (95% confidence) obtained from the oldest five moderate-CL rims is interpreted as to reflect the timing of high-grade metamorphism. The two analyses of a single rim which yielded a weighted mean date of 1580 +/- 34 Ma (2sigma) is interpreted as the effect of contact metamorphism, as the date is indistinguishable from that of a nearby 1589.4 +/- 5.3 Ma granite (GA 2005670178). The geological significance of the c. 1820 Ma dark-CL zones is difficult to assess. One possibility is that this generation of zircon formation reflects metamorphism at c. 1820 Ma. Another possibility is that it is related to c. 1790 Ma metamorphism, and represents incomplete isotopic resetting or radiogenic Pb loss affecting the outer parts of zircon cores rimmed by moderate-CL overgrowths.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed quartzite - Tabletop","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A quartzite unit was sampled adjacent to the western margin of a large leucogranite intrusion in Tabletop Zone (MGA 513542E 7465160N). The quartzite unit strikes N, has a weak compositional layering defined by partings on bedding planes, and contains a moderately E-dipping layer-parallel foliation which is overprinted by a steeply N-dipping spaced cleavage. Further to the south, the unit contains steeply SSW-plunging mesoscopic folds, which are overprinted by a spaced cleavage dipping moderately S. Banded iron formation has been mapped immediately W of the quartzite (Bagas, 1999), but only secondary iron oxides in quartzite were observed in this study.bIn thin section the quartzite comprises >95% quartz, which forms a fine- to medium-grained recrystallized mosaic with sutured ('bulged') grain boundaries. Discontinuous folia of muscovite define the layer-parallel foliation. Rare isolated grains up to 1 mm in size consist of a recrystallized aggregate of very fine-grained muscovite and chlorite. Trace zircon, biotite and fine-grained opaque minerals are also present. A foliation defined by partial flattening of quartz grains overprints the layer-parallel foliation at a high angle and is interpreted as the east-west trending spaced cleavage seen in outcrop.","SAMPLING_FEATURE_NAME":"2006670087","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS407792","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Rudall Province","GEOLOGICAL_REGION_NAME":"Paterson Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-22.921589824,"LONG_GDA94":123.1320790034,"ELEV_M_AHD":356,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Maidment, D.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71169","AGE_REF":"Maidment, D.W., 2017. Geochronology of the Rudall Province, Western Australia: Implications for the amalgamation of the West and North Australian Cratons. Geological Survey of Western Australia. Report, 161, 95p.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/3/Combined/N15BJ","AGE_ENTRY_DATE":"2016-04-14","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3500","geometry":{"type":"Point","coordinates":[139.44207156,-30.1687088]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3500,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952106","IGSN":"10273/AU1952106","SAMPLENO":1952106,"SAMPLE_ID":"2007379004","AGE_MA":1553,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6051","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Pink, coarse-grained augen granitic gneiss with strong biotite foliation + hematite","SAMPLING_FEATURE_NAME":"2007379004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448968","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Mount Painter Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1687087983,"LONG_GDA94":139.4420715626,"ELEV_M_AHD":223,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-19","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3513","geometry":{"type":"Point","coordinates":[139.47031016,-30.14152161]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3513,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952107","IGSN":"10273/AU1952107","SAMPLENO":1952107,"SAMPLE_ID":"2007379005","AGE_MA":467,"AGE_MA_UNCERTAINTY":4.9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6052","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"White-black, equigranular medium grained granodiorite with biotite fabric, nearby K or Fe alteration veins","SAMPLING_FEATURE_NAME":"2007379005","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448969","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1415216117,"LONG_GDA94":139.4703101624,"ELEV_M_AHD":226,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-20","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.534","geometry":{"type":"Point","coordinates":[122.83580245,-22.91659144]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":534,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1694729","IGSN":"10273/AU1694729","SAMPLENO":1694729,"SAMPLE_ID":"2005670165","AGE_MA":1334.3,"AGE_MA_UNCERTAINTY":4.4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4889","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Eighty-two analyses were made of zircon cores. Two analyses (28.1 and 44.1) were >10% discordant and one analysis (76.1) had high counts of 204Pb. These analyses are considered unreliable and are excluded from further evaluation. The remaining 79 analyses have a range of 207Pb*/206Pb* dates between c. 3127 Ma and 2282 Ma, with maxima at c. 2875, 2685, 2660, 2510, 2480 and 2315 Ma. The two youngest core analyses with dates of c. 2287 and 2282 Ma define a statistically coherent pair with a weighted mean date of 2284 +/- 10 Ma (2sigma, MSWD = 0.24, probability of equivalence = 0.62). This is taken as a maximum depositional age for the sandstone protolith of the quartzite. Thirteen analyses of zircon rims were completed, three of which were duplicate analyses of the same site as a previous analysis. Post-analysis examination of rim analyses showed that three of these (53.1, 57.1 and 57.1A) slightly overlapped zircon cores and are not considered further. The remaining analyses have high U contents (673-2012 ppm) and low Th/U (0.03-0.12), with 207Pb*/206Pb* dates ranging between c. 1339 Ma and 1300 Ma. Eight of these 10 analyses define a statistically coherent group with a weighted mean date of 1334.3 +/- 4.4 Ma (MSWD = 1.3, probability of equivalence = 0.22). Two analyses (51.2 and 56.1) have slightly younger ages, but form statistical outliers and are interpreted to have undergone a small degree of Pb loss. The date of 1334.3 +/- 4.4 Ma is thus interpreted to reflect the timing of high-grade metamorphism of the quartzite.The weighted mean date of 2284 +/- 10 Ma (2sigma) defined by the youngest two core analyses is taken as a maximum depositional age for the sandstone protolith of the quartzite. The weighted mean date of 1334.3 +/- 4.4 Ma is interpreted to reflect the timing of high-grade metamorphism of the quartzite.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Quartzite was sampled from a prominent strike ridge in the Harbutt Range (MGA 483024E 7465554N). The quartzite forms part of a folded and possibly structurally repeated succession comprising quartzite, amphibolite, meta-chert, banded iron formation, granitic gneiss and ultramafic rock. A poorly defined layering is visible despite extensive recrystallization. In thin section, the quartzite consists almost entirely of quartz, with trace amounts of muscovite and zircon. The quartz consists of an interlocking mosaic of elongate, medium-grained domains with prominent undulose extinction that are separated from each other by narrow zones of fine-grained, recrystallized granoblastic quartz. These textures are consistent with recrystallization during an earlier pervasive high-grade metamorphic event, followed by later discrete recrystallization along grain boundaries during lower-grade deformation.","SAMPLING_FEATURE_NAME":"2005670165","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS361233","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Rudall Province","GEOLOGICAL_REGION_NAME":"Paterson Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-22.9165914357,"LONG_GDA94":122.8358024536,"ELEV_M_AHD":398,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Maidment, D.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71169","AGE_REF":"Maidment, D.W., 2017. Geochronology of the Rudall Province, Western Australia: Implications for the amalgamation of the West and North Australian Cratons. Geological Survey of Western Australia. Report, 161, 95p.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/3/Combined/N15BJ","AGE_ENTRY_DATE":"2016-04-11","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.550","geometry":{"type":"Point","coordinates":[151.39410712,-23.86462437]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":550,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1697532","IGSN":"10273/AU1697532","SAMPLENO":1697532,"SAMPLE_ID":"QFG6371","AGE_MA":270.2,"AGE_MA_UNCERTAINTY":2.9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.13,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6003","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":5093,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU5093","STRAT_UNIT_NAME":"Curtis Island Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Curtis Island Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"pegmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Pegmatite, cross cuts local S1 fabric/gneissosity, is deformed by flat lying tight F2 folds. U-Pb zircon geochronology","SAMPLING_FEATURE_NAME":"QFG6371","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS362777","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-23.8646243681,"LONG_GDA94":151.3941071216,"ELEV_M_AHD":4,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-03-17","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64556","AGE_REF":"Carson, C.J., von Gnielinski, F.E., Bultitude, R.J., 2007. Results of the joint GSQ-GA geochronology project, New England Orogen, ROSEDALE, MOUNT PERRY and GLADSTONE 1:100 000 Sheet Areas, March 2006-December 2006. Queensland Geological Record, 2006/01, 58p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr053388","AGE_ENTRY_DATE":"2013-08-09","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.553","geometry":{"type":"Point","coordinates":[123.132079,-22.92158982]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":553,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1924595","IGSN":"10273/AU1924595","SAMPLENO":1924595,"SAMPLE_ID":"2006670087","AGE_MA":1580,"AGE_MA_UNCERTAINTY":34,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.001,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6011","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Eighty-one analyses were made of zircon cores, which have a wide range of U contents (17-783 ppm) and Th/U (0.02-2.14). Six analyses are >10% discordant, with the remaining 75 analyses having 207Pb*/206Pb* dates ranging between c. 3579 Ma and 2830 Ma. The resulting spectrum of dates has no dominant grouping, but has maxima at c. 3550, 3265, 3230 and 3000 Ma. The two youngest analysed cores have dates of 2838 +/- 4 Ma and 2830 +/- 3 Ma (both 1sigma), which define a statistically coherent weighted mean date of 2833 +/- 5 Ma (MSWD = 3.1, probability = 0.08). Three analyses were made of the dark-CL zones mantling zircon cores, which have high U contents (627-783 ppm) and low Th/U (0.04-0.07). Two of these analyses (58.1 and 62.1) are discordant and excluded from further consideration, but the third (60.2) has a concordant 207Pb*/206Pb* date of c. 1820 Ma. Eight analyses of the moderate-CL intensity rims were attempted, with one site analysed twice (7.1 and 7.1A). One analysis (61.1) slightly overlapped a bright-CL rim and is discounted from further consideration. The moderate-intensity rims have U contents of 77-556 ppm, Th/U of 0.13-0.30 and 207Pb*/206Pb* dates of c. 1794 Ma to 1705 Ma. The two youngest dates (7.1A and 65.1) are slightly younger than the main group of five analyses, which comprise a statistically coherent group with a weighted mean date of 1790 +/- 7 Ma (MSWD = 0.55, probability of equivalence = 0.70). This date is interpreted as to reflect the timing of high-grade metamorphism, with the two younger dates interpreted to be affected by minor Pb loss. Only one late-stage, bright-CL rim was sufficiently thick to analyse. Two analyses were carried out in the same site (57.1 and 57.1A), with measured U contents of 128 and 84 ppm, and Th/U of 0.16 and 0.20. The two analyses yield 207Pb*/206Pb* dates of 1579 +/- 24 and 1580 +/- 24 Ma (both 1sigma), and have a weighted mean date of 1580 +/- 34 Ma (MSWD = 0.001, probability of equivalence = 0.97). The weighted mean date of 2833 +/- 5 Ma (95% confidence) obtained from the youngest two cores is taken as a maximum depositional age for the protolith of the quartzite, and the weighted mean date of 1790 +/- 7 Ma (95% confidence) obtained from the oldest five moderate-CL rims is interpreted as to reflect the timing of high-grade metamorphism. The two analyses of a single rim which yielded a weighted mean date of 1580 +/- 34 Ma (2sigma) is interpreted as the effect of contact metamorphism, as the date is indistinguishable from that of a nearby 1589.4 +/- 5.3 Ma granite (GA 2005670178). The geological significance of the c. 1820 Ma dark-CL zones is difficult to assess. One possibility is that this generation of zircon formation reflects metamorphism at c. 1820 Ma. Another possibility is that it is related to c. 1790 Ma metamorphism, and represents incomplete isotopic resetting or radiogenic Pb loss affecting the outer parts of zircon cores rimmed by moderate-CL overgrowths.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed quartzite - Tabletop","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A quartzite unit was sampled adjacent to the western margin of a large leucogranite intrusion in Tabletop Zone (MGA 513542E 7465160N). The quartzite unit strikes N, has a weak compositional layering defined by partings on bedding planes, and contains a moderately E-dipping layer-parallel foliation which is overprinted by a steeply N-dipping spaced cleavage. Further to the south, the unit contains steeply SSW-plunging mesoscopic folds, which are overprinted by a spaced cleavage dipping moderately S. Banded iron formation has been mapped immediately W of the quartzite (Bagas, 1999), but only secondary iron oxides in quartzite were observed in this study.bIn thin section the quartzite comprises >95% quartz, which forms a fine- to medium-grained recrystallized mosaic with sutured ('bulged') grain boundaries. Discontinuous folia of muscovite define the layer-parallel foliation. Rare isolated grains up to 1 mm in size consist of a recrystallized aggregate of very fine-grained muscovite and chlorite. Trace zircon, biotite and fine-grained opaque minerals are also present. A foliation defined by partial flattening of quartz grains overprints the layer-parallel foliation at a high angle and is interpreted as the east-west trending spaced cleavage seen in outcrop.","SAMPLING_FEATURE_NAME":"2006670087","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS407792","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Rudall Province","GEOLOGICAL_REGION_NAME":"Paterson Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-22.921589824,"LONG_GDA94":123.1320790034,"ELEV_M_AHD":356,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Maidment, D.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71169","AGE_REF":"Maidment, D.W., 2017. Geochronology of the Rudall Province, Western Australia: Implications for the amalgamation of the West and North Australian Cratons. Geological Survey of Western Australia. Report, 161, 95p.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/3/Combined/N15BJ","AGE_ENTRY_DATE":"2016-04-14","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4684","geometry":{"type":"Point","coordinates":[130.99295365,-21.90020056]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4684,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1936424","IGSN":"10273/AU1936424","SAMPLENO":1936424,"SAMPLE_ID":"2003082026","AGE_MA":1761,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.45,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4886","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Pod of massive cordierite-sillimanite rock within partially melting metasediments.  Interpreted as possible restite after melt extraction.  Igneous zircon age consistent with Yambah Event.  Inheritance conistent with Lander package metasediment protolith","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of massive, quartz-poor cordierite-rich rock was collected from an isolated hill of granulite-facies metasedimentary rocks, about 25 km east-northeast of Mount Singleton in southwestern MOUNT THEO. The hill comprises a metasedimentary succession mapped as high grade Lander Rock Formation. The most common rock types are metapelites (containing sillimanite-cordierite-K-feldspar +/- garnet and quartz) that locally have garnet-bearing leucosome patches interlayered with cordierite-biotite-garnet-quartz metapsammite. The metapelite and metapsammite are interlayered on a scale of 3 cm to 1 metre. These are intermingled with, and locally form xenoliths in, an S-type granite with coarse-grained K-feldspar phenocrysts up to 2 cm. The granite is garnet- and cordierite-bearing, with numerous metasedimentary xenoliths. The granite is interpreted to have formed in situ from melting of the metasedimentary rocks. Adjacent to the granite are zones of massive cordierite granulite containing variable amounts of sillimanite, biotite, spinel and garnet with apparent pseudo-xenoliths of metapsammite and locally of more typical K-feldspar-bearing metapelite. The sample selected for geochronology contains around 90% cordierite, with minor garnet, biotite and sillimanite; it appears to have little or no quartz or K-feldspar. It was interpreted in the field to be a restite from partial melting, which formed a crystal \"mush\" (including metapsammite xenoliths) with all melt removed. The rocks have a bedding-parallel fabric but no evidence for non-coaxial strain (Scrimgeour 2013). The sample was selected for dating to determine the age and provenance of the sedimentary precursor, and the timing of granulite-facies metamorphism.","SAMPLING_FEATURE_NAME":"MT03IRS015","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS439353","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-21.9002005615,"LONG_GDA94":130.9929536485,"ELEV_M_AHD":577,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72894","AGE_REF":"Kositcin, N., Scrimgeour, I.R., 2020. Summary of results. Joint NTGS-GA geochronology project: central and western Aileron Province. Northern Territory Geological Survey Record, 2020-011, 32p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/90549","AGE_ENTRY_DATE":"2020-08-20","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.531","geometry":{"type":"Point","coordinates":[122.83229322,-22.83604447]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":531,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1694724","IGSN":"10273/AU1694724","SAMPLENO":1694724,"SAMPLE_ID":"2005670162","AGE_MA":1315,"AGE_MA_UNCERTAINTY":21,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4815","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Thirty-three analyses were made of 32 grains, which included one analysis (15.1) of the thin zircon rims. Zircon cores have U contents of 35-601 ppm, Th/U values of 0.08-3.04, and 207Pb*/206Pb* dates that form a complex spectrum between 1891 and 1669 Ma, with a dominant peak at c. 1780 Ma, and subsidiary peaks at c. 1805, 1740 and 1690 Ma. One analysis (32.1) is highly discordant and is not considered further. Two analyses (23.1 and 25.1) with dates of c. 1891 and 1841 Ma are significantly older than main age components and are interpreted as xenocrysts. Three cores with dates between c. 1809 Ma and 1804 Ma define a weighted mean date of 1806 +/- 10 Ma (MSWD = 0.07, probability of equivalence = 0.93) which appears to be distinct from the dominant c. 1780 Ma peak, and is interpreted as inheritance. Seventeen analyses with dates between c. 1792 and 1767 Ma form a dominant age component, and define a statistically coherent group with a weighted mean 207Pb*/206Pb* date of 1780.9 +/- 4.1 Ma (MSWD = 0.67, probability of equivalence = 0.82). This is interpreted as the magmatic age of the granitic protolith of the orthogneiss. Of the remaining ten analyses, five (5.1, 7.1, 24.1, 14.1 and 21.1) form a distinctive group of high Th/U (2.00-3.04) and low U (29-70 ppm) grains with dates ranging between c. 1757 and 1723 Ma, and analysis 26.1 has a date that is within uncertainty of the high Th/U grouping (c. 1737 Ma), but with higher U (195 ppm) and lower Th/U (0.33). This analysis can be combined with those of the high Th/U grouping, yielding a statistically coherent grouping of 1738 +/- 13 Ma (MSWD = 0.31, probability of fit = 0.91). Three near-concordant analyses of oscillatory zoned zircon (12.1, 16.1 and 19.1) have significantly younger dates of c. 1693, 1681 and 1669 Ma, defining a weighted mean 207Pb/*206Pb* date of 1688 +/- 8 Ma (MSWD = 1.04, probability of equivalence = 0.35). These grains have mostly higher U contents (424, 601 and 55 ppm), and lower Th/U (0.13, 0.87 and 1.44 respectively). A second analysis of one of these grains (16.2) yielded a date of c. 1768 Ma, forming part of the main age component, and suggesting that these younger dates might have been a result of an ancient Pb loss event during metamorphism. In addition, one analysis of a moderate-intensity zircon rim (15.1) has a moderate U content of 298 ppm and Th/U of 0.30, with a concordant 207Pb*/206Pb* date of 1315 +/- 11 (1sigma).The pre-1800 Ma analyses are interpreted as inheritance, and the weighted mean date of 1780.9 +/- 4.1 Ma (95% confidence) obtained from 17 cores is interpreted as the magmatic crystallisation age of the granitic protolith, based on the generally uncomplicated oscillatory nature of the zoning in these grains, their relatively uniform compositions and the fact that this age component is the dominant one in the granitic orthogneiss. The six analyses with predominantly low U and high Th/U that cluster at 1738 +/- 13 Ma are interpreted to reflect zircon recrystallization during metamorphism, with associated trace element mobility and Pb loss. If the dates obtained from the grains were affected by recrystallization, it is possible that the c. 1738 Ma date reflects the timing of a discrete metamorphic event, but it is also possible that these dates represent a coincidental clustering of isotopically disturbed dates, with their relatively large uncertainties due to their low U contents making it difficult to identify isotopic variability. The second possibility is favoured, owing to the presence of a cluster of three concordant analyses at 1688 +/- 8 Ma (95% confidence), which is interpreted as the age of the event responsible for partial resetting of the low-U, high-Th/U zircons that yielded c. 1738 Ma dates. The single rim dated at c. 1315 Ma is tentatively interpreted as the timing of a high-grade metamorphic event (other rims with similar CL are present, but are not wide enough for analysis). A lack of dates between the relatively tight age ","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed megacrystic gneiss Harbutt Range","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Megacrystic granitic orthogneiss was sampled from the Connaughton Zone c. 10 km north of the Harbutt Range and c. 4 km southwest of the Camel-Tabletop Fault (MGA 482971E 7474620N). The sampled unit crops out discontinuously over a strike length of approximately 6 km and is broadly conformable with a succession of banded iron formation, amphibolite, muscovite-biotite schist and ultramafic rock. The orthogneiss consists of abundant K-feldspar megacrysts to 2 cm in a medium-grained matrix of quartz, K-feldspar and biotite with minor plagioclase, and has a layer-parallel foliation defined by biotite and quartz-feldspar aggregates. Minor garnet has been described from this unit (Bagas and Smithies, 1998b), but was not observed in the dated sample. Minor epidote forms discrete grains replacing biotite, and feldspar is commonly sericitized.","SAMPLING_FEATURE_NAME":"2005670162","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS361229","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Rudall Province","GEOLOGICAL_REGION_NAME":"Paterson Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-22.8360444743,"LONG_GDA94":122.8322932183,"ELEV_M_AHD":370,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Maidment, D.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71169","AGE_REF":"Maidment, D.W., 2017. Geochronology of the Rudall Province, Western Australia: Implications for the amalgamation of the West and North Australian Cratons. Geological Survey of Western Australia. Report, 161, 95p.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/3/Combined/N15BJ","AGE_ENTRY_DATE":"2016-04-08","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4484","geometry":{"type":"Point","coordinates":[131.84050795,-23.23901455]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4484,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1598580","IGSN":"10273/AU1598580","SAMPLENO":1598580,"SAMPLE_ID":"2000082009","AGE_MA":1635.6,"AGE_MA_UNCERTAINTY":5.5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.06,"NUMBER_OF_ANALYSES":18,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z3675","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":"North Australian Craton","STRATNO":41858,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU41858","STRAT_UNIT_NAME":"Yaya Metamorphic Complex","INFORMAL_UNIT_NAME":"Papunya Quartzite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Massive crystalline quartzite outcrops at a number of localities north of Mount Larrie in HAAST BLUFF, most notably as a prominent ridge 6 km west-southwest of Papunya, which extends for 5 km along strike. These outcrops have been assigned to the Inyalinga Granulite of the Yaya Metamorphic Complex (Scrimgeour et al in press). The quartzite appears to be metasedimentary in origin, is clean, coarsely crystalline and is interpreted to have undergone structural repetition. Recessive zones occur in the quartzite ridge, with rare outcrops of calc-silicate rock. At its western end, the quartzite is intruded by the Larrie Granodiorite (1640-1630 Ma Waluwiya Suite). Large rafts of quartzite within Larrie Granodiorite at 788086mE, 7425567mN are interpreted to belong to the Inyalinga Granulite.","SAMPLING_FEATURE_NAME":"2000082009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS120574","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Warumpi Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.2390145476,"LONG_GDA94":131.8405079484,"ELEV_M_AHD":655,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Massive crystalline quartzite outcrops at a number of localities north of Mount Larrie in HAAST BLUFF, most notably as a prominent ridge 6 km west-southwest of Papunya, which extends for 5 km along strike.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68832","AGE_REF":"Cross, A., Claoue-Long, J.C., Scrimgeour, I.R., Close, D.F., Edgoose, C.J., 2005. Summary of results. Joint NTGS-GA geochronology project southern Arunta Region. Northern Territory Geological Survey Record, 2004-003, CD, 61p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82424","AGE_ENTRY_DATE":"2020-06-11","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1473","geometry":{"type":"Point","coordinates":[135.17744546,-23.46511001]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1473,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1926344","IGSN":"10273/AU1926344","SAMPLENO":1926344,"SAMPLE_ID":"IC06CJC012","AGE_MA":1729,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.3,"NUMBER_OF_ANALYSES":27,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6023","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Strangways Event","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":26252,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26252","STRAT_UNIT_NAME":"Albarta Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Alberta Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"garnet-cordierite high-grade metasediment from eastern Albarta Metamorphics","SAMPLING_FEATURE_NAME":"IC06CJC012","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS428941","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.4651100055,"LONG_GDA94":135.1774454628,"ELEV_M_AHD":485,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-08-26","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65556","AGE_REF":"Carson, C.J., Claoue-Long, J.C., Stern, R.A., Close, D.F., Scrimgeour, I.R., Glass, L.M., 2009. Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006-May 2007. Northern Territory Geological Survey Record, 2009-001, 77p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449","AGE_ENTRY_DATE":"2014-04-29","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4681","geometry":{"type":"Point","coordinates":[130.92093151,-22.88295149]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4681,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1936426","IGSN":"10273/AU1936426","SAMPLENO":1936426,"SAMPLE_ID":"2003082028","AGE_MA":1628,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.04,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4887","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Mafic granulite.  Sill or dyke of metabasite within granulite facies metasediments S of Andrew Young Hills.  All zircons appear metamorphic by christmas tree zoning pattern and external form, so no magmatic zircon interpreted.  Earliest metamorphic age consistent with Yambah Event metamorphism.  Second overprint from Liebig event - possibly thermal effect of aureole around Andrew Young Hills Gabbro.","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"mafic granulite","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of homogeneous two-pyroxene mafic granulite was collected from an isolated hill located 5.5 km south of the Andrew Young Hills and 3.5 km southeast of Black Hill Bore on southwestern MOUNT DOREEN. The sample location is about 2 km northeast of sample MD03IRS33 and collected from a mafic body at least 50 m by 15 m in size. The mafic unit is interpreted to be a sill-like body, which intrudes a metasedimentary succession mapped as Lander Rock Formation that is identical to that sampled at MD03IRS33. The hill is surrounded by unconsolidated Quaternary sediments, and the nearest outcrop of undeformed layered mafic igneous rock is of the Andrew Young Igneous Complex, 4 km to the north. Gabbronorite of the Andrew Young Igneous Complex has a SHRIMP U-Pb age of 1633 +/- 3 Ma (Claoue-Long and Hoatson 2005). Granites coeval with the mafic rocks have SHRIMP U-Pb zircon ages of 1635 +/- 9 Ma (Young et al 1995a, b) and 1640 +/- 6 Ma (Cross et al 2005), which are interpreted to represent the timing of magmatic zircon crystallisation. Both the metasedimentary rocks and the mafic sills are metamorphosed to granulite-facies, whereas the Andrew Young Igneous Complex is unmetamorphosed. Therefore, metamorphism of this sample is interpreted to be ca 1635 Ma or older.","SAMPLING_FEATURE_NAME":"MD03IRS29","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS439355","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8829514868,"LONG_GDA94":130.9209315058,"ELEV_M_AHD":583,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72894","AGE_REF":"Kositcin, N., Scrimgeour, I.R., 2020. Summary of results. Joint NTGS-GA geochronology project: central and western Aileron Province. Northern Territory Geological Survey Record, 2020-011, 32p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/90549","AGE_ENTRY_DATE":"2020-08-20","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13524","geometry":{"type":"Point","coordinates":[138.84544419,-34.68139748]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13524,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1680546","IGSN":"10273/AU1680546","SAMPLENO":1680546,"SAMPLE_ID":"R695752","AGE_MA":1589,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4697","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R695752 is a strongly foliated granitic gneiss forming a massive body 3-4 km thick, with a well-defined planar gneissosity. The rock is dominated by quartz and plagioclase in equal portions. Segregations of biotite define the gneissosity which wraps rounded K-feldspar augens up to 3 cm. Plagioclase and biotite are retrogressed to sericite. This W margin of the granite gneiss intrudes the surrounding metasedimentary rocks, and it has a sheared margin fabric (in contact with basement metasediments) which parallels the gneiss along its E edge. In thin section, it displays a coarse-grained granitoid texture, strongly modified by phyllonitic deformation and alteration. Texturally the rock comprises elongated lithons of relict coarse-grained granitoid, and subparallel to anastomosing bands dominated by foliated sericite and lesser biotite. Quartz forms anhedral grains with moderate shadowy strain extinction in the granitoid lithons, and represents relict primary igneous quartz. K-feldspar is restricted to the granitoid lithons, with blocky phenocrysts ranging up to ~4 mm long. Most K-feldspar displays \"tartan\" microcline twinning, but large K-feldspar phenocrysts lack such twinning and appears to represent relict primary orthoclase. Minor albite occurs in some granitoid lithons, and forms optically continuous replacements of primary anhedral plagioclase grains. Minor biotite forms (1) rare small euhedral platy inclusions (with dark chocolate brown to straw yellow pleochroism) in some large quartz grains (interpreted as primary igneous biotite), and (2) rare aggregates of small flakes in the granitoid lithons, interpreted as metamorphic biotite replacing primary ferromagnesian minerals, and (3) most commonly small flakes, pleochroic from tan brown to pale yellow, in aggregates elongated within subparallel strongly foliated sericite-rich bands that traverse the rock. Accessory minerals include opaque oxide minerals, titanite, zircon, allanite and tourmaline.","SAMPLING_FEATURE_NAME":"R695752","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS352293","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.6813974831,"LONG_GDA94":138.8454441903,"ELEV_M_AHD":225,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"This sample is located in the northern Houghton Inlier approximately 4 km E of Williamstown in the South Para River gorge, 100 m downstream from where the river crosses Bassnet Road, very close to the Terranechron sample site of Belousova et al. (2006).","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Marjoribanks, R.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-27","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4683","geometry":{"type":"Point","coordinates":[130.92093151,-22.88295149]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4683,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1936426","IGSN":"10273/AU1936426","SAMPLENO":1936426,"SAMPLE_ID":"2003082028","AGE_MA":1768,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.22,"NUMBER_OF_ANALYSES":27,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4887","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Mafic granulite.  Sill or dyke of metabasite within granulite facies metasediments S of Andrew Young Hills.  All zircons appear metamorphic by christmas tree zoning pattern and external form, so no magmatic zircon interpreted.  Earliest metamorphic age consistent with Yambah Event metamorphism.  Second overprint from Liebig event - possibly thermal effect of aureole around Andrew Young Hills Gabbro.","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"mafic granulite","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of homogeneous two-pyroxene mafic granulite was collected from an isolated hill located 5.5 km south of the Andrew Young Hills and 3.5 km southeast of Black Hill Bore on southwestern MOUNT DOREEN. The sample location is about 2 km northeast of sample MD03IRS33 and collected from a mafic body at least 50 m by 15 m in size. The mafic unit is interpreted to be a sill-like body, which intrudes a metasedimentary succession mapped as Lander Rock Formation that is identical to that sampled at MD03IRS33. The hill is surrounded by unconsolidated Quaternary sediments, and the nearest outcrop of undeformed layered mafic igneous rock is of the Andrew Young Igneous Complex, 4 km to the north. Gabbronorite of the Andrew Young Igneous Complex has a SHRIMP U-Pb age of 1633 +/- 3 Ma (Claoue-Long and Hoatson 2005). Granites coeval with the mafic rocks have SHRIMP U-Pb zircon ages of 1635 +/- 9 Ma (Young et al 1995a, b) and 1640 +/- 6 Ma (Cross et al 2005), which are interpreted to represent the timing of magmatic zircon crystallisation. Both the metasedimentary rocks and the mafic sills are metamorphosed to granulite-facies, whereas the Andrew Young Igneous Complex is unmetamorphosed. Therefore, metamorphism of this sample is interpreted to be ca 1635 Ma or older.","SAMPLING_FEATURE_NAME":"MD03IRS29","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS439355","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8829514868,"LONG_GDA94":130.9209315058,"ELEV_M_AHD":583,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72894","AGE_REF":"Kositcin, N., Scrimgeour, I.R., 2020. Summary of results. Joint NTGS-GA geochronology project: central and western Aileron Province. Northern Territory Geological Survey Record, 2020-011, 32p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/90549","AGE_ENTRY_DATE":"2020-08-20","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3504","geometry":{"type":"Point","coordinates":[139.44226544,-30.1695863]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3504,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1952103","IGSN":"10273/AU1952103","SAMPLENO":1952103,"SAMPLE_ID":"2007379001","AGE_MA":1564,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6051","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"White-black biotite-rich melosome","SAMPLING_FEATURE_NAME":"2007379001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS448965","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":"Mount Painter Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.1695863042,"LONG_GDA94":139.442265441,"ELEV_M_AHD":225,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-10-19","SAMPLE_ORIGINATOR":"Neumann, N.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.539","geometry":{"type":"Point","coordinates":[151.75622894,-24.96450813]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":539,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1697500","IGSN":"10273/AU1697500","SAMPLENO":1697500,"SAMPLE_ID":"BB4211","AGE_MA":287,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6008","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":23625,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23625","STRAT_UNIT_NAME":"Good Night beds","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Good Night Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"sedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"rare garnet, biotite quartzo-feldspathic gneiss, highly strained. Sampled for detrital U-Pb zircon geochron, meta","SAMPLING_FEATURE_NAME":"BB4211","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS362755","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-24.9645081298,"LONG_GDA94":151.7562289373,"ELEV_M_AHD":191,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64556","AGE_REF":"Carson, C.J., von Gnielinski, F.E., Bultitude, R.J., 2007. Results of the joint GSQ-GA geochronology project, New England Orogen, ROSEDALE, MOUNT PERRY and GLADSTONE 1:100 000 Sheet Areas, March 2006-December 2006. Queensland Geological Record, 2006/01, 58p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr053388","AGE_ENTRY_DATE":"2013-08-20","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3800","geometry":{"type":"Point","coordinates":[133.72796428,-26.42056735]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3800,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1926730","IGSN":"10273/AU1926730","SAMPLENO":1926730,"SAMPLE_ID":"R1039140","AGE_MA":1182,"AGE_MA_UNCERTAINTY":28,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6024; GA6109","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample represents one of the most southerly outcrops of Birksgate Complex gneiss on the Tieyon 100k mapsheet. In the field the unit appears layered and transitional into anatectic granite, and has therefore been mapped as recrystallised gneiss. The protolith to this sample was unclear from field mapping but it may have been a leucogranite. The rock is a uniformly fine-grained, massive pale cream granitoid composed of small white to cream feldspar grains, translucent grey quartz grains, and minor small black mica flakes sprinkled sparsely through the rock. Diffuse reddish-brown ferruginous oxidation stains are scattered irregularly through the rock. This sample crystallised to form a micro-granitoid igneous rock, composed of the syenogranitic assemblage of K-feldspar + quartz + plagioclase + minor biotite + others (Fe-Ti oxide, zircon). The rock has a moderately fine-grained texture. The fractionated composition (paucity of ferromagnesians) allows the magma to have formed as a near-minimum-melt or a residual silicate liquid from a fractionated granitoid: the latter is preferred, given the euhedral form of the zircons. A small amount of meteoric waters infiltrated the rock, generating minor Fe-oxide staining along grain contacts and in diffuse clouds observed in the hand sample.","SAMPLING_FEATURE_NAME":"R1039140","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS429097","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.420567353,"LONG_GDA94":133.7279642829,"ELEV_M_AHD":368,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-10-02","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4682","geometry":{"type":"Point","coordinates":[130.9081165,-22.89135027]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4682,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1936427","IGSN":"10273/AU1936427","SAMPLENO":1936427,"SAMPLE_ID":"2003082029","AGE_MA":1769,"AGE_MA_UNCERTAINTY":14,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.07,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4887","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP RG","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Granulite facies metasediment S of Andrew Young Hills Gabbro.  Detrital zircon age spectrum consistent with Lander package.  No clearly defined metamorphic age although some grains clearly affected by metamorphism.","AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of migmatitic metapsammite was collected from an isolated hill 7 km south of the Andrew Young Hills and 3.5 km south of Black Hill Bore on southwestern MOUNT DOREEN. Overall, the hill comprises metapsammite interlayered with garnet-cordierite-sillimanite-biotite metapelitic rocks, and is surrounded by unconsolidated Quaternary sediments. Metapelite shows evidence for extensive partial melting (garnet-bearing leucosomes), leaving a cordierite-rich melanosome. Psammite is the dominant lithology and forms layers up to 2-3 m thick. The psammitic rocks are interpreted to have undergone biotite dehydration melting, forming cordierite-bearing leucosomes, and locally cordierite-garnet-bearing granite, possibly representing areas of pooled in situ melt. The hill also includes minor mafic granulite interpreted to be metamorphosed sill-like intrusive bodies (see MD03IRS29). The nearest outcrop of undeformed layered mafic igneous rock is of the ca 1635 Ma Andrew Young Igneous Complex, 4.5 km to the north. Lithologically, the dated sample is a granulite-facies, biotite-bearing metapsammite (quartz-rich metasedimentary rock) with K-feldspar-rich leucosome (locally garnet-bearing) enclosing aggregates of cordierite and quartz. Nearby, areas of coalesced leucosome form a diatexite containing rafts of metapsammite. The metapsammitic rock is variably foliated but not strongly deformed. The sample was selected for geochronology to determine a maximum age for deposition of the sedimentary protolith and the age of overprinting metamorphism.","SAMPLING_FEATURE_NAME":"MD03IRS33","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS439356","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8913502698,"LONG_GDA94":130.9081165005,"ELEV_M_AHD":583,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Claoue-Long, J.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72894","AGE_REF":"Kositcin, N., Scrimgeour, I.R., 2020. Summary of results. Joint NTGS-GA geochronology project: central and western Aileron Province. Northern Territory Geological Survey Record, 2020-011, 32p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/90549","AGE_ENTRY_DATE":"2020-08-20","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13525","geometry":{"type":"Point","coordinates":[138.84544419,-34.68139748]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13525,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1680546","IGSN":"10273/AU1680546","SAMPLENO":1680546,"SAMPLE_ID":"R695752","AGE_MA":1632,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4697","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R695752 is a strongly foliated granitic gneiss forming a massive body 3-4 km thick, with a well-defined planar gneissosity. The rock is dominated by quartz and plagioclase in equal portions. Segregations of biotite define the gneissosity which wraps rounded K-feldspar augens up to 3 cm. Plagioclase and biotite are retrogressed to sericite. This W margin of the granite gneiss intrudes the surrounding metasedimentary rocks, and it has a sheared margin fabric (in contact with basement metasediments) which parallels the gneiss along its E edge. In thin section, it displays a coarse-grained granitoid texture, strongly modified by phyllonitic deformation and alteration. Texturally the rock comprises elongated lithons of relict coarse-grained granitoid, and subparallel to anastomosing bands dominated by foliated sericite and lesser biotite. Quartz forms anhedral grains with moderate shadowy strain extinction in the granitoid lithons, and represents relict primary igneous quartz. K-feldspar is restricted to the granitoid lithons, with blocky phenocrysts ranging up to ~4 mm long. Most K-feldspar displays \"tartan\" microcline twinning, but large K-feldspar phenocrysts lack such twinning and appears to represent relict primary orthoclase. Minor albite occurs in some granitoid lithons, and forms optically continuous replacements of primary anhedral plagioclase grains. Minor biotite forms (1) rare small euhedral platy inclusions (with dark chocolate brown to straw yellow pleochroism) in some large quartz grains (interpreted as primary igneous biotite), and (2) rare aggregates of small flakes in the granitoid lithons, interpreted as metamorphic biotite replacing primary ferromagnesian minerals, and (3) most commonly small flakes, pleochroic from tan brown to pale yellow, in aggregates elongated within subparallel strongly foliated sericite-rich bands that traverse the rock. Accessory minerals include opaque oxide minerals, titanite, zircon, allanite and tourmaline.","SAMPLING_FEATURE_NAME":"R695752","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS352293","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.6813974831,"LONG_GDA94":138.8454441903,"ELEV_M_AHD":225,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"This sample is located in the northern Houghton Inlier approximately 4 km E of Williamstown in the South Para River gorge, 100 m downstream from where the river crosses Bassnet Road, very close to the Terranechron sample site of Belousova et al. (2006).","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Marjoribanks, R.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-27","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13526","geometry":{"type":"Point","coordinates":[138.84544419,-34.68139748]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13526,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1680546","IGSN":"10273/AU1680546","SAMPLENO":1680546,"SAMPLE_ID":"R695752","AGE_MA":1609,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4697","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":1138,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1138","STRAT_UNIT_NAME":"Barossa Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R695752 is a strongly foliated granitic gneiss forming a massive body 3-4 km thick, with a well-defined planar gneissosity. The rock is dominated by quartz and plagioclase in equal portions. Segregations of biotite define the gneissosity which wraps rounded K-feldspar augens up to 3 cm. Plagioclase and biotite are retrogressed to sericite. This W margin of the granite gneiss intrudes the surrounding metasedimentary rocks, and it has a sheared margin fabric (in contact with basement metasediments) which parallels the gneiss along its E edge. In thin section, it displays a coarse-grained granitoid texture, strongly modified by phyllonitic deformation and alteration. Texturally the rock comprises elongated lithons of relict coarse-grained granitoid, and subparallel to anastomosing bands dominated by foliated sericite and lesser biotite. Quartz forms anhedral grains with moderate shadowy strain extinction in the granitoid lithons, and represents relict primary igneous quartz. K-feldspar is restricted to the granitoid lithons, with blocky phenocrysts ranging up to ~4 mm long. Most K-feldspar displays \"tartan\" microcline twinning, but large K-feldspar phenocrysts lack such twinning and appears to represent relict primary orthoclase. Minor albite occurs in some granitoid lithons, and forms optically continuous replacements of primary anhedral plagioclase grains. Minor biotite forms (1) rare small euhedral platy inclusions (with dark chocolate brown to straw yellow pleochroism) in some large quartz grains (interpreted as primary igneous biotite), and (2) rare aggregates of small flakes in the granitoid lithons, interpreted as metamorphic biotite replacing primary ferromagnesian minerals, and (3) most commonly small flakes, pleochroic from tan brown to pale yellow, in aggregates elongated within subparallel strongly foliated sericite-rich bands that traverse the rock. Accessory minerals include opaque oxide minerals, titanite, zircon, allanite and tourmaline.","SAMPLING_FEATURE_NAME":"R695752","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS352293","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Adelaide Fold Belt","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.6813974831,"LONG_GDA94":138.8454441903,"ELEV_M_AHD":225,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"This sample is located in the northern Houghton Inlier approximately 4 km E of Williamstown in the South Para River gorge, 100 m downstream from where the river crosses Bassnet Road, very close to the Terranechron sample site of Belousova et al. (2006).","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Marjoribanks, R.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73105","AGE_REF":"Jagodzinski, E.A., Szpunar, M., Meaney, K., Fraser, G., 2020. SHRIMP U-Pb dating of the Barossa Complex, South Australia: exploring tectonic links between the Gawler Craton and Curnamona Province. Geological Survey of South Australia. Report Book, 2020/00017, 111p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2020d032924","AGE_ENTRY_DATE":"2022-11-27","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.528","geometry":{"type":"Point","coordinates":[122.09547496,-22.61061241]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":528,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1694722","IGSN":"10273/AU1694722","SAMPLENO":1694722,"SAMPLE_ID":"2005670080","AGE_MA":1679,"AGE_MA_UNCERTAINTY":25,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.21,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4815","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Thirty-two analyses were made of zircon cores. Two of these (7.1 and 18.1) are >10% discordant and are not considered further. Twenty-three analyses were made of the main population of dark-CL cores, which yield 207Pb*/206Pb* dates between c. 1818 Ma and 1757 Ma. Nineteen of these analyses define a statistically coherent grouping with moderate to high U contents (376-1020 ppm), Th/U of 0.14-0.59, and a weighted mean date of 1804.1 +/- 2.8 Ma (MSWD = 1.5, probability of equivalence = 0.10). Four analyses with near-concordant dates ranging between c. 1785 Ma and 1757 Ma have on average higher U contents than the main grouping (686-1148 ppm), and are interpreted to have lost a small amount of radiogenic Pb during later metamorphism. Seven analyses were made of the moderate-CL intensity cores within dark-CL zircon, which have moderate U contents (216-799 ppm), Th/U of 0.08-0.66 and 207Pb*/206Pb* dates ranging between c. 2453 Ma and 1845 Ma. These are interpreted to be xenocrysts incorporated within the granitic protolith. Six analyses were made of bright-CL rims, with two (4.2 and 6.3) repeat analyses of prior analysis sites. The rims have low U contents (33-157 ppm) and low Th/U (0.01-0.52). Two analyses (5.1 and 8.1) are >10% discordant and have a high proportion of common Pb, yielding unreliable and imprecise dates that are not considered further. The remaining four analyses define a statistically coherent group with 207Pb*/206Pb* dates ranging between c. 1687 Ma and 1662 Ma, and yield a weighted mean date of 1679 +/- 25 Ma (MSWD = 0.21, probability of equivalence = 0.89). The date of 1804.1 +/- 2.8 Ma obtained from the largest cluster of cores is interpreted to be the age of crystallization of the granitic protolith. The date of 1679 +/- 25 Ma obtained from four of the six bright-CL rims is interpreted to reflect the timing of a high-grade metamorphic event.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed layered orthogneiss - Rudall","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Compositionally layered granitic orthogneiss was sampled from the southwestern part of the Talbot Zone (MGA 407035E 7499300), where it comprises poorly exposed quartz-feldspar-biotite gneiss with sporadic xenoliths of amphibolite, ultramafic rock and metasedimentary rock (Hickman and Bagas, 1998). The gneiss unit contains centimetre-scale layering defined by variable proportions of feldspar and biotite and thin lenses of biotite aggregates up to 3 cm across. The sampled rock consists of an equigranular, relatively homogeneous, medium-grained granitic gneiss containing no obvious xenoliths. In thin section, the sample consists of granoblastic quartz and K-feldspar aggregates which define a high-grade foliation, with subsidiary plagioclase and minor hornblende. Minor retrograde alteration is evident, with some sericitic alteration of K-feldspar and epidote associated with mafic minerals.","SAMPLING_FEATURE_NAME":"2005670080","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS361227","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Rudall Province","GEOLOGICAL_REGION_NAME":"Paterson Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-22.6106124093,"LONG_GDA94":122.0954749578,"ELEV_M_AHD":423,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Maidment, D.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71169","AGE_REF":"Maidment, D.W., 2017. Geochronology of the Rudall Province, Western Australia: Implications for the amalgamation of the West and North Australian Cratons. Geological Survey of Western Australia. Report, 161, 95p.","AGE_PUBLICATION_LINKS":"https://geodocs.dmirs.wa.gov.au/Web/documentlist/3/Combined/N15BJ","AGE_ENTRY_DATE":"2016-04-07","AGE_LAST_UPDATED":"2020-11-03"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.541","geometry":{"type":"Point","coordinates":[151.58073789,-24.52299908]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":541,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1697502","IGSN":"10273/AU1697502","SAMPLENO":1697502,"SAMPLE_ID":"QFG6353","AGE_MA":282.4,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6003","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":70399,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU70399","STRAT_UNIT_NAME":"Cassillis Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cassillis Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Cassillis Metamorphics (informal)","SAMPLING_FEATURE_NAME":"QFG6353","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS362757","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-24.5229990774,"LONG_GDA94":151.5807378876,"ELEV_M_AHD":128,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64556","AGE_REF":"Carson, C.J., von Gnielinski, F.E., Bultitude, R.J., 2007. Results of the joint GSQ-GA geochronology project, New England Orogen, ROSEDALE, MOUNT PERRY and GLADSTONE 1:100 000 Sheet Areas, March 2006-December 2006. Queensland Geological Record, 2006/01, 58p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr053388","AGE_ENTRY_DATE":"2013-08-08","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.543","geometry":{"type":"Point","coordinates":[151.56364436,-24.7878935]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":543,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1697505","IGSN":"10273/AU1697505","SAMPLENO":1697505,"SAMPLE_ID":"QFG6340B","AGE_MA":274.9,"AGE_MA_UNCERTAINTY":3.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6003","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"mid-upper amphibolite faces metamorphic event at ca.275 Ma, collection of magmatic zircons at ca. 325 Ma, derived from arc magmatism?, collection of continental derived detritus with early Palaeozoic to Palaeoproterozoic aged grains.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":74686,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74686","STRAT_UNIT_NAME":"Glen Eva Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Glen Eva Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"sedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"informal Glen Eva Complex. Diatextite, migmatitic biotite gniessic granite. Mobilisate or granitic component sampled for U-Pb zircon to determine timing of partial melting, meta","SAMPLING_FEATURE_NAME":"QFG6340B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS362750","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-24.7878935043,"LONG_GDA94":151.5636443616,"ELEV_M_AHD":176,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64556","AGE_REF":"Carson, C.J., von Gnielinski, F.E., Bultitude, R.J., 2007. Results of the joint GSQ-GA geochronology project, New England Orogen, ROSEDALE, MOUNT PERRY and GLADSTONE 1:100 000 Sheet Areas, March 2006-December 2006. Queensland Geological Record, 2006/01, 58p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr053388","AGE_ENTRY_DATE":"2013-08-07","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.545","geometry":{"type":"Point","coordinates":[151.51806702,-24.71569613]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":545,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1697515","IGSN":"10273/AU1697515","SAMPLENO":1697515,"SAMPLE_ID":"QFG6360","AGE_MA":276.8,"AGE_MA_UNCERTAINTY":4.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6003","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Mid-upper amphibolite faces metamorphic event at ca. 275 Ma, detritus dominated by magmatic zircons at ca. 325 Ma, derived from arc magmatism?, and several grains of continental derived detritus with early Palaeozoic to Palaeoproterozoic aged grains.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":74686,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74686","STRAT_UNIT_NAME":"Glen Eva Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Glen Eva Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"migmatitic Glen Eva Complex, mobilisate sampled for U-Pb zircon emplacement or metamorphic age","SAMPLING_FEATURE_NAME":"QFG6360","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS362764","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-24.7156961297,"LONG_GDA94":151.5180670204,"ELEV_M_AHD":-48,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64556","AGE_REF":"Carson, C.J., von Gnielinski, F.E., Bultitude, R.J., 2007. Results of the joint GSQ-GA geochronology project, New England Orogen, ROSEDALE, MOUNT PERRY and GLADSTONE 1:100 000 Sheet Areas, March 2006-December 2006. Queensland Geological Record, 2006/01, 58p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr053388","AGE_ENTRY_DATE":"2013-08-07","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3882","geometry":{"type":"Point","coordinates":[135.11992259,-31.08811918]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3882,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055443","IGSN":"10273/AU2055443","SAMPLENO":2055443,"SAMPLE_ID":"R1564843","AGE_MA":2426,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.67,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":7429,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU7429","STRAT_UNIT_NAME":"Glenloth Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Glenloth Granite is a gneissic granite located in the central Mulgathing Complex. Sample R1564843 is from the type locality at Glenloth Goldfield, where the Glenloth Granite is a migmatised orthogneiss with a discontinuous gneissic foliation defined by biotite alignment in the melanocratic zones and by the alignment of minor biotite in the leucocratic zones. Biotite- and hornblende-rich schollen are present.","SAMPLING_FEATURE_NAME":"R1564843","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527763","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.0881191825,"LONG_GDA94":135.1199225888,"ELEV_M_AHD":167,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3883","geometry":{"type":"Point","coordinates":[135.11992259,-31.08811918]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3883,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055443","IGSN":"10273/AU2055443","SAMPLENO":2055443,"SAMPLE_ID":"R1564843","AGE_MA":2452,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.76,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":7429,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU7429","STRAT_UNIT_NAME":"Glenloth Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Glenloth Granite is a gneissic granite located in the central Mulgathing Complex. Sample R1564843 is from the type locality at Glenloth Goldfield, where the Glenloth Granite is a migmatised orthogneiss with a discontinuous gneissic foliation defined by biotite alignment in the melanocratic zones and by the alignment of minor biotite in the leucocratic zones. Biotite- and hornblende-rich schollen are present.","SAMPLING_FEATURE_NAME":"R1564843","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527763","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.0881191825,"LONG_GDA94":135.1199225888,"ELEV_M_AHD":167,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3867","geometry":{"type":"Point","coordinates":[134.41462512,-29.10188312]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3867,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2004099","IGSN":"10273/AU2004099","SAMPLENO":2004099,"SAMPLE_ID":"R1707895","AGE_MA":1685,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6124","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"GOMA DH1 penetrated ~5 m of a dark quartz-feldspar-biotite-magnetite +/- garnet orthogneiss. This unit has a strong gneissic fabric which is sub-parallel to the long core axis. Contained within this unit are two thin, relatively undeformed, granitic units which may be dykes (represented by sample R1707896). The 20 cm interval of drill core collected for dating (R1707895) forms a thick, pale-pink, K-feldspar-rich gneissic layer within the generally darker grey, more plagioclase-rich gneissic layers. Sample R1707895 is a homogeneous gneissic band, with pink grains and grey-green areas: not obviously foliated. Altered K-feldspar-quartz-biotite-plagioclase granofels with chlorite-clay-carbonate-sericite alteration, minor anatase, apatite and zircon and chlorite, trace secondary pyrite, chalcopyrite or carbonate-filled fractures. Abundant pinkish K-feldspar to 6 mm in grainsize, possibly orthoclase transitional to microcline, locally enclosing albite-carbonate-sericite-altered plagioclase, with minor separate plagioclase with similar alteration. However, some grains with dominant chlorite alteration may also have been plagioclase. Other chloritised grains may have been amphibole, however. Quartz is common, partly in elongate polycrystalline lenses to 10 mm long but also in aggregates with partly altered biotite, chlorite of uncertain origin and brown clay, also of uncertain origin. Sparse lenses of anatase may have replaced sphene (titanite) and there are small grains of zircon, to 0.15 mm long, and apatite. Hairline fractures contain pale chlorite or carbonate.","SAMPLING_FEATURE_NAME":"GOMA DH1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH534725","BOREHOLE_TOP_DEPTH_M":307.65,"BOREHOLE_BASE_DEPTH_M":307.85,"GEOLOGICAL_PROVINCE":"Coober Pedy Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.1018831206,"LONG_GDA94":134.414625116,"ELEV_M_AHD":180,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69203; 69554","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Dutch, R., 2013. Zircon and monazite geochronology via SHRIMP and LA-ICPMS for the northern Gawler Craton, from 2009 GOMA drilling. Geological Survey of South Australia. Report Book, 2013/00013, 73p.; Reid, A.J., Jagodzinski, E.A., Armit, R.J., Dutch, R.A., Kirkland, C.L., Betts, P.G., Schaefer, B.F., 2014. U-Pb and Hf isotopic evidence for Neoarchean and Paleoproterozoic basement in the buried northern Gawler Craton, South Australia. Precambrian Research, 250, 127-142.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010634; https://doi.org/10.1016/j.precamres.2014.05.019","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7340","geometry":{"type":"Point","coordinates":[125.12543,-32.16574]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7340,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124007","IGSN":"10273/AU2124007","SAMPLENO":2124007,"SAMPLE_ID":"182203","AGE_MA":1170,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":37,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"metagabbro, Hannah prospect, Nornalup Zone,","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"metagabbro","SAMPLING_FEATURE_NAME":"182203","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS546209","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Eucla Basin","GEOLOGICAL_REGION_NAME":"Eucla Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-32.16574,"LONG_GDA94":125.12543,"ELEV_M_AHD":129,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-04-28","SAMPLE_ORIGINATOR":"Geological Survey of Western Australia (GSWA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD, Hall, CE and Spaggiari, CV 2012, 182203, metagabbro, Hannah prospect; Geochronology Record 1049: Geological Survey of Western Australia, 5p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/182203.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3995","geometry":{"type":"Point","coordinates":[144.50731671,-18.87620604]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3995,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2122059","IGSN":"10273/AU2122059","SAMPLENO":2122059,"SAMPLE_ID":"IWGT003","AGE_MA":1589,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.3,"NUMBER_OF_ANALYSES":36,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6173","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":39609,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU39609","STRAT_UNIT_NAME":"Oasis Metamorphics","INFORMAL_UNIT_NAME":"Oasis Metamorphics-PLEo/1","UNIT_NAME_SOURCE":"Oasis Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"calc-silicate gneiss","SAMPLING_FEATURE_NAME":"IWGT003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS534600","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Greenvale Province","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.8762060447,"LONG_GDA94":144.507316707,"ELEV_M_AHD":557,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Withnall, I.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3885","geometry":{"type":"Point","coordinates":[133.97129583,-29.68674932]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3885,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055444","IGSN":"10273/AU2055444","SAMPLENO":2055444,"SAMPLE_ID":"R1699833","AGE_MA":2466,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.04,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of hydrothermal event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Distinctive, unnamed, tabular K-feldspar granite of the Mulgathing Complex. This granite has a prominent foliation and the alignment and tiling of the tabular feldspars may indicate the granite was emplaced during dextral shearing. Benbow (1993) noted garnet as an accessory mineral in some zones in this granite, however, no garnets were present in the sample analysed.","SAMPLING_FEATURE_NAME":"R1699833","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527764","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6867493203,"LONG_GDA94":133.9712958259,"ELEV_M_AHD":152,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.828","geometry":{"type":"Point","coordinates":[138.71785989,-23.53192509]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":828,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2002582","IGSN":"10273/AU2002582","SAMPLENO":2002582,"SAMPLE_ID":"Mt Whelan 1","AGE_MA":329,"AGE_MA_UNCERTAINTY":140,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.85,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6120","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Model 1 regression of these 6 discordant analyses yields an acceptable fit with respect to the data-point errors alone. The upper intercept is identical to the magmatic crystallisation age, completely independent of the 23 concordant analyses which provide the preferred definition of that age. This suggests that the 6 grains defining this discordia were originally part of the magmatic population, but have been affected to varying degrees by a single Pb loss event of probable Paleozoic age, possibly the Alice Springs Orogeny.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed biotite granite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"sampled by GSQ for SHRIMP U-Pb geochronology","SAMPLING_FEATURE_NAME":"BMR Mount Whelan 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH7271","BOREHOLE_TOP_DEPTH_M":606,"BOREHOLE_BASE_DEPTH_M":611,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-23.5319250946,"LONG_GDA94":138.7178598893,"ELEV_M_AHD":109,"ACCURACY_M":1000,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-11-12","SAMPLE_ORIGINATOR":"Carson, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68146","AGE_REF":"Carson, C.J., Hutton, L.J., Withnall, I.W., Perkins, W.G., Donchak, P.J.T., Parsons, A., Blake, P.R., Sweet, I.P., Neumann, N.L., Lambeck, A., 2011. Joint GSQ-GA NGA geochronology project Mount Isa region, 2009-2010. Queensland Geological Record, 2011/03, 211p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr074997","AGE_ENTRY_DATE":"2013-01-20","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3887","geometry":{"type":"Point","coordinates":[133.97129583,-29.68674932]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3887,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055444","IGSN":"10273/AU2055444","SAMPLENO":2055444,"SAMPLE_ID":"R1699833","AGE_MA":2433,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.18,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Distinctive, unnamed, tabular K-feldspar granite of the Mulgathing Complex. This granite has a prominent foliation and the alignment and tiling of the tabular feldspars may indicate the granite was emplaced during dextral shearing. Benbow (1993) noted garnet as an accessory mineral in some zones in this granite, however, no garnets were present in the sample analysed.","SAMPLING_FEATURE_NAME":"R1699833","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527764","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6867493203,"LONG_GDA94":133.9712958259,"ELEV_M_AHD":152,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.919","geometry":{"type":"Point","coordinates":[146.31812493,-20.05762833]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":919,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2128016","IGSN":"10273/AU2128016","SAMPLENO":2128016,"SAMPLE_ID":"DPTH009","AGE_MA":467,"AGE_MA_UNCERTAINTY":5.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":"GA6247","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 479-445 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":3929,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU3929","STRAT_UNIT_NAME":"Charters Towers Metamorphics","INFORMAL_UNIT_NAME":"Charters Towers Metamorphics/ms","UNIT_NAME_SOURCE":"Charters Towers Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Charters Towers Metamorphics are a belt of low-pressure-high temperature metamorphic rocks which crop out in a discontinuous, broadly east-west belt over 150 km long. The rocks consist of quartz-biotite-plagioclase schist, cordierite-quartz-biotite-schist, quartzite, and minor calc-silicate rocks. Peak amphibolite-grade metamorphic conditions are indicated by the presence of sillimanite and migmatite. The absence of garnet has been used to infer low pressure relative to temperature. The unit shows a well-developed foliation, which trends north-west and dips steeply to the north-east, and includes localised isoclinal folding. The age of the unit is constrained by the intrusion of the Bucklands Hill Diorite which was dated at 508 +/- 7 Ma (Hutton and others, 1997). The sample site is a railway cutting to the east of town near the intrusive contact with the Columbia Creek Complex. The sample (2128016/DPTH009) is a dark grey, fine-grained plagioclase-muscovite-biotite-quartz-?cordierite schist with minor banding, which resembles cross bedding. It contains abundant sericitically altered grains, some of which have hexagonal habits (cordierite?).","SAMPLING_FEATURE_NAME":"DPTH009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS550803","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Charters Towers Province","GEOLOGICAL_REGION_NAME":"Charters Towers Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.0576283274,"LONG_GDA94":146.3181249254,"ELEV_M_AHD":279,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-10-04","SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983","AGE_ENTRY_DATE":"2015-01-21","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.918","geometry":{"type":"Point","coordinates":[146.31812493,-20.05762833]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":918,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2128016","IGSN":"10273/AU2128016","SAMPLENO":2128016,"SAMPLE_ID":"DPTH009","AGE_MA":465.9,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.43,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6189","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 481-457 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":3929,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU3929","STRAT_UNIT_NAME":"Charters Towers Metamorphics","INFORMAL_UNIT_NAME":"Charters Towers Metamorphics/ms","UNIT_NAME_SOURCE":"Charters Towers Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Charters Towers Metamorphics are a belt of low-pressure-high temperature metamorphic rocks which crop out in a discontinuous, broadly east-west belt over 150 km long. The rocks consist of quartz-biotite-plagioclase schist, cordierite-quartz-biotite-schist, quartzite, and minor calc-silicate rocks. Peak amphibolite-grade metamorphic conditions are indicated by the presence of sillimanite and migmatite. The absence of garnet has been used to infer low pressure relative to temperature. The unit shows a well-developed foliation, which trends north-west and dips steeply to the north-east, and includes localised isoclinal folding. The age of the unit is constrained by the intrusion of the Bucklands Hill Diorite which was dated at 508 +/- 7 Ma (Hutton and others, 1997). The sample site is a railway cutting to the east of town near the intrusive contact with the Columbia Creek Complex. The sample (2128016/DPTH009) is a dark grey, fine-grained plagioclase-muscovite-biotite-quartz-?cordierite schist with minor banding, which resembles cross bedding. It contains abundant sericitically altered grains, some of which have hexagonal habits (cordierite?).","SAMPLING_FEATURE_NAME":"DPTH009","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS550803","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Charters Towers Province","GEOLOGICAL_REGION_NAME":"Charters Towers Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.0576283274,"LONG_GDA94":146.3181249254,"ELEV_M_AHD":279,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-10-04","SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952; 70749","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.; Purdy, D.J., Cross, A.J., Brown, D.D., Carr, P.A., Armstrong, R.A., 2016. New constraints on the origin and evolution of the Thomson Orogen and links with central Australia from isotopic studies of detrital zircons. Gondwana Research, 39, 41-56.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983; https://doi.org/10.1016/j.gr.2016.06.10","AGE_ENTRY_DATE":"2015-01-21","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7360","geometry":{"type":"Point","coordinates":[122.33439,-32.6428]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7360,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124033","IGSN":"10273/AU2124033","SAMPLENO":2124033,"SAMPLE_ID":"194705","AGE_MA":1161,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":39,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Although most analyses are well grouped, the oldest and youngest results are significantly different from the mean, which could imply prolonged, or multiple phases of, monazite growth.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"metasyenogranite, Cowalinya Pool","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"syenogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"metasyenogranite","SAMPLING_FEATURE_NAME":"194705","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS546235","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Fraser Zone","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-32.6428,"LONG_GDA94":122.33439,"ELEV_M_AHD":302,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-04-28","SAMPLE_ORIGINATOR":"Geological Survey of Western Australia (GSWA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD and Spaggiari, CV 2011, 194705: metasyenogranite, Cowalinya Pool; Geochronology Record 988: Geological Survey of Western Australia, 4p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/194705.2.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1559","geometry":{"type":"Point","coordinates":[132.96975231,-22.0997837]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1559,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2129471","IGSN":"10273/AU2129471","SAMPLENO":2129471,"SAMPLE_ID":"NB11EEB348","AGE_MA":1574,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6199","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":6195,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6195","STRAT_UNIT_NAME":"Ennugan Mountains Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Ennugan Mountains Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Several zones of strongly foliated biotite-muscovite-quartz rock, up to 2 m wide, occur in porphyritic granite on top of a prominent ridge in the central part of, and enclosed within, the Ennugan Mountains Granite. The sample obtained for geochronology is coarse-grained and composed primarily of abundant strongly foliated biotite. Field photograph of strongly sheared and foliated biotite-muscovite-quartz rock, large strained muscovite ‘fish’ and fine-grained polygonal quartz. It is enriched in F, U, Th, REE and various other trace elements and metals (Beyer et al 2012). These deformed biotite-rich rocks may be rafts of sheared and metasomatised metapelitic country rock (Beyer et al., 2012), or represent highly altered and deformed Ennugan Mountains Granite. Dating of zircon and monazite from this sample will elucidate between these potential origins in understanding the origin of this rock and its relationship to the enclosing granite (magmatic crystallisation age: 1621 ± 5 Ma, NB11EEB319A).","SAMPLING_FEATURE_NAME":"NB11EEB348","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS557140","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.0997836957,"LONG_GDA94":132.9697523141,"ELEV_M_AHD":648,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68998","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., Close, D.F., Hallett, L., Dunkley, D.J., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Ngalia Basin,Tanami Region and Murphy Province July 2011-June 2012. Northern Territory Geological Survey Record, 2013-004, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82463","AGE_ENTRY_DATE":"2012-06-06","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7365","geometry":{"type":"Point","coordinates":[127.61193,-26.08747]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7365,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2003491","IGSN":"10273/AU2003491","SAMPLENO":2003491,"SAMPLE_ID":"194422","AGE_MA":1142,"AGE_MA_UNCERTAINTY":14,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":3.2,"NUMBER_OF_ANALYSES":44,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wirku Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"quartzite","SAMPLING_FEATURE_NAME":"194422","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS516396","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Block","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.08747,"LONG_GDA94":127.61193,"ELEV_M_AHD":501,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-12-02","SAMPLE_ORIGINATOR":"Smithies, R.H.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD and Evins, PM 2010, 194422: quartzite, Cohn Hill; Geochronology Record 864: Geological Survey of Western Australia, 5p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/194422.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.955","geometry":{"type":"Point","coordinates":[133.76465957,-26.01425447]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":955,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2129473","IGSN":"10273/AU2129473","SAMPLENO":2129473,"SAMPLE_ID":"R1850740","AGE_MA":1147,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6197","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":39078,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU39078","STRAT_UNIT_NAME":"Pitjantjatjara Supersuite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Pitjantjatjara Supersuite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample comes from the central northern part of the mapsheet where early anatectic granite (Mp21) is intruded by a porphyritic granite pluton (Mp17). The anatectic granite contains numerous rafts and blocks of Birksgate Complex gneisses (Mr28). It is a massive pale pinkish micro-granitoid composed of subequal abundances of translucent grey quartz, white plagioclase, pale pink K-feldspar, and minor dark ferromagnesian grains. This sample initially crystallised as a massive micro-monzogranitic assemblage of K-feldspar + quartz + plagioclase + minor biotite + trace others (opaques, titanite). Following crystallisation, weak alteration generated minor new sericite + chlorite + epidote: sericite +/- epidote formed by partial replacement of some plagioclase grains, and most biotite was replaced by chlorite +/- epidote.","SAMPLING_FEATURE_NAME":"R1850740","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS557141","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.0142544733,"LONG_GDA94":133.7646595679,"ELEV_M_AHD":496,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2012-02-21","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-26","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3820","geometry":{"type":"Point","coordinates":[137.05903994,-33.3113576]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3820,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055439","IGSN":"10273/AU2055439","SAMPLENO":2055439,"SAMPLE_ID":"R1721025","AGE_MA":2507,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample resembles the unnamed gneissic granite of Fraser et al. (2010), being medium to coarse grained, dominated by K-feldspar and showing a moderate to strong gneissic foliation. The gneissic foliation is defined by variations in quartz-feldspar or biotite-rich mesosomes. The sample shows some retrogression, with fine chlorite-bearing fractures present in places. Where possible, sections of rock that show such evidence for retrogression were avoided in sample collection and preparation. The sample is from a small, <5 m wide, enclave of gneissic material within a large pink granite body. Sample R1721025 is a foliated granodiorite augen gneiss with partly sericitised plagioclase, partly chloritised biotite +/- epidote +/- pumpellyite. This sample is a quartz-rich possible granodiorite transitional towards tonalite with abundant augen of irregularly sericitised, partly antiperthitic plagioclase and less abundant K-feldspar (microcline) to 4 or 5 mm in diameter. There are also smaller grains of plagioclase and less abundant microcline. Rare myrmekite occurs on plagioclase-K-feldspar grain boundaries. Lenses and lamellae of quartz are unusually abundant and contain anhedral grains mostly parallel to the foliation also defined by partly altered biotite and later limonite-filled fractures. Quartz is extensively recrystallised, and shows undulose extinction. The quartz c-axes are mostly at a low angle to the foliation in a tectonic fabric. Biotite is fine grained and largely foliated except where it is enclosed in feldspar. At least half of the biotite has been altered to chlorite, rarely with epidote or pumpellyite. Rare yellow grains seem to represent altered allanite and there are accessory opaque oxide grains locally rimmed by leucoxene, possibly ex-titanite.","SAMPLING_FEATURE_NAME":"R1721025","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527759","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-33.3113575978,"LONG_GDA94":137.0590399421,"ELEV_M_AHD":143,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68133","AGE_REF":"Jagodzinski, E.A., Reid, A., Farrell, F., 2011. Project PGC01-05: Geochronology of gneissic, granitic and gabbroic rocks from west of the Middleback Range. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects. Geological Survey of South Australia. Report Book, 2011/00003, 63-94.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3831","geometry":{"type":"Point","coordinates":[136.89431987,-33.58745215]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3831,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2109658","IGSN":"10273/AU2109658","SAMPLENO":2109658,"SAMPLE_ID":"R1779864","AGE_MA":380,"AGE_MA_UNCERTAINTY":75,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":13,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6145","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample is a weakly foliated, white quartz-feldspar-biotite +/- garnet granite that appears to be a thicker portion of the in situ leucosomes observed within the metasediment, and is therefore inferred to be derived from melting of similar metasedimentary rocks, possibly deeper in the metamorphic pile. Garnet is a very minor mineral, observed in one or two zones within the otherwise compositionally uniform granite. In thin section, the polygonal granitic texture has been partly overprinted by subgrain development and dynamic recrystallisation of quartz, which in places appears to be weakly aligned, suggesting a shape preferred orientation that has been developed during deformation of the granite. Quartz also shows undulose extinction. Plagioclase is commonly sericite-altered, the presence of which reveals internal zonation of the plagioclase in some instances. The K-feldspar is probably microcline and is revealed by cross hatch twinning within smaller, possibly interstitial grains between the dominant plagioclase and quartz. The microcline is dynamically recrystallised only partially, showing small subgrains developed at the margins of large crystals. Microcline also shows deformation lamellae in places. Both biotite and muscovite are interpreted to be of magmatic origin and are minor constituents of the rock occurring randomly throughout. Biotite is brown to light brown in colour and shows pleochroic haloes due to radiation damage from accessory mineral, possibly zircon. Garnet is also a minor component (<2%) and shows some degree of fracturing, with the fractures being filled by green mineral, possibly chlorite. The presence of garnet, muscovite and biotite suggests that this granite is of an S-type character, derived from a peraluminous source.","SAMPLING_FEATURE_NAME":"DDH BUDD 28","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH529590","BOREHOLE_TOP_DEPTH_M":240.5,"BOREHOLE_BASE_DEPTH_M":244,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-33.587452155,"LONG_GDA94":136.8943198678,"ELEV_M_AHD":90,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68132","AGE_REF":"Jagodzinski, E.A., Reid, A., Farrell, F., 2011. Project PGC01-04: Geochronology of the Bungalow Prospect. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects. Geological Survey of South Australia. Report Book, 2011/00003, 42-62.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1009","geometry":{"type":"Point","coordinates":[146.10557169,-17.84282868]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1009,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2132757","IGSN":"10273/AU2132757","SAMPLENO":2132757,"SAMPLE_ID":"BB5433A","AGE_MA":451.8,"AGE_MA_UNCERTAINTY":2.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.44,"NUMBER_OF_ANALYSES":31,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6219","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"metamorphic","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":1117,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU1117","STRAT_UNIT_NAME":"Barnard Metamorphics","INFORMAL_UNIT_NAME":"Barnard Metamorphics/m","UNIT_NAME_SOURCE":"Barnard Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The analysed sample was collected from a prominent outcrop forming part of a small headland at the northern end of Narragon Beach, north of Mission Beach settlement. The rocks of the headland are close to the contact with late Ordovician granite of the Mission Beach Granite Complex (part of the Macrossan Igneous Association). The country rocks have been extensively deformed, metamorphosed to upper amphibolite grade, and are cut by dykes of granite (sensu lato) and (meta-)dolerite. The outcrop comprises dark greyish green, compositionally banded, fine- to medium-grained amphibolite with numerous very thin to thin, irregular, pale coloured lenses and lenticles. The analysed sample consists mainly of a fine-grained (average grainsize ~0.3 mm) aggregate of hornblende and an unidentified, turbid mineral(s) representing extensively altered plagioclase?. The hornblende grains show a preferred alignment and are pleochroic in shades of pale brown or, less commonly, greenish brown. The pale coloured lenses consist predominantly of irregular grains of clinopyroxene up to ~5 mm long. Traces of titanite, zircon, opaques, quartz and clinozoisite are also present.","SAMPLING_FEATURE_NAME":"BB5433A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS559478","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Barnard Province","GEOLOGICAL_REGION_NAME":"Cairns Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-17.842828677,"LONG_GDA94":146.1055716946,"ELEV_M_AHD":1,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70033","AGE_REF":"Kositcin, N., Purdy, D.J., Brown, D.D., Bultitude, R.J., Carr, P., 2015. Summary of results. Joint GSQ-GA geochronology project: Thomson Orogen and Hodgkinson Province, 2012-2013. Queensland Geological Record, 2015/02, 68p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr092149","AGE_ENTRY_DATE":"2015-05-26","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3870","geometry":{"type":"Point","coordinates":[134.19386522,-28.46875329]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3870,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2004103","IGSN":"10273/AU2004103","SAMPLENO":2004103,"SAMPLE_ID":"R1707908","AGE_MA":1521,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.81,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6124","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Banded quartz-feldspar-biotite gneiss with reddish feldspar bands and dark biotite-rich bands. Laminated and foliated quartz-feldspar-biotite-hornblende gneiss with sericite-clay-chlorite alteration, and a layer-parallel foliation. Accessory opaque oxide, apatite and zircon to 0.25 mm. Trace fine pyrite and chalcopyrite. This sample has plagioclase-rich, quartz-bearing lamellae to 15 mm wide and finely laminated units to 25 mm or more in width with biotite-rich lamellae alternating with plagioclase-quartz-rich lamellae on a millimetre-scale. The quartzofeldspathic bands are partly coarse-grained with quartz as much as 4 to 8 mm in different layers and plagioclase to 3 mm in grainsize, with sericite and hematite staining. The finely laminated areas have grains mostly less than 1.5 mm long. The biotite has clay-chlorite alteration and is strongly foliated. The biotite lamellae also contain minor green hornblende, partly granular and partly poikiloblastic with abundant small inclusions of quartz. Anhedral plagioclase and quartz also occur in and between biotite-hornblende lamellae. Minor opaque oxide to 1 mm long is disseminated together with accessory apatite and zircon to 0.25 mm in grainsize. The oxide is mostly magnetite veined and rimmed by hematite, and there are sparsely disseminated grains and aggregates of pyrite +/- chalcopyrite to 1 mm or more in length.","SAMPLING_FEATURE_NAME":"GOMA DH4","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH534727","BOREHOLE_TOP_DEPTH_M":510.4,"BOREHOLE_BASE_DEPTH_M":510.6,"GEOLOGICAL_PROVINCE":"Nawa Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.4687532852,"LONG_GDA94":134.1938652222,"ELEV_M_AHD":269,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69203; 69554","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Dutch, R., 2013. Zircon and monazite geochronology via SHRIMP and LA-ICPMS for the northern Gawler Craton, from 2009 GOMA drilling. Geological Survey of South Australia. Report Book, 2013/00013, 73p.; Reid, A.J., Jagodzinski, E.A., Armit, R.J., Dutch, R.A., Kirkland, C.L., Betts, P.G., Schaefer, B.F., 2014. U-Pb and Hf isotopic evidence for Neoarchean and Paleoproterozoic basement in the buried northern Gawler Craton, South Australia. Precambrian Research, 250, 127-142.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010634; https://doi.org/10.1016/j.precamres.2014.05.019","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3822","geometry":{"type":"Point","coordinates":[137.04652862,-33.24147905]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3822,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2055440","IGSN":"10273/AU2055440","SAMPLENO":2055440,"SAMPLE_ID":"R1721026","AGE_MA":2507,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":25,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6136","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample is a plagioclase-rich, grey gneissic granite. There are some probable K-feldspar megacrysts up to 1 cm wide; however, the majority of the rock is medium grained. The gneissic foliation is moderately developed and the rock does not appear strongly sheared in most places. In the field, this sample was considered to be a likely correlative of the Cooyerdoo Granite of Fraser et al. (2010). Sample R1721026 is an inequigranular, heterogeneous, biotite granodiorite with sparse hornblende. It contains accessory opaque oxide, apatite and rare zircon. Secondary minerals include sericite, chlorite, epidote and pyrite. It is a K-feldspar-rich granodiorite: inequigranular and heterogeneous with quartz and feldspars varying from very fine-grained to about 3 mm in grainsize in most of the thin section. However, larger lenses of quartz have ragged interlocking grains to 7 mm long. Some of the larger plagioclase grains contain patches of microcline and/or quartz and the K-feldspar is locally perthitic with rare myrmekite. Weak irregular alteration to sericite is evident. The opaque oxide occurs as grains to 3 mm long with apatite and biotite, but there are also separate apatite grains. The biotite occurs in small aggregates and is unoriented with rare chlorite alteration. Rare zircon is enclosed in biotite. A small patch, 5 x 3 mm, contains all of the hornblende in this thin section, accompanied by epidote and mostly limonitised pyrite. The hornblende-epidote-pyrite aggregate may be secondary.","SAMPLING_FEATURE_NAME":"R1721026","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS527760","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-33.2414790514,"LONG_GDA94":137.0465286211,"ELEV_M_AHD":177,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68133","AGE_REF":"Jagodzinski, E.A., Reid, A., Farrell, F., 2011. Project PGC01-05: Geochronology of gneissic, granitic and gabbroic rocks from west of the Middleback Range. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects. Geological Survey of South Australia. Report Book, 2011/00003, 63-94.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1553","geometry":{"type":"Point","coordinates":[132.14006461,-22.1786194]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1553,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124454","IGSN":"10273/AU2124454","SAMPLENO":2124454,"SAMPLE_ID":"NB10EEB063","AGE_MA":1573.6,"AGE_MA_UNCERTAINTY":1.5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6191","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":24556,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24556","STRAT_UNIT_NAME":"Wangala Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wangala Granite Schist","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample is an unusual biotite-apatite schist which is enclosed in the peraluminous Wangala Granite. The schist is coarse-grained and contains approx. 60% biotite and 25% apatite, the rest of the assemblage is made up of quartz, muscovite and accessory zircon. The sample contains abundant complexly-zoned zircon which has been U-Pb dated by LA-ICPMS at PRISE, ANU. Cores gave an upper intercept age of 1769 +/- 9 Ma while thick U-rich rims gave an upper intercept age of 1570 +/- 30 Ma. Unusual rim compositions (U, Th, P, Y, REE enrichment) lead to BSE-imaging of some of the zircons (by David Huston, GA) and it was found that many of the zircons contain micro-inclusions of monazite, thorite and barite; it is likely these were inadvertently being ablated during laser analysis and producing the unusual rim chemistries. It is hoped that SHRIMP dating of the monazite inclusions will help with interpretation of the history and/or origin of the schists and their relationship to the enclosing granite.","SAMPLING_FEATURE_NAME":"NB10EEB063","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS546811","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.1786193984,"LONG_GDA94":132.1400646144,"ELEV_M_AHD":713,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-06-28","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68998","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., Close, D.F., Hallett, L., Dunkley, D.J., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Ngalia Basin,Tanami Region and Murphy Province July 2011-June 2012. Northern Territory Geological Survey Record, 2013-004, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82463","AGE_ENTRY_DATE":"2012-06-18","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3991","geometry":{"type":"Point","coordinates":[144.50731671,-18.87620604]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3991,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2122059","IGSN":"10273/AU2122059","SAMPLENO":2122059,"SAMPLE_ID":"IWGT003","AGE_MA":1602,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6165","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":39609,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU39609","STRAT_UNIT_NAME":"Oasis Metamorphics","INFORMAL_UNIT_NAME":"Oasis Metamorphics-PLEo/1","UNIT_NAME_SOURCE":"Oasis Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"calc-silicate gneiss","SAMPLING_FEATURE_NAME":"IWGT003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS534600","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Greenvale Province","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.8762060447,"LONG_GDA94":144.507316707,"ELEV_M_AHD":557,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Withnall, I.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3992","geometry":{"type":"Point","coordinates":[144.50731671,-18.87620604]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3992,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2122059","IGSN":"10273/AU2122059","SAMPLENO":2122059,"SAMPLE_ID":"IWGT003","AGE_MA":459,"AGE_MA_UNCERTAINTY":30,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6165","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of hydrothermal event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":39609,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU39609","STRAT_UNIT_NAME":"Oasis Metamorphics","INFORMAL_UNIT_NAME":"Oasis Metamorphics-PLEo/1","UNIT_NAME_SOURCE":"Oasis Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"calc-silicate gneiss","SAMPLING_FEATURE_NAME":"IWGT003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS534600","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Greenvale Province","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.8762060447,"LONG_GDA94":144.507316707,"ELEV_M_AHD":557,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Withnall, I.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3994","geometry":{"type":"Point","coordinates":[144.50731671,-18.87620604]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3994,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2122059","IGSN":"10273/AU2122059","SAMPLENO":2122059,"SAMPLE_ID":"IWGT003","AGE_MA":456,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.77,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":"GA6173","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of hydrothermal event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":39609,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU39609","STRAT_UNIT_NAME":"Oasis Metamorphics","INFORMAL_UNIT_NAME":"Oasis Metamorphics-PLEo/1","UNIT_NAME_SOURCE":"Oasis Metamorphics (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Surface Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"calc-silicate gneiss","SAMPLING_FEATURE_NAME":"IWGT003","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS534600","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Greenvale Province","GEOLOGICAL_REGION_NAME":"Georgetown Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.8762060447,"LONG_GDA94":144.507316707,"ELEV_M_AHD":557,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Withnall, I.W.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69952","AGE_REF":"Cross, A.J., Dunkley, D.J., Bultitude, R.J., Brown, D.D., Purdy, D.J., Withnall, I.W., von Gnielinski, F.E., Blake, P.R., 2015. Summary of results Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen and Mount Isa region, 2010-2012. Queensland Geological Record, 2015/01, 138p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr090983","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3834","geometry":{"type":"Point","coordinates":[137.18474049,-33.13586828]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3834,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2109660","IGSN":"10273/AU2109660","SAMPLENO":2109660,"SAMPLE_ID":"R1779867","AGE_MA":205,"AGE_MA_UNCERTAINTY":90,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.32,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6145","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The granite interval selected was from a central portion of a thick (~15 m) equigranular medium-grained granite phase. The granite sample contained a number of quartz veins that carry coarse-grained chalcopyrite; however, these veins have been cut out of the portion that has been sent for mineral separation. The upper contact of this portion of granite is extensively brecciated and altered; however, the weak foliation present within the granite is parallel to the main lithological and tectonic foliation present within the surrounding metasediments. The lower contact, at around 176 m, appears to likewise be brecciated, with epidotisation and silicification. The sample is an inequigranular leucogranite that shows a pervasive foliation defined by dynamically recystallised quartz. Medium grained, <2 mm sized K-feldspar crystals are intergrown with quartz and lesser plagioclase. These coarser sized crystals are surrounded by a fine grained dynamically recrystallised matrix of equigranular quartz. Plagioclase is strongly sericitised and partly hematite altered, giving rise to the red appearance of the section. Biotite is rare in this granite, with only a few small lamellae observed in thin section. Opaque species are present particularly along grain boundaries and may represent an alteration phase.","SAMPLING_FEATURE_NAME":"DDH ML001DD","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH529592","BOREHOLE_TOP_DEPTH_M":135.3,"BOREHOLE_BASE_DEPTH_M":137.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-33.1358682816,"LONG_GDA94":137.1847404868,"ELEV_M_AHD":157,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68136","AGE_REF":"Jagodzinski, E.A., Reid, A., Johnson, G., 2011. Project PGC01-09: Host rock ages of the Moola Cu-Au Prospect, east of the Middleback Range. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects. Geological Survey of South Australia. Report Book, 2011/00003, 127-143.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010247","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-24"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.903","geometry":{"type":"Point","coordinates":[115.3192958,-34.0646392]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":903,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124222","IGSN":"10273/AU2124222","SAMPLENO":2124222,"SAMPLE_ID":"Sue 1 3073.2-3073.7","AGE_MA":680,"AGE_MA_UNCERTAINTY":110,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2,"NUMBER_OF_ANALYSES":34,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6179","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Sixty-four analyses were collected from 54 zircons, with 10 zircons (5, 44-47, and 50-54) each analysed twice, primarily to investigate core-rim relationships. A total of 20 analyses are considered unreliable, and were excluded from further consideration on the following grounds: (i) Nine are characterised by elevated common Pb (206Pbc > 1%), indicating either leakage of radiogenic Pb, ingress of ambient Pb, or both. (ii) Four are characterised by very high U contents (2849-5947 ppm), as well as relatively high UO/U values (6.25-7.13, relative to a total range of 5.68-5.95 for 66 measurements of the reference zircons). This combination of parameters indicates loss of crystallinity in the analysed domains due to radiation damage to the zircon lattice. Whilst such domains are capable of retaining syn-crystallisation 207Pb/206Pb values, their calibrated 238U/206Pb values are inevitably compromised by the enhanced sputtering of Pb relative to U from zones of amorphous material (e.g. White and Ireland, 2012), and their plotted positions on Concordia diagrams are unreliable. (iii) Three are characterised by very large uncertainties in 207Pb/206Pb (8-18% [1sigma]) despite U contents exceeding 150 ppm and Mesoproterozoic apparent ages. These large uncertainties reflect large variations in measured Pb-isotope abundances as each analysis progressed, despite the absence of concomitant variation in parent U and Th species. Such patterns have previously been interpreted to reflect 'unsupported' or redistributed radiogenic Pb, but Kusiak et al. (2015) demonstrated that in at least some zircons subjected to a complex geological history, these isotopic patterns are attributable to the presence of nanospheres of native Pb, most commonly developed post-crystallisation within zircons that have experienced a polyphase high-grade metamorphic history. (iv) Four are characterised by a large degree of discordance (>30%), indicating significant recent loss of radiogenic Pb from these domains. The remaining 44 accepted analyses are subdivided into two broad clusters: (i) Six analyses of inherited cores, identified both texturally (as distinct, usually bright-CL domains) and chemically. Their U contents are varied (116-1470 ppm) but mostly low (median 191 ppm), and their Th/U is relatively high (0.66-1.43, median 1.00). Most of the analyses are near-concordant, and their 207Pb/206Pb dates are dispersed between c. 1620 Ma and c. 1180 Ma. (ii) Thirty-eight analyses of (a) discrete crystals with broad banded CL zoning parallel to the long axes, and (b) broad banded rims that have disconformably overgrown inherited cores in rounded grains. Their U contents are varied (359-2009 ppm) but mostly moderate (median 698 ppm), their Th/U is relatively low (0.02-0.48, median 0.08), and their 207Pb/206Pb dates are dispersed between c. 1160 Ma and c. 850 Ma. Within this cluster of 38 analyses, four potential outliers are discerned: (i) Three analyses with slightly elevated Th/U (0.28-0.48), which are excluded on the possibility that they represent pre-1170 Ma zircon components that have undergone substantial isotopic resetting during the event responsible for crystallisation of the other zircons with similar 207Pb/206Pb dates but lower Th/U (0.02-0.23) in this cluster. (ii) One analysis characterised by a slightly higher degree of normal discordance (12%) than the other analyses in this cluster, and which is interpreted to be affected by recent loss of radiogenic Pb. The weighted mean 207Pb/206Pb date of the remaining 34 analyses displays significant excess scatter, well beyond that attributable to analytical uncertainty (MSWD = 7.9), but younger 207Pb/206Pb dates are correlated with younger 238U/206Pb dates, which suggests that the cluster has been affected by post-crystallisation loss of radiogenic Pb and/or partial isotopic resetting during a non-recent event.Notwithstanding the residual excess scatter in the Discordia regression, the upper intercept of 1076 +/- 35","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sue 1 is a petroleum exploration well, drilled in the southern Perth Basin by West Australian Petroleum Pty Ltd (WAPET) in 1966 (Williams and Nicholls, 1966). The total depth of the hole was 3074.2 m, with drilling terminated in crystalline basement rocks of the southern Pinjarra Orogen. A segment of drillcore (3073.2-3073.7 m), described as 'gneissic, medium- to coarse-grained biotite granite' (J.E. Glover in Williams and Nicholls, 1966; see also Peers and Trendall, 1968), was sampled for zircon separation and U-Pb SHRIMP analysis. This rock is a felsic orthogneiss comprising 50-55% K-feldspar (predominantly microcline, and showing local perthitic or myrmekitic texture), 20% quartz, 10-15% plagioclase (partly sericitised and/or saussuritised following hydrothermal alteration), 5-8% biotite (partially altered to chlorite), and minor muscovite. Accessory minerals include apatite, and euhedral to rounded zircon. Some prismatic zircons feature pyramidal terminations with well-developed facets, consistent with a magmatic origin. Aligned micas define a moderate to strong foliation, and this rock probably represents a deformed granite. The high feldspar content and presence of two micas probably indicates a peraluminous composition, possibly reflecting partial melting of a sedimentary protolith.","SAMPLING_FEATURE_NAME":"Sue 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH15767","BOREHOLE_TOP_DEPTH_M":3073.2,"BOREHOLE_BASE_DEPTH_M":3073.7,"GEOLOGICAL_PROVINCE":"Pinjarra Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-34.0646392,"LONG_GDA94":115.3192958,"ELEV_M_AHD":86,"ACCURACY_M":100,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Sircombe, K.N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70879","AGE_REF":"Bodorkos, S., Fitzsimons, I.C.W., Hall, L.S., Sircombe, K.N., Lewis, C.J., 2016. Beneath the Perth Basin: New U-Pb SHRIMP zircon ages from the Pinjarra Orogen, Western Australia, 2016. Geoscience Australia. Record, 2016/31, 27p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/record.2016.031","AGE_ENTRY_DATE":"2016-10-21","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4332","geometry":{"type":"Point","coordinates":[136.07518522,-22.64781478]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4332,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999622","IGSN":"10273/AU1999622","SAMPLENO":1999622,"SAMPLE_ID":"2009087024","AGE_MA":456,"AGE_MA_UNCERTAINTY":25,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":37,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6132","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Pgf","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unnamed biotite granodiorite, Pgf, intrudes the Bonya Schist and Mascotte Gneiss Complex, and occurs in the Northern Bonya Hills, occupying low-lying areas, dotted with low irregular and rough hills. The sample is a cream-coloured, medium-grained, foliated, locally porphyritic non-magnetic muscovite granodiorite. The specimen is visually estimated to consist of alkali feldspar (>60%), quartz (~25%), plagioclase, commonly altered to sericite (~5%), muscovite and biotite (~4%) and secondary chlorite.","SAMPLING_FEATURE_NAME":"2009087024","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513341","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6478147783,"LONG_GDA94":136.0751852222,"ELEV_M_AHD":408,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-06-20","SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68150","AGE_REF":"Kositcin, N., Magee, C.W., Whelan, J.A., Champion, D.C., 2011. New SHRIMP geochronology from the Arunta Region: 2009-2010. Geoscience Australia. Record, 2011/14, 61p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/71585","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1531","geometry":{"type":"Point","coordinates":[135.40502432,-22.71958292]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1531,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999637","IGSN":"10273/AU1999637","SAMPLENO":1999637,"SAMPLE_ID":"2009087033","AGE_MA":1710,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.56,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6134","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Biotite Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unnamed biotite granite, Pga, intrudes the Kanandra Granulite and forms numerous small tors and low hills, within and between the Delny-Mount Sainthill and Entire Point Shear zones (Shaw et al., 1984). Most outcrops are deeply weathered, silicified, and covered in spinifex. This sample is a red to red-brown, medium- to coarse-grained, biotite granite, locally porphyritic and strongly lineated (mica layering in places). The sample contains biotite, garnet, K-feldspar and lesser plagioclase (commonly altered to epidote). Garnet occurs as trails of rounded garnet crystals or aggregates.","SAMPLING_FEATURE_NAME":"2009087033","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513350","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7195829151,"LONG_GDA94":135.4050243189,"ELEV_M_AHD":487,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-06-20","SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68150","AGE_REF":"Kositcin, N., Magee, C.W., Whelan, J.A., Champion, D.C., 2011. New SHRIMP geochronology from the Arunta Region: 2009-2010. Geoscience Australia. Record, 2011/14, 61p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/71585","AGE_ENTRY_DATE":"2012-02-29","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7361","geometry":{"type":"Point","coordinates":[127.68581,-26.07263]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7361,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2000796","IGSN":"10273/AU2000796","SAMPLENO":2000796,"SAMPLE_ID":"194433","AGE_MA":1156,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wirku Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"pelitic gneiss","SAMPLING_FEATURE_NAME":"194433","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513644","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.07263,"LONG_GDA94":127.68581,"ELEV_M_AHD":480,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-08-12","SAMPLE_ORIGINATOR":"Geological Survey of Western Australia (GSWA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD and Evins, PM 2011, 194433: pelitic gneiss, Minnie Hill; Geochronology Record 930: Geological Survey of Western Australia, 4p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/194433.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7366","geometry":{"type":"Point","coordinates":[116.1431,-25.38754]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7366,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1957273","IGSN":"10273/AU1957273","SAMPLENO":1957273,"SAMPLE_ID":"185942","AGE_MA":1997,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":3.3,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"concordia age of 1997 +/- 7 Ma. MSWD = 2.5. N = 7","AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"pelitic diatexite, Paradise Well","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"pelitic migmatite","SAMPLING_FEATURE_NAME":"185942","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS454587","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Yilgarn Craton","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-25.38754,"LONG_GDA94":116.1431,"ELEV_M_AHD":317,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-05-06","SAMPLE_ORIGINATOR":"Geological Survey of Western Australia (GSWA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Wingate, MTD, Kirkland, CL, Johnson, SP and Sheppard, S 2010, 185942: pelitic diatexite, Paradise Well; Geochronology Record 861: Geological Survey of Western Australia, 5p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/185942.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8131","geometry":{"type":"Point","coordinates":[148.22259076,-20.62905598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8131,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1953976","IGSN":"10273/AU1953976","SAMPLENO":1953976,"SAMPLE_ID":"200701514","AGE_MA":291,"AGE_MA_UNCERTAINTY":0.9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.67,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: two-stage column separation","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: unknown model","LABORATORY_NAME":"University of British Columbia","AGE_INTERPRETED_FROM_SOURCE":"high-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":75659,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU75659","STRAT_UNIT_NAME":"Key Creek Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Key Creek Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample of biotite paragneiss was collected from an outcrop in a creek bed ~50 m N of Normanby Road, on Sutherland station ~40 km SSE of Collinsville. The Key Creek Gneiss forms an extensive (~265 km2) metamorphic complex located in the centre of the Urannah Batholith. The rocks within the complex are mainly upper amphibolite-grade paragneisses, which have a distinctive elevated thorium response on radiometric images. The analysed sample comprises mainly quartz, feldspar, andalusite (commonly extensively altered), biotite and muscovite, with minor garnet, traces of apatite, zircon, and monazite, and scattered quartz inclusions. Previous geochronology on this sample includes SHRIMP U-Pb zircon analysis and Isotope Dilution Thermal Ionisation Mass Spectrometry (ID-TIMS) U-Pb monazite analyses (sample 1953976/RJB2913; Cross et al. 2012a). SHRIMP U-Pb zircon geochronology of two Key Creek Gneiss samples reported by Cross et al. (2012a) gave metamorphic ages of 297.0 +/- 2.7 Ma and 298.2 +/- 6.9 Ma (samples: 1980488/BB4952, 1953976/RJB2913 respectively).These SHRIMP U-Pb zircon ages, derived from analyses of low Th/U metamorphic rims, are in contrast to the ID-TIMS U-Pb monazite age determination for one of these samples (1953976/RJB2913) which gave an age of 291.0 +/- 0.9 Ma (Cross et al. 2012a). These ages led Cross et al. (2012a) to suggest that metamorphism within the metamorphic complex, was a protracted event between ~300 Ma and ~290 Ma. The IDTIMS U-Pb monazite age determination of 291.0 +/- 0.9 Ma reported for sample 1953976/RJB2913 (Cross et al., 2012a) is, however, somewhat equivocal as three of the six fractions analysed were interpreted to have possibly undergone Pb-loss, and were consequently not used in the age calculation. Therefore, an additional isotopic study of these monazites was undertaken by SHRIMP U-Pb to further examine the metamorphic crystallisation age of these grains.","SAMPLING_FEATURE_NAME":"200701514","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS451604","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":"Proserpine Region","REGION_NAME_SOURCE":"New England Region","STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.62905598,"LONG_GDA94":148.2225907619,"ELEV_M_AHD":469,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-07-29","SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68901","AGE_REF":"Cross, A.J., Bultitude, R.J., Purdy, D.J., 2013. Summary of Results - Joint GSQ-GA Geochronology Project: Ayr, Bowen, Eulo, Mount Coolon, Proserpine and Warwick 1:250 000 sheet areas. Queensland Geological Record, 2012/19, 146p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr089851","AGE_ENTRY_DATE":"2021-01-15","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3528","geometry":{"type":"Point","coordinates":[137.26658243,-33.27561538]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3528,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1958088","IGSN":"10273/AU1958088","SAMPLENO":1958088,"SAMPLE_ID":"2008371050","AGE_MA":1764,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6063","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed granite","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unnamed granite - east of Moonabie HS","SAMPLING_FEATURE_NAME":"2008371050","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS455038","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Spencer Domain","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-33.2756153803,"LONG_GDA94":137.266582425,"ELEV_M_AHD":124,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-05-23","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1494","geometry":{"type":"Point","coordinates":[135.00952943,-23.35747436]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1494,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1977570","IGSN":"10273/AU1977570","SAMPLENO":1977570,"SAMPLE_ID":"IC08JAW910","AGE_MA":1704,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":3012,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU3012","STRAT_UNIT_NAME":"Bungitina metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Pelitic Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Fine-grained garnet-sillimanite-biotite schistose gneiss, containing garnet porphyroclasts 0.3 cm across, migmatitic in places.  Approximately 40 m true thickness; interlayered with kyanite-sillimanite-muscovite feldspar schistose gneiss.  Kyanite grew during cooling: crystal growth is randomly oriented and cross cuts the sillimanite lineation.  Meta-sedimentary units overlie fine-grained laminated quartzofeldspathic gneiss, and are intruded by coarse-grained intermediate to mafic igneous rocks.  Although the contact was not observed here, the Bruna Granitic Gneiss sits structurally above these meta-sediments, which were previously mapped as part of Bungitina Metamorphics.","SAMPLING_FEATURE_NAME":"IC08JAW910","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS457308","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.3574743564,"LONG_GDA94":135.0095294306,"ELEV_M_AHD":564,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-10-09","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1495","geometry":{"type":"Point","coordinates":[135.00952943,-23.35747436]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1495,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1977570","IGSN":"10273/AU1977570","SAMPLENO":1977570,"SAMPLE_ID":"IC08JAW910","AGE_MA":445,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.86,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":3012,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU3012","STRAT_UNIT_NAME":"Bungitina metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Pelitic Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Fine-grained garnet-sillimanite-biotite schistose gneiss, containing garnet porphyroclasts 0.3 cm across, migmatitic in places.  Approximately 40 m true thickness; interlayered with kyanite-sillimanite-muscovite feldspar schistose gneiss.  Kyanite grew during cooling: crystal growth is randomly oriented and cross cuts the sillimanite lineation.  Meta-sedimentary units overlie fine-grained laminated quartzofeldspathic gneiss, and are intruded by coarse-grained intermediate to mafic igneous rocks.  Although the contact was not observed here, the Bruna Granitic Gneiss sits structurally above these meta-sediments, which were previously mapped as part of Bungitina Metamorphics.","SAMPLING_FEATURE_NAME":"IC08JAW910","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS457308","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.3574743564,"LONG_GDA94":135.0095294306,"ELEV_M_AHD":564,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-10-09","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3519","geometry":{"type":"Point","coordinates":[137.44318768,-32.86229518]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3519,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1958092","IGSN":"10273/AU1958092","SAMPLENO":1958092,"SAMPLE_ID":"2008371054","AGE_MA":531,"AGE_MA_UNCERTAINTY":210,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6062","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":23777,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23777","STRAT_UNIT_NAME":"McGregor Volcanics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous volcanic rock","LITHOLOGY":"igneous volcanic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"volcanic in Moonabie Fm - SE Mt Whyalla","SAMPLING_FEATURE_NAME":"2008371054","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS455042","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Spencer Domain","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.8622951774,"LONG_GDA94":137.4431876836,"ELEV_M_AHD":157,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-05-23","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66528; 68158","AGE_REF":"Fraser, G.L., Neumann, N.L., 2010. New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.; Szpunar, M., Fraser, G., 2010. Age of deposition and provenance of Palaeoproterozoic basins on north-eastern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2010/00008, 26p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348; https://pid.sarig.sa.gov.au/document/d20010218","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1500","geometry":{"type":"Point","coordinates":[134.28215316,-22.87306941]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1500,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978297","IGSN":"10273/AU1978297","SAMPLENO":1978297,"SAMPLE_ID":"AC08EEB411","AGE_MA":1584,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077; GA6094","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79086,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79086","STRAT_UNIT_NAME":"Bleechmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Bleechmore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained, garnet-rich leucogneiss/migmatite that lies within mostly high-grade metasediments and mafic granulites of the Bleechmore Granulite. The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3742","geometry":{"type":"Point","coordinates":[134.28215316,-22.87306941]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3742,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978297","IGSN":"10273/AU1978297","SAMPLENO":1978297,"SAMPLE_ID":"AC08EEB411","AGE_MA":1531,"AGE_MA_UNCERTAINTY":15,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077; GA6094","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":79086,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79086","STRAT_UNIT_NAME":"Bleechmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained, garnet-rich leucogneiss/migmatite that lies within mostly high-grade metasediments and mafic granulites of the Bleechmore Granulite. The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3743","geometry":{"type":"Point","coordinates":[134.28215316,-22.87306941]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3743,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978297","IGSN":"10273/AU1978297","SAMPLENO":1978297,"SAMPLE_ID":"AC08EEB411","AGE_MA":1741,"AGE_MA_UNCERTAINTY":19,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6156","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":79086,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79086","STRAT_UNIT_NAME":"Bleechmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained, garnet-rich leucogneiss/migmatite that lies within mostly high-grade metasediments and mafic granulites of the Bleechmore Granulite. The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4334","geometry":{"type":"Point","coordinates":[144.44276326,-18.80577514]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4334,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1980483","IGSN":"10273/AU1980483","SAMPLENO":1980483,"SAMPLE_ID":"2007167007-01","AGE_MA":583,"AGE_MA_UNCERTAINTY":130,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":35,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6081","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24416,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24416","STRAT_UNIT_NAME":"Mywyn Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mywyn Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Mywyn Granite is an S-type, strongly foliated, feldspar porphyritic biotite granite, of cream-pink colour and of likely Proterozoic age (i.e., Forsayth Supersuite; Warnick and Withnall, 1985; Warnick, 1989). The Oasis uranium prospect is hosted by a north-trending, moderately to steeply west-dipping shear zone which cuts the Mywyn Granite. The Mywyn Granite has a very high background gamma-ray spectrometric signature, and the uranium in these deposits was probably mobilised from the granite (Withnall et al., 1997a). The sample, a foliated, feldspar-porphyritic biotite granite with patchy biotite-albite altered zones, was collected from drill hole 06LYD004 (depth 114.4-118.9 m) in order to determine the emplacement age of the Mywyn Granite, and a maximum age for U mineralisation. [Neumann & Kositcin (GA 2011/38) incorrectly identified the drillhole as LYD002. The true location of drillhole 06LYD004 is MGA94 Zone 55, 230469 mE, 7918723 mN.]","SAMPLING_FEATURE_NAME":"06LYD004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH452904","BOREHOLE_TOP_DEPTH_M":114.4,"BOREHOLE_BASE_DEPTH_M":118.9,"GEOLOGICAL_PROVINCE":"Etheridge Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.8057751447,"LONG_GDA94":144.4427632569,"ELEV_M_AHD":442,"ACCURACY_M":5,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Huston, D.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67341","AGE_REF":"Neumann, N.L., Kositcin, N., 2011. New SHRIMP U-Pb zircon ages from North Queensland 2007-2010. Geoscience Australia. Record, 2011/38, 82p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/72648","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.771","geometry":{"type":"Point","coordinates":[148.23547942,-20.66590606]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":771,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1980488","IGSN":"10273/AU1980488","SAMPLENO":1980488,"SAMPLE_ID":"200801505B","AGE_MA":297,"AGE_MA_UNCERTAINTY":2.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6096","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. 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Summary of Results - Joint GSQ-GA Geochronology Project: Ayr, Bowen, Eulo, Mount Coolon, Proserpine and Warwick 1:250 000 sheet areas. Queensland Geological Record, 2012/19, 146p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr089851","AGE_ENTRY_DATE":"2013-06-17","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4000","geometry":{"type":"Point","coordinates":[133.62358348,-30.41116846]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4000,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1987336","IGSN":"10273/AU1987336","SAMPLENO":1987336,"SAMPLE_ID":"R1633847","AGE_MA":2409,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.76,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6085","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Aristarchus prospect is a Ni-Cu sulphide prospect hosted by an interpreted layered mafic/ultramafic intrusive complex. The original Mines and Energy Drilling program consisted of two diamond drill holes and nine reverse circulation holes that intersected metamorphosed, largely cumulus-textured ultramafic to mafic rocks that have been intruded by granitoids. The felsic rocks of the Aristarchus prospect, as represented by sample R1633847, preserve a gneissic foliation that is defined by biotite +/- hornblende alignment along with a shape-preferred fabric of quartz and feldspar elongation. Folding is commonly observed within the felsic gneisses, as are some spectacular examples of boudinage indicating the felsic gneisses have been subject to variable strain during the Sleafordian Orogeny. Sample R1633847 is a felsic gneiss of granitic composition, being dominated by granoblastic textured quartz, K-feldspar with lesser plagioclase, along with around 20% biotite. Biotite occurs as clots or defining a tectonic foliation within the granoblastic gneiss. Quartz shows both coarse- and medium-grain sizes, the latter being largely recrystallised subgrains developed at the margins of larger grains. These may record a younger phase of dynamic recrystallisation to the main granoblastic texture.","SAMPLING_FEATURE_NAME":"DMDD-002","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH547737","BOREHOLE_TOP_DEPTH_M":210.9,"BOREHOLE_BASE_DEPTH_M":211.8,"GEOLOGICAL_PROVINCE":"Cleve Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.4111684591,"LONG_GDA94":133.623583482,"ELEV_M_AHD":136,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4001","geometry":{"type":"Point","coordinates":[133.62358348,-30.41116846]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4001,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1987336","IGSN":"10273/AU1987336","SAMPLENO":1987336,"SAMPLE_ID":"R1633847","AGE_MA":2453,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.13,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6085","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Aristarchus prospect is a Ni-Cu sulphide prospect hosted by an interpreted layered mafic/ultramafic intrusive complex. 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The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. 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Aggregates of amphibole are commonly zoned from pale green magnesian cores to darker more Al and Fe-rich rims. Also of note are poikioblastic hornblende grains that contain abundant plagioclase inclusions. These poikioblastic hornblendes are typically pale green in colour and thus likely more magnesian in composition. It is possible that these poikioblastic hornblende+plagioclase aggregates formed after original, magmatic pyroxene. Opaque oxides, to 2 mm long, have rims of fine-grained titanite (sphene), whereas minor pyrite, to 0.8 mm in grainsize, is cubic and has no rims. Unpublished microprobe data identifies many of the opaque species as magnetite. Minor granular apatite is disseminated throughout the rock. Hairline fractures that cut through the rock seem to contain K-feldspar +/- chlorite, and may be responsible for the fluids that have sericitised much of the plagioclase.","SAMPLING_FEATURE_NAME":"DMDD-002","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH547737","BOREHOLE_TOP_DEPTH_M":187.9,"BOREHOLE_BASE_DEPTH_M":188.4,"GEOLOGICAL_PROVINCE":"Cleve Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.4111684591,"LONG_GDA94":133.623583482,"ELEV_M_AHD":136,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69550","AGE_REF":"Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. 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Aggregates of amphibole are commonly zoned from pale green magnesian cores to darker more Al and Fe-rich rims. Also of note are poikioblastic hornblende grains that contain abundant plagioclase inclusions. These poikioblastic hornblendes are typically pale green in colour and thus likely more magnesian in composition. It is possible that these poikioblastic hornblende+plagioclase aggregates formed after original, magmatic pyroxene. Opaque oxides, to 2 mm long, have rims of fine-grained titanite (sphene), whereas minor pyrite, to 0.8 mm in grainsize, is cubic and has no rims. Unpublished microprobe data identifies many of the opaque species as magnetite. Minor granular apatite is disseminated throughout the rock. 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Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1505","geometry":{"type":"Point","coordinates":[133.74423118,-22.14588014]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1505,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978302","IGSN":"10273/AU1978302","SAMPLENO":1978302,"SAMPLE_ID":"AC08CJE271A","AGE_MA":1763,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":69780,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU69780","STRAT_UNIT_NAME":"Lander Rock Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Qtz-felds-bio metapsammitic gneiss, with occasional narrow leucosomes, interpreted to be an amphibolite facies equivalent of the 1860-1830 Ma Lander Rock Formation. The sample is from the easternmost exposures of this unit, and sporadic outcrop trends NW into mapped Lander Rock Formation (MOUNT PEAKE). Metamorphic age should correspond with the 1810-1800 Stafford Event. It is separated from the Aileron Metamorphics sample (CJE222) by the NW trending Woolanga Lineament, interpreted as the northern and western boundary of rocks affected by the Chewings Orogeny.","SAMPLING_FEATURE_NAME":"AC08CJE271A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460573","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.1458801426,"LONG_GDA94":133.7442311797,"ELEV_M_AHD":575,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3701","geometry":{"type":"Point","coordinates":[132.15816041,-22.2564364]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3701,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2123765","IGSN":"10273/AU2123765","SAMPLENO":2123765,"SAMPLE_ID":"NB11EEB284","AGE_MA":1753,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.28,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6170","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24429,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24429","STRAT_UNIT_NAME":"Ngalurbindi Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample is a coarse-grained granitic augen gneiss. The Ngalurbindi Orthogneiss is interpreted as intruded by the Wangala Granite in the latter's southernmost outcrops. However it bears a striking resemblance to the rapakivi phase of the Wangala and therefore it is important to determine a magmatic age for this unit to resolve its relationship to the Wangala Granite which is known to be ~1780 Ma. Any rims ages would help establish which metamorphic events, if any, the orthogneiss has seen.","SAMPLING_FEATURE_NAME":"NB11EEB284","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS546031","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.2564363957,"LONG_GDA94":132.1581604129,"ELEV_M_AHD":711,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-06-28","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68998","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., Close, D.F., Hallett, L., Dunkley, D.J., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Ngalia Basin,Tanami Region and Murphy Province July 2011-June 2012. Northern Territory Geological Survey Record, 2013-004, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82463","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1507","geometry":{"type":"Point","coordinates":[134.69229045,-22.51143542]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1507,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978303","IGSN":"10273/AU1978303","SAMPLENO":1978303,"SAMPLE_ID":"AC07LCV356B","AGE_MA":1676,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":26516,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26516","STRAT_UNIT_NAME":"Delmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Delmore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Upper-amphibolite facies bt-qtz-fspr+-gt pelitic gneiss with thin leucocratic melt selvages (qtz-fspr+-gt±tourm) parallel to gneissosity. Previous SHRIMP dating of a cordierite-anthophyllite rock from the Delmore Metamorphics (AC07LCV293a) yielded a poorly constrained maximum deposition age of 1821±11 Ma. This sample was generally poor in zircon so it hoped that sample AC08LCV356b will yield sufficient zircon to enable us to i) produce a statistically meaningful detrital age spectrum, ii) better constrain the max. dep. age from detrital cores, and iii) analyse metamorphic grains/rims and more clearly identify isotopic resetting during the Strangways, and possibly Yambah, Events.","SAMPLING_FEATURE_NAME":"AC07LCV356B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460574","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.5114354178,"LONG_GDA94":134.6922904493,"ELEV_M_AHD":556,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4161","geometry":{"type":"Point","coordinates":[143.05641644,-18.67560793]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4161,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999372","IGSN":"10273/AU1999372","SAMPLENO":1999372,"SAMPLE_ID":"2009165047","AGE_MA":1549,"AGE_MA_UNCERTAINTY":26,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.02,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6108","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":25687,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU25687","STRAT_UNIT_NAME":"Candlow Formation","INFORMAL_UNIT_NAME":"Candlow Formation/3","UNIT_NAME_SOURCE":"Candlow Formation (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid volcanic rock","LITHOLOGY":"igneous volcanic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The sample was collected from drillhole GSQ Georgetown 4, by Ian Withnall (GSQ), and comprises material from two depth intervals (153.39-158.13 m and 160.20-161.64 m) which were combined prior to processing for zircon. The sample is a volcanic rock within the Candlow Formation, Etheridge Province of the Georgetown Inlier. The Candlow Formation lies stratigraphically above the Lane Creek Formation and is therefore potentially younger than the ca. 1655 Ma leucogabbro sill in that unit (Withnall et al., 1988; Black et al., 1998; Baker et al., 2010). Black and McCulloch (1984) completed Sm-Nd analysis on the volcanic rock within the Candlow Formation which indicates a juvenile magmatic input. This juvenile magmatic input was dismissed by Black and McCulloch (1984) as alteration effects. However more detailed isotopic work by Lambeck (2011) and Lambeck et al. (2012) suggests the juvenile input is part of a larger juvenile volcanic suite that is represented throughout Proterozoic Australia. The volcanic unit was interpreted by A. Lambeck and I.Withnall to have basal peperitic textures. Dating the volcanic rock was thought to be able to provide direct timing of felsic magmatism and sedimentation in the Georgetown Inlier.","SAMPLING_FEATURE_NAME":"GSQ Georgetown 4","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH11343","BOREHOLE_TOP_DEPTH_M":153.39,"BOREHOLE_BASE_DEPTH_M":161.64,"GEOLOGICAL_PROVINCE":"Etheridge Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-18.6756079323,"LONG_GDA94":143.0564164439,"ELEV_M_AHD":285,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-05-21","SAMPLE_ORIGINATOR":"Lambeck, A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68986","AGE_REF":"Lambeck, A., 2011, Basin analysis and the geochemical signature of Paleoproterozoic sedimentary successions in northern Australia: Constraints on basin development in respect to mineralisation and paleoreconstruction models. PhD. thesis, 157p.","AGE_PUBLICATION_LINKS":"https://librarysearch.adelaide.edu.au/permalink/61ADELAIDE_INST/rinku3/alma99205924401811","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1525","geometry":{"type":"Point","coordinates":[136.34539395,-22.93287251]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1525,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999599","IGSN":"10273/AU1999599","SAMPLENO":1999599,"SAMPLE_ID":"2009087001","AGE_MA":1744,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.94,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6132","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79232,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79232","STRAT_UNIT_NAME":"Denara Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Gneiss Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unnamed gneissic granite, pЄd (now Denara Orthogneiss) occurs some 35 km east of the Jervois Homestead (Shaw et al., 1984) as isolated outcrops surrounded by extensive soil and sand covered plains. The dominant rock type is quartzofeldspathic gneiss which commonly grades into biotite gneiss. Migmatite occurs as concordant and discordant leucosomes in both the quartzofeldspathic and biotite gneiss. This sample is a silicified, lineated, coarse-grained gneissic granite. It is reasonably magnetic (magnetic susceptibility  values: 16.2, 28.8, 10.7, 16.1×10-3 SI units).","SAMPLING_FEATURE_NAME":"2009087001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513318","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.9328725099,"LONG_GDA94":136.345393947,"ELEV_M_AHD":299,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-06-20","SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68150","AGE_REF":"Kositcin, N., Magee, C.W., Whelan, J.A., Champion, D.C., 2011. New SHRIMP geochronology from the Arunta Region: 2009-2010. Geoscience Australia. Record, 2011/14, 61p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/71585","AGE_ENTRY_DATE":"2012-02-29","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4331","geometry":{"type":"Point","coordinates":[136.12367642,-22.66562868]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4331,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999614","IGSN":"10273/AU1999614","SAMPLENO":1999614,"SAMPLE_ID":"2009087016","AGE_MA":381,"AGE_MA_UNCERTAINTY":84,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.07,"NUMBER_OF_ANALYSES":44,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6132","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":80337,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU80337","STRAT_UNIT_NAME":"Cappocks Granodiorite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample is a white-grey-green, medium- to coarse-grained biotite granodiorite. It is slightly foliated, contains pink K-feldspar, is locally hornblende-bearing and contains magnetite (magnetic susceptibility values: 20.7, 15.4, 18.5, 18.9, 20.4, 16.8×10-3 SI units).","SAMPLING_FEATURE_NAME":"2009087016","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513333","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6656286785,"LONG_GDA94":136.1236764246,"ELEV_M_AHD":386,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-06-20","SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68150","AGE_REF":"Kositcin, N., Magee, C.W., Whelan, J.A., Champion, D.C., 2011. New SHRIMP geochronology from the Arunta Region: 2009-2010. Geoscience Australia. 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Compilation of new SHRIMP U-Pb geochronological data for the Southern Curnamona Province, South Australia, 2010. Geological Survey of South Australia. 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New SHRIMP U-Pb zircon ages from the Gawler Craton and Curnamona Province, South Australia, 2008-2010. Geoscience Australia. Record, 2010/16, 256p.","AGE_PUBLICATION_LINKS":"http://pid.geoscience.gov.au/dataset/ga/70348","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7339","geometry":{"type":"Point","coordinates":[127.8,-26.31]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7339,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1977990","IGSN":"10273/AU1977990","SAMPLENO":1977990,"SAMPLE_ID":"189540","AGE_MA":1177,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":45,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wirku Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"pelitic gneiss","SAMPLING_FEATURE_NAME":"189540","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS457529","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Block","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.31,"LONG_GDA94":127.8,"ELEV_M_AHD":469,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-10","SAMPLE_ORIGINATOR":"Smithies, R.H.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Wingate, MTD and Smithies, RH 2010, 189540: pelitic gneiss, Mount Blyth; Geochronology Record 865: Geological Survey of Western Australia, 6p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/189540.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1508","geometry":{"type":"Point","coordinates":[134.69229045,-22.51143542]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1508,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978303","IGSN":"10273/AU1978303","SAMPLENO":1978303,"SAMPLE_ID":"AC07LCV356B","AGE_MA":1579,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":26516,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26516","STRAT_UNIT_NAME":"Delmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Delmore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Upper-amphibolite facies bt-qtz-fspr+-gt pelitic gneiss with thin leucocratic melt selvages (qtz-fspr+-gt±tourm) parallel to gneissosity. Previous SHRIMP dating of a cordierite-anthophyllite rock from the Delmore Metamorphics (AC07LCV293a) yielded a poorly constrained maximum deposition age of 1821±11 Ma. This sample was generally poor in zircon so it hoped that sample AC08LCV356b will yield sufficient zircon to enable us to i) produce a statistically meaningful detrital age spectrum, ii) better constrain the max. dep. age from detrital cores, and iii) analyse metamorphic grains/rims and more clearly identify isotopic resetting during the Strangways, and possibly Yambah, Events.","SAMPLING_FEATURE_NAME":"AC07LCV356B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460574","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.5114354178,"LONG_GDA94":134.6922904493,"ELEV_M_AHD":556,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1510","geometry":{"type":"Point","coordinates":[134.29266516,-22.68911904]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1510,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978304","IGSN":"10273/AU1978304","SAMPLENO":1978304,"SAMPLE_ID":"AC08LCV819","AGE_MA":1554,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.5,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79087,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79087","STRAT_UNIT_NAME":"Chiripee Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Chiripee Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Granulite-grade gt-bt-sill-qtz-fspr gneiss. This unit comprises interbedded pelite-psammopelite and minor quartzite sequences with numerous gt-bearing qtz-fspr leucogranitic melt veins. It is interlayered with subordinate gt-bearing mafic granulite. There is no previous dating for this unit so we're interested in obtaining a detrital age spectrum from zircon cores and metamorphic age/s from rims to compare with the Bleechmore, Kanandra and Aileron granulites.","SAMPLING_FEATURE_NAME":"AC08LCV819","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460575","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6891190378,"LONG_GDA94":134.2926651567,"ELEV_M_AHD":623,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-11","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3998","geometry":{"type":"Point","coordinates":[133.51266211,-30.30262314]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3998,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1987335","IGSN":"10273/AU1987335","SAMPLENO":1987335,"SAMPLE_ID":"R1562986","AGE_MA":2445,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.67,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6085","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24842,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24842","STRAT_UNIT_NAME":"Christie Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R1562986 is a coarse grained, migmatised, quartz-plagioclase-microcline-cordierite-garnet gneiss from drillhole CD-1. At the hand specimen scale, layering is defined by alignment of biotite in melanocratic microlithons. Garnet porphyroblasts are coarse grained, up to 4 cm wide, and are typically elongate parallel to the main gneissic foliation. Quartz-feldspar is developed as leucocratic segregations adjacent many of the garnets, most likely indicating the garnet has grown via biotite breakdown reaction with the production of quartz-feldspar melt associated with this reaction. In thin section, quartz shows both polygonal-textured, coarse-grained forms, and also some zones of medium- to fine-grained recrystallisation. Quartz grain boundaries are typically lobate, indicative of high temperature recrystallisation. Feldspar occurs as both plagioclase and microcline, with the former the dominant species and the latter being perthitic in nature. Numerous examples of myrmekite are observed, also indicative of high temperature metamorphic conditions. Garnet occurs as coarse grained, anhedral porphyroblasts that show quartz +/- biotite inclusions and are typically rimmed by light brown biotite that is most likely a product of retrograde breakdown of garnet. Cordierite is also seen in thin section as coarse grains intergrown with quartz and in some instances with fine-grained biotite (+/- sillimanite?) rims. Opaque species, possibly ilmenite, are common as irregular shaped grains within the quartz-feldspar matrix. Zircon and monazite is abundant within the rock, with the former occurring as large euhedral to subhedral grains, often with prominent radiation damage halos within biotite.","SAMPLING_FEATURE_NAME":"Mt Christie CD-1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444927","BOREHOLE_TOP_DEPTH_M":105.99,"BOREHOLE_BASE_DEPTH_M":106.93,"GEOLOGICAL_PROVINCE":"Cleve Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.3026231377,"LONG_GDA94":133.5126621104,"ELEV_M_AHD":205,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68128; 69550","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Fraser, G., 2009. Compilation of SHRIMP U-Pb geochronological data for the Mulgathing Complex, Gawler Craton, South Australia, 2007-09. Geological Survey of South Australia. Report Book, 2009/00016, 119p.; Reid, A.J., Jagodzinski, E.A., Fraser, G.L., Pawley, M.J., 2014. SHRIMP U-Pb zircon age constraints on the tectonics of the Neoarchean to early Paleoproterozoic transition within the Mulgathing Complex, Gawler Craton, South Australia. Precambrian Research, 250, 27-49.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010154; https://doi.org/10.1016/j.precamres.2014.05.013","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1498","geometry":{"type":"Point","coordinates":[134.28215316,-22.87306941]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1498,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978297","IGSN":"10273/AU1978297","SAMPLENO":1978297,"SAMPLE_ID":"AC08EEB411","AGE_MA":464,"AGE_MA_UNCERTAINTY":38,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6156","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79086,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79086","STRAT_UNIT_NAME":"Bleechmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Bleechmore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained, garnet-rich leucogneiss/migmatite that lies within mostly high-grade metasediments and mafic granulites of the Bleechmore Granulite. The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-13","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1499","geometry":{"type":"Point","coordinates":[134.28215316,-22.87306941]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1499,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1978297","IGSN":"10273/AU1978297","SAMPLENO":1978297,"SAMPLE_ID":"AC08EEB411","AGE_MA":1713,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.81,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6077; GA6094","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79086,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79086","STRAT_UNIT_NAME":"Bleechmore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Bleechmore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Coarse-grained, garnet-rich leucogneiss/migmatite that lies within mostly high-grade metasediments and mafic granulites of the Bleechmore Granulite. The sample was taken well within the unit to distinguish it from the previously dated sample of Maidment et al (2005) which was sampled just below the contact with the Mendip Metamorphics to the north of the main Bleechmore Granulite.","SAMPLING_FEATURE_NAME":"AC08EEB411","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS460565","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8730694102,"LONG_GDA94":134.2821531578,"ELEV_M_AHD":680,"ACCURACY_M":10,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2008-11-26","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1522","geometry":{"type":"Point","coordinates":[134.39719535,-22.60374669]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1522,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999296","IGSN":"10273/AU1999296","SAMPLENO":1999296,"SAMPLE_ID":"AC09CJE394","AGE_MA":1686,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6100","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79087,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79087","STRAT_UNIT_NAME":"Chiripee Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Delny Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unmelted amphibolite-facies psammitic gneiss: aim to get good max dep age (and hopefully c. 1590 Ma metamorphic age) to link Delny Gneiss (to north) with high-grade Chiripee (with younger apparent max dep age) to the south.","SAMPLING_FEATURE_NAME":"AC09CJE394","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513046","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6037466931,"LONG_GDA94":134.3971953501,"ELEV_M_AHD":574,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-07-20","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1523","geometry":{"type":"Point","coordinates":[134.39719535,-22.60374669]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1523,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1999296","IGSN":"10273/AU1999296","SAMPLENO":1999296,"SAMPLE_ID":"AC09CJE394","AGE_MA":1718,"AGE_MA_UNCERTAINTY":18,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6100","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79087,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79087","STRAT_UNIT_NAME":"Chiripee Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Delny Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unmelted amphibolite-facies psammitic gneiss: aim to get good max dep age (and hopefully c. 1590 Ma metamorphic age) to link Delny Gneiss (to north) with high-grade Chiripee (with younger apparent max dep age) to the south.","SAMPLING_FEATURE_NAME":"AC09CJE394","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS513046","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6037466931,"LONG_GDA94":134.3971953501,"ELEV_M_AHD":574,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-07-20","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68997","AGE_REF":"Bodorkos, S., Beyer, E.E., Edgoose, C.J., Whelan, J.A., Webb, G., Vandenberg, L.C., Hallett, L., 2013. Summary of results. Joint NTGS-GA geochronology project: Central and eastern Arunta Region, January 2008-June 2011. Northern Territory Geological Survey Record, 2013-003, 66p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82462","AGE_ENTRY_DATE":"2013-06-12","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1137","geometry":{"type":"Point","coordinates":[135.06660202,-22.46662679]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1137,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306966","IGSN":"10273/AU2306966","SAMPLENO":2306966,"SAMPLE_ID":"HU15BLR957","AGE_MA":1727,"AGE_MA_UNCERTAINTY":52,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":10.4,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6309","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Loose, upper intercept age of rims","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":24455,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24455","STRAT_UNIT_NAME":"Perenti Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Perenti Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of Perenti Metamorphics was collected from a ~20 m2 pavement outcrop approximately 1 km west of Tower Rock in southern Macdonald Downs. Sample HU15BLR957 is a migmatite that has mm-scale banding between biotite-bearing melanocratic layers and biotite-absent leucosomes. Melanosomes comprise sub-mm quartz, plagioclase, and K-feldspar, with up to 5 vol % sub-mm biotite, and 5–10 vol % 2–4 mm long sillimanite that is elongate in the direction of the main foliation. Leucocratic layers comprise elongate anhedral 1–4 mm poikiloblastic K-feldspar that includes sub-mm rounded cordierite, quartz, and plagioclase; and 1–2 mm anhedral quartz, cordierite, plagioclase, and sub-mm sillimanite that is perpendicular to the main gneissosity. All phases are stretched and elongate in the main foliation with the exception of sillimanite in the leucosomes.","SAMPLING_FEATURE_NAME":"HU15BLR957","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598080","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Georgina Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4666267887,"LONG_GDA94":135.0666020191,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2019-08-10","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13482","geometry":{"type":"Point","coordinates":[137.71055881,-34.61199524]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13482,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169188","IGSN":"10273/AU2169188","SAMPLENO":2169188,"SAMPLE_ID":"R2017320","AGE_MA":1571,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6270","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":23126,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23126","STRAT_UNIT_NAME":"Wallaroo Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Drillhole PYD003 lies in the central southern Yorke Peninsula and intersected well-foliated equigranular pink granite. Much of the microgranite has clots of biotite that, together with the elongated quartz-feldspar, form the prominent foliation within the rock. The core also shows zones of K-feldspar and hematite alteration and there are some zones of brecciation that overprint the foliation of the microgranite. Interlayered with the felsic rocks are thin zones of biotite +/- hornblende-rich mafic rock, now amphibolite. This sample represents the felsic rock from this drillhole, and was targeted for analysis in order constrain the age of the basement in this region of the Yorke Peninsula. In thin section, this sample is a medium-grained quartz-K-feldspar gneiss, with lesser biotite and magnetite. The quartz is dynamically recrystallised and is part of a granoblastic texture, with a prominent shape preferred orientation. Plagioclase is strongly altered to sericite-quartz-hematite. The K-feldspar shows multiple twinning and is likely microcline. An opaque species is present throughout the rock, likely magnetite that is intergrown with the quartz-feldspar matrix. Biotite is present as green laths intergrown with the quartz-feldspar matrix. The biotite is extensively altered to green chlorite. Minor epidote alteration also appears to affect some of the micas. In places, rhombs of calcite are also present, and are part of the chlorite-hematite alteration assemblage. Hematite is distributed as fine blebby alteration throughout the plagioclase-biotite portion of the rock mass, and grain boundaries are typically reddened by microscopic hematite. This hematite gives the rock its reddish colour.","SAMPLING_FEATURE_NAME":"PYD003","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH575536","BOREHOLE_TOP_DEPTH_M":94.4,"BOREHOLE_BASE_DEPTH_M":94.9,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.6119952387,"LONG_GDA94":137.710558813,"ELEV_M_AHD":129,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71356","AGE_REF":"Jagodzinski, E.A., Reid, A., Galloway Warland, N., 2017. Project PGC03-08: Yorke Peninsula project of Phoenix Copper Ltd. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 98-118.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2022-11-24","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15256","geometry":{"type":"Point","coordinates":[133.8101177,-27.8036674]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15256,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2168867","IGSN":"10273/AU2168867","SAMPLENO":2168867,"SAMPLE_ID":"R1643427","AGE_MA":1711,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.36,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed gneiss","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"quarter core","SAMPLE_DESC":"(plg-kspar-hbl-mag-ap-bi gneiss) Howard et al 2011 (AJES): plagioclase-k-feldspar-hornblende-magnetite-apatite-biotite gneiss. Late muscovite seritisation occurs in the matrix, and chlorite overgrows hornblende. Grains of potassium feldspar, plagioclase and hornblende are approximately 500 mm in size. Fine-grained matrix minerals including magnetite, apatite and biotite are roughly equigranular and are approximately 250 mm in size. Hornblende forms in elongate clusters of grains that define the foliation.","SAMPLING_FEATURE_NAME":"Middle Bore 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH13455","BOREHOLE_TOP_DEPTH_M":512.1,"BOREHOLE_BASE_DEPTH_M":512.3,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-27.8036674,"LONG_GDA94":133.8101177,"ELEV_M_AHD":258,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67181","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Cutts, K.A., Belousova, E.A., 2011. U-Pb zircon, zircon Hf and whole-rock Sm-Nd isotopic constraints on the evolution of Paleoproterozoic rocks in the northern Gawler Craton. Australian Journal of Earth Sciences, 58(6), 615-638.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2011.594905","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15168","geometry":{"type":"Point","coordinates":[132.56017,-29.30586]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15168,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2168869","IGSN":"10273/AU2168869","SAMPLENO":2168869,"SAMPLE_ID":"R1643444","AGE_MA":1722,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.2,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Undifferentiated Palaeoproterozoic rocks","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"quarter core","SAMPLE_DESC":"(qtz-plg-ksp-chl-gt-bi gneiss) Howard et al 2011 (AJES): quartz-plagioclase-k-feldspar-chlorite-garnet-biotite gneiss. Plagioclase and potassium feldspar have been partially replaced by muscovite.","SAMPLING_FEATURE_NAME":"OBD 05","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620998","BOREHOLE_TOP_DEPTH_M":132.1,"BOREHOLE_BASE_DEPTH_M":132.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.30586,"LONG_GDA94":132.56017,"ELEV_M_AHD":224,"ACCURACY_M":200,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67181","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Cutts, K.A., Belousova, E.A., 2011. U-Pb zircon, zircon Hf and whole-rock Sm-Nd isotopic constraints on the evolution of Paleoproterozoic rocks in the northern Gawler Craton. Australian Journal of Earth Sciences, 58(6), 615-638.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2011.594905","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4333","geometry":{"type":"Point","coordinates":[135.06660202,-22.46662679]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4333,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306966","IGSN":"10273/AU2306966","SAMPLENO":2306966,"SAMPLE_ID":"HU15BLR957","AGE_MA":573,"AGE_MA_UNCERTAINTY":88,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":10.4,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6309","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":24455,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24455","STRAT_UNIT_NAME":"Perenti Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of Perenti Metamorphics was collected from a ~20 m2 pavement outcrop approximately 1 km west of Tower Rock in southern Macdonald Downs. Sample HU15BLR957 is a migmatite that has mm-scale banding between biotite-bearing melanocratic layers and biotite-absent leucosomes. Melanosomes comprise sub-mm quartz, plagioclase, and K-feldspar, with up to 5 vol % sub-mm biotite, and 5–10 vol % 2–4 mm long sillimanite that is elongate in the direction of the main foliation. Leucocratic layers comprise elongate anhedral 1–4 mm poikiloblastic K-feldspar that includes sub-mm rounded cordierite, quartz, and plagioclase; and 1–2 mm anhedral quartz, cordierite, plagioclase, and sub-mm sillimanite that is perpendicular to the main gneissosity. All phases are stretched and elongate in the main foliation with the exception of sillimanite in the leucosomes.","SAMPLING_FEATURE_NAME":"HU15BLR957","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598080","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Georgina Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.4666267887,"LONG_GDA94":135.0666020191,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1139","geometry":{"type":"Point","coordinates":[135.14947898,-22.75816635]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1139,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306967","IGSN":"10273/AU2306967","SAMPLENO":2306967,"SAMPLE_ID":"HU15BLR979","AGE_MA":1729,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.96,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6309","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"interpreted to record metamorphic zircon growth","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":79093,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79093","STRAT_UNIT_NAME":"Kanandra Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Kanandra Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU15BLR979 was collected approximately 6 km west of Dingo Bore in western Dneiper. The sample came from a 3 metre wide zone of migmatitic garnet-sillimanite pelitic gneiss interlayered at a 5-10 m scale with the Carmencita Granulite. Sillimanite is intergrown with biotite in mm to cm biotite-rich layers. Leucocratic layers comprise plagioclase-quartz-garnet. Garnet is mainly in the leucocratic layers of the rock, however a different phase of garnet also occurs as mm grains in the biotite-sillimanite layers.","SAMPLING_FEATURE_NAME":"HU15BLR979","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598081","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.758166354,"LONG_GDA94":135.1494789809,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2018-05-14","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1141","geometry":{"type":"Point","coordinates":[135.4514662,-22.67294457]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1141,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306968","IGSN":"10273/AU2306968","SAMPLENO":2306968,"SAMPLE_ID":"HU15BLR1032A","AGE_MA":1727,"AGE_MA_UNCERTAINTY":18,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":26,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6309","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Loose, upper intercept age of rims","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":23539,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23539","STRAT_UNIT_NAME":"Deep Bore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Deep Bore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU15BLR1032A was collected approximately 6 km northwest of Halfway Dam in eastern Dneiper. The sample is a cordierite–biotite–quartz rock  taken  from a 10 x 5 m hilltop within an area dominated by ca 1793 Ma orthogneiss. This hilltop was interpreted to be either an altered metasedimentary enclave within the orthogneiss or a metasomatised and altered zone of the orthogneiss itself. The rock comprises 30–50 vol% sub-euhedral cm-scale cordierite within a matrix of coarse cm-scale inclusion-free quartz. The cordierite has cm-scale inclusion-rich cores that preserve sub-mm biotite, quartz, rutile, zircon, and monazite. The outer 3–5 mm of the cordierite grains tend to be inclusion-free, or inclusive of mm-scale biotite. Biotite up to 3–5 mm aligned in the main foliation occurs at the boundaries between cordierite grains and away from the quartz-rich portion of the rock. Biotite is intergrown with sillimanite and contains inclusions of rutile, zircon, and monazite.","SAMPLING_FEATURE_NAME":"HU15BLR1032A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598082","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6729445687,"LONG_GDA94":135.4514661969,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2018-05-14","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4222","geometry":{"type":"Point","coordinates":[135.4514662,-22.67294457]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4222,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306968","IGSN":"10273/AU2306968","SAMPLENO":2306968,"SAMPLE_ID":"HU15BLR1032A","AGE_MA":584,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":26,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6309","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":23539,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23539","STRAT_UNIT_NAME":"Deep Bore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU15BLR1032A was collected approximately 6 km northwest of Halfway Dam in eastern Dneiper. The sample is a cordierite–biotite–quartz rock  taken  from a 10 x 5 m hilltop within an area dominated by ca 1793 Ma orthogneiss. This hilltop was interpreted to be either an altered metasedimentary enclave within the orthogneiss or a metasomatised and altered zone of the orthogneiss itself. The rock comprises 30–50 vol% sub-euhedral cm-scale cordierite within a matrix of coarse cm-scale inclusion-free quartz. The cordierite has cm-scale inclusion-rich cores that preserve sub-mm biotite, quartz, rutile, zircon, and monazite. The outer 3–5 mm of the cordierite grains tend to be inclusion-free, or inclusive of mm-scale biotite. Biotite up to 3–5 mm aligned in the main foliation occurs at the boundaries between cordierite grains and away from the quartz-rich portion of the rock. Biotite is intergrown with sillimanite and contains inclusions of rutile, zircon, and monazite.","SAMPLING_FEATURE_NAME":"HU15BLR1032A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598082","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6729445687,"LONG_GDA94":135.4514661969,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1143","geometry":{"type":"Point","coordinates":[135.68333374,-22.75501288]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1143,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306969","IGSN":"10273/AU2306969","SAMPLENO":2306969,"SAMPLE_ID":"HU15BLR777A","AGE_MA":1710,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.56,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6325","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"post-leucosome-crystallisation metamorphic zircon growth","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":80198,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU80198","STRAT_UNIT_NAME":"Jamaica Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Jamaica Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU15BLR777A was collected from approximately 1 km south of Mount Sainthill in central Jinka. This sample is a garnet-bearing migmatitic orthogneiss. Residuum layers comprise sub‑mm biotite, plagioclase, quartz, K-feldspar, and accessory ilmenite. All phases are aligned to form a main foliation. Cm-scale leucosomes are both parallel to the main foliation and cross cutting. Leucosomes comprise 1-5 mm exsolved K-feldspar, sub-mm plagioclase, cm-scale peritectic garnet, and accessory sub-mm ilmenite. Zircon occurs both in the melanocratic layers and in the leucosomes; there is not an obvious morphologic difference in zircon in the two petrographic settings. Monazite occurs in both the leucosomes and melanosomes; however, most of the >10 um-scale monazite occurs in the leucosomes.","SAMPLING_FEATURE_NAME":"HU15BLR777A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598086","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7550128831,"LONG_GDA94":135.6833337432,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2018-05-14","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1145","geometry":{"type":"Point","coordinates":[136.71876813,-12.2854935]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1145,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306974","IGSN":"10273/AU2306974","SAMPLENO":2306974,"SAMPLE_ID":"GV15EEB0014","AGE_MA":1856,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.46,"NUMBER_OF_ANALYSES":28,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6310","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"interpreted to record metamorphic zircon growth","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed calc-silicate rock","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"calc-silicate rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of calc-silicate rock was collected from the southern Melville Bay area, approximately 12 km west of Gove Airport in Gove. Meta-carbonate rocks have previously been identified as xenoliths in S-type granites and as bands of calc-silicate rock in the Melville Bay Metamorphics to the north (Plumb and Roberts 1992; Rawlings et al 1997); calc-silicate xenoliths are also described in undivided Bradshaw Complex in the south (Rawlings et al 1997). New mapping has identified exposures of calc-silicate rock and marble in the southern Melville Bay area. The sampled outcrop comprises pavements and blocky exposures of calc-silicate rock and impure marble. The calc-silicate rock is fine- to medium-grained and contains diopside and garnet (both phases occurring as porphyroblasts up to 1 cm diameter), quartz, wollastonite, calcite, and minor biotite (<2%). Compositional layering is typically centimetre-scale with alternating diopside-rich and poor layers. The metacarbonate succession is intruded by garnet–cordierite– biotite granite of the Drimmie Head Granite. It also occurs locally as xenoliths within the granite.","SAMPLING_FEATURE_NAME":"GV15EEB0014","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598097","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arnhem Province","GEOLOGICAL_REGION_NAME":"Arnhem Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.2854934997,"LONG_GDA94":136.718768134,"ELEV_M_AHD":null,"ACCURACY_M":null,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71605","AGE_REF":"Kositcin, N., Whelan, J.A., Reno, B.L., Kraus, S., Beyer, E.E., 2018. Summary of results: NTGS-GA geochronology project: Arnhem Province, July 2014-June 2016. Northern Territory Geological Survey Record, 2017-008, 37p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87054","AGE_ENTRY_DATE":"2017-11-08","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1098","geometry":{"type":"Point","coordinates":[143.33743287,-12.9803508]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1098,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2165082","IGSN":"10273/AU2165082","SAMPLENO":2165082,"SAMPLE_ID":"PCTH010","AGE_MA":461.5,"AGE_MA_UNCERTAINTY":4.1,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.08,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6253","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":25469,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU25469","STRAT_UNIT_NAME":"Sefton Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Sefton Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Sefton Metamorphics are the only constituent of the Iron Range Province which forms part of the Coen Inlier in eastern Cape York. Outcrop in this area is deeply weathered and generally restricted to fairly small, isolated areas but it is likely that these rocks extend under cover of the Pascoe River and Carpentaria Basins and into the Coral Sea. To date, only large-scale geological mapping and reconnaissance geochronology has been completed. The Sefton Metamorphics dominantly comprise quartz-muscovite schist and also include a significant portion of hematite schist, magnetite schist, phyllite, calc-silicate, marble and greenstone (Willmott and others, 1973). These are metamorphosed to sub-greenschist to greenschist facies (locally amphibolite) and at least four deformations are identified (Blewett and others, 1997). Age constraints are: 1) intrusion of the Weymouth Granite, Kintore Granite, and Blue Mountains Adamellite at ~410-405 Ma (Black and others, 1992a, b), 2) identification of a sponge spicule and organic matter within recrystallised limestone at Bolt Head suggesting a Paleozoic age (Trail and others, 1969), and 3) U-Pb analysis of detrital zircon from a metaconglomerate yielding an imprecise maximum deposition age of ~1200 Ma from five grains between 1062 +/- 29 Ma and 1232 +/- 18 Ma (Blewett and others, 1998). Additionally, Cross and others (in prep.) recently presented a maximum depositional age of ~785 Ma from a drill core sample of the Sefton Metamorphics (2152166/SEF_a). Sample 2165082/PCTH010 is a medium-grained quartz-muscovite schist with accessory garnet. It was collected ~21 km south of Lockhart River township from a small boulder along an old track east of the main Nundah track in the vicinity of Mount Carter.","SAMPLING_FEATURE_NAME":"PCTH010","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS571052","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Iron Range Province","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-12.9803508018,"LONG_GDA94":143.3374328747,"ELEV_M_AHD":36,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Cross, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70207","AGE_REF":"Kositcin, N., Bultitude, R.J., Purdy, D.J., Brown, D.D., Carr, P.A., Lisitsin, V., 2015. Summary of results. Joint GSQ-GA geochronology project: Kennedy Igneous Association, Mossman Orogen, Thomson Orogen and Iron Range Province, 2013-2014. Queensland Geological Record, 2015/03, 154p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr093982","AGE_ENTRY_DATE":"2015-05-26","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1133","geometry":{"type":"Point","coordinates":[136.00455611,-22.69503598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1133,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2180614","IGSN":"10273/AU2180614","SAMPLENO":2180614,"SAMPLE_ID":"HU14BLR672","AGE_MA":1763,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.37,"NUMBER_OF_ANALYSES":29,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6332","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"monazite growth during metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":28387,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28387","STRAT_UNIT_NAME":"Bonya Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Bonya Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU14BLR672 is an andalusite-K-feldspar schist from the Bonya Metamorphics in the Bonya Hills. Andalusite, K-feldspar and sericite-after-cordierite pseudomorphs form cm-scale porphyroblasts with sub-mm inclusions of quartz and biotite. The matrix comprises 1-3 mm biotite intergrown with sillimanite and minor muscovite. Monazite (50-100 micron) occurs both as inclusions in andalusite and in the biotite-sillimanite matrix. Fine (10-20 micron) subrounded and elongate zircons occur throughout the rock, both in the biotite matrix and as inclusions in the andalusite and K-feldspar porphyroblasts.","SAMPLING_FEATURE_NAME":"HU14BLR672","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578733","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6950359822,"LONG_GDA94":136.0045561142,"ELEV_M_AHD":417,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-09-02","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2018-05-14","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13504","geometry":{"type":"Point","coordinates":[134.11928712,-29.87985285]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13504,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2165061","IGSN":"10273/AU2165061","SAMPLENO":2165061,"SAMPLE_ID":"R2016118","AGE_MA":2426,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6251","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Number of analyses corresponds to the youngest component (48% of the population) derived from 3-component mixture modelling of 25 analyses.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":27643,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27643","STRAT_UNIT_NAME":"Kenella Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Kenella Gneiss is defined as a meta-igneous rock within the Mulgathing Complex (Daly and Fanning 1993). However, its relationship with other units in the Mulgathing Complex remains uncertain through lack of exposure and also through the limited geochronology. This sample is a medium- to coarse-grained quartz-K-feldspar dominant, poorly banded but evidently metamorphically recrystallised and hence gneissic rock. There is very little biotite in this sample and the rock is generally pink, with a weak foliation defined by elongation of quartz. In places, small, <2 cm wide yellow-green micaceous patches occur within the rock. These may be chlorite or muscovite clots. It is possible that these clots have formed after garnet. In thin section, this sample is described as a syeno-granite gneiss with a weak shape preferred orientation defined by the alignment of quartz subgrains adjacent larger quartz crystals. K-feldspar is a dominant mineral and contains abundant perthitic exsolution. Minor plagioclase occurs as recrystallised grains intergrown with quartz and K-feldspar forming an inequigranular texture. There is a red colour to the rock, presumably a result of hematite staining within the feldspar crystals. There are hematite-filled fractures that cut the crystalline texture of the rock.","SAMPLING_FEATURE_NAME":"R2016118","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS571013","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mulgathing Complex","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.8798528518,"LONG_GDA94":134.119287115,"ELEV_M_AHD":195,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Outcrop NE of Comet Outstation, Commonwealth Hill.","SAMPLE_ACQUISITION_DATE":"2013-07-31","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71358","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-11: Geochronology of granite and granite gneiss from Apollo Minerals tenements, Commonwealth Hill. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 141-167.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2022-11-25","AGE_LAST_UPDATED":"2022-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4188","geometry":{"type":"Point","coordinates":[134.28522858,-29.88398887]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4188,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169190","IGSN":"10273/AU2169190","SAMPLENO":2169190,"SAMPLE_ID":"R2018160","AGE_MA":2440,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":32,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6271","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Sequoia Prospect is a magnetite iron ore prospect located in the central-eastern Christie Domain. Drilling by the South Australian Department of Mines and Energy in 1997 defined an inferred resource of 22 Mt grading 28.4% Fe, comprising several steeply dipping, laterally discontinuous 2–50 m wide layers of quartz-actinolite-magnetite, actinolite-magnetite, and biotite-quartz-magnetite gneiss (Davies, 2000). The magnetite gneiss is structurally concordant with a banded quartz-magnetite-diopside-hypersthene-amphibole gneiss with-interlayered quartz–microcline–plagioclase gneiss and plagioclase-rich granitoid. This sample is dominated by K-feldspar, which is weakly sericitised and intergrown with plagioclase in a perthitic texture. Minor biotite is light brown. The texture of the rock is granoblastic, however, there is a weak foliation defined by the alignment of recrystallised quartz grains and the minor biotite crystal aggregates. The rock is extensively recrystallised and variably sericite altered.","SAMPLING_FEATURE_NAME":"SE DD 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH575538","BOREHOLE_TOP_DEPTH_M":110.02,"BOREHOLE_BASE_DEPTH_M":110.45,"GEOLOGICAL_PROVINCE":"Christie Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.883988875,"LONG_GDA94":134.2852285773,"ELEV_M_AHD":179,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71358","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-11: Geochronology of granite and granite gneiss from Apollo Minerals tenements, Commonwealth Hill. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 141-167.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4189","geometry":{"type":"Point","coordinates":[134.28522858,-29.88398887]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4189,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169190","IGSN":"10273/AU2169190","SAMPLENO":2169190,"SAMPLE_ID":"R2018160","AGE_MA":2424,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":32,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6271","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Sequoia Prospect is a magnetite iron ore prospect located in the central-eastern Christie Domain. Drilling by the South Australian Department of Mines and Energy in 1997 defined an inferred resource of 22 Mt grading 28.4% Fe, comprising several steeply dipping, laterally discontinuous 2–50 m wide layers of quartz-actinolite-magnetite, actinolite-magnetite, and biotite-quartz-magnetite gneiss (Davies, 2000). The magnetite gneiss is structurally concordant with a banded quartz-magnetite-diopside-hypersthene-amphibole gneiss with-interlayered quartz–microcline–plagioclase gneiss and plagioclase-rich granitoid. This sample is dominated by K-feldspar, which is weakly sericitised and intergrown with plagioclase in a perthitic texture. Minor biotite is light brown. The texture of the rock is granoblastic, however, there is a weak foliation defined by the alignment of recrystallised quartz grains and the minor biotite crystal aggregates. The rock is extensively recrystallised and variably sericite altered.","SAMPLING_FEATURE_NAME":"SE DD 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH575538","BOREHOLE_TOP_DEPTH_M":110.02,"BOREHOLE_BASE_DEPTH_M":110.45,"GEOLOGICAL_PROVINCE":"Christie Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.883988875,"LONG_GDA94":134.2852285773,"ELEV_M_AHD":179,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71358","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-11: Geochronology of granite and granite gneiss from Apollo Minerals tenements, Commonwealth Hill. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 141-167.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13484","geometry":{"type":"Point","coordinates":[137.73619699,-34.58258557]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13484,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169187","IGSN":"10273/AU2169187","SAMPLENO":2169187,"SAMPLE_ID":"R2017313","AGE_MA":1576,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6270","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":38349,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU38349","STRAT_UNIT_NAME":"Corny Point Paragneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Drillhole PYD001 lies in the central southern Yorke Peninsula and penetrated variably magnetite-sericite altered gneissic \"granite\" with local zones of magnetite-biotite-chlorite-sericite-pyrite-chalcopyrite alteration. The gneissic granite appears to have zones of partial melt, i.e. leucosome, which together with the biotite-rich melanosome defines a gneissic layering. This sample has been selected to determine the age of the protolith to see if it is part of the basement to the Wallaroo Group, i.e. Donington Suite, or whether it represents an apparently higher metamorphic grade equivalent of some portion of the Wallaroo Group. In thin section, the sample is a quartz-feldspar-muscovite-biotite gneiss. The sample preserves a granoblastic gneissic texture. The biotite-muscovite rich zones in the rock alternate with mica-poor zones and this alternation defines the gneissic foliation of the sample. Quartz is recrystallised and shows lobate grain boundaries in some instances. Plagioclase is variable altered by fine-grained sericite. K-feldspar is of lesser abundance than the plagioclase, and is intergrown in the granoblastic texture with the quartz and plagioclase. Muscovite occurs as laths to 1 mm in size, as does biotite. Biotite appears slightly more altered than the muscovite, with chlorite intergrown with some biotite crystals. There is magnetite within the rock present within the granoblastic texture suggesting it is part of the metamorphic mineral assemblage.","SAMPLING_FEATURE_NAME":"PYD001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH575535","BOREHOLE_TOP_DEPTH_M":98,"BOREHOLE_BASE_DEPTH_M":98.7,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.5825855725,"LONG_GDA94":137.7361969948,"ELEV_M_AHD":100,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71356","AGE_REF":"Jagodzinski, E.A., Reid, A., Galloway Warland, N., 2017. Project PGC03-08: Yorke Peninsula project of Phoenix Copper Ltd. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 98-118.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2022-11-24","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4203","geometry":{"type":"Point","coordinates":[135.12205693,-29.29871866]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4203,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2153443","IGSN":"10273/AU2153443","SAMPLENO":2153443,"SAMPLE_ID":"R1978580","AGE_MA":590,"AGE_MA_UNCERTAINTY":27,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.5,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6238","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample 1978580 is a foliated granite dyke, which occupies a unique structural position within the Northern Lode of the orebody. The granite dyke crosscuts the Northern Lode of the Cairn Hill orebody, yet the northern edge of the granite is wrapped into parallelism with the sheared host rocks. Therefore, this granite appears to have been emplaced after the formation of the orebody, yet during the deformation that led to the formation of the main structural geometry of the ore lodes; that is within a major fold structure, plunging ~50 to ~215. The sample is a foliated, medium to fine-grained microgranite. Sample 1978580 comprises quartz (30%), plagioclase (35%), alkali feldspar (25%), and minor biotite (10%). The sample is broadly monzogranitic in composition. The plagioclase is extensively replaced by fine sericite, while the K-feldspar occurs as medium grained crystals. Quartz shows recrystallised subgrains developed at the boundaries of the main crystals, indicative of dynamic recrystallisation. The alignment on the broadly elongate quartz and minor biotite defines a shape preferred foliation within the sample. Biotite is light brown to brown in transmitted light.","SAMPLING_FEATURE_NAME":"R1978580","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS569330","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Woods Domain","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.2987186599,"LONG_GDA94":135.1220569349,"ELEV_M_AHD":146,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Cairn Hill mine, Pit 1 floor, RL 57.47m.","SAMPLE_ACQUISITION_DATE":"2013-04-08","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71359","AGE_REF":"Reid, A., Jagodzinski, E.A., Hill, P., Maas, R., Jourdan, F., 2017. Project PGC03-12: Geochronology of the Cairn Hill deposit. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 168-194.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4187","geometry":{"type":"Point","coordinates":[134.28522858,-29.88398887]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4187,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169190","IGSN":"10273/AU2169190","SAMPLENO":2169190,"SAMPLE_ID":"R2018160","AGE_MA":2458,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":32,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6271","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The Sequoia Prospect is a magnetite iron ore prospect located in the central-eastern Christie Domain. Drilling by the South Australian Department of Mines and Energy in 1997 defined an inferred resource of 22 Mt grading 28.4% Fe, comprising several steeply dipping, laterally discontinuous 2–50 m wide layers of quartz-actinolite-magnetite, actinolite-magnetite, and biotite-quartz-magnetite gneiss (Davies, 2000). The magnetite gneiss is structurally concordant with a banded quartz-magnetite-diopside-hypersthene-amphibole gneiss with-interlayered quartz–microcline–plagioclase gneiss and plagioclase-rich granitoid. This sample is dominated by K-feldspar, which is weakly sericitised and intergrown with plagioclase in a perthitic texture. Minor biotite is light brown. The texture of the rock is granoblastic, however, there is a weak foliation defined by the alignment of recrystallised quartz grains and the minor biotite crystal aggregates. The rock is extensively recrystallised and variably sericite altered.","SAMPLING_FEATURE_NAME":"SE DD 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH575538","BOREHOLE_TOP_DEPTH_M":110.02,"BOREHOLE_BASE_DEPTH_M":110.45,"GEOLOGICAL_PROVINCE":"Christie Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.883988875,"LONG_GDA94":134.2852285773,"ELEV_M_AHD":179,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71358","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-11: Geochronology of granite and granite gneiss from Apollo Minerals tenements, Commonwealth Hill. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 141-167.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4016","geometry":{"type":"Point","coordinates":[136.00455611,-22.69503598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4016,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2180614","IGSN":"10273/AU2180614","SAMPLENO":2180614,"SAMPLE_ID":"HU14BLR672","AGE_MA":1718,"AGE_MA_UNCERTAINTY":53,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.7,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6293","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28387,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28387","STRAT_UNIT_NAME":"Bonya Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU14BLR672 is an andalusite-K-feldspar schist from the Bonya Metamorphics in the Bonya Hills. Andalusite, K-feldspar and sericite-after-cordierite pseudomorphs form cm-scale porphyroblasts with sub-mm inclusions of quartz and biotite. The matrix comprises 1-3 mm biotite intergrown with sillimanite and minor muscovite. Monazite (50-100 micron) occurs both as inclusions in andalusite and in the biotite-sillimanite matrix. Fine (10-20 micron) subrounded and elongate zircons occur throughout the rock, both in the biotite matrix and as inclusions in the andalusite and K-feldspar porphyroblasts.","SAMPLING_FEATURE_NAME":"HU14BLR672","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578733","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6950359822,"LONG_GDA94":136.0045561142,"ELEV_M_AHD":417,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-09-02","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70303","AGE_REF":"Kositcin, N., Reno, B.L., Whelan, J.A., 2015. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2014-June 2015. Northern Territory Geological Survey Record, 2015-007, 26p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82476","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4017","geometry":{"type":"Point","coordinates":[136.00455611,-22.69503598]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4017,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2180614","IGSN":"10273/AU2180614","SAMPLENO":2180614,"SAMPLE_ID":"HU14BLR672","AGE_MA":498,"AGE_MA_UNCERTAINTY":24,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.7,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6293","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28387,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28387","STRAT_UNIT_NAME":"Bonya Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU14BLR672 is an andalusite-K-feldspar schist from the Bonya Metamorphics in the Bonya Hills. Andalusite, K-feldspar and sericite-after-cordierite pseudomorphs form cm-scale porphyroblasts with sub-mm inclusions of quartz and biotite. The matrix comprises 1-3 mm biotite intergrown with sillimanite and minor muscovite. Monazite (50-100 micron) occurs both as inclusions in andalusite and in the biotite-sillimanite matrix. Fine (10-20 micron) subrounded and elongate zircons occur throughout the rock, both in the biotite matrix and as inclusions in the andalusite and K-feldspar porphyroblasts.","SAMPLING_FEATURE_NAME":"HU14BLR672","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578733","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6950359822,"LONG_GDA94":136.0045561142,"ELEV_M_AHD":417,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-09-02","SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70303","AGE_REF":"Kositcin, N., Reno, B.L., Whelan, J.A., 2015. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2014-June 2015. Northern Territory Geological Survey Record, 2015-007, 26p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82476","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3996","geometry":{"type":"Point","coordinates":[129.1571699,-23.02548871]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3996,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2165622","IGSN":"10273/AU2165622","SAMPLENO":2165622,"SAMPLE_ID":"LM01CJE006","AGE_MA":1578.3,"AGE_MA_UNCERTAINTY":4.8,"AGE_CONFIDENCE_LEVEL":"asymmetric 95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"median","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6258","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":72411,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU72411","STRAT_UNIT_NAME":"Rapide Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of the Rapide Granite (NTGS LM01CJE006) was collected approximately 12 km NNE of Lake Rapide in LAKE MACKAY near the NT-WA border. The sampled unit is a medium to coarse-grained, weakly porphyritic biotite granite, comprising biotite commonly partially replaced by chlorite and epidote, quartz, K-feldspar, plagioclase and accessory zircon. At other locations the Rapide Granite is locally garnet-bearing. Previous SHRIMP U-Pb zircon dating of the Rapide Granite (Kinny 2002) was inconclusive yielding an interpreted magmatic zircon population with ages in the range 1760-1590 Ma. Based on this age data the Rapide Granite was tentatively interpreted as a 1760 Ma granite, which had undergone isotopically disturbance at 1590 Ma.","SAMPLING_FEATURE_NAME":"LM01CJE006","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS572220","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.0254887067,"LONG_GDA94":129.157169904,"ELEV_M_AHD":415,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69794","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., 2014. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2013-June 2014. Northern Territory Geological Survey Record, 2014-008, 30p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82469","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14856","geometry":{"type":"Point","coordinates":[139.39,-30.32]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14856,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2168494","IGSN":"10273/AU2168494","SAMPLENO":2168494,"SAMPLE_ID":"ARK445","AGE_MA":440,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":3.2,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave LUV213 laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Nu Plasma HR","LABORATORY_NAME":"University of Oslo","AGE_INTERPRETED_FROM_SOURCE":"Interpreted as the age of hydrothermal alteration and metasomatism of the mafic dyke","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Concordia age calculated from most concordant 6 of 13 analyses obtained.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed metasedimentary rocks","UNIT_NAME_SOURCE":"dyke within Radium Creek Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"basic intrusive rock","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2013): Hyperaluminous spinel-bearing rock interpreted to represent a highly metasomatised Mesoproterozoic mafic dyke.","SAMPLING_FEATURE_NAME":"ARK445","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS574871","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Painter Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.32,"LONG_GDA94":139.39,"ELEV_M_AHD":327,"ACCURACY_M":50000,"LOCATION_METHOD":"other method","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75089","AGE_REF":"Elburg, M.A., Andersen, T., Bons, P.D., Simonsen, S.L., Weisheit, A., 2013. New constraints on Phanerozoic magmatic and hydrothermal events in the Mt Painter Province, South Australia. Gondwana Research, 24(2), 700-712.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gr.2012.12.017","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15257","geometry":{"type":"Point","coordinates":[132.56952,-29.30901]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15257,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2168871","IGSN":"10273/AU2168871","SAMPLENO":2168871,"SAMPLE_ID":"R1643452","AGE_MA":1715,"AGE_MA_UNCERTAINTY":17,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.04,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":28826,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28826","STRAT_UNIT_NAME":"Mulgathing Complex","INFORMAL_UNIT_NAME":"unnamed gneiss","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"quarter core","SAMPLE_DESC":"(plg-gt-opx-qtz-hbl-bi-mag gneiss) Howard et al 2011 (AJES): plagioclase-garnet-orthopyroxene-quartz-hornblende-biotite-magnetite gneiss. The foliation is defined by strings of garnet that contain inclusions of magnetite and quartz.","SAMPLING_FEATURE_NAME":"OBD 01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH621000","BOREHOLE_TOP_DEPTH_M":139.2,"BOREHOLE_BASE_DEPTH_M":139.8,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.30901,"LONG_GDA94":132.56952,"ELEV_M_AHD":235,"ACCURACY_M":200,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67181","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Cutts, K.A., Belousova, E.A., 2011. U-Pb zircon, zircon Hf and whole-rock Sm-Nd isotopic constraints on the evolution of Paleoproterozoic rocks in the northern Gawler Craton. Australian Journal of Earth Sciences, 58(6), 615-638.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2011.594905","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3836","geometry":{"type":"Point","coordinates":[136.40929531,-34.03231865]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3836,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124684","IGSN":"10273/AU2124684","SAMPLENO":2124684,"SAMPLE_ID":"R1838846","AGE_MA":1731,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":18,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The series of coastal outcrops to the east of Bratten Cairn are an excellent exposure of strongly deformed metasedimentary and meta-igneous lithologies. Two main lithological associations are found along the northern and central Bratten Cairn outcrops: a metasedimentary sequence that includes metapsammite, garnet-orthopyroxene-bearing granulites, garnet-magnetite bearing metaironstones and calc silicate rocks. There is also a series of grey gneisses that are similar in appearance to the charnockites at Cape Carnot and Redbanks. The present sample is a migmatitic garnet-bearing quartzo-feldspathic gneiss, interpreted in the field to have a metasedimentary origin, since the compositional banding within the rock is parallel to the compositional banding observed within the rock types such as the meta-iron stone rocks, which can be more confidently interpreted as metasedimentary in origin. The geochronology, however, suggests this may be a meta-igneous rock. If this is the case, then since the gneissic layering within this sample parallels that of the surrounding metasedimentary gneisses any contact relationship between the possible intrusive must have been transposed during deformation. In thin section, Sample R1838846 is a quartzo-feldspathic gneiss with minor garnet. The sample is composed of dynamically recrystallised quartz, typically as equant subgrains. Plagioclase is the dominant feldspar and occurs intergrown with quartz within the overall granoblastic texture. The sample has a preferred orientation defined by biotite and elongate nature of the quartz-feldspar crystals. Biotite occurs throughout the rock as light brown crystals. Garnet is also present in the rock in minor amounts (<5%) and occurs as subhedral crystals lacking in inclusions.","SAMPLING_FEATURE_NAME":"R1838846","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547687","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.0323186463,"LONG_GDA94":136.4092953125,"ELEV_M_AHD":7,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.938","geometry":{"type":"Point","coordinates":[133.84261525,-26.17809166]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":938,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2128554","IGSN":"10273/AU2128554","SAMPLENO":2128554,"SAMPLE_ID":"R1842265","AGE_MA":1168,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4905","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Birksgate Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample occurs in close proximity to other potentially metasedimentary rocks (represented by SampleIDs R1842269 and R1039159). The sample is a finely layered tight to isoclinally folded quartzofeldspathic migmatitic gneiss with minor compositional variation from garnet absent, to garnet present, going west to east across the outcrop. This sample is also adjacent to a 4m wide microgranite dyke which crosscuts the foliation and was also sampled (SampleID R1842263) for geochronology. It is a medium-grained crystalline rock in which banding on the centimetre scale is well-defined by bands rich in dark ferromagnesian grains (biotite) and bands rich in felsic grains (white feldspar, translucent grey quartz). Preferred orientation of the biotite flakes defines foliation subparallel to mineralogical banding. This sample is considered to have formed as a layered sediment, in which layering was defined by varied abundances of clastic grains (plagioclase, quartz, K-feldspar, trace zircon), detrital clays, and calc-silicate chemical sedimentary components. The inferred presence of calc-silicate chemical sedimentary components implies a marine environment of deposition. Recrystallisation in response to regional metamorphism in the amphibolite facies generated new granoblastic assemblages of plagioclase, quartz, K-feldspar, biotite, hornblende, clinopyroxene (diopside), minor opaques and trace apatite. Particular sedimentary protoliths produced different mineral assemblages: i) Mixed clastic-pelitic-calc-silicate layers produced plagioclase + quartz + biotite + minor hornblende + clinopyroxene + opaques (including magnetite) + apatite. These are the darker band and paler grey band in the hand sample. ii) Some felsic clastic layers produced K-feldspar + quartz + plagioclase + minor biotite. This the pale cream band in the hand sample.","SAMPLING_FEATURE_NAME":"R1842265","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS551698","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.1780916557,"LONG_GDA94":133.8426152476,"ELEV_M_AHD":411,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Primary Industries and Resources South Australia (PIRSA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-25","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7332","geometry":{"type":"Point","coordinates":[115.88245,-33.2371]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7332,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2129766","IGSN":"10273/AU2129766","SAMPLENO":2129766,"SAMPLE_ID":"198532","AGE_MA":707,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.81,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"679 +/- 8 Ma (1 sigma, single analysis)","AGE_REMARK_FROM_SOURCE":"The date of 679 +/- 8 Ma (1 sigma) for the single analysis of a zircon rim is interpreted to reflect either loss of radiogenic Pb, or the age of a younger metamorphic event.","AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"pelitic gneiss, Brunswick River","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"pelitic gneiss","SAMPLING_FEATURE_NAME":"198532","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS557882","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Yilgarn Craton","GEOLOGICAL_REGION_NAME":"Yilgarn Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-33.2371,"LONG_GDA94":115.88245,"ELEV_M_AHD":70,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2012-03-22","SAMPLE_ORIGINATOR":"Wyche, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Wingate, MTD, Kirkland, CL, Goscombe, B and Wyche, S 2014, 198532: pelitic gneiss, Brunswick River; Geochronology Record 1214: Geological Survey of Western Australia, 7p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/198532.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3844","geometry":{"type":"Point","coordinates":[135.61968362,-34.94405247]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3844,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124689","IGSN":"10273/AU2124689","SAMPLENO":2124689,"SAMPLE_ID":"R1809050","AGE_MA":1715,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.86,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28206,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28206","STRAT_UNIT_NAME":"Carnot Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"In addition to metasedimentary lithologies, the outcrop at Cape Carnot also includes a distinctive K-feldspar megacrystic granite gneiss. This granite gneiss is variably deformed and in places is reworked into anastomosing high strain zones in which the feldspar are strung out into a high temperature mylonitic foliation. The migmatitic textures within the K-spar megacrystic granite at Cape Carnot are spectacular examples of net-textured migmatites, with leucosomes containing abundant garnet +/- cordierite forming within low strain zones such as within foliation boudinage necks. The K-feldspar megacrystic granite gneiss also contains garnet in places, indicating this granite is S-type affinity. In thin section, sample R1809050 is a garnet-bearing gneiss. The sample has a granoblastic texture with coarse quartz and K-feldspar making up the bulk of the rock, with biotite also abundant and occurring with long axes typically aligned parallel to the gneissic banding within the rock. Garnets occur as subhedral to anhedral crystals. Very few inclusions are present within these garnets, excepting minor quartz and biotite.","SAMPLING_FEATURE_NAME":"R1809050","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547722","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9440524668,"LONG_GDA94":135.6196836184,"ELEV_M_AHD":8,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14830","geometry":{"type":"Point","coordinates":[139.12870787,-34.83480713]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14830,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2133228","IGSN":"10273/AU2133228","SAMPLENO":2133228,"SAMPLE_ID":"R1300534","AGE_MA":509.67,"AGE_MA_UNCERTAINTY":0.72,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.1,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: chemical abrasion and isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: GV Isoprobe-T","LABORATORY_NAME":"Boise State University","AGE_INTERPRETED_FROM_SOURCE":"Interpreted to record emplacement of the contemporaneous Black Hill Norite.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Quoted uncertainty includes that of the EARTHTIME U/Pb tracer.","AGE_SOURCE":"Unpublished GSSA compilation","PROJECT":null,"STRATNO":15851,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU15851","STRAT_UNIT_NAME":"Rathjen Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Rathjen Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Grey orthogneiss.","SAMPLING_FEATURE_NAME":"R1300534","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS560243","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":"Kanmantoo Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.8348071277,"LONG_GDA94":139.1287078658,"ELEV_M_AHD":null,"ACCURACY_M":200,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Collected near main road.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75784","AGE_REF":"Curtis, S., Payne, J., Crowley, J., Jagodzinski, L., Preiss, W., Pawley, M., Wise, T., Morrissey, L., McGee, L., 2022, Back-arc extension and inversion during the Delamerian Orogeny. IN: Folkes C.B. (compiler) Uncover Curnamona 2022: Symposium Presentations. Geological Survey of New South Wales Report GS, 2021/1733.","AGE_PUBLICATION_LINKS":"https://search.geoscience.nsw.gov.au/report/R00034736","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3837","geometry":{"type":"Point","coordinates":[136.40929531,-34.03231865]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3837,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124684","IGSN":"10273/AU2124684","SAMPLENO":2124684,"SAMPLE_ID":"R1838846","AGE_MA":697,"AGE_MA_UNCERTAINTY":68,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.94,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The series of coastal outcrops to the east of Bratten Cairn are an excellent exposure of strongly deformed metasedimentary and meta-igneous lithologies. Two main lithological associations are found along the northern and central Bratten Cairn outcrops: a metasedimentary sequence that includes metapsammite, garnet-orthopyroxene-bearing granulites, garnet-magnetite bearing metaironstones and calc silicate rocks. There is also a series of grey gneisses that are similar in appearance to the charnockites at Cape Carnot and Redbanks. The present sample is a migmatitic garnet-bearing quartzo-feldspathic gneiss, interpreted in the field to have a metasedimentary origin, since the compositional banding within the rock is parallel to the compositional banding observed within the rock types such as the meta-iron stone rocks, which can be more confidently interpreted as metasedimentary in origin. The geochronology, however, suggests this may be a meta-igneous rock. If this is the case, then since the gneissic layering within this sample parallels that of the surrounding metasedimentary gneisses any contact relationship between the possible intrusive must have been transposed during deformation. In thin section, Sample R1838846 is a quartzo-feldspathic gneiss with minor garnet. The sample is composed of dynamically recrystallised quartz, typically as equant subgrains. Plagioclase is the dominant feldspar and occurs intergrown with quartz within the overall granoblastic texture. The sample has a preferred orientation defined by biotite and elongate nature of the quartz-feldspar crystals. Biotite occurs throughout the rock as light brown crystals. Garnet is also present in the rock in minor amounts (<5%) and occurs as subhedral crystals lacking in inclusions.","SAMPLING_FEATURE_NAME":"R1838846","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547687","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.0323186463,"LONG_GDA94":136.4092953125,"ELEV_M_AHD":7,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3878","geometry":{"type":"Point","coordinates":[136.40677186,-34.03430442]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3878,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124685","IGSN":"10273/AU2124685","SAMPLENO":2124685,"SAMPLE_ID":"R1838862","AGE_MA":1731,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.13,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The metasedimentary rocks at Bratten Cairn are interleaved with a series of grey gneisses, mafic gneisses and K-feldspar rich granite gneiss. This sample of mafic gneiss was selected to test whether it intrudes, or is basement to, the metasedimentary rocks. The sample is a granoblastic textured two-pyroxene gneiss. Orthopyroxene occurs as euhedral crystals intergrown with plagioclase, quartz and clinopyroxene. There is also minor biotite within the rock that occurs parallel to the gneissic banding. The quartz shows lobate grain boundaries and subgrain development. The sample is a metanorite.","SAMPLING_FEATURE_NAME":"R1838862","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547716","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.0343044202,"LONG_GDA94":136.4067718616,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3846","geometry":{"type":"Point","coordinates":[136.3495815,-34.10273295]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3846,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124690","IGSN":"10273/AU2124690","SAMPLENO":2124690,"SAMPLE_ID":"R1809039","AGE_MA":1720,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.82,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6176","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Kalinjala Shear Zone is the type structure for the Kimban Orogeny and its structural aspects have been studied in some detail (Parker, 1980; Parker, 1993; Vassallo and Wilson, 2002). The Kalinjala Shear Zone is a crustal scale structure imaged in magnetotelluric studies to define a steep boundary between the Donington Suite on the east and the Sleaford Complex in the west (Theil et al., 2005). Despite its significance there is no geochronology available from the type locality of this structure, meaning it has not been placed into a temporal framework for the evolution of the Kimban Orogeny. For example, does the Kalinajala Shear Zone represent an early structure active at c. 1730 Ma during emplacement of many granites and mafic rocks across the Gawler Craton, or is it more akin to the c. 1715 Ma migmatites developed in the Donington Suite to the southeast of Port Lincoln (Jagodzinski et al., 2006; Reid et al., 2007)? Sample R1809039 is a syn-kinematic melt formed at or near peak metamorphic conditions within the shear zone. The sample is a garnet-bearing leucosome formed within an amphibolite layer analysed for the purposes of defining the peak of the metamorphic cycle within the Kalinjala Shear Zone. In thin section, the rock comprises two domains, representing a garnetiferous leucosome within a mafic gneiss. The leuocosome is composed of plagioclase + quartz with large garnet crystals, that are subhedral in morphology. Within the leucosome are zones of intense sericite alteration, possibly as a result of late stage fluids within the rock. Biotite also is present within the leucosome. The amphibolite portion of the sample is dominated by coarse-grained hornblende crystals that are intergrown with plagioclase. Hornblende contains quartz and/or plagioclase inclusions. There is minor biotite occurring interstitially.","SAMPLING_FEATURE_NAME":"R1809039","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547731","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.1027329478,"LONG_GDA94":136.3495815028,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1564","geometry":{"type":"Point","coordinates":[136.04985783,-22.72374018]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1564,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2165623","IGSN":"10273/AU2165623","SAMPLENO":2165623,"SAMPLE_ID":"HU13JAW207","AGE_MA":1739.1,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6266","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":76872,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU76872","STRAT_UNIT_NAME":"Bruna Granitic Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Garnet-Biotite Schist","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of unnamed porphyroblastic garnet-biotite schist (NTGS HU13JAW207) was collected approximately 1.6 km west-southwest of the abandoned Bonya Cu mine in HUCKITTA. The sampled unit is a medium-grained, porphyroblastic garnet-biotite schist which is locally sillimanite-bearing. The sampled lithology comprises up to 2 cm glassy, fractured garnet porphyroblasts enveloped in a biotite-feldspar-quartz matrix alternating with fine-grained psammitic layers. This compositional layering is tentatively interpreted to represent relict primary sedimentary bedding. The schistosity steeply dips to the north and is defined by biotite-quartz aggregates. A relict grain-shape foliation is variably preserved, defined by elongate feldspar and quartz, and is parallel to the schistose fabric. The sample was collected from an area previously mapped as Bonya Schist. SHRIMP U-Pb zircon dating of a possible volcaniclastic rock from the Bonya Schist yielded a maximum depositional age of 1807 +/- 17 Ma (Claoué-Long and Hoatson 2005). In the vicinity of the sample location the garnet-biotite schist is intruded by coarse-grained tourmaline-muscovite pegmatite dykes and what appear to be small plug-like intrusions of weakly foliated, porphyritic, Kings Legend Amphibolite.","SAMPLING_FEATURE_NAME":"HU13JAW207","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS572221","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7237401818,"LONG_GDA94":136.0498578326,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69794","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., 2014. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2013-June 2014. Northern Territory Geological Survey Record, 2014-008, 30p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82469","AGE_ENTRY_DATE":"2014-12-17","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15268","geometry":{"type":"Point","coordinates":[136.07175586,-27.61940387]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15268,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2134858","IGSN":"10273/AU2134858","SAMPLENO":2134858,"SAMPLE_ID":"R1951817","AGE_MA":1753,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.57,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"AR-40","ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"leucocratic garnetiferous gneiss","UNIT_NAME_SOURCE":"garnet-bearing leucocratic gneiss, DDH TB02","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"(para gneiss) Jagodzinski & Reid 2015 (RB 2015/00003): Sample 1951817 is representative of the leucocratic garnetiferous gneiss that forms the predominant host rock within the drillhole. Hand specimen: Two offcuts with the same sample number were provided for sectioning and are different. Offcut ‘A’ is richer in feldspar and may be more psammitic, whereas offcut ‘B’ seems to be richer in biotite and may represent metamorphosed fine-grained sediment. The thin section from offcut ‘A’ is described as a weakly metamorphic layered and heterogeneous gneiss with a zone of coarse grained quartz-plagioclase-garnet, including biotite and accessory apatite. Other areas of coarse plagioclase and K-spar (partly altered), and also fine-grained feldspar-sericite-quartz-myrmekite aggregates, brown primary biotite and garnet porphyroblasts micro-veined by brown and green biotite. Accessory monazite +/- zircon. Unidentified small crystals with pleochroic haloes possibly baddeleyite.. Monazite within this sample was prepared as a standard grain mount for analysis. The analysis was aimed at providing further constraints on the timing of metamorphism within this sample.","SAMPLING_FEATURE_NAME":"TB02","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH560644","BOREHOLE_TOP_DEPTH_M":486.2,"BOREHOLE_BASE_DEPTH_M":488.35,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-27.6194038655,"LONG_GDA94":136.0717558634,"ELEV_M_AHD":67,"ACCURACY_M":250,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71348; 71352","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-02: Geochronology of drillhole TB02, Toby and Frew Creek IOCG-U exploration project of Metallica Minerals Ltd. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 29-68.; Reid, A.J., Jagodzinski, E.A., Wade, C.E., Payne, J.L., Jourdan, F., 2017. Recognition of c. 1780 Ma magmatism and metamorphism in the buried northeastern Gawler Craton: Correlations with events of the Aileron Province. Precambrian Research, 302, 198-220.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2017.09.010; https://pid.sarig.sa.gov.au/document/d20011024","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1049","geometry":{"type":"Point","coordinates":[148.90890278,-27.54037778]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1049,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2152163","IGSN":"10273/AU2152163","SAMPLENO":2152163,"SAMPLE_ID":"TH291","AGE_MA":360,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.27,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6237","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Gp1 360 metm n=5","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":18177,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU18177","STRAT_UNIT_NAME":"Timbury Hills Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Timbury Hills Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"HPP BENDIBOI 1 was drilled to a depth of 1668.5 m by Hematite Petroleum Pty Ltd in 1979. It is located in the southern part of the Roma Shelf approximately 5 km south-east of the junction of Noona and Bendiboi Creeks and about 75 km north-east of St George, Queensland. Murray (1994) described basement core between 1656.59-1661.86 m as coarse-grained garnet-muscovite-biotite schist or gneiss, which he considered a high grade (probable amphibolite facies) part of the Timbury Hills Formation, a unit typified by lower greenschist facies metamorphism in the northern part of the Roma Shelf. The age of the Timbury Hills Formation is loosely constrained by plant fossils from drill hole AAO PICKANJINNIE 2 (which indicate a Devonian age) and intrusions of Devonian to Carboniferous granites that provide a minimum age (Murray 1994). Additionally, a SHRIMP U-Pb detrital zircon maximum deposition age of 419.8 +/- 4.1 Ma was interpreted for a sandstone from the Timbury Hills Formation, recovered from drill hole AAO TIMBURY HILLS 2 (2130082/TH679; Kositcin et al. 2015a). The sample submitted for geochronology is a garnet-muscovite-biotite paragneiss and comprised 59.33 cm of half core. It was analysed to determine the age of metamorphism and the maximum deposition age of the protolith.","SAMPLING_FEATURE_NAME":"BENDIBOI 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH9012","BOREHOLE_TOP_DEPTH_M":1659.33,"BOREHOLE_BASE_DEPTH_M":1660,"GEOLOGICAL_PROVINCE":"Roma Shelf","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-27.54037778,"LONG_GDA94":148.90890278,"ELEV_M_AHD":235,"ACCURACY_M":0,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Purdy, D.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70673","AGE_REF":"Cross, A.J., Purdy, D.J., Bultitude, R.J., Brown, D.D., Carr, P.A., 2016. Summary of results - Joint GSQ-GA geochronology project: Thomson Orogen, New England Orogen, Mossman Orogen and Mount Isa region, 2011-2013. Queensland Geological Record, 2016/03, 142p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr096974","AGE_ENTRY_DATE":"2016-02-24","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3847","geometry":{"type":"Point","coordinates":[136.3495815,-34.10273295]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3847,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124690","IGSN":"10273/AU2124690","SAMPLENO":2124690,"SAMPLE_ID":"R1809039","AGE_MA":1736,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.95,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6176","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Kalinjala Shear Zone is the type structure for the Kimban Orogeny and its structural aspects have been studied in some detail (Parker, 1980; Parker, 1993; Vassallo and Wilson, 2002). The Kalinjala Shear Zone is a crustal scale structure imaged in magnetotelluric studies to define a steep boundary between the Donington Suite on the east and the Sleaford Complex in the west (Theil et al., 2005). Despite its significance there is no geochronology available from the type locality of this structure, meaning it has not been placed into a temporal framework for the evolution of the Kimban Orogeny. For example, does the Kalinajala Shear Zone represent an early structure active at c. 1730 Ma during emplacement of many granites and mafic rocks across the Gawler Craton, or is it more akin to the c. 1715 Ma migmatites developed in the Donington Suite to the southeast of Port Lincoln (Jagodzinski et al., 2006; Reid et al., 2007)? Sample R1809039 is a syn-kinematic melt formed at or near peak metamorphic conditions within the shear zone. The sample is a garnet-bearing leucosome formed within an amphibolite layer analysed for the purposes of defining the peak of the metamorphic cycle within the Kalinjala Shear Zone. In thin section, the rock comprises two domains, representing a garnetiferous leucosome within a mafic gneiss. The leuocosome is composed of plagioclase + quartz with large garnet crystals, that are subhedral in morphology. Within the leucosome are zones of intense sericite alteration, possibly as a result of late stage fluids within the rock. Biotite also is present within the leucosome. The amphibolite portion of the sample is dominated by coarse-grained hornblende crystals that are intergrown with plagioclase. Hornblende contains quartz and/or plagioclase inclusions. There is minor biotite occurring interstitially.","SAMPLING_FEATURE_NAME":"R1809039","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547731","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.1027329478,"LONG_GDA94":136.3495815028,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.946","geometry":{"type":"Point","coordinates":[133.82967767,-26.17906142]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":946,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2128558","IGSN":"10273/AU2128558","SAMPLENO":2128558,"SAMPLE_ID":"R1842269","AGE_MA":1154,"AGE_MA_UNCERTAINTY":19,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"Z4906","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism. Age range 1173-1140 Ma; session-specific calibration uncertainties from all 4 batches involved, and incorporated in quadrature in the age uncertainty.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Birksgate Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was selected for geochronology based on field relationships and petrographic interpretation that suggested this was a comparatively rare layered meta-sediment or volcaniclastic unit of the Birksgate complex within the Tieyon 100k mapsheet. It is a mesocratic crystalline rock composed of subequal abundances of grey felsic grains (feldspar, quartz) and ferromagnesian grains (hornblende, biotite). Antipathetic abundances of felsic and ferromagnesian grains defines indistinct mineralogical banding, and preferred orientation of ferromagnesian grains defines a foliation subparallel to the banding. The sample responds weakly to the hand magnet, suggesting minor magnetite is present. This sample is considered to have initially formed as a sedimentary deposit composed of mixed sedimentary components including clastic grains (plagioclase >> zircon), detrital clays, and calc-silicate chemical sedimentary components. Slight variations in the components may have been responsible for primary layering in the sediment. Recrystallisation occurred in response to regional metamorphism in the amphibolite facies, producing the granoblastic assemblage of plagioclase + quartz + hornblende + biotite + diopside + opaques (including magnetite) + apatite. Weak mineralogical banding may reflect primary sedimentary layering. A directed stress regime during this event produced preferred orientation of biotite and hornblende grains which defines a foliation subparallel to mineralogical banding. The relatively high abundance of quartz for the mesocratic nature of this metamorphic rock discounts an intermediate or basic igneous protolith, and provides mineralogical support for a sedimentary protolith.","SAMPLING_FEATURE_NAME":"R1842269","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS551702","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Eromanga Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.1790614192,"LONG_GDA94":133.8296776711,"ELEV_M_AHD":415,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Primary Industries and Resources South Australia (PIRSA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-25","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1697","geometry":{"type":"Point","coordinates":[135.24556691,-23.6079974]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1697,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2134817","IGSN":"10273/AU2134817","SAMPLENO":2134817,"SAMPLE_ID":"IC12JAW1819","AGE_MA":1150,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not reported","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not reported","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP IIe","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"hydrothermal","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"NTGS STRIKE","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of strongly-foliated to mylonitic, hematite-bearing quartzite was collected from north central Limbla for U-Pb SHRIMP geochronology. At this location the Bitter Springs Formation and Heavitree Quartzite are structurally repeated in a series of thrust slices. North and South of the sample location, granulite-facies metasedimentary rocks of the Bluebush Metamorphics and intrusive rocks of the Atneequa Suite (Whelan et al 2011) unconformably underlie the quartzite. In Limbla, along the northeastern margin of the Amadeus Basin, the basal Neoproterozoic units, the Heavitree Quartzite and the Bitter Springs Formation, are structurally interleaved with the Palaeoproterozoic Aileron Province. No sedimentary structures were observed in outcrop at and along strike of the sample location. Given its location along strike from known exposures of Heavitree Quartzite, this sample was collected in order to try and constrain the nature of the protolith (deformed quartz vein or deformed Heavitree Quartzite?). At this location the quartzite contains abundant hematite, secondary copper minerals and box work after sulfide.","SAMPLING_FEATURE_NAME":"IC12JAW1819","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS560622","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Amadeus Basin","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.6079973989,"LONG_GDA94":135.2455669069,"ELEV_M_AHD":446,"ACCURACY_M":5,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69510","AGE_REF":"Kositcin, N., Whelan, J.A., Hallett, L., Beyer, E.E., 2014. Summary of results. Joint NTGS-GA geochronology project: Amadeus Basin, Arunta Region and Murphy Province July 2012-June 2013. Northern Territory Geological Survey Record, 2014-005, 24p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82466","AGE_ENTRY_DATE":"2019-08-08","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4196","geometry":{"type":"Point","coordinates":[136.07175586,-27.61940387]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4196,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2134858","IGSN":"10273/AU2134858","SAMPLENO":2134858,"SAMPLE_ID":"R1951817","AGE_MA":1783,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.38,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6228","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"leucocratic garnetiferous gneiss","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"(para gneiss) Jagodzinski & Reid 2015 (RB 2015/00003): Sample 1951817 is representative of the leucocratic garnetiferous gneiss that forms the predominant host rock within the drillhole. Hand specimen: Two offcuts with the same sample number were provided for sectioning and are different. Offcut ‘A’ is richer in feldspar and may be more psammitic, whereas offcut ‘B’ seems to be richer in biotite and may represent metamorphosed fine-grained sediment. The thin section from offcut ‘A’ is described as a weakly metamorphic layered and heterogeneous gneiss with a zone of coarse grained quartz-plagioclase-garnet, including biotite and accessory apatite. Other areas of coarse plagioclase and K-spar (partly altered), and also fine-grained feldspar-sericite-quartz-myrmekite aggregates, brown primary biotite and garnet porphyroblasts micro-veined by brown and green biotite. Accessory monazite +/- zircon. Unidentified small crystals with pleochroic haloes possibly baddeleyite.. Monazite within this sample was prepared as a standard grain mount for analysis. The analysis was aimed at providing further constraints on the timing of metamorphism within this sample.","SAMPLING_FEATURE_NAME":"TB02","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH560644","BOREHOLE_TOP_DEPTH_M":486.2,"BOREHOLE_BASE_DEPTH_M":488.35,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-27.6194038655,"LONG_GDA94":136.0717558634,"ELEV_M_AHD":67,"ACCURACY_M":250,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71352; 71348","AGE_REF":"Reid, A., Jagodzinski, E.A., 2017. Project PGC03-02: Geochronology of drillhole TB02, Toby and Frew Creek IOCG-U exploration project of Metallica Minerals Ltd. IN Jagodzinski, E.A. and Reid, A.J. (eds) PACE Geochronology: Results of collaborative geochronology projects 2013-15. Geological Survey of South Australia. Report Book, 2015/00003, 29-68.; Reid, A.J., Jagodzinski, E.A., Wade, C.E., Payne, J.L., Jourdan, F., 2017. Recognition of c. 1780 Ma magmatism and metamorphism in the buried northeastern Gawler Craton: Correlations with events of the Aileron Province. Precambrian Research, 302, 198-220.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011024; https://doi.org/10.1016/j.precamres.2017.09.010","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3839","geometry":{"type":"Point","coordinates":[135.61773026,-34.92160017]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3839,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124687","IGSN":"10273/AU2124687","SAMPLENO":2124687,"SAMPLE_ID":"R1838836","AGE_MA":2465,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"mixture-modelled component","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28206,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28206","STRAT_UNIT_NAME":"Carnot Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample is a garnetiferous gneiss sampled from a significant set of outcrops on the southern coast of Eyre Peninsula, a locality known as Redbanks. At Redbanks two main rock types are observed: garnetiferous gneiss and gneissic charnockite. The contact between the two gneissic phases is not clearly intrusive and appears to parallel the gneissic layering. The charnockite contains rafts of variably disaggregated mafic dykes that make up between 5% and 8% of the rock mass. The garnetiferous metasediment is compositionally layered, with some biotite-rich, some cordierite-rich and some garnet-rich zones likely reflecting original differences in bulk composition within a sedimentary pile. This metasedimentary gneiss is part of the Carnot Gneiss. Mafic gneiss is not common within the metasedimentary gneiss, except near the contact with the charnockite. Therefore it is possible that the charnockite intrudes the metasedimentary sequence, although this is by no means certain from the field relationships. The aim of this sample is to investigate the age and provenance of the Carnot Gneiss at this location, and to investigate the timing of metamorphism. In thin section, this sample is a garnet-bearing quartzo-feldspathic gneiss. Compositional layering at the thin section scale has leucocratic, quartz-plagioclase rich domains juxtaposed against garnet-biotite rich domains, reflecting the gneissic compositional banding. Garnet is irregularly shaped and poikiloblastic with inclusions of spinel, biotite and quartz. The matrix is composed of biotite, which is aligned to form the gneissic layering, together with medium-grained dynamically recrystallised quartz, with lesser plagioclase. Cordierite also occurs within the matrix, in some instances with spinel inclusions.","SAMPLING_FEATURE_NAME":"R1838836","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547718","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9216001728,"LONG_GDA94":135.6177302575,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3840","geometry":{"type":"Point","coordinates":[135.61773026,-34.92160017]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3840,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124687","IGSN":"10273/AU2124687","SAMPLENO":2124687,"SAMPLE_ID":"R1838836","AGE_MA":1726,"AGE_MA_UNCERTAINTY":24,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28206,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28206","STRAT_UNIT_NAME":"Carnot Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample is a garnetiferous gneiss sampled from a significant set of outcrops on the southern coast of Eyre Peninsula, a locality known as Redbanks. At Redbanks two main rock types are observed: garnetiferous gneiss and gneissic charnockite. The contact between the two gneissic phases is not clearly intrusive and appears to parallel the gneissic layering. The charnockite contains rafts of variably disaggregated mafic dykes that make up between 5% and 8% of the rock mass. The garnetiferous metasediment is compositionally layered, with some biotite-rich, some cordierite-rich and some garnet-rich zones likely reflecting original differences in bulk composition within a sedimentary pile. This metasedimentary gneiss is part of the Carnot Gneiss. Mafic gneiss is not common within the metasedimentary gneiss, except near the contact with the charnockite. Therefore it is possible that the charnockite intrudes the metasedimentary sequence, although this is by no means certain from the field relationships. The aim of this sample is to investigate the age and provenance of the Carnot Gneiss at this location, and to investigate the timing of metamorphism. In thin section, this sample is a garnet-bearing quartzo-feldspathic gneiss. Compositional layering at the thin section scale has leucocratic, quartz-plagioclase rich domains juxtaposed against garnet-biotite rich domains, reflecting the gneissic compositional banding. Garnet is irregularly shaped and poikiloblastic with inclusions of spinel, biotite and quartz. The matrix is composed of biotite, which is aligned to form the gneissic layering, together with medium-grained dynamically recrystallised quartz, with lesser plagioclase. Cordierite also occurs within the matrix, in some instances with spinel inclusions.","SAMPLING_FEATURE_NAME":"R1838836","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547718","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9216001728,"LONG_GDA94":135.6177302575,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.915","geometry":{"type":"Point","coordinates":[130.87047248,-20.6780002]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":915,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2127267","IGSN":"10273/AU2127267","SAMPLENO":2127267,"SAMPLE_ID":"MS11JAW001","AGE_MA":2481,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.12,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6184","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NA","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":42069,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU42069","STRAT_UNIT_NAME":"Billabong Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Billabong Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Billabong Complex is a felsic gneiss domain southwest of De Bavay Hills in MOUNT SOLITAIRE and is interpreted to represent the only known Archaean rocks exposed in the Tanami Region. The complex is almost entirely covered by unconsolidated sand and outcrop is limited to a few small tors and pavements of banded quartz- feldspar-biotite-tourmaline granite, phenocrystic feldspar- quartz-biotite gneissic granite, thin quartz-feldspar-rich leucocratic bands and associated mica-rich melanosomes. Outcrop within the vicinity of the Page et al (1995) geochronology site consists of low-lying platformal and domal outcrops and small tors, all difficult to sample. The sample collected for geochronology chiefly comprised homogeneous medium-grained gneissic granite (gneissosity defined by biotite trending 75→155), locally displaying thin quartz+feldspar-rich leucocratic bands and associated mica-rich melanosomes. Rock relationships in the area are quite complex; in addition to the gneissic granite, a porphyritic phase, a more felsic phase, some pegmatitic material and tourmaline granite were observed. The sample was collected to test the veracity of the Archaean age interpreted by Page et al (1995), with additional constraints (ie cathodoluminescence imaging).","SAMPLING_FEATURE_NAME":"MS11JAW001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS550689","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Tanami Orogen","GEOLOGICAL_REGION_NAME":"Tanami Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-20.6780002018,"LONG_GDA94":130.8704724785,"ELEV_M_AHD":427,"ACCURACY_M":20,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68998","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., Close, D.F., Hallett, L., Dunkley, D.J., 2013. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, Ngalia Basin,Tanami Region and Murphy Province July 2011-June 2012. Northern Territory Geological Survey Record, 2013-004, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82463","AGE_ENTRY_DATE":"2012-03-01","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.933","geometry":{"type":"Point","coordinates":[133.61521682,-26.32797816]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":933,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2128551","IGSN":"10273/AU2128551","SAMPLENO":2128551,"SAMPLE_ID":"R1842262","AGE_MA":1145,"AGE_MA_UNCERTAINTY":18,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.57,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4905","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":29906,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU29906","STRAT_UNIT_NAME":"Birksgate Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Birksgate Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was taken from a foliated quartzo-feldspathic augen gneiss on the margin of an isolated porphyritic Pitjantjatjara Supersuite granite (Mp17) pluton which intrudes the low-magnetic gneissic basement in the south-western part of the Tieyon 100k mapsheet. Field observations suggested this was an orthogneiss, with the possibility of it being either part of the typical Birksgate Complex or something similar to the younger 1400 Ma Wankanki Suite from the west Musgrave Province. It is a mesocratic crystalline rock composed of granular cream grains in discontinuous rods or bands, accompanied by intervening aggregates or bands of black flakes (biotite). The sample responds positively to the hand magnet, confirming magnetite occurs in minor amount. This sample is considered to have initially crystallised as a medium-grained monzogranitic intrusive igneous rock composed of K-feldspar + quartz + plagioclase + ferromagnesians + minor others (Fe-Ti oxide, apatite, zircon). The rock underwent ductile deformation and recrystallisation in response to a regional metamorphic event in the amphibolite facies. This caused pervasive recrystallisation of most minerals, and elongation in the trace of a moderate structure (foliation), producing K-feldspar + quartz + plagioclase + biotite + hornblende + opaques (including magnetite) + minor others (titanite, ?apatite, allanite). All of the principal primary minerals recrystallised to form finer-grained aggregates of the same minerals, generating indistinct paler and darker aggregates aligned in the foliation: this is responsible for the discontinuous banding observed in the hand sample. It is possible that zircon and apatite represent relict primary grains, but all others appear to be new metamorphic grains derived in large part by recrystallisation of similar precursor grains.","SAMPLING_FEATURE_NAME":"R1842262","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS551695","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Musgrave Province","GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.3279781578,"LONG_GDA94":133.6152168158,"ELEV_M_AHD":394,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Primary Industries and Resources South Australia (PIRSA)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69640","AGE_REF":"Jagodzinski, E.A., Dutch, R., 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet. Geological Survey of South Australia. Report Book, 2013/00006, 222p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010629","AGE_ENTRY_DATE":"2013-09-25","AGE_LAST_UPDATED":"2020-04-23"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15167","geometry":{"type":"Point","coordinates":[135.05478575,-29.17300446]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15167,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2133224","IGSN":"10273/AU2133224","SAMPLENO":2133224,"SAMPLE_ID":"R698126","AGE_MA":1566,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.65,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6021","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The result is taken from the larger data set collected in Session 1.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"gabbro, Mt Brady Prospect","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"The drillhole DD89LR22 intersected medium-grained gabbro to fine-grained dolerite. No anomalous metal vales are indicated from the assays. The gabbro is dominated by subhedral laths and aggregates of plagioclase, with chloritic hornblende and biotite. The gabbro also includes traces of pyrite and pyrrhotite. Jagodzinski et al 2007 (RB2007/21): This sample is a metagabbro. The gabbro is dominated by subhedral laths and aggregates of plagioclase, with chloritic hornblende and biotite. The gabbro also includes traces of pyrite and pyrrhotite.","SAMPLING_FEATURE_NAME":"DD89LR 22","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH560235","BOREHOLE_TOP_DEPTH_M":145.5,"BOREHOLE_BASE_DEPTH_M":146.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.1730044604,"LONG_GDA94":135.0547857488,"ELEV_M_AHD":151,"ACCURACY_M":999,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"68127; 73611","AGE_REF":"Hand, M., Reid, A., Jagodzinski, L., 2007. Tectonic framework and evolution of the Gawler Craton, southern Australia. Economic Geology, 102(8), 1377-1395.; Jagodzinski, E.A., Reid, A.J., Chalmers, N., Swain, G., Frew, R.A., Foudoulis, C., 2007. Compilation of SHRIMP U-Pb geochronological data for the Gawler Craton, South Australia, 2007. South Australian Department of Primary Industry and Resources, Report Book, 2007/21, 87p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.2113/gsecongeo.102.8.1377; https://pid.sarig.sa.gov.au/document/2019d082700","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3842","geometry":{"type":"Point","coordinates":[135.61691352,-34.92072062]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3842,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124688","IGSN":"10273/AU2124688","SAMPLENO":2124688,"SAMPLE_ID":"R1838837","AGE_MA":1722,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6175","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"charnockite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R1838837 is from the charnockite at Redbanks. The sample is a medium-grained pyroxene-bearing gneiss. The charnockite at Redbanks has ~8% mafic dyke component, which is possibly co-magmatic. Fanning (1997) reported a c. 2000 Ma emplacement age and a c. 1715 Ma metamorphic age from the charnockite. This sample is a coarse-grained orthopyroxene-bearing gneiss of broadly charnockitic composition. Quartz and plagioclase is coarse-grained and occurs in a granoblastic texture. The orthopyroxene occurs as ragged grains interstitial to the quartz-plagioclase matrix. There is minor biotite and an opaque phase that is found in spatial association with the pyroxene.","SAMPLING_FEATURE_NAME":"R1838837","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS547721","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.9207206191,"LONG_GDA94":135.6169135193,"ELEV_M_AHD":5,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69048","AGE_REF":"Jagodzinski, E.A., Reid, A.J., Hand, M., 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Geological Survey of South Australia. Report Book, 2012/00015, 78p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010580","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.3852","geometry":{"type":"Point","coordinates":[136.43313979,-32.7393934]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":3852,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2124697","IGSN":"10273/AU2124697","SAMPLENO":2124697,"SAMPLE_ID":"R1832106","AGE_MA":1693,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"none","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"probability frequency maximum","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6177","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":75847,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU75847","STRAT_UNIT_NAME":"Cleve Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R1832106 is a quartz-feldspar-sillimanite gneiss that represents the principal host lithology within the Mawson Prospect drillholes. The gneiss is leucocratic, and has undergone migmatisation as evident by the differentiated metamorphic layering defined by leucosomes of quartz and feldspar and melanosomes that are rich in biotite. The sample is dominated by a granoblastic quartz-feldspar texture which is dissected by through-going zones of sillimanite (fibrolite) associated with biotite. Quartz shows significant subgrain development, including lobate grain boundaries indicative of high temperature metamorphism, which is likewise indicated by the presence of sillimanite as an aluminosilicate phase. K-feldspar is present as coarse crystals with generally subhedral habit, which preserve cross-hatch twinning. Plagioclase is subordinate, ~20%, although an important component to the gneiss. This gneissic rock has undergone significant secondary alteration. Feldspars, both plagioclase and orthoclase, are clouded by a sericite +/- hematite alteration. Biotite crystals are strongly altered and in places are replaced by chlorite-sericite-leucoxene aggregates.","SAMPLING_FEATURE_NAME":"08MAW009","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH547742","BOREHOLE_TOP_DEPTH_M":174.8,"BOREHOLE_BASE_DEPTH_M":177.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7393934036,"LONG_GDA94":136.4331397925,"ELEV_M_AHD":316,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69047","AGE_REF":"Reid, A., Jagodzinski, E.A., Greene, D., Maas, R., Selby, D., Gregory, C., 2012. Project PGC02-04 and PGC02-05: Geochronology from the Mawson prospect, Weednana Skarn magnetite deposit and the Telephone Dam prospect, South Australia. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects 2011-12. Geological Survey of South Australia. Report Book, 2012/00012, 101-135.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010577","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4443","geometry":{"type":"Point","coordinates":[139.94963062,-21.01541946]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4443,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2808850","IGSN":"10273/AU2808850","SAMPLENO":2808850,"SAMPLE_ID":"BB5944","AGE_MA":1503,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.43,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6427","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":"GSQ - Mary Kathleen Domain","STRATNO":13029,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13029","STRAT_UNIT_NAME":"Mount Philp Breccia","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Philp Breccia","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"hydrothermal breccia","MODE_OF_OCCURRENCE":"matrix","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Polymictic, matrix-supported, magmatic–hydrothermal? breccia, consisting of randomly oriented, angular to rounded fragments and larger ‘rafts’ of country rocks dispersed in a pink to red or, more rarely grey, fine-grained matrix, is exposed at several localities in the southern part of the Mount Isa Inlier, mainly northeast and southeast of Duchess. The largest (ca. 14.5 km2) of these breccias is located ca. 45 km north-northeast of Duchess. The sample (2808850/BB5944) collected for dating is from the matrix of this body, which has a north-northeasterly elongation parallel to the regional structural trend of the enclosing Corella Formation. The matrix is non foliated and has not been recrystallised or deformed to any significant degree (except in and adjacent to faults and shear zones), therefore implying the breccia formed after the enclosing Corella Formation had been deformed and regionally metamorphosed to amphibolite grade. The sample was collected from an extensive pavement in the bed of the Malbon River. The breccia matrix at this locality is grey to pinkish grey, massive, and fine-grained except for the numerous and conspicuous dark green, euhedral–subhedral amphibole (tremolite–actinolite?) grains, which range from <1 cm up to ca. 5 cm in length (most <3 cm). A range of rock types is represented in the clasts, including coarse amphibolite (up to ca. 35 cm across), granite and pegmatite (up to ca. 1.5 m), and calc-silicate rocks (up to ca. 3 m across).","SAMPLING_FEATURE_NAME":"BB5944","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS637098","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.0154194604,"LONG_GDA94":139.9496306243,"ELEV_M_AHD":null,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"pavement in bed of Malbon River","SAMPLE_ACQUISITION_DATE":"2019-03-05","SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72596","AGE_REF":"Kositcin, N., Bultitude, R.J., Purdy, D.J., 2019. Summary of results. Joint GSQ-GA Geochronology Project: Mary Kathleen Domain, Mount Isa Inlier, 2018-2019. Queensland Geological Record, 2019/02, 81p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr117261","AGE_ENTRY_DATE":"2020-04-11","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9870","geometry":{"type":"Point","coordinates":[140.21062992,-19.54880315]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9870,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3316528","IGSN":"10273/AU3316528","SAMPLENO":3316528,"SAMPLE_ID":"DPMI110","AGE_MA":1525,"AGE_MA_UNCERTAINTY":30,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.45,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6443","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":42515,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU42515","STRAT_UNIT_NAME":"Boomarra Metamorphics","INFORMAL_UNIT_NAME":"Boomarra Metamorphics/q","UNIT_NAME_SOURCE":"Boomarra Metamorphics/q","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample 3316528/DPMI110 was collected from a low continuous strike ridge of psammitic schist and quartzite. This is accessed via a network of station tracks west of the Burke Developmental Road in the vicinity of Pigeon House Mountain on the southern part of Boomarra Station. The strike ridge forms the western margin of the outcropping Mary Kathleen Domain. Areas to the west are covered by Cenozoic and Jurassic-Cretaceous sediments and sedimentary rocks. The quartzite sampled at site 3316528/DPMI110 is mapped as part of Boomarra Metamorphics/m, a moderately magnetic subunit (Geological Survey of Queensland, 2011). Prior to this investigation the main constraint on the age of the Boomarra Metamorphics is a crystallisation age of 1776 +/- 8 Ma from a felsic volcanic rock exposed ~3 km to the south (Carson et al., 2009). Page & Sun (1998) also reported depositional ages of 1774 +/- 4 Ma and 1775 +/- 4 Ma for felsic volcaniclastic rocks now mapped as part of the Boomarra Metamorphics. The quartzite is dominated by strained and recrystallised quartz and lesser amounts of muscovite, feldspar and altered phases. This sample was selected for geochronology to compare the provenance spectrum with spectra from the nearby Corella Formation (sample 3316527/DPMI108) and from core samples of metasedimentary rocks of unknown affinities intersected at depth in holes drilled to the west and north.","SAMPLING_FEATURE_NAME":"DPMI110","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS643289","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mary Kathleen Domain","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.5488031504,"LONG_GDA94":140.210629922,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73137","AGE_REF":"Kositcin, N., Purdy, D.J., Bultitude, R.J., Brown, D.D., Hoy, D., 2021. Summary of results. Joint GSQ-GA geochronology project: Mary Kathleen Domain and rocks under younger cover east of the Mount Isa Inlier, 2019-2020. Queensland Geological Record, 2021/01, 112p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr126293","AGE_ENTRY_DATE":"2021-11-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13291","geometry":{"type":"Point","coordinates":[139.752362,-20.554279]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13291,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2614034","IGSN":"10273/AU2614034","SAMPLENO":2614034,"SAMPLE_ID":"LHMAF062","AGE_MA":1602,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.31,"NUMBER_OF_ANALYSES":24,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6345","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"do-MI","UNIT_NAME_SOURCE":"unnamed dolerite (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Unnamed diorite dyke which intrudes the Kalkadoon Granodiorite (granite phase; 2164030/CLISA002), but is itself intruded by competent felsic dyke 2614029/CLISA001.","SAMPLING_FEATURE_NAME":"LHMAF062","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS601635","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kalkadoon-Leichhardt Domain","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.554279,"LONG_GDA94":139.752362,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Lake Julius Road area.","SAMPLE_ACQUISITION_DATE":"2016-07-29","SAMPLE_ORIGINATOR":"Hutton, L.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73568","AGE_REF":"Lewis, C.J., Bultitude, R.J., Hutton, L.J., Waltenberg, K., Armstrong, R.A., Evans, N.J., 2018. Unravelling the pre-1860-1850 Ma 'basement' history of the Mount Isa Inlier. Abstract 142, Australian Geoscience Council Convention, 14-18 October 2018. Australian Geoscience Council Convention, 142, 141p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/120990","AGE_ENTRY_DATE":"2022-08-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8261","geometry":{"type":"Point","coordinates":[146.32453838,-32.10714798]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8261,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2678309","IGSN":"10273/AU2678309","SAMPLENO":2678309,"SAMPLE_ID":"NSWSJAF0165.01D","AGE_MA":404.2,"AGE_MA_UNCERTAINTY":5.1,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.6,"NUMBER_OF_ANALYSES":37,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6361","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal formation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Sample is named JAF02 by Fitzherbert et al. (2021).","AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"skarn","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Remnant fragments of diopside-grossular skarn within in a sphalerite-galena-Au-rich breccia from the Far West lode, Hera mine.","SAMPLING_FEATURE_NAME":"HRUD446","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH621278","BOREHOLE_TOP_DEPTH_M":103.19,"BOREHOLE_BASE_DEPTH_M":103.57,"GEOLOGICAL_PROVINCE":"Cobar Basin","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.1071479836,"LONG_GDA94":146.3245383814,"ELEV_M_AHD":-190,"ACCURACY_M":5,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2017-08-30","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73014","AGE_REF":"Fitzherbert, J.A., McKinnon, A.R., Blevin, P.L., Waltenberg, K., Downes, P.M., Wall, C., Matchan, E.L., Huang, H., 2021. The Hera orebody: a complex distal (Au-Zn-Pb-Ag-Cu) skarn in the Cobar Basin of central New South Wales, Australia. Resource Geology, 71(4), 1-24.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/rge.12262","AGE_ENTRY_DATE":"2021-02-16","AGE_LAST_UPDATED":"2021-02-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9872","geometry":{"type":"Point","coordinates":[140.16308008,-19.67210829]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9872,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3316532","IGSN":"10273/AU3316532","SAMPLENO":3316532,"SAMPLE_ID":"DPMI092c","AGE_MA":1533,"AGE_MA_UNCERTAINTY":24,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.53,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6445","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":4727,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4727","STRAT_UNIT_NAME":"Corella Formation","INFORMAL_UNIT_NAME":"Corella Formation?","UNIT_NAME_SOURCE":"Corella Formation (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"metamorphosed acid igneous volcanic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"half core","SAMPLE_DESC":"Hole CWRM 07-06 was drilled by Red Metal into the Jimmys Creek prospect on the northern part of Coolullah Station ~7 km W of the Burke Developmental Road in December 2007. The hole was orientated at 70 degrees to 086 degrees and intersected basement at 177 m before terminating at 610.8 m. Core from this hole is stored at the John Campbell Miles Drill Core Storage Facility, Mount Isa (Department of Resources) as borehole 72006. The core comprises variably altered metasedimentary rocks including calc-silicates, brecciated metasedimentary or metavolcanic rocks with sulphides, metarhyolite, a thick (~100 m) interval of breccia with clasts of psammite and porphyritic igneous rocks, and psammite with minor biotite schist. We sampled a banded felsic metavolcanic interval to check the solid geology interpretation, which shows this area as comprising Corella Formation? (Geological Survey of Queensland, 2011), and to improve age constraints for the undercover geology of the Mary Kathleen Domain. The analysed sample (3316532/DPMI092c) is an altered felsic metavolcanic from the 592.8 m to 594.6 m interval, comprising bands of slightly differing grainsize and composition (i.e. variable quartz/feldspar ratios). Overall, the rock is dominated by plagioclase and quartz with possible relicts of mafic phases (now secondary titanite).","SAMPLING_FEATURE_NAME":"CORKWOOD CWRM 07-06","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH622028","BOREHOLE_TOP_DEPTH_M":592.8,"BOREHOLE_BASE_DEPTH_M":594.6,"GEOLOGICAL_PROVINCE":"Mary Kathleen Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.6721082876,"LONG_GDA94":140.1630800831,"ELEV_M_AHD":113,"ACCURACY_M":1000,"LOCATION_METHOD":"unpublished report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73137","AGE_REF":"Kositcin, N., Purdy, D.J., Bultitude, R.J., Brown, D.D., Hoy, D., 2021. Summary of results. Joint GSQ-GA geochronology project: Mary Kathleen Domain and rocks under younger cover east of the Mount Isa Inlier, 2019-2020. Queensland Geological Record, 2021/01, 112p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr126293","AGE_ENTRY_DATE":"2021-11-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9873","geometry":{"type":"Point","coordinates":[140.83217307,-19.12080668]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9873,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3316533","IGSN":"10273/AU3316533","SAMPLENO":3316533,"SAMPLE_ID":"DPMI178b","AGE_MA":1521,"AGE_MA_UNCERTAINTY":31,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":3.01,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6444","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed metasandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"sandstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"half core","SAMPLE_DESC":"Hole SXDD001 was drilled by Anglo American between June and October 2008 (Kneeshaw & Haker, 2009; CR56771) to test a SQUID (Super conducting QUantum Interference Device) EM target. The drilling cost was subsidised by the Queensland Department of Mines and Energy Collaborative Drilling Initiative programme. The drill hole is located west of the Flinders River between Clean Skin and Sandy Creek bores, on Wondoola Station. The current basement geology interpretation shows this area as comprising either Mount Fort Constantine Volcanics or Corella Formation (Geological Survey of Queensland, 2018). The hole was orientated at 70 degrees towards 270 degrees and intersected metamorphic basement below the Mesozoic cover sequence at 474.5 m before terminating at 712 m. The upper part of the basement interval is dominated by strongly metasomatised and altered calc-silicate rocks, which are locally cut by pegmatite dykes that become thicker down the hole. A fault at ~667.5 m separates these rocks from an interval of strongly foliated biotite schist, psammite and foliated pegmatite. We sampled a quartzose metasandstone from this interval (sample 3316533/DPMI178b, 693.3-696.5 m) to place an age constraint on deposition of the basement rocks in this area. The sandstone is foliated and consists mainly of strained quartz and altered feldspars. Zircon grains are relatively large and rounded.","SAMPLING_FEATURE_NAME":"SXDD001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH625115","BOREHOLE_TOP_DEPTH_M":693.3,"BOREHOLE_BASE_DEPTH_M":696.5,"GEOLOGICAL_PROVINCE":"Millungera Basin","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-19.1208066844,"LONG_GDA94":140.8321730694,"ELEV_M_AHD":53,"ACCURACY_M":30,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73137","AGE_REF":"Kositcin, N., Purdy, D.J., Bultitude, R.J., Brown, D.D., Hoy, D., 2021. Summary of results. Joint GSQ-GA geochronology project: Mary Kathleen Domain and rocks under younger cover east of the Mount Isa Inlier, 2019-2020. Queensland Geological Record, 2021/01, 112p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr126293","AGE_ENTRY_DATE":"2021-11-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13404","geometry":{"type":"Point","coordinates":[135.6732669,-32.6585179]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13404,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2613693","IGSN":"10273/AU2613693","SAMPLENO":2613693,"SAMPLE_ID":"R2137926","AGE_MA":1723,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.68,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6335","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"resetting event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":27899,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27899","STRAT_UNIT_NAME":"Sleaford Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R2137926 comes from drillhole MSDP08 (294-296 m) and is a medium- to coarse-grained, granoblastic leucocratic orthogneiss containing clots of mafic minerals. It is representative of a distinct lithology in the drillhole that is present between the intervals 265.5-268.4 m, 292.4-300.7 m, 374.4-380 m, 405.2-429.8 m and 432.5-440.6 m. It is interleaved with more \"mafic\" gneiss and intruded by fine- to coarse-grained metagranite (represented by sample R2137895). In thin section (R2137947 and similar unit in R2137945 and R2137951), the rock has locally preserved granitic texture that was modified by ductile deformation. Feldspar (plagioclase and K-feldspar) and quartz dominate with subordinate muscovite and chlorite after biotite. Alkali feldspar crystals commonly show perthitic texture. Black clots in the rock are mainly composed of chlorite, biotite and an unidentified mineral that is brown in plane polarised light with low interference colours (grey to black) in cross-polarised light. Minerals within these clots are foliated. Feldspar is commonly altered, containing sericite. Quartz forms anhedral grains with undulose extinction. Thin foliated or anastomosing lenses of a fibrous mineral, possibly sillimanite, occur in the rock and may indicate that it is equivalent to similarly described metagranitoids at the Paris Ag-Pb deposit about 32 km to the E.","SAMPLING_FEATURE_NAME":"MSDP08","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH599525","BOREHOLE_TOP_DEPTH_M":294,"BOREHOLE_BASE_DEPTH_M":296,"GEOLOGICAL_PROVINCE":"Coulta Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.6585179047,"LONG_GDA94":135.6732669008,"ELEV_M_AHD":201,"ACCURACY_M":1,"LOCATION_METHOD":"GPS differential observation, survey quality","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2016-08-19","SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73104","AGE_REF":"Jagodzinski, E.A., Werner, M., Curtis, S.O., Fabris, A., Pawley, M.J., Krapf, C.B.E., 2020. SHRIMP geochronology of the Mount Double area, Southern Gawler Ranges margin. Geological Survey of South Australia. Report Book, 2020/00006, 94p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20036188","AGE_ENTRY_DATE":"2022-11-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13423","geometry":{"type":"Point","coordinates":[132.18210333,-31.11206724]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13423,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2666267","IGSN":"10273/AU2666267","SAMPLENO":2666267,"SAMPLE_ID":"R2322230","AGE_MA":1698,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.15,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6352","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Drillhole WGD0001 comprises interlayered mafic gneiss and felsic gneiss, including zones of pyroxenite, gabbro and foliated felsic gneiss. There are also pegmatite intrusions that are undeformed and cross-cut the tectonic foliation within the gneissic rocks. Sample R2322230 is an example of the felsic composition of meta-igneous rock within drillhole WGD0001. The meta-granite contains muscovite and biotite and is foliated, with the mineral alignment parallel to the main foliation present within the mafic rocks of the drillhole. The sample is a quartz-K-feldspar-plagioclase-biotite-muscovite metagranite. The quartz is intergrown in a granoblastic texture with K-feldspar and plagioclase. The grain size is bimodal. There are equant grains that form the matrix of the rock and there are zones of medium- to fine-grained recrystallised quartz that form a foliation within the rock. This grain size distribution is similar for the K-feldspar, which forms both larger (2-3 mm) crystals that have smaller (~50-100 micron) dynamically recrystallised grains and subgrains that rim the larger K-feldspars. K-feldspar crystals also show deformation bands that reorient the tartan twinning within individual crystals. The texture is suggestive of an early higher temperature stage of recrystallisation to produce a granoblastic texture, followed by a lower temperature stage of deformation that produced the recrystallisation of the edges of the K-feldspar and dynamic recrystallisation of the quartz. Plagioclase is also present within the granoblastic texture and is weakly sericitised. Biotite occurs as laths both within the granoblastic texture and within the narrow finer grained recrystallised quartz-feldspar zones. There is minor muscovite.","SAMPLING_FEATURE_NAME":"WGD0001","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH606307","BOREHOLE_TOP_DEPTH_M":540.7,"BOREHOLE_BASE_DEPTH_M":541.46,"GEOLOGICAL_PROVINCE":"Fowler Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.1120672387,"LONG_GDA94":132.1821033327,"ELEV_M_AHD":200,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2017-05-09","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73612","AGE_REF":"Jagodzinski, E.A., Reid, A., Gribbin, G., 2019. U-Pb geochronological data from the Fowler Domain, western Gawler Craton. Geological Survey of South Australia. Report Book, 2019/00018, 58p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2019d059057","AGE_ENTRY_DATE":"2022-11-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13081","geometry":{"type":"Point","coordinates":[133.90383603,-19.71968139]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13081,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2765170","IGSN":"10273/AU2765170","SAMPLENO":2765170,"SAMPLE_ID":"92-231A","AGE_MA":1858,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.21,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6416","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"EFTF","STRATNO":30741,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU30741","STRAT_UNIT_NAME":"Warramunga Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample TC2765170, a garnet schist, was chosen as a representative pelitic sample from the supracrustal package of deformed and metamorphosed basement rocks west-southwest of Tennant Creek, in the Tennant Region. We aimed to determine the age of tectono-metamorphism in this sample in order to establish whether its recorded tectonism was associated with the Tennant Event. This would resolve uncertainty surrounding the timing of this event and help determine whether deposition of this package of rocks might pre-date the ca. 1860 Ma Warramunga Formation. Sample TC2765170 is a sub-sample of a sample collected as part of Compston’s (1994) PhD thesis (his sample 92–231). This sample was originally obtained from a downhole depth of 201.8-203.9 m in drill core BMR 3, hole 158 (Bell and Hallof, 1962). Major mineral phases include plagioclase, garnet, magnetite, quartz and biotite which, in the absence of any obvious disequilibrium textures, are interpreted to comprise a peak metamorphic assemblage. Garnet grains are subhedral and up to 2 mm in diameter. Matrix minerals (quartz, plagioclase, magnetite, biotite) define a pervasive weak to moderate foliation that does not wrap around garnet. Aggregates of quartz commonly feature amoeboid grain boundaries and exhibit chessboard extinction, which indicates deformation at temperatures within the amphibolite facies. Monazite is present in trace amounts throughout the matrix (mostly included in biotite) and locally within garnet grains. Monazite grains are subhedral, up to 150 um long, weakly aligned to the pervasive foliation, and exhibit zoning in backscattered electron (BSE) imagery. There is no evidence of significant retrograde alteration in this sample, although the pervasive foliation is crosscut by an intense but spaced foliation defined by sheared mica, quartz and magnetite, which does wrap around garnet. As a proportion of the total rock mass, any mineral regrowth associated with this younger foliation is minor.","SAMPLING_FEATURE_NAME":"BMR 3, Hole 158","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH171033","BOREHOLE_TOP_DEPTH_M":201.8,"BOREHOLE_BASE_DEPTH_M":203.9,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.7196813921,"LONG_GDA94":133.9038360333,"ELEV_M_AHD":297,"ACCURACY_M":1000,"LOCATION_METHOD":"1:100 000 map","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Skirrow, R.G.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73427","AGE_REF":"Clark, A.D., Morrissey, L.J., Doublier, M.P., Kositcin, N., Schofield, A., Skirrow, R.G., 2022. A newly recognised 1860-1840 Ma tectono-magmatic domain in the North Australia Craton: Insights from the Tennant Region, East Tennant area, and the Murphy Inlier. Precambrian Research, 375(1-4), 106652, 17p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2022.106652","AGE_ENTRY_DATE":"2022-04-11","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13405","geometry":{"type":"Point","coordinates":[135.7779899,-32.64767036]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13405,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2561164","IGSN":"10273/AU2561164","SAMPLENO":2561164,"SAMPLE_ID":"R2147102","AGE_MA":2425,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6334","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":5878,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU5878","STRAT_UNIT_NAME":"Dutton Suite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R2147102 was collected from low, rounded boulders and platforms of foliated metamonzogranite about 11.5 km ESE of Mount Double. The metamonzogranite is fine- to medium-grained and sparsely porphyritic. The feldspars are up to 5 mm long, and phenocrysts are often tabular with simple twinning (i.e. K-feldspar). Quartz ranges from mm-scale equant grains in less foliated areas, to recrystallised ribbons up to 3 mm long. Biotite forms mm-scale flakes, and pervasive fine wispy aggregates (less than 2 mm long). Quartz ribbons and biotite define a NNW-striking foliation that dips steeply E. On the YARDEA 1:250 000 map sheet the metamonzogranite was tentatively attributed to the Sleaford Complex. Its mineralogy and geochemistry supports correlation with the Kiana Granite of the Dutton Suite. The metamonzogranite outcrop is about 600 m W of a low NNW-striking ridge with abundant quartzite outcrop. Bedding is aligned sub-parallel to a moderately developed NNW-striking foliation that dips steeply ENE (78 to 070). There is also a lineation on the foliation plane, defined by elongate quartz ribbons that plunge shallowly NNW (13 to 344). Regionally, the quartzite defines a series of NNW-striking, upright, tight to isoclinal folds that plunge shallowly NNW. These rocks have been assigned to the Palaeoproterozoic Warrow Quartzite, which is interpreted to have a maximum depositional age of c. 2000 Ma with older age populations at c. 3200 and 2500 Ma. The metamonzogranite would structurally underlie the quartzite unit, with the folded contact suggesting it was relatively planar and sub-parallel to bedding. However, the relationship between the two rock types is unclear. The metamonzogranite may be older than the sediments and the contact represents a nonconformity. Alternatively, the protolith to the metamonzogranite may be younger and intrude the sedimentary package as a large-scale sill. Furthermore, the contact may have been subsequently tectonised.","SAMPLING_FEATURE_NAME":"R2147102","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS600520","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.6476703588,"LONG_GDA94":135.7779898986,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"About 8.5 km NW of Peter Pan Dam.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73104","AGE_REF":"Jagodzinski, E.A., Werner, M., Curtis, S.O., Fabris, A., Pawley, M.J., Krapf, C.B.E., 2020. SHRIMP geochronology of the Mount Double area, Southern Gawler Ranges margin. Geological Survey of South Australia. Report Book, 2020/00006, 94p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20036188","AGE_ENTRY_DATE":"2022-11-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13406","geometry":{"type":"Point","coordinates":[135.7779899,-32.64767036]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13406,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2561164","IGSN":"10273/AU2561164","SAMPLENO":2561164,"SAMPLE_ID":"R2147102","AGE_MA":1716,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.74,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6334","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":5878,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU5878","STRAT_UNIT_NAME":"Dutton Suite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"monzogranite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample R2147102 was collected from low, rounded boulders and platforms of foliated metamonzogranite about 11.5 km ESE of Mount Double. The metamonzogranite is fine- to medium-grained and sparsely porphyritic. The feldspars are up to 5 mm long, and phenocrysts are often tabular with simple twinning (i.e. K-feldspar). Quartz ranges from mm-scale equant grains in less foliated areas, to recrystallised ribbons up to 3 mm long. Biotite forms mm-scale flakes, and pervasive fine wispy aggregates (less than 2 mm long). Quartz ribbons and biotite define a NNW-striking foliation that dips steeply E. On the YARDEA 1:250 000 map sheet the metamonzogranite was tentatively attributed to the Sleaford Complex. Its mineralogy and geochemistry supports correlation with the Kiana Granite of the Dutton Suite. The metamonzogranite outcrop is about 600 m W of a low NNW-striking ridge with abundant quartzite outcrop. Bedding is aligned sub-parallel to a moderately developed NNW-striking foliation that dips steeply ENE (78 to 070). There is also a lineation on the foliation plane, defined by elongate quartz ribbons that plunge shallowly NNW (13 to 344). Regionally, the quartzite defines a series of NNW-striking, upright, tight to isoclinal folds that plunge shallowly NNW. These rocks have been assigned to the Palaeoproterozoic Warrow Quartzite, which is interpreted to have a maximum depositional age of c. 2000 Ma with older age populations at c. 3200 and 2500 Ma. The metamonzogranite would structurally underlie the quartzite unit, with the folded contact suggesting it was relatively planar and sub-parallel to bedding. However, the relationship between the two rock types is unclear. The metamonzogranite may be older than the sediments and the contact represents a nonconformity. Alternatively, the protolith to the metamonzogranite may be younger and intrude the sedimentary package as a large-scale sill. Furthermore, the contact may have been subsequently tectonised.","SAMPLING_FEATURE_NAME":"R2147102","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS600520","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.6476703588,"LONG_GDA94":135.7779898986,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"About 8.5 km NW of Peter Pan Dam.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of South Australia","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73104","AGE_REF":"Jagodzinski, E.A., Werner, M., Curtis, S.O., Fabris, A., Pawley, M.J., Krapf, C.B.E., 2020. SHRIMP geochronology of the Mount Double area, Southern Gawler Ranges margin. Geological Survey of South Australia. Report Book, 2020/00006, 94p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20036188","AGE_ENTRY_DATE":"2022-11-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8062","geometry":{"type":"Point","coordinates":[146.32915475,-32.11385567]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8062,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2615454","IGSN":"10273/AU2615454","SAMPLENO":2615454,"SAMPLE_ID":"NSWSJAF0158.01A","AGE_MA":382.5,"AGE_MA_UNCERTAINTY":2.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":25,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6344","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"hydrothermal formation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Fitzherbert et al. (2021) named this sample JAF03, and quoted this lower-intercept date as 382.5 +/- 3.1 Ma (95% confidence), taking into account all systematic sources of uncertainty in the U-Pb system.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":381,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU381","STRAT_UNIT_NAME":"Amphitheatre Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":"vein","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample of coarse-grained hydrothermal titanite is from a large and irregular zone of quartz veining in the 435-vent access drive of the Hera mine. The 435m level vent access is approximately 20 metres laterally from the main ore zone. This zone of quartz veining is inferred to have formed late based on the presence of associated large open vughs. The area also contained very large (to 20 cm), clear quartz crystals, often coated in zeolite minerals including stilbite, prehnite and clinoptilolite. Massive vermicular chlorite also fills some of these vughs. The titanite is typically at or near the wall rock contact, often with a thin band of K-feldspar. Sphalerite associated with this zone has very high iron content. Rough paragenesis for this zone is: titanite>microcline>massive milky quartz>quartz crystals>zeolite/massive chlorite. The wall rock contacts with these veins are often pervasively silicified, with a zone of bleaching 10-300 mm wide. These quartz veins are interpreted to postdate the main phase of mineralisation at the Hera mine.","SAMPLING_FEATURE_NAME":"NSWSJAF0158","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS602827","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Cobar Basin","GEOLOGICAL_REGION_NAME":"Darling Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.11385567,"LONG_GDA94":146.32915475,"ELEV_M_AHD":855,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2016-11-12","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72528; 73014","AGE_REF":"Waltenberg, K., Blevin, P.L., Hughes, K.S., Bull, K.F., Fitzherbert, J.A., Cronin, D.E., Bultitude, R.J., 2019. New SHRIMP U-Pb zircon and titanite ages from the Lachlan Orogen and the New England Orogen, New South Wales: Mineral Systems Projects, July 2016-June 2017. Geoscience Australia. Record, 2019/05, 130p.; Fitzherbert, J.A., McKinnon, A.R., Blevin, P.L., Waltenberg, K., Downes, P.M., Wall, C., Matchan, E.L., Huang, H., 2021. The Hera orebody: a complex distal (Au-Zn-Pb-Ag-Cu) skarn in the Cobar Basin of central New South Wales, Australia. Resource Geology, 71(4), 1-24.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2019.005; https://doi.org/10.1111/rge.12262","AGE_ENTRY_DATE":"2020-11-16","AGE_LAST_UPDATED":"2021-02-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4237","geometry":{"type":"Point","coordinates":[134.85887062,-23.12325363]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4237,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2676602","IGSN":"10273/AU2676602","SAMPLENO":2676602,"SAMPLE_ID":"AS16MVM006","AGE_MA":1726,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.39,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6359","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Bungatina Metamorphics","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of granitic gneiss was collected from outcrop at the Oonagalabi Cu-Zn deposit in east-central Riddoch ~100 m north of an access track that connects the Oonagalabi deposit with White Hill Dam. The sampled granitic gneiss is located in the footwall to the Oonagalabi deposit about 400 m north of the anthophyllite-bearing mineralised horizon. The sampled outcrop is banded orthogneiss consisting of banded layers of quartz, K-feldspar and plagioclase with speckled biotite. Distinct coarse-grained lenticular orthoclase and plagioclase porphyroblasts are commonly wrapped by the gneissic banding, which shows a characteristic augen texture. Orthoclase shows crossed-hatched twinning, whereas plagioclase typically shows polysynthetic twinning. Biotite commonly occurs on grain boundaries parallel to the gneissic foliation. Garnet porphyroclasts are heavily fractured and commonly poikiloblastic, containing quartz or biotite inclusions. Bulk rock geochemistry indicates a sub-alkaline chemistry consistent with a granite or rhyolite. Based on these observations, and particularly that of large feldspar phenocrysts, the orthogneiss is interpreted to have an igneous (granitic) origin as a shallow intrusive/sub-volcanic sill or dyke.","SAMPLING_FEATURE_NAME":"AS16MVM006","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS620551","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.1232536303,"LONG_GDA94":134.8588706152,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71839","AGE_REF":"Kositcin, N., McGloin, M.V., Reno, B.L., Weisheit, A., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Base metal and tungsten mineralisation, and skarn alteration in the Aileron Province, July 2017-June 2018. Northern Territory Geological Survey Record, 2018-009, 34p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87718","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4238","geometry":{"type":"Point","coordinates":[134.8595338,-23.12416658]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4238,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2676603","IGSN":"10273/AU2676603","SAMPLENO":2676603,"SAMPLE_ID":"AS16MVM018","AGE_MA":1734,"AGE_MA_UNCERTAINTY":21,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.49,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6359","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Bungatina Metamorphics","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of felsic gneiss was collected from outcrop at the  Oonagalabi deposit in east-central Riddoch, ~15 m south of an access track that connects the Oonagalabi deposit to White Hill Dam. The sampled biotite–feldspar–garnet–quartz gneiss is located in the footwall to the Oonagalabi deposit 235 m northwest from the anthophyllite-bearing mineralised horizon. The host rock contains megacrystic and porphyroblastic orthoclase, plagioclase and garnet within a matrix of biotite, quartz, plagioclase and orthoclase. The gneiss is commonly migmatitic, with protomylonite deformation overprinting leucosome-rich zones within the gneiss. The gneiss is recrystallised and composed of a mesocratic assemblage of banded orthoclase, plagioclase, garnet, biotite and quartz with accessory zircon and monazite. Elongate biotite laths overprint the main feldspar–quartz–garnet assemblage with biotite preserving a foliation fabric that wraps around larger porphyroblasts of orthoclase, plagioclase and garnet. Orthoclase generally shows simple twinning, whereas plagioclase has weak polysynthetic twinning. Garnet is poikiloblastic and commonly contains quartz inclusions. The garnet is also heavily fractured. Biotite commonly replaces and overprints garnet. The observed mineralogy is consistent with either a sedimentary (sandstone) or intermediate igneous (dacite) protolith. If the protolith was igneous, whole rock geochemistry from the sample is consistent with a sub-alkaline dacitic composition. Based on the available petrological and chemical evidence, the sampled rock could plausibly have an intermediate igneous, volcaniclastic or sedimentary origin.","SAMPLING_FEATURE_NAME":"AS16MVM018","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS620552","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.1241665843,"LONG_GDA94":134.8595338022,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71839","AGE_REF":"Kositcin, N., McGloin, M.V., Reno, B.L., Weisheit, A., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Base metal and tungsten mineralisation, and skarn alteration in the Aileron Province, July 2017-June 2018. Northern Territory Geological Survey Record, 2018-009, 34p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87718","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9871","geometry":{"type":"Point","coordinates":[139.91891158,-21.65061349]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9871,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3316530","IGSN":"10273/AU3316530","SAMPLENO":3316530,"SAMPLE_ID":"BB5961","AGE_MA":1524,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.77,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6443","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":4727,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4727","STRAT_UNIT_NAME":"Corella Formation","INFORMAL_UNIT_NAME":"Corella Formation/q","UNIT_NAME_SOURCE":"Corella Formation (subunit kc/q) (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Corella Formation is the main component of the Mary Kathleen Group, which unconformably overlies the Argylla Formation (Derrick et al., 1976, 1977a, b; Hutton & Withnall, 2013) in the northern and central parts of the domain. Igneous rocks from the Argylla Formation yielded several U-Pb zircon dates in the range ~1775-1780 Ma (Neumann et al., 2009; Geoscience Australia, 2011), constraining the maximum age of the Corella Formation to ~1770 Ma. However, ongoing work in the Tick Hill area in the far southern part of the domain suggest calc-silicate rocks currently mapped as Corella Formation (GSQ, 2011) are either intruded by ~1775-1780 Ma and significantly older granitic rocks, or are tectonically interleaved with them (Le, 2020; Dirks et al., 2020; unpublished reports to GSQ). This is not the first time the possibility of the Corella Formation containing rocks older than the Argylla Formation has been mooted. Blake et al. (1978), Bultitude et al. (1978), and Blake (1980, 1982, 1983, 1987) suggested the Corella Formation included an older assemblage, based on apparent interfingering relationships in the southern part of the domain between calc-silicate rocks and granitic gneisses similar to those exposed in the nearby Kalkadoon-Leichhardt Domain to the west. Glassy quartzite ~815 m SW of the abandoned Tick Hill gold mine and mapped as unnamed subunit kc/q of the Corella Formation (GSQ, 2011) was sampled to provide some control on the age of the formation in the southern part of the Mary Kathleen Domain. Feldspathic quartzite east of Duchess previously yielded a maximum depositional age of 1752 +/- 2 Ma (Kositcin et al., 2019). The quartzite near Tick Hill forms low rubbly outcrops on a ridge, in an area of poor outcrop. No relic sedimentary structures were recognised in the quartzite. Nearby outcrops comprise mainly calc-silicate rocks metamorphosed to middle-upper amphibolite grade. The rocks are strongly deformed, commonly with a mylonitic fabric.","SAMPLING_FEATURE_NAME":"BB5961","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS643291","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mary Kathleen Domain","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.6506134883,"LONG_GDA94":139.9189115765,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73137","AGE_REF":"Kositcin, N., Purdy, D.J., Bultitude, R.J., Brown, D.D., Hoy, D., 2021. Summary of results. Joint GSQ-GA geochronology project: Mary Kathleen Domain and rocks under younger cover east of the Mount Isa Inlier, 2019-2020. Queensland Geological Record, 2021/01, 112p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr126293","AGE_ENTRY_DATE":"2021-11-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8061","geometry":{"type":"Point","coordinates":[146.32915475,-32.11385567]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8061,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2615455","IGSN":"10273/AU2615455","SAMPLENO":2615455,"SAMPLE_ID":"NSWSJAF0158.01B","AGE_MA":383.4,"AGE_MA_UNCERTAINTY":2.9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":26,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6344","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal formation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Fitzherbert et al. (2021) named this sample JAF04, and quoted this lower-intercept date as 383.4 +/- 3.4 Ma (95% confidence), taking into account all systematic sources of uncertainty in the U-Pb system.","AGE_SOURCE":null,"PROJECT":null,"STRATNO":381,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU381","STRAT_UNIT_NAME":"Amphitheatre Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":"vein","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample of coarse-grained quartz vein-hosted pink hydrothermal titanite is from a large horizontal vein from the 460 level of the Hera mine. A series of laminated quartz veins striking 005-015 and dipping ~75° east are present in the main north 460 m level ore drive at Hera mine. These veins are late-stage features in the mine paragenesis at Hera, cutting both the orebody and the ~80 west dipping foliation that enveloped the orebody and forming the faulted terminations of ore lenses. The near-horizontal quartz vein sampled is interpreted as a step/jog between the steep, laminated veins of which NSWSJAF0158.01A/GA2615454  is representative and is interpreted to be the same age. These vein systems are generally barren of mineralisation, but may contain high-Fe sphalerite, fibrous tourmaline, chlorite, biotite, Ca-stilbite, clinoptilolite and adularia alongside the titanite. These veins postdate the main phase of mineralisation and high-temperature alteration and will help constrain the timing of ore deposition.","SAMPLING_FEATURE_NAME":"NSWSJAF0158","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS602827","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Cobar Basin","GEOLOGICAL_REGION_NAME":"Darling Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.11385567,"LONG_GDA94":146.32915475,"ELEV_M_AHD":855,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2016-11-23","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72528; 73014","AGE_REF":"Waltenberg, K., Blevin, P.L., Hughes, K.S., Bull, K.F., Fitzherbert, J.A., Cronin, D.E., Bultitude, R.J., 2019. New SHRIMP U-Pb zircon and titanite ages from the Lachlan Orogen and the New England Orogen, New South Wales: Mineral Systems Projects, July 2016-June 2017. Geoscience Australia. Record, 2019/05, 130p.; Fitzherbert, J.A., McKinnon, A.R., Blevin, P.L., Waltenberg, K., Downes, P.M., Wall, C., Matchan, E.L., Huang, H., 2021. The Hera orebody: a complex distal (Au-Zn-Pb-Ag-Cu) skarn in the Cobar Basin of central New South Wales, Australia. Resource Geology, 71(4), 1-24.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2019.005; https://doi.org/10.1111/rge.12262","AGE_ENTRY_DATE":"2020-11-16","AGE_LAST_UPDATED":"2021-02-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4445","geometry":{"type":"Point","coordinates":[140.00152467,-20.33952912]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4445,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2808849","IGSN":"10273/AU2808849","SAMPLENO":2808849,"SAMPLE_ID":"DPMI056","AGE_MA":1527,"AGE_MA_UNCERTAINTY":16,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.16,"NUMBER_OF_ANALYSES":38,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6427","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":"GSQ - Mary Kathleen Domain","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"do/4?-MI","UNIT_NAME_SOURCE":"unnamed quartz diorite (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":"intrusion","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample DPMI056 was taken from a rocky knoll in the centre of a circular structure formed by the Corella Formation, Wonga Granite and unnamed mafic intrusions on Mount Maggie station, ca. 11 km north-northwest of Mount Maggie. Within this structure, the Corella Formation and most bodies of Wonga Granite are strongly foliated. In contrast, the unnamed mafic intrusion(s) including that sampled at DPMI056 are unfoliated. This contrast and the overall dome-like structure of the region suggest that the mafic intrusion may be relatively young. The sample selected is a fine-grained, locally sparsely porphyritic biotite–hornblende quartz diorite. In outcrop, the rock is locally heterogeneous and contains inclusions, leucocratic segregations and areas that are coarsely porphyritic. Zircon was observed in thin section as a small accessory phase and the sample has high Zr (460 ppm) based on a whole rock analysis. Titanite was also observed in thin section and occurs both as a euhedral to subhedral phase that may be primary and as a fine secondary phase surrounding rutile.","SAMPLING_FEATURE_NAME":"DPMI056","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS637097","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.3395291154,"LONG_GDA94":140.0015246683,"ELEV_M_AHD":null,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Mount Maggie Station, approx. 11 km north-northwest of mount Maggie","SAMPLE_ACQUISITION_DATE":"2019-02-28","SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72596","AGE_REF":"Kositcin, N., Bultitude, R.J., Purdy, D.J., 2019. Summary of results. Joint GSQ-GA Geochronology Project: Mary Kathleen Domain, Mount Isa Inlier, 2018-2019. Queensland Geological Record, 2019/02, 81p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr117261","AGE_ENTRY_DATE":"2020-04-11","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4240","geometry":{"type":"Point","coordinates":[135.75059283,-22.7595979]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4240,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2673489","IGSN":"10273/AU2673489","SAMPLENO":2673489,"SAMPLE_ID":"HU17BLR1627","AGE_MA":1717,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.31,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6355","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":23539,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23539","STRAT_UNIT_NAME":"Deep Bore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU17BLR1672 was collected from a grey-coloured gneiss in the Molyhil W-Mo deposit in central Jinka. The Molyhil pit exposes skarn mineralisation associated with metre- to decimetre-scale bodies and veins of variably deformed and altered Marshall Granite intruding calc-silicate rock of the Deep Bore Metamorphics and an unnamed grey-coloured gneiss. The grey-coloured gneiss is the dominant lithology in the pit; however, it is pervasively altered such that its protolith is uncertain. Sample HU17BLR1672 was collected from the grey coloured gneiss that crops out in the northeastern pit wall in order to identify the protolith. The sample is a strongly altered and weathered plagioclase-quartz-biotite-sillimanite-andalusite-ilmenite gneiss with a well-developed foliation defined by biotite and plagioclase. Plagioclase is subhedral to euhedral, medium- to coarse-grained (2-5 mm), and variably altered to sericite. Prismatic sillimanite ranges in length from 3-12 mm and is commonly fibrolitic. Minor andalusite is rarely poikiloblastic with inclusions of quartz and is interpreted to post-date sillimanite. Biotite up to 5 mm is interstitial between plagioclase crystals. Accessory ilmenite is up to 0.5 mm and occurs as inclusions in plagioclase and biotite.","SAMPLING_FEATURE_NAME":"HU17BLR1627","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS606677","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7595978954,"LONG_GDA94":135.750592832,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71839","AGE_REF":"Kositcin, N., McGloin, M.V., Reno, B.L., Weisheit, A., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Base metal and tungsten mineralisation, and skarn alteration in the Aileron Province, July 2017-June 2018. Northern Territory Geological Survey Record, 2018-009, 34p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87718","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1121","geometry":{"type":"Point","coordinates":[136.70300803,-12.21168451]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1121,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2179941","IGSN":"10273/AU2179941","SAMPLENO":2179941,"SAMPLE_ID":"GV14SKR061B","AGE_MA":1857,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6289","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"interpreted to reflect timing of zircon growth during metamorphism and intrusion of S-type granite into this unit","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":30958,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU30958","STRAT_UNIT_NAME":"Melville Bay Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Melville Bay Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"quartzite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of dense, massive, gt-bearing reddish-green quartzite  was collected at an abandoned quarry, previously mapped as Drimmie Head Granite, located at the north-western coast of Drimmie Head Peninsula, in northern GOVE. The sample locality is an abandoned quarry of ca. 300x50 m size, and ca. 15m deep. Sample GV14SKR061B was taken from the main lithology present at that quarry, a very hard, dense, massive, reddish-green quartzite with up to cm-sized, subhedral garnet blasts. This quartzite shows locally a relic mm- to cm-thick original sedimentary layering, and dm-to sub-m thick bedding. It contains (mostly elongated) clasts of a fine-grained, grey meta-sandstone featuring sub-mm thin relic sedimentary layering. The quartzite is intruded by veins/dykes and small intrusions of gt-bearing granite (likely Drimmie Head Granite) which crosscuts and intrudes parallel to the original sedimentary bedding. It is thought that this quartzite may pertain to the Melville Bay Metamorphics, a succession of  metasedimentary gneisses comprised dominantly of garnet-cordierite-biotite schistose gneiss with subordinate metapsammite. The Drimmie Head Granite, interpreted to intrude the Melville Bay Metamorphics, and indeed based on field relationships represents an area of crystallised in-situ melt derived from the metasedimentary succession during peak metamorphism, yielded SHRIMP U-Pb zircon dating of the crystallisation age of 1867 ± 12 Ma (Rawlings et al 1997). No previous dating has been undertaken on the Melville Bay Metamorphics.","SAMPLING_FEATURE_NAME":"GV14SKR061B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578757","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arnhem Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.2116845147,"LONG_GDA94":136.7030080328,"ELEV_M_AHD":9,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71605","AGE_REF":"Kositcin, N., Whelan, J.A., Reno, B.L., Kraus, S., Beyer, E.E., 2018. Summary of results: NTGS-GA geochronology project: Arnhem Province, July 2014-June 2016. Northern Territory Geological Survey Record, 2017-008, 37p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87054","AGE_ENTRY_DATE":"2015-10-15","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13292","geometry":{"type":"Point","coordinates":[139.752245,-20.554097]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13292,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2614029","IGSN":"10273/AU2614029","SAMPLENO":2614029,"SAMPLE_ID":"CLISA001","AGE_MA":1601,"AGE_MA_UNCERTAINTY":14,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.26,"NUMBER_OF_ANALYSES":18,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6345","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed felsic dyke","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"dyke","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Biotite foliated, fine- to medium-grained, felsic dyke in Leichhardt River. This competent dyke intrudes diorite dyke 2614034/LHMAF062, which itself intrudes the Kalkadoon Granodiorite (granite phase; 2614030/CLISA002).","SAMPLING_FEATURE_NAME":"CLISA001","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS601633","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kalkadoon-Leichhardt Domain","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.554097,"LONG_GDA94":139.752245,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Lake Julius Road area.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73568","AGE_REF":"Lewis, C.J., Bultitude, R.J., Hutton, L.J., Waltenberg, K., Armstrong, R.A., Evans, N.J., 2018. Unravelling the pre-1860-1850 Ma 'basement' history of the Mount Isa Inlier. Abstract 142, Australian Geoscience Council Convention, 14-18 October 2018. Australian Geoscience Council Convention, 142, 141p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/120990","AGE_ENTRY_DATE":"2022-08-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1149","geometry":{"type":"Point","coordinates":[135.55895707,-22.6957403]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1149,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2307041","IGSN":"10273/AU2307041","SAMPLENO":2307041,"SAMPLE_ID":"HU15EEB1004","AGE_MA":1738,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.66,"NUMBER_OF_ANALYSES":9,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6311","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"metamorphic rims formed during high thermal gradient metamorphism","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":23539,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23539","STRAT_UNIT_NAME":"Deep Bore Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Deep Bore Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU15EEB1004 is an orthopyroxene–garnet migmatite collected approximately 3 km southwest of Deep Bore in western Jinka. Melanocratic portions of the rock comprise mm-scale biotite–K-feldspar–plagioclase–quartz. Quartz and feldspar are subhedral and unaligned in foliation whereas biotite appears interstitial and weakly aligned to form a main foliation. Cm-scale leucocratic layers are subparallel to the main foliation and contain cm-scale orthopyroxene with mm-scale cordierite inclusions. The leucocratic matrix comprises 5–10 mm K-feldspar with micron-scale plagioclase lamellae and inclusions of sillimanite, 2–7 mm plagioclase, and quartz. K-feldspar–orthopyroxene grain boundaries are buffered by a micron-scale quartz mantle. Monazite and zircon occur both in the melanocratic portion of the rock and in the leucosome; however, neither were observed as inclusions in garnet.","SAMPLING_FEATURE_NAME":"HU15EEB1004","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598139","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arunta Orogen","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6957403048,"LONG_GDA94":135.5589570711,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71750","AGE_REF":"Kositcin, N., Reno, B.L., Beyer, E.E., 2018. Summary of results. Joint NTGS-GA geochronology project: Aileron Province, July 2015-June 2016. Northern Territory Geological Survey Record, 2018-005, 36p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87168","AGE_ENTRY_DATE":"2018-05-14","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9703","geometry":{"type":"Point","coordinates":[143.43704252,-13.38082543]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9703,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2614016","IGSN":"10273/AU2614016","SAMPLENO":2614016,"SAMPLE_ID":"DBCY051","AGE_MA":414,"AGE_MA_UNCERTAINTY":3.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.38,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6338","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":4294,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4294","STRAT_UNIT_NAME":"Coen Metamorphic Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Coen Metamorphic Group covers the northern extent of the Savannah Province and is in contact with the Iron Range Province and the Newberry Metamorphic Group of the Etheridge Province. The purpose of analysing DBCY051/2614016 is to ascertain if the sample, which has lithological characteristics of the Coen Metamorphic Group, is part of the same unit or, has late Mesoproterozoic to Neoproterozoic zircons that are diagnostic of the Sefton Metamorphics that outcrop to the north in the Iron Range Province. Metamorphic age determinations from this sample may provide information on the movement of the adjacent Yintjingga fault zone which is considered to be a northern splay of the Palmer River Fault zone that separates the Proterozoic North Australian Craton from the late Neoproterozoic to Paleozoic Thomson Orogen and Paleozoic Hodgkinson Province to the east (Wellman, 1995). The sample was collected from a scree slope of large boulders along a track to the south of Lockhart River (~35 km south of Nundah Homestead). The sampled specimen comprises garnet-biotite-sillimanite gneiss. Large garnets (up to 5 cm in hand sample) are cracked and infilled with fine biotite as well as a fine matrix of white mica and sillimanite.","SAMPLING_FEATURE_NAME":"DBCY051","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS601617","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Savannah Province","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.3808254319,"LONG_GDA94":143.4370425154,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73387","AGE_REF":"Lewis, C.J., Dhnaram, C.R., Brown, D.D., Bultitude, R.J., Lisitsin, V.A., 2021. Summary of results. Joint GSQ-GA geochronology project: Georgetown, Coen and Cairns regions, 2016-2017. Queensland Geological Record, 2021/05, 62.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr130514","AGE_ENTRY_DATE":"2021-08-10","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8225","geometry":{"type":"Point","coordinates":[142.97276022,-13.10347793]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8225,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306984","IGSN":"10273/AU2306984","SAMPLENO":2306984,"SAMPLE_ID":"DBCY064C","AGE_MA":417,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.19,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6314","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":23294,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23294","STRAT_UNIT_NAME":"Yarraden Schist","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This sample was collected from the northern part of the Archer River Shear Zone to the west of the Portland Roads road where it outcrops on the top of a low ridge. It consists of light brown, folded, medium-grained sillimanite schist with relict cordierite. The main fabric of the rock is defined by bands of recrystallised quartz with complex grain boundaries, minor biotite and bands of muscovite and sillimanite that dominantly occur as coarse flakes with some finer aggregates of mica. The micaceous bands are commonly folded and appear to have accommodated most of the strain. Secondary hematite is also common. This unit was previously mapped as a part of the Sefton Metamorphics by Willmott et al. (1977), however, it is lithologically similar to the Yarraden Schist and has been updated in new GSQ mapping.","SAMPLING_FEATURE_NAME":"DBCY064C","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598117","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Block","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.1034779267,"LONG_GDA94":142.972760218,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample 2306984/DBCY064C was collected from the northern part of the Archer River Shear Zone to the west of the Portland Road where it outcrops on the top of a low ridge.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72983","AGE_REF":"Cross, A.J., Dhnaram, C., Lisitsin, V., Bultitude, R.J., Brown, D.D., Purdy, D.J., Von Gnielinski, F., 2019, Summary of results. Joint GSQ-GA geochronology project: Cairns, Cape York and Georgetown regions, 2015-2016. Queensland Geological Record, 2019/01.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr114904","AGE_ENTRY_DATE":"2021-02-04","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8221","geometry":{"type":"Point","coordinates":[143.07641044,-13.33632984]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8221,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306985","IGSN":"10273/AU2306985","SAMPLENO":2306985,"SAMPLE_ID":"DBCY043","AGE_MA":425,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.2,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6314","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":22209,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22209","STRAT_UNIT_NAME":"Lochs Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Biotite gneiss associated with pegmatitic sweats and pods. Located to the north of the Archer River Quarry. Detrital inheritance from this sample would be useful to establish a link with the Sefton metamorphics or for comparison. Sample 2306985/DBCY043 consists of medium grained biotite quartz gneiss with rare sillimanite and pods of quartz muscovite pegmatite. The texture of the rock is defined by bands of quartz and feldspar with complex grain boundaries and layers of aligned euhedral flakes of biotite and some patches of fine muscovite with sillimanite. Quartz is commonly recrystallised.","SAMPLING_FEATURE_NAME":"DBCY043","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598118","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Block","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.3363298408,"LONG_GDA94":143.0764104406,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Sample 2306985/DBCY043 is from the upper reaches of Wrights Creek, part of the Archer River Shear Zone which is a sigmoidal northern extension parallel with the Coen Shear Zone to the south.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72983","AGE_REF":"Cross, A.J., Dhnaram, C., Lisitsin, V., Bultitude, R.J., Brown, D.D., Purdy, D.J., Von Gnielinski, F., 2019, Summary of results. Joint GSQ-GA geochronology project: Cairns, Cape York and Georgetown regions, 2015-2016. Queensland Geological Record, 2019/01.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr114904","AGE_ENTRY_DATE":"2021-02-04","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1590","geometry":{"type":"Point","coordinates":[136.0507894,-22.72842203]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1590,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169918","IGSN":"10273/AU2169918","SAMPLENO":2169918,"SAMPLE_ID":"HU13EEB139B","AGE_MA":461,"AGE_MA_UNCERTAINTY":25,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.9,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6274","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":80345,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU80345","STRAT_UNIT_NAME":"Mascotte Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Orthogneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of equigranular to weakly porphyritic orthogneiss was collected from a site approximately 1.65 km west-southwest of Bonya Mine in northwestern JERVOIS RANGE. It is distinguished by well-developed centimetre-scale compositional banding with alternating layers of fine-grained granoblastic quartz and coarse-grained plagioclase and K-feldspar which are commonly partially, to wholly, saussuritised. Biotite comprises approximately 5% of the mineral mode and is largely altered to chlorite. Accessory minerals include abundant fine-grained magnetite and epidote. The gneiss is interpreted to have an igneous protolith of monzogranitic composition. This lithology is one of a variety of gneisses (and granites) currently assigned as part of the Mascotte Gneiss Complex on HUCKITTA (Freeman 1986). The Mascotte Gneiss Complex (Shaw et al 1984) has been interpreted to underlie the Bonya Schist with a transitional contact, and may form part of the same unit, but with a higher proportion of metaigneous rock. The Bonya Schist has a reported maximum depositional age of 1807 +/- 17 Ma (Claoue-Long and Hoatson 2005). The Complex is interpreted to have been intruded by the Jinka Granite (1714 +/- 3 Ma; Kositcin et al 2011).","SAMPLING_FEATURE_NAME":"HU13EEB139B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS575705","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7284220251,"LONG_GDA94":136.0507893982,"ELEV_M_AHD":424,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69794","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., 2014. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2013-June 2014. Northern Territory Geological Survey Record, 2014-008, 30p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82469","AGE_ENTRY_DATE":"2014-12-19","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1591","geometry":{"type":"Point","coordinates":[136.0507894,-22.72842203]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1591,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169918","IGSN":"10273/AU2169918","SAMPLENO":2169918,"SAMPLE_ID":"HU13EEB139B","AGE_MA":1735.7,"AGE_MA_UNCERTAINTY":6.6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.66,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6274","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":80345,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU80345","STRAT_UNIT_NAME":"Mascotte Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Unnamed Orthogneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of equigranular to weakly porphyritic orthogneiss was collected from a site approximately 1.65 km west-southwest of Bonya Mine in northwestern JERVOIS RANGE. It is distinguished by well-developed centimetre-scale compositional banding with alternating layers of fine-grained granoblastic quartz and coarse-grained plagioclase and K-feldspar which are commonly partially, to wholly, saussuritised. Biotite comprises approximately 5% of the mineral mode and is largely altered to chlorite. Accessory minerals include abundant fine-grained magnetite and epidote. The gneiss is interpreted to have an igneous protolith of monzogranitic composition. This lithology is one of a variety of gneisses (and granites) currently assigned as part of the Mascotte Gneiss Complex on HUCKITTA (Freeman 1986). The Mascotte Gneiss Complex (Shaw et al 1984) has been interpreted to underlie the Bonya Schist with a transitional contact, and may form part of the same unit, but with a higher proportion of metaigneous rock. The Bonya Schist has a reported maximum depositional age of 1807 +/- 17 Ma (Claoue-Long and Hoatson 2005). The Complex is interpreted to have been intruded by the Jinka Granite (1714 +/- 3 Ma; Kositcin et al 2011).","SAMPLING_FEATURE_NAME":"HU13EEB139B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS575705","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.7284220251,"LONG_GDA94":136.0507893982,"ELEV_M_AHD":424,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69794","AGE_REF":"Kositcin, N., Beyer, E.E., Whelan, J.A., 2014. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2013-June 2014. Northern Territory Geological Survey Record, 2014-008, 30p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82469","AGE_ENTRY_DATE":"2014-12-19","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13290","geometry":{"type":"Point","coordinates":[139.30665282,-21.80932211]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13290,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2678682","IGSN":"10273/AU2678682","SAMPLENO":2678682,"SAMPLE_ID":"BB5685","AGE_MA":1740,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"asymmetric 95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"median","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6385","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism. Robust median 95% confidence intervals reported as +9/-5 Ma.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":24510,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24510","STRAT_UNIT_NAME":"Sulieman Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Sulieman Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"BB5685 was collected from abundant outcrop on a prominent ridge up to ~15 m above the surrounding plain. It comprises dark grey, slightly uneven-grained, leucocratic feldspathic gneiss characterised by fine banding, and could be either a metarhyolite or a leucogranite. It contains a black mineral (possibly magnetite) as a relatively abundant minor component. The unit is cut by sparse, scattered pegmatite veins up to ~1.5 m thick. It is oxidised, with the average of 11 magnetic susceptibility readings being 39.5 x 10-3 SI units. In thin section, the rock is fine- to medium-grained (ranges from ~0.3 mm to 3 mm; average ~1 mm), and modal proportions are ~40% quartz, ~30% K-feldspar, ~25% plagioclase, ~3% biotite, ~1% muscovite, ~1% opaque oxide minerals. Anhedral quartz grains (with undulose extinction) are relatively common and relatively large. K-feldspar (microcline) is more abundant than plagioclase, mainly perfectly fresh, and features very well-developed cross-hatched twinning. Plagioclase grains are commonly slightly to moderately altered to sericite and fine-grained muscovite. Biotite is more abundant than muscovite. Minor but relatively common opaque oxide minerals are almost certainly magnetite in view of the high magnetic susceptibility. The rock also contains traces of allanite, myrmekite and zircon (as relatively coarse grains), as well as rarer titanite (generally associated with and/or partly rimming opaque oxide minerals; more rarely as discrete grains) and secondary calcite.","SAMPLING_FEATURE_NAME":"BB5685","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS625702","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.8093221112,"LONG_GDA94":139.3066528152,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Bultitude, R.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73568","AGE_REF":"Lewis, C.J., Bultitude, R.J., Hutton, L.J., Waltenberg, K., Armstrong, R.A., Evans, N.J., 2018. Unravelling the pre-1860-1850 Ma 'basement' history of the Mount Isa Inlier. Abstract 142, Australian Geoscience Council Convention, 14-18 October 2018. Australian Geoscience Council Convention, 142, 141p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/120990","AGE_ENTRY_DATE":"2022-08-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4067","geometry":{"type":"Point","coordinates":[132.23728507,-31.80583267]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4067,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2231430","IGSN":"10273/AU2231430","SAMPLENO":2231430,"SAMPLE_ID":"R2115501","AGE_MA":1564,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":29,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6299","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"St Peter Suite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed basic igneous rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R2115501 is a metagabbro that is representative of the mafic gneiss in the upper portion of drill hole Nundroo 2 (Fowler Domain, Gawler Craton). In thin section, this sample displays a mainly massive, equigranular granoblastic metamorphic texture. An indistinct lamination is defined by discontinuous, poorly-defined aggregates of plagioclase, hornblende and pyroxene grains. Plagioclase is moderately abundant, forming equant anhedral grains mostly 0.4 mm in size. Clinopyroxene occurs in moderate amount as equant anhedral grains 0.4-0.8 mm in size. Orthopyroxene occurs in lesser amount as smaller equant pleochroic pinkish anhedral grains 0.2-0.4 mm in size. Hornblende occurs throughout the rock as small anhedral grains mostly 0.4 mm in size. This sample is considered to have formed as a basic protolith, possibly a basic igneous rock, but all primary minerals and textures have been destroyed by complete recrystallisation in response to high-grade regional metamorphism in the lower granulite facies. This generated the granoblastic metamorphic assemblage of plagioclase-clinopyroxene-orthopyroxene-hornblende + trace opaques. The sharp grain contacts and even grain size supports the interpretation that all minerals formed synchronously as part of the same assemblage. The minerals responded to a weak directed stress regime by producing an indistinct lamination defined by polycrystalline aggregates of plagioclase, pyroxene and hornblende that are aligned in an indistinct metamorphic structure.","SAMPLING_FEATURE_NAME":"Nundroo 2 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595299","BOREHOLE_TOP_DEPTH_M":124,"BOREHOLE_BASE_DEPTH_M":126,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.8058326721,"LONG_GDA94":132.2372850706,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70778","AGE_REF":"Jagodzinski, E.A., Reid, A., 2016. U-Pb geochronological data from drill holes Nundroo 3 DDH and Nundroo 2 DDH, Fowler Domain, western Gawler Craton. Geological Survey of South Australia. Report Book, 2016/00010, 33p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011609","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2024-04-29"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8223","geometry":{"type":"Point","coordinates":[143.14858892,-13.21806936]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8223,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306983","IGSN":"10273/AU2306983","SAMPLENO":2306983,"SAMPLE_ID":"DBCY075","AGE_MA":426,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.17,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6314","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":23294,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23294","STRAT_UNIT_NAME":"Yarraden Schist","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The unit that this sample (2306983/DBCY075) was collected from was originally mapped as Sefton Metamorphics by Willmott et al. (1973). It occurs as a screen associated with the intrusion of an un-named granite of the Early Devonian, Flyspeck Supersuite. Outcrop at the sample site is poor and consists of schist with veins of pegmatite and gneiss and occurs as subcrop. Sample 2306983/DBCY075 is a light-brown medium-grained quartz biotite sillimanite schist. The dominant fabric is defined by recrystallised quartz and bands of coarse biotite and muscovite with fine acicular sillimanite. Hematite staining is common at grain boundaries.","SAMPLING_FEATURE_NAME":"DBCY075","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598116","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Block","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.2180693573,"LONG_GDA94":143.1485889173,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Fine grained quartz muscovite schist from south of the William Thomson Range.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72983","AGE_REF":"Cross, A.J., Dhnaram, C., Lisitsin, V., Bultitude, R.J., Brown, D.D., Purdy, D.J., Von Gnielinski, F., 2019, Summary of results. Joint GSQ-GA geochronology project: Cairns, Cape York and Georgetown regions, 2015-2016. Queensland Geological Record, 2019/01.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr114904","AGE_ENTRY_DATE":"2021-02-04","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4021","geometry":{"type":"Point","coordinates":[136.26498045,-22.8998173]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4021,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2179866","IGSN":"10273/AU2179866","SAMPLENO":2179866,"SAMPLE_ID":"HU14JAW433","AGE_MA":1749,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.06,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6287","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":79232,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79232","STRAT_UNIT_NAME":"Denara Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Denara orthogneiss is one of the more voluminous intrusions in the Jervois Range 100k mapsheet area, dominating the southern half of the mapsheet area. It comprises a strongly foliated and compositionally layered migmatite with melanosomes comprising biotite-plagioclase-quartz +/- garnet and leucocratic layers generally comprising plagioclase-quartz with occasional K-feldspar and biotite. Leucocratic layers are typically folded with the melanosome foliation; it is hypothesised that melt crystallisation occurred prior to deformation. Sub-mm- and cm-scale leucosomes with peritectic phases including pyroxene are interpreted to represent sites of melt formation (Reno et al 2015). Zircons from an unnamed gneissic granite (GA Sample ID: 2009087001; Kositcin et al 2011), an accumulation of leucocratic material interpreted to have been derived from partial melting in this migmatite records a magmatic crystallisation age of 1779 +/- 3 Ma, with metamorphic rims at 1744 +/- 4 Ma (Kositcin et al 2011). Sample HU14JAW433 is interpreted as a potential paleosome of this migmatite unit, and preserves the least amount of migmatisation observed in outcrops of the Denara orthogneiss.","SAMPLING_FEATURE_NAME":"HU14JAW433","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578608","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.8998172966,"LONG_GDA94":136.2649804489,"ELEV_M_AHD":328,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70303","AGE_REF":"Kositcin, N., Reno, B.L., Whelan, J.A., 2015. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2014-June 2015. Northern Territory Geological Survey Record, 2015-007, 26p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82476","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4018","geometry":{"type":"Point","coordinates":[136.16022025,-22.69195082]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4018,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2179867","IGSN":"10273/AU2179867","SAMPLENO":2179867,"SAMPLE_ID":"HU13BLR049Z","AGE_MA":1765,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.71,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6287","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28387,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28387","STRAT_UNIT_NAME":"Bonya Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU13BLR049z is a compositionally layered calc-silicate para-amphibolite comprising cm-scale bands of alternating hornblende-rich and plagioclase-rich layers. This lithology is a unit of the Bonya Metamorphics interpreted to have a mixed chemical-clastic sedimentary protolith that overlies, and is stratigraphically continuous with, siliciclastic schists of the Bonya Metamorphics. Samples from the Bonya Metamorphics have been dated previously. Claoue-Long and Hoatson (2005) recorded a SHRIMP U-Pb zircon upper intercept age of 1807 +/- 17 Ma and an isotopic resetting age of ca 478 Ma for an interpreted volcaniclastic unit, of which the former may represent an igneous crystallisation age. A metasandstone sample from the same sequence yielded a maximum depositional age of 1807 +/- 21 Ma with a dominant provenance mode at ca 1846 Ma, and less dominant modes at ca 2000 Ma, ca 2520 Ma and ca 2555 Ma (Kositcin et al 2014). The relationship between the sample of Claoue-Long and Hoatson (2005) and outcrops of Bonya Metamorphics in the Bonya Hills to the west are not clear and therefore HU13BLR049z was collected from an area where the unit is better defined.","SAMPLING_FEATURE_NAME":"HU13BLR049Z","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578609","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6919508155,"LONG_GDA94":136.1602202477,"ELEV_M_AHD":387,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70303","AGE_REF":"Kositcin, N., Reno, B.L., Whelan, J.A., 2015. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2014-June 2015. Northern Territory Geological Survey Record, 2015-007, 26p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82476","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13294","geometry":{"type":"Point","coordinates":[139.63287805,-20.92429495]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13294,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2678683","IGSN":"10273/AU2678683","SAMPLENO":2678683,"SAMPLE_ID":"BB5674","AGE_MA":469.3,"AGE_MA_UNCERTAINTY":5.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6385","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Early Paleozoic isotopic resetting of sun-magmatic (1863.7 +/- 5.0 Ma) zircons.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":76887,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU76887","STRAT_UNIT_NAME":"Kurbayia Metamorphic Complex","INFORMAL_UNIT_NAME":"Kurbayia Metamorphic Complex/grt","UNIT_NAME_SOURCE":"Kurbayia Metamorphic Complex (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This unit is well exposed, and BB5674 was collected from an area of large boulders and pavements on the SE slope of hill. This meta-granodiorite is extensively recrystallised, with relict quartz, biotite, and feldspar grains. It is foliated, but not as gneissic as outcrops examined elsewhere. It hosts scattered mafic inclusions, and is cut by thin (up to ~30 cm) dykes of fine- to medium-grained leucogranite. In thin section, this rock is a deformed and metamorphosed fine- to medium-grained biotite granodiorite [average ~1.5 mm; ranging from ~0.3 mm (recrystallised quartz) to ~3 mm (relict feldspars)], though a gneissic texture is not obvious. Modal proportions are ~37% plagioclase, ~22% K-feldspar, ~25% quartz, ~15% biotite. K-feldspar is unaltered microcline microperthite. Plagioclase is generally slightly to moderately altered to sericite and/or muscovite, and epidote is associated, although it is not clear whether epidote is an alteration product or inclusions. Quartz grains are recrystallised to aggregates of smaller grains with boundaries ranging from straight to highly intricate. Polygonal grains are quite common. Biotite too is relatively common, and generally occurs as aggregates of several grains. It is extensively recrystallised, tends to be concentrated in irregular lenticles (not well developed), and hosts sparse tiny inclusions of zircon (pleochroic haloes) and apatite. Epidote is minor but widespread as well-formed euhedral-subhedral grains, commonly associated with biotite and plagioclase, and possibly of magmatic origin. Some have cores of altered allanite. Small euhedral-subhedral grains are common in some plagioclase grains, and some of these inclusions also display cores of altered allanite. This rock also contains traces of primary titanite (pleochroic from pale brown to red-brown), and myrmekite.","SAMPLING_FEATURE_NAME":"BB5674","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS625703","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kalkadoon-Leichhardt Domain","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.9242949549,"LONG_GDA94":139.6328780485,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Bultitude, R.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73568","AGE_REF":"Lewis, C.J., Bultitude, R.J., Hutton, L.J., Waltenberg, K., Armstrong, R.A., Evans, N.J., 2018. Unravelling the pre-1860-1850 Ma 'basement' history of the Mount Isa Inlier. Abstract 142, Australian Geoscience Council Convention, 14-18 October 2018. Australian Geoscience Council Convention, 142, 141p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/120990","AGE_ENTRY_DATE":"2022-08-02","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4066","geometry":{"type":"Point","coordinates":[132.23728507,-31.80583267]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4066,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2231431","IGSN":"10273/AU2231431","SAMPLENO":2231431,"SAMPLE_ID":"R2115514","AGE_MA":1574,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.01,"NUMBER_OF_ANALYSES":39,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6299","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"St Peter Suite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample R2115514 is a garnet-bearing quartzo-feldspathic gneiss that is representative of the pink-coloured quartz-feldspar-biotite-garnet gneiss in the lower portion of drill hole Nundroo 2 (Fowler Domain, Gawler Craton).This felsic gneiss was interpreted by Daly and Martin (1989) to have been intruded by mafic dykes or sills that are now present as concordant mafic gneiss bands within the core. This sample was taken in order to determine timing of emplacement and metamorphism of the garnetiferous gneiss. In thin section, this sample displays a foliated granoblastic metamorphic texture. Plagioclase is abundant, forming equant anhedral grains mostly 0.4-0.8 mm in size. K-feldspar occurs in significant amount as anhedral grains similar in size to plagioclase. Quartz forms small to large anhedral grains. Smaller grains 0.2-0.4 mm in size lie at contacts of plagioclase and K-feldspar throughout much of the rock. Biotite occurs in moderate amount as small uniformly sized well-shaped plates 0.2-0.4 mm long. Garnet is present in minor amount as irregularly scattered equant grains and subhedral crystals 0.4-1.5 mm in size. Sillimanite occurs in one larger garnet grain as numerous small acicular colourless inclusions aligned in the foliation, and also as trace small prisms in some smaller garnet grains. This sample is considered to have initially crystallised as a granodioritic intrusive igneous rock, but has recrystallised under high amphibolite facies P-T conditions producing the metamorphic assemblage of plagioclase-K-feldspar-quartz-biotite-garnet-sillimanite-opaques. The metamorphic structure is defined by aligned biotite flakes and subparallel indistinct felsic bands composed of coarser-grained quartz-K-feldspar-plagioclase, likely representing metamorphic segregation bands.","SAMPLING_FEATURE_NAME":"Nundroo 2 DDH","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH595299","BOREHOLE_TOP_DEPTH_M":321.8,"BOREHOLE_BASE_DEPTH_M":323,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.8058326721,"LONG_GDA94":132.2372850706,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2015-02-11","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70778","AGE_REF":"Jagodzinski, E.A., Reid, A., 2016. U-Pb geochronological data from drill holes Nundroo 3 DDH and Nundroo 2 DDH, Fowler Domain, western Gawler Craton. Geological Survey of South Australia. Report Book, 2016/00010, 33p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011609","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2024-04-29"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8242","geometry":{"type":"Point","coordinates":[143.02228753,-13.02481054]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8242,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2306988","IGSN":"10273/AU2306988","SAMPLENO":2306988,"SAMPLE_ID":"DPCY031","AGE_MA":1585.1,"AGE_MA_UNCERTAINTY":4.4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.49,"NUMBER_OF_ANALYSES":29,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6315","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":79732,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU79732","STRAT_UNIT_NAME":"Choc-a-block Orthogneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Site DPCY031 is located 60 m east of Portland Road and 60 m North of Choc-a-bloc Creek in the Mangkuma Land Trust area. The sample is a medium to coarse-grained generally allotriomorphic, equigranular foliated biotite granitic gneiss and is currently mapped as a part of the Kintore Granite. It is comprised of coarse subhedral sericitised potassium feldspar (microcline), anhedral quartz, some recrystallised quartz (granoblastic, honeycomb texture in parts), foxy brown biotite (some altered to muscovite), fine muscovite with minor chlorite, zircon in green hornblende associated with muscovite patches and small red titanite crystals associated with amphibole muscovite alteration. It was sampled for SHRIMP U-Pb geochronology as its pronounced foliation contrasts markedly with other local, outcropping examples of the Kintore Granite.","SAMPLING_FEATURE_NAME":"DPCY031","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598121","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Coen Block","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.0248105367,"LONG_GDA94":143.0222875322,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"GSQ site DPCY031 is located 60 m east of Portland Road and 60 m North of Choc-a-bloc Creek in the Mangkuma Land Trust area.","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72983","AGE_REF":"Cross, A.J., Dhnaram, C., Lisitsin, V., Bultitude, R.J., Brown, D.D., Purdy, D.J., Von Gnielinski, F., 2019, Summary of results. Joint GSQ-GA geochronology project: Cairns, Cape York and Georgetown regions, 2015-2016. Queensland Geological Record, 2019/01.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr114904","AGE_ENTRY_DATE":"2021-02-08","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1156","geometry":{"type":"Point","coordinates":[132.91666537,-12.68333702]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1156,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2550592","IGSN":"10273/AU2550592","SAMPLENO":2550592,"SAMPLE_ID":"730-376.5","AGE_MA":1800,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.98,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"Z4907","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of hydrothermal event","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Crystallisation during hydrothermal alteration Age range 1814-1753 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":77490,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU77490","STRAT_UNIT_NAME":"Upper Mine Sequence","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Upper Mine Sequence","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample 730-376.5 occurs within a ~2 m wide intervalof intensely white-mica and chlorite-altered quartz-biotite-K-feldspar-plagioclase-hornblende schist, about 80 m above the main U orebody. This zone of intense alteration occurs within a broader zone of weak to moderate intense chlorite-white-mica alteration which grades downwards into intense chlorite alteration associated with U mineralisation.","SAMPLING_FEATURE_NAME":"S3PD730","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH513457","BOREHOLE_TOP_DEPTH_M":376.5,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Pine Creek Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.6833370203,"LONG_GDA94":132.9166653697,"ELEV_M_AHD":24,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2009-08-25","SAMPLE_ORIGINATOR":"Skirrow, R.G.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69577","AGE_REF":"Mercadier, J., Skirrow, R.G., Cross, A.J., 2013. Uranium and gold deposits in the Pine Creek Orogen (North Australian Craton): A link at 1.8 Ga?. Precambrian Research, 238, 111-119.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2013.10.001","AGE_ENTRY_DATE":"2016-04-02","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1151","geometry":{"type":"Point","coordinates":[136.05999992,-13.25765747]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1151,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2307042","IGSN":"10273/AU2307042","SAMPLENO":2307042,"SAMPLE_ID":"BM15JAW033","AGE_MA":1877,"AGE_MA_UNCERTAINTY":17,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6311","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"interpreted to reflect the timing of metamorphic zircon growth","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of unnamed biotite gneiss was collected from the base of Mount Grindall approximately 19 km southwest of Baniyala in Blue Mud Bay. This area was previously mapped as undivided Bradshaw Complex (Rawlings et al 1997) and high-grade rocks were tentatively correlated with Melville Bay Metamorphics exposed in GOVE on the basis of lithological similarities. No previous dating has been undertaken in this area. At the sample location, platform and beach exposures comprise biotite gneiss which is locally garnet-sillimanite bearing and contains rare rafts or mega-selvages (up to 3 m wide) of cordierite-biotite ± sillimanite rock. The steep- to sub-vertical gneissosity is variably developed and appears to grade from true gneiss into weakly foliated granite. Muscovite-tourmaline pegmatite intrudes the gneiss and a shallowly south-southwest dipping, relatively low-grade metasedimentary succession which may unconformably overly the gneiss, though no direct contact was observed in the field. All units are unconformably overlain by the Coast Range Sandstone. The sampled lithology comprises relatively homogeneous, fine- to medium-grained biotite gneiss with rare garnet and biotite-sillimanite clots. Gneissic layering is characterised by centimetre scale biotite-rich and feldspar-rich bands. The gneissosity is overprinted by rare tight folds which plunge shallowly west. Rare quartzite xenolithis are aligned in gneissosity.","SAMPLING_FEATURE_NAME":"BM15JAW033","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS598523","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arnhem Province","GEOLOGICAL_REGION_NAME":"McArthur Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-13.2576574677,"LONG_GDA94":136.0599999222,"ELEV_M_AHD":null,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71605","AGE_REF":"Kositcin, N., Whelan, J.A., Reno, B.L., Kraus, S., Beyer, E.E., 2018. Summary of results: NTGS-GA geochronology project: Arnhem Province, July 2014-June 2016. Northern Territory Geological Survey Record, 2017-008, 37p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87054","AGE_ENTRY_DATE":"2017-11-08","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9701","geometry":{"type":"Point","coordinates":[143.43704252,-13.38082543]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9701,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2614016","IGSN":"10273/AU2614016","SAMPLENO":2614016,"SAMPLE_ID":"DBCY051","AGE_MA":1421,"AGE_MA_UNCERTAINTY":28,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6338","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":4294,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4294","STRAT_UNIT_NAME":"Coen Metamorphic Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Coen Metamorphic Group covers the northern extent of the Savannah Province and is in contact with the Iron Range Province and the Newberry Metamorphic Group of the Etheridge Province. The purpose of analysing DBCY051/2614016 is to ascertain if the sample, which has lithological characteristics of the Coen Metamorphic Group, is part of the same unit or, has late Mesoproterozoic to Neoproterozoic zircons that are diagnostic of the Sefton Metamorphics that outcrop to the north in the Iron Range Province. Metamorphic age determinations from this sample may provide information on the movement of the adjacent Yintjingga fault zone which is considered to be a northern splay of the Palmer River Fault zone that separates the Proterozoic North Australian Craton from the late Neoproterozoic to Paleozoic Thomson Orogen and Paleozoic Hodgkinson Province to the east (Wellman, 1995). The sample was collected from a scree slope of large boulders along a track to the south of Lockhart River (~35 km south of Nundah Homestead). The sampled specimen comprises garnet-biotite-sillimanite gneiss. Large garnets (up to 5 cm in hand sample) are cracked and infilled with fine biotite as well as a fine matrix of white mica and sillimanite.","SAMPLING_FEATURE_NAME":"DBCY051","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS601617","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Savannah Province","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.3808254319,"LONG_GDA94":143.4370425154,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73387","AGE_REF":"Lewis, C.J., Dhnaram, C.R., Brown, D.D., Bultitude, R.J., Lisitsin, V.A., 2021. Summary of results. Joint GSQ-GA geochronology project: Georgetown, Coen and Cairns regions, 2016-2017. Queensland Geological Record, 2021/05, 62.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr130514","AGE_ENTRY_DATE":"2021-08-10","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9702","geometry":{"type":"Point","coordinates":[143.43704252,-13.38082543]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9702,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2614016","IGSN":"10273/AU2614016","SAMPLENO":2614016,"SAMPLE_ID":"DBCY051","AGE_MA":428.9,"AGE_MA_UNCERTAINTY":3.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.35,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6338","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":4294,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4294","STRAT_UNIT_NAME":"Coen Metamorphic Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Coen Metamorphic Group covers the northern extent of the Savannah Province and is in contact with the Iron Range Province and the Newberry Metamorphic Group of the Etheridge Province. The purpose of analysing DBCY051/2614016 is to ascertain if the sample, which has lithological characteristics of the Coen Metamorphic Group, is part of the same unit or, has late Mesoproterozoic to Neoproterozoic zircons that are diagnostic of the Sefton Metamorphics that outcrop to the north in the Iron Range Province. Metamorphic age determinations from this sample may provide information on the movement of the adjacent Yintjingga fault zone which is considered to be a northern splay of the Palmer River Fault zone that separates the Proterozoic North Australian Craton from the late Neoproterozoic to Paleozoic Thomson Orogen and Paleozoic Hodgkinson Province to the east (Wellman, 1995). The sample was collected from a scree slope of large boulders along a track to the south of Lockhart River (~35 km south of Nundah Homestead). The sampled specimen comprises garnet-biotite-sillimanite gneiss. Large garnets (up to 5 cm in hand sample) are cracked and infilled with fine biotite as well as a fine matrix of white mica and sillimanite.","SAMPLING_FEATURE_NAME":"DBCY051","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS601617","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Savannah Province","GEOLOGICAL_REGION_NAME":"Coen Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-13.3808254319,"LONG_GDA94":143.4370425154,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of Queensland (GSQ)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73387","AGE_REF":"Lewis, C.J., Dhnaram, C.R., Brown, D.D., Bultitude, R.J., Lisitsin, V.A., 2021. Summary of results. Joint GSQ-GA geochronology project: Georgetown, Coen and Cairns regions, 2016-2017. Queensland Geological Record, 2021/05, 62.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr130514","AGE_ENTRY_DATE":"2021-08-10","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4191","geometry":{"type":"Point","coordinates":[137.339515,-32.7956228]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4191,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2169191","IGSN":"10273/AU2169191","SAMPLENO":2169191,"SAMPLE_ID":"R2017712","AGE_MA":405,"AGE_MA_UNCERTAINTY":220,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.6,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Zircon","MOUNT_ID":"GA6271","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of isotopic resetting","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"This unnamed granite occurs on Roopena Station, ~ 40 km W of Port Augusta, on northern Eyre Peninsula.  Although no contacts are observed the unnamed granite is inferred to intrude the Broadview Schist which crops out in close proximity to the granite. In this locality the Broadview Schist consists of a fine-grained finely-laminated light to dark grey to pink-brown meta-sandstone composed of recrystallised quartz and lesser mica. The granite and surrounding Broadview Schist appear to lie within a magnetic-low of undeformed rock wrapped on either side by a magnetic-high mylonite. Sample 2017712 is a pink medium-grained equigranular granite composed of feldspar, quartz, biotite and tourmaline and is weakly foliated. One km to the south of the sample location an outcrop of gneissic granite occurs within the Roopena Shear Zone. This granite gneiss is similar in composition to sample 2017712, a moderate to orange-pink medium-grained granite composed of quartz, feldspar and biotite, with a gneissic fabric defined by quartz ribbons, and may be part of the same intrusion. The composition of this granite is dominated by potassium feldspar and quartz, with only minor plagioclase and biotite and trace tourmaline, opaques and zircon. The texture of the granite under the microscope is weakly gneissic, with layering defined by alternating feldspar and granoblastic quartz. Potassium feldspar crystals range in size from 50 to 350 micron, commonly exhibit tartan cross hatching, and are weakly sericitised. Plagioclase crystals are typically 50 to 100 micron and exhibit simple twinning. Opaques and tourmaline occur intergranular to feldspar and quartz.","SAMPLING_FEATURE_NAME":"R2017712","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS575539","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":"Gawler Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7956228,"LONG_GDA94":137.339515,"ELEV_M_AHD":116,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2014-01-17","SAMPLE_ORIGINATOR":"Jagodzinski, E.A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71362","AGE_REF":"Jagodzinski, E.A., McAvaney, S.O., 2017. SHRIMP U-Pb geochronology data for northern Eyre Peninsula, 2014-2016. Geological Survey of South Australia. Report Book, 2016/00001, 79p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20011601","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4019","geometry":{"type":"Point","coordinates":[136.16022025,-22.69195082]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4019,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2179867","IGSN":"10273/AU2179867","SAMPLENO":2179867,"SAMPLE_ID":"HU13BLR049Z","AGE_MA":1717,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.68,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6287","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":28387,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU28387","STRAT_UNIT_NAME":"Bonya Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary carbonate rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Sample HU13BLR049z is a compositionally layered calc-silicate para-amphibolite comprising cm-scale bands of alternating hornblende-rich and plagioclase-rich layers. This lithology is a unit of the Bonya Metamorphics interpreted to have a mixed chemical-clastic sedimentary protolith that overlies, and is stratigraphically continuous with, siliciclastic schists of the Bonya Metamorphics. Samples from the Bonya Metamorphics have been dated previously. Claoue-Long and Hoatson (2005) recorded a SHRIMP U-Pb zircon upper intercept age of 1807 +/- 17 Ma and an isotopic resetting age of ca 478 Ma for an interpreted volcaniclastic unit, of which the former may represent an igneous crystallisation age. A metasandstone sample from the same sequence yielded a maximum depositional age of 1807 +/- 21 Ma with a dominant provenance mode at ca 1846 Ma, and less dominant modes at ca 2000 Ma, ca 2520 Ma and ca 2555 Ma (Kositcin et al 2014). The relationship between the sample of Claoue-Long and Hoatson (2005) and outcrops of Bonya Metamorphics in the Bonya Hills to the west are not clear and therefore HU13BLR049z was collected from an area where the unit is better defined.","SAMPLING_FEATURE_NAME":"HU13BLR049Z","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578609","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Aileron Province","GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.6919508155,"LONG_GDA94":136.1602202477,"ELEV_M_AHD":387,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"70303","AGE_REF":"Kositcin, N., Reno, B.L., Whelan, J.A., 2015. Summary of results. Joint NTGS-GA geochronology project: Arunta Region, July 2014-June 2015. Northern Territory Geological Survey Record, 2015-007, 26p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82476","AGE_ENTRY_DATE":"2019-10-23","AGE_LAST_UPDATED":"2020-11-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1129","geometry":{"type":"Point","coordinates":[136.68752058,-12.1836575]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1129,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2180008","IGSN":"10273/AU2180008","SAMPLENO":2180008,"SAMPLE_ID":"GV14BLR010B","AGE_MA":1860,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.44,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6289","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"zircon growth during high grade metamorphism of the sedimentary protoliths to this migmatite","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":30958,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU30958","STRAT_UNIT_NAME":"Melville Bay Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Melville Bay Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"A sample of Melville Bay Metamorphics was taken from Wargarpunda Point to characterise the timing of metamorphism in the Arnhem Province. Sample GV14BLR010B is a garnet-biotite-plagioclase-quartz+/-cordierite granulite facies migmatite gneiss comprising metamorphosed interlayered mudstone-greywacke and sandstone. This particular sample is from a leucosome-dominated domain comprising intergrown, anhedral, 5-10 mm quartz-K-feldspar-plagioclase with up to 5% 1-5 mm anhedral elongate cordierite in equilibrium with the leucocratic matrix. Garnet up to 2-3 cm, interpreted as a peritectic phase that grew during the melt-forming reaction, occurs in the leucocratic matrix. Garnet includes sillimanite, cordierite, ilmenite, and pyrite, and is commonly mantled by a later phase of cordierite.","SAMPLING_FEATURE_NAME":"GV14BLR010B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS578929","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Arnhem Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-12.1836574997,"LONG_GDA94":136.6875205768,"ELEV_M_AHD":4,"ACCURACY_M":999,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71605","AGE_REF":"Kositcin, N., Whelan, J.A., Reno, B.L., Kraus, S., Beyer, E.E., 2018. Summary of results: NTGS-GA geochronology project: Arnhem Province, July 2014-June 2016. Northern Territory Geological Survey Record, 2017-008, 37p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87054","AGE_ENTRY_DATE":"2018-04-05","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13421","geometry":{"type":"Point","coordinates":[132.4521379,-31.39987069]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13421,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2666270","IGSN":"10273/AU2666270","SAMPLENO":2666270,"SAMPLE_ID":"R2322236","AGE_MA":1585,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.17,"NUMBER_OF_ANALYSES":19,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6352","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"felsic gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Drillhole FBD2 contains weakly to strongly foliated biotite-rich metasedimentary rocks. There are also narrow, coarse-grained, quartz-feldspar-rich pegmatite-like zones that have a transitional contact with the enclosing biotite-rich rock. In addition to weakly foliated zones there are also zones of moderate strain intensity, with shear bands that dissect the moderately altered sedimentary precursor. These shear bands are defined by muscovite and biotite. Sample R2322236 is representative of the foliated zones within the drillhole. It is a medium-grained rock comprising bands of quartz-plagioclase-K-feldspar-garnet interlayered with biotite, muscovite and sillimanite-rich bands. The banding of the quartzo-feldspathic domains and the mica-rich domains gives the rock the appearance of a pervasively foliated metagranite. The quartz in the quartzo-feldspathic microlithons comprises larger grains that are intergrown with feldspar and which are themselves partially to completely composed of subgrains. These subgrains have irregular subgrain boundaries due to dynamic recrystallisation. Undulose extinction of quartz subgrains is common. The plagioclase is almost completely altered to white mica. K-feldspar is less common that plagioclase, and where present shows undulose extinction and deformation of primary tartan twinning. Minor garnet is present and occurs as clusters of angular grains to around 500 microns in diameter. These garnet crystals may be fragments of earlier formed larger garnet crystals. None of these microgarnet crystals contain inclusions of other minerals. Biotite is green in colour and under cross polars shows a blue interference colours in places, which likely indicates the biotite is now partially, and in places completely, replaced by chlorite. Muscovite occurs intergrown with the biotite in the mica-rich microlithons and as a minor phase within the quartzo-feldspathic microlithons.","SAMPLING_FEATURE_NAME":"FBD2","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH606309","BOREHOLE_TOP_DEPTH_M":234.82,"BOREHOLE_BASE_DEPTH_M":236.7,"GEOLOGICAL_PROVINCE":"Fowler Domain","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.3998706914,"LONG_GDA94":132.4521379007,"ELEV_M_AHD":200,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2017-05-09","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73612","AGE_REF":"Jagodzinski, E.A., Reid, A., Gribbin, G., 2019. U-Pb geochronological data from the Fowler Domain, western Gawler Craton. Geological Survey of South Australia. Report Book, 2019/00018, 58p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2019d059057","AGE_ENTRY_DATE":"2022-11-16","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8713","geometry":{"type":"Point","coordinates":[146.31826197,-37.21567511]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8713,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370865","IGSN":"10273/AU7370865","SAMPLENO":7370865,"SAMPLE_ID":"CS9749a","AGE_MA":451.2,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not captured","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"single mineral isochron metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"SHRIMP-I and SHRIMP-II; MSWD=1.2; (Map sheet Buller south 8123-1-S: DU394808); Data-point error ellipses are at 68.3% confidence level.. From Phillips, 2012: These results compare with an imprecise U-Pb titanite age (450+23 Ma) from a Mount Wellington Fault Zone blueschist sample (CS9749); previous reported age: 450+/-23","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"blueschist facies rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS9749","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652004","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2156751134,"LONG_GDA94":146.3182619741,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24003","AGE_REF":"Spaggiari, C.V., Gray, D.R., Foster, D.A., Fanning, C.M., 2002. Occurrence and significance of blueschist in the southern Lachlan Orogen. Australian Journal of Earth Sciences, 49(2), 255-269.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2002.00915.x","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8714","geometry":{"type":"Point","coordinates":[146.31826197,-37.21567511]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8714,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370866","IGSN":"10273/AU7370866","SAMPLENO":7370866,"SAMPLE_ID":"CS9749b","AGE_MA":450,"AGE_MA_UNCERTAINTY":23,"AGE_CONFIDENCE_LEVEL":"not captured","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not captured","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Isochron metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Error ellipses are at 68.3% confidence level. MSWD = 1.2. Timing of melange formation. ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Undifferentiated mafic and ultramafic rocks","UNIT_NAME_SOURCE":"Undifferentiated mafic and ultramafic rocks","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS9749","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652004","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2156751134,"LONG_GDA94":146.3182619741,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24003","AGE_REF":"Spaggiari, C.V., Gray, D.R., Foster, D.A., Fanning, C.M., 2002. Occurrence and significance of blueschist in the southern Lachlan Orogen. Australian Journal of Earth Sciences, 49(2), 255-269.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2002.00915.x","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8663","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8663,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370805","IGSN":"10273/AU7370805","SAMPLENO":7370805,"SAMPLE_ID":"BE-8A_664.5M WRb","AGE_MA":390,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Whole rock analysis. Short plateau on a stair-step spectrum, interpreted as age of vein formation.. Previous age of 444 +/-2 Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age No plateau; Staircase spectrum;  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8869","geometry":{"type":"Point","coordinates":[143.71789952,-37.05820119]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8869,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371073","IGSN":"10273/AU7371073","SAMPLENO":7371073,"SAMPLE_ID":"MATH-01a","AGE_MA":368,"AGE_MA_UNCERTAINTY":3.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Dalhousie University, Canada","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Previous age of 366 +/-2 Ma (p, c.85%) by (REF_ID: 29527) BIERLEIN F. P., HUGHES M., DUNPHY J., MCKNIGHT S., REYNOLDS P. and WALDRON H. 2001d. Tectonic and economic implications of trace element, 40Ar/39 Ar and Sm-Nd data from mafic dykes associated with orogenic gold mineralisation in central Victoria, Australia. Lithos 58, 1-31. Recalculated age: Sigmoidal age spectrum; 88% of 39Ar; MSWD=1.5; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). The relationship between these dykes and other quartz vein associated gold mineralisation in the area is unknown.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MATH-01","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652119","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0582011865,"LONG_GDA94":143.7178995175,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Maryborough Telegraph","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8870","geometry":{"type":"Point","coordinates":[143.71789952,-37.05820119]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8870,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371076","IGSN":"10273/AU7371076","SAMPLENO":7371076,"SAMPLE_ID":"MATH-02b","AGE_MA":371.7,"AGE_MA_UNCERTAINTY":3.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Dalhousie University, Canada","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Previous age of 366 +/-2 Ma (p, c.85%) by (REF_ID: 29527) BIERLEIN F. P., HUGHES M., DUNPHY J., MCKNIGHT S., REYNOLDS P. and WALDRON H. 2001d. Tectonic and economic implications of trace element, 40Ar/39 Ar and Sm-Nd data from mafic dykes associated with orogenic gold mineralisation in central Victoria, Australia. Lithos 58, 1-31. Recalculated age: Sigmoidal age spectrum; 88% of 39Ar; MSWD=1.5; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). The relationship between these dykes and other quartz vein associated gold mineralisation in the area is unknown.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MATH-01","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652119","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0582011865,"LONG_GDA94":143.7178995175,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":"Maryborough Telegraph","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8340","geometry":{"type":"Point","coordinates":[144.24730003,-37.06150249]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8340,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370884","IGSN":"10273/AU7370884","SAMPLENO":7370884,"SAMPLE_ID":"DG84-18b","AGE_MA":425.1,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age, 60%; Well-defined plateau age gives time of crenulation and reactivation in hanging wall of Whitelaw Fault. Incorrectly labelled DG92-18 in Fig. A1 of Foster et al. 1999. Previous age 417 +/-2 Ma by (REF_ID: 29636) FOSTER, D.A., GRAY, D.R. and BUCHER, M., 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: Implications for the tectonic evolution of eastern Australia. Tectonics 18, pp. 452-485; Recalucated age Sigmoidal spectrum (65% of 39Ar; MSWD=0.8); We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group / Whitelaw Fault thrust sheet","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_DG84-18","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652013","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0615024878,"LONG_GDA94":144.2473000281,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8845","geometry":{"type":"Point","coordinates":[147.01637715,-36.74636011]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8845,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370885","IGSN":"10273/AU7370885","SAMPLENO":7370885,"SAMPLE_ID":"DG85-23","AGE_MA":439,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Records cleavage development during tight F1 folding.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":23907,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23907","STRAT_UNIT_NAME":"Pinnak Sandstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Pinnak Sandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"TABBERABBERA_DG85-23","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652014","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Tabberabbera Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Tabberabbera","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.7463601109,"LONG_GDA94":147.0163771477,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8665","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8665,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370807","IGSN":"10273/AU7370807","SAMPLENO":7370807,"SAMPLE_ID":"BE-8A_664.5M WRd","AGE_MA":395,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Whole rock analysis. Short plateau on a stair-step spectrum, interpreted as age of vein formation.. Previous age of 444 +/-2 Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age No plateau; Staircase spectrum;   We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8872","geometry":{"type":"Point","coordinates":[143.72476794,-37.07009191]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8872,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371077","IGSN":"10273/AU7371077","SAMPLENO":7371077,"SAMPLE_ID":"MATH-02c","AGE_MA":379.2,"AGE_MA_UNCERTAINTY":4.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Dalhousie University, Canada","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Location in original ref: 2 km south of Maryborough; Biotite separates from two hydrothermally altered dioritic dyke that host gold mineralisation;. Previous age of 374 +/-2 Ma (p, 96%) by (REF_ID: 29527) BIERLEIN F. P., HUGHES M., DUNPHY J., MCKNIGHT S., REYNOLDS P. and WALDRON H. 2001d. Tectonic and economic implications of trace element, 40Ar/39 Ar and Sm-Nd data from mafic dykes associated with orogenic gold mineralisation in central Victoria, Australia. Lithos 58, 1-31. Recalculated age:57% of 39Ar; MSWD=0.9; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). The relationship between these dykes and other quartz vein associated gold mineralisation in the area is unknown.\"","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MATH-02","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652120","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0700919143,"LONG_GDA94":143.7247679358,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8839","geometry":{"type":"Point","coordinates":[146.39589986,-37.38288861]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8839,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371178","IGSN":"10273/AU7371178","SAMPLENO":7371178,"SAMPLE_ID":"RH598","AGE_MA":404.8,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age records phase of deformation in decollement zone. Total fusion age is 411 +/- 6 Ma. Location: 146.408E, 37,458SPrevious age of 416 +/-4 Ma (m, 90%); 411 +/-6 (p)  by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: 85% 39 Ar; MSWD=0.6. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Phillips et al. notes sample id: RH598(=RM598?), however no explanation in text or in original ref of Foster et al. . No magmatic population. Inheritance about 500 Ma, and 413 Ma.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":21945,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21945","STRAT_UNIT_NAME":"Hardwicke Creek Rhyolite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Hardwicke Creek Rhyolite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_RH598","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652192","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3828886051,"LONG_GDA94":146.3958998645,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9478","geometry":{"type":"Point","coordinates":[146.39589986,-37.38288861]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9478,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371178","IGSN":"10273/AU7371178","SAMPLENO":7371178,"SAMPLE_ID":"RH598","AGE_MA":416,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: VG3600","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"deformation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":21945,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21945","STRAT_UNIT_NAME":"Hardwicke Creek Rhyolite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Rhyolite Creek","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_RH598","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652192","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3828886051,"LONG_GDA94":146.3958998645,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-04-27","AGE_LAST_UPDATED":"2021-10-12"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8840","geometry":{"type":"Point","coordinates":[146.39589986,-37.38288861]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8840,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371179","IGSN":"10273/AU7371179","SAMPLENO":7371179,"SAMPLE_ID":"RH598b","AGE_MA":408.5,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age records phase of deformation in decollement zone. Total fusion age is 411 +/- 6 Ma. Location: 146.408E, 37,458S. Previous age of 416 +/-4 Ma (m, 90%); 411 +/-6 (p)  by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: 85% 39 Ar; MSWD=0.6. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Phillips et al. notes sample id: RH598(=RM598?), however no explanation in text or in original ref of Foster et al. ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":21945,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21945","STRAT_UNIT_NAME":"Hardwicke Creek Rhyolite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Hardwicke Creek Rhyolite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_RH598","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652192","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3828886051,"LONG_GDA94":146.3958998645,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8495","geometry":{"type":"Point","coordinates":[146.55048468,-37.58634757]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8495,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370886","IGSN":"10273/AU7370886","SAMPLENO":7370886,"SAMPLE_ID":"DG86-58","AGE_MA":440,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent deformation maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Small fraction c.1-4% of larger white mica grains within the cleavage that may be residual detrital grains. Plateau age. 410 +/-3 Ma c.40% of gas released records max time of cleavage formation. Total fusion age is 413 +/- 3 Ma. Records early cleavage formation. Saddle-shaped spectrum suggests the error should be much greater, because of recoil. Comment from GEOVIC: the location given in Foster et al 1999 (Tectonics) in latitude and longitude puts this site too far north. Material sampled: Slate (whole rock)Previous age of 413 +/-3 (p); 410 +/-3 (p,35%) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Discordant, sigmoidal spectrum; no plateau; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Location: (Maffra 602398; 146.5408E, 37.5618S).Plateau age.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":22481,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22481","STRAT_UNIT_NAME":"Murderers Hill Siltstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Murderers Hill Siltstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-58","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652015","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.586347568,"LONG_GDA94":146.5504846756,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9469","geometry":{"type":"Point","coordinates":[146.55048468,-37.58634757]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9469,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370886","IGSN":"10273/AU7370886","SAMPLENO":7370886,"SAMPLE_ID":"DG86-58","AGE_MA":410,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite; White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: VG3600","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"maximum estimate of the time of cleavage formation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":22481,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22481","STRAT_UNIT_NAME":"Murderers Hill Siltstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Wellington Fault zone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-58","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652015","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.586347568,"LONG_GDA94":146.5504846756,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-04-27","AGE_LAST_UPDATED":"2021-10-12"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8838","geometry":{"type":"Point","coordinates":[146.36203113,-37.3700555]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8838,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370858","IGSN":"10273/AU7370858","SAMPLENO":7370858,"SAMPLE_ID":"CS0048","AGE_MA":419.1,"AGE_MA_UNCERTAINTY":1,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Nevada, Reno, USA","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The white mica from this black slate, from the hangingwall of the faulted western margin of the Jamieson segment, Mt Wellington Fault Zone. Maxiumum age of cleavage development during thrusting of Melbourne Zone.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":12668,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU12668","STRAT_UNIT_NAME":"Mount Easton Shale","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Easton Shale","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS0048","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651997","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3700554965,"LONG_GDA94":146.3620311264,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24576","AGE_REF":"Spaggiari, C.V., Gray, D.R., Foster, D.A., McKnight, S., 2003. Evolution of the boundary between the western and central Lachlan Orogen: implications for Tasmanide tectonics. Australian Journal of Earth Sciences, 50(5), 725-749.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1111/j.1440-0952.2003.01022.x","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8934","geometry":{"type":"Point","coordinates":[144.70352008,-36.93608637]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8934,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370880","IGSN":"10273/AU7370880","SAMPLENO":7370880,"SAMPLE_ID":"DF95-50b","AGE_MA":434,"AGE_MA_UNCERTAINTY":6.7,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Mean metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age dates crenulation cleavage developed during thrusting. Original sample notes material sampled phyllite in text however slate in table (whole rock). Average (intermediate steps) age of 430+/-7 Ma (2s; MSWD=2.9).. Previous age of 426 +/-4 Ma (p, 60%) by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: No plateau; mean age (MSWD=2.9). We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DF95-50","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652011","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9360863707,"LONG_GDA94":144.7035200807,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8335","geometry":{"type":"Point","coordinates":[144.22296333,-37.08595048]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8335,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370881","IGSN":"10273/AU7370881","SAMPLENO":7370881,"SAMPLE_ID":"DG84-17Ba","AGE_MA":447.4,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Single grain fusion analysis: isochron date gives time of faulting; isochron age 100%;  . Previous age of 443 +/-2 Ma by (REF_ID: 29636) FOSTER D. A., GRAY D. R. and BUCHER M. 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: implications for the tectonic evolution of eastern Australia and Gondwana. Tectonics 18, 452-485; Recalcluated age 100% of 39Ar; MSWD=1.4; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977).","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_DG84-17B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652012","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0859504767,"LONG_GDA94":144.2229633297,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8873","geometry":{"type":"Point","coordinates":[143.72476794,-37.07009191]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8873,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371078","IGSN":"10273/AU7371078","SAMPLENO":7371078,"SAMPLE_ID":"MATH-02d","AGE_MA":382.7,"AGE_MA_UNCERTAINTY":4.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Dalhousie University, Canada","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Location in original ref: 2 km south of Maryborough; Biotite separates from two hydrothermally altered dioritic dyke that host gold mineralisation;. Previous age of 374 +/-2 Ma (p, 96%) by (REF_ID: 29527) BIERLEIN F. P., HUGHES M., DUNPHY J., MCKNIGHT S., REYNOLDS P. and WALDRON H. 2001d. Tectonic and economic implications of trace element, 40Ar/39 Ar and Sm-Nd data from mafic dykes associated with orogenic gold mineralisation in central Victoria, Australia. Lithos 58, 1-31. Recalculated age: 57% of 39Ar; MSWD=0.9; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). The relationship between these dykes and other quartz vein associated gold mineralisation in the area is unknown.\"","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MATH-02","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652120","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0700919143,"LONG_GDA94":143.7247679358,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8849","geometry":{"type":"Point","coordinates":[147.10617331,-36.71521269]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8849,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371081","IGSN":"10273/AU7371081","SAMPLENO":7371081,"SAMPLE_ID":"MB45","AGE_MA":395,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Records early Devonian phase of ductile shearing.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":23907,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23907","STRAT_UNIT_NAME":"Pinnak Sandstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Pinnak Sandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"OMEO_MB45","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652123","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Central NSW - Omeo Province","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Omeo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.7152126948,"LONG_GDA94":147.10617331,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. 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Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8339","geometry":{"type":"Point","coordinates":[144.24730003,-37.06150249]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8339,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370883","IGSN":"10273/AU7370883","SAMPLENO":7370883,"SAMPLE_ID":"DG84-18a","AGE_MA":421.3,"AGE_MA_UNCERTAINTY":6.6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age, 60%; Well-defined plateau age gives time of crenulation and reactivation in hanging wall of Whitelaw Fault. Incorrectly labelled DG92-18 in Fig. A1 of Foster et al. 1999. Previous age 417 +/-2 Ma by (REF_ID: 29636) FOSTER, D.A., GRAY, D.R. and BUCHER, M., 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: Implications for the tectonic evolution of eastern Australia. Tectonics 18, pp. 452-485; Recalucated age Sigmoidal spectrum (65% of 39Ar; MSWD=0.8); This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group / Whitelaw Fault thrust sheet","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_DG84-18","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652013","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0615024878,"LONG_GDA94":144.2473000281,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8819","geometry":{"type":"Point","coordinates":[145.88001654,-36.93366985]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8819,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371007","IGSN":"10273/AU7371007","SAMPLENO":7371007,"SAMPLE_ID":"GMD-1a","AGE_MA":372.8,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau over 80% of gas, giving age of contact metamorphism. Tallangallook, drill core (presumably Golden Mountain deposit) GMD12.. Previous age of 369 +/-2 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age: 83% 39 Ar; MSWD=0.9. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":16928,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16928","STRAT_UNIT_NAME":"Sinclair Valley Sandstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Sinclair Valley Sandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"hornfels","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_GMD-1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652079","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.933669848,"LONG_GDA94":145.8800165407,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8820","geometry":{"type":"Point","coordinates":[145.88001654,-36.93366985]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8820,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371008","IGSN":"10273/AU7371008","SAMPLENO":7371008,"SAMPLE_ID":"GMD-1b","AGE_MA":376.2,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau over 80% of gas, giving age of contact metamorphism. Tallangallook, drill core (presumably Golden Mountain deposit) GMD12.. Previous age of 369 +/-2 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age: 83% 39 Ar; MSWD=0.9. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":16928,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU16928","STRAT_UNIT_NAME":"Sinclair Valley Sandstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Sinclair Valley Sandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"hornfels","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_GMD-1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652079","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.933669848,"LONG_GDA94":145.8800165407,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8491","geometry":{"type":"Point","coordinates":[146.44924923,-37.94914864]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8491,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370892","IGSN":"10273/AU7370892","SAMPLENO":7370892,"SAMPLE_ID":"DG86-90c","AGE_MA":440,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent metamorphic maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Averaged age over 3 discordant steps of c.60% of gas release in middle of strongly discordant stair step spectrum with clear detrital component and possible recoil. 3 steps in the center of the spectrum probably record metamorphic mica age and give a mean of 396+/-4 Ma. Alternatively, younger and older aged step could be due to some 39Ar recoil, if recoil is the cause of the discordance then best age estimate for metamorphic mica is the total fusion age of 388+/-4 Ma.  Location: near Walhalla. Material sampled: Slate (whole rock). . Previous age of 396 +/-4 (m, 50%); 388 +/-4 (p) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Staircase spectrum-mixed ages; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010) . Location: (Maffra 602398; 146.5408E, 37.5618S).  Location: map sheet and AGM (Matlock 51599; 146.4388E, 37.9538S)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Montys Hut Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-90","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652016","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9491486397,"LONG_GDA94":146.4492492311,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8667","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8667,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370809","IGSN":"10273/AU7370809","SAMPLENO":7370809,"SAMPLE_ID":"BE-8A_WR MUSb","AGE_MA":400,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This is the age of main plateau, interpreted as intial growth of mica. A subsidiary plateau at 400 +/- 3 Ma is interpreted as later resetting of the system.. Previous age of 449 +/-5  Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309;  Recalculated age No plateau; Staircase spectrum;  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8669","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8669,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370811","IGSN":"10273/AU7370811","SAMPLENO":7370811,"SAMPLE_ID":"BE-8A_WR MUSd","AGE_MA":405,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This is the age of main plateau, interpreted as intial growth of mica. A subsidiary plateau at 400 +/- 3 Ma is interpreted as later resetting of the system.. Previous age of 449 +/-5  Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309;  Recalculated age No plateau; Staircase spectrum;   We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8801","geometry":{"type":"Point","coordinates":[144.46393703,-37.52736925]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8801,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370823","IGSN":"10273/AU7370823","SAMPLENO":7370823,"SAMPLE_ID":"BQ-5","AGE_MA":500,"AGE_MA_UNCERTAINTY":6.4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Plateau unknown not captured","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Detrital mica age. Sample location: 12 km N of Coimadai at an adit near the Bullengarook quarry. Possibly the Golden Top Mine.Previous age of 493 +/-4Ma/475+/-5 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age:71% of 39Ar; MSWD=1.6. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). No discussion of sample in text. . Inherited zircons only.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BQ.5-6","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651991","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5273692533,"LONG_GDA94":144.4639370326,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8802","geometry":{"type":"Point","coordinates":[144.46393703,-37.52736925]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8802,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370824","IGSN":"10273/AU7370824","SAMPLENO":7370824,"SAMPLE_ID":"BQ-5","AGE_MA":504.4,"AGE_MA_UNCERTAINTY":6.4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"Plateau unknown not captured","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Detrital mica age. Sample location: 12 km N of Coimadai at an adit near the Bullengarook quarry. Possibly the Golden Top Mine.Previous age of 493 +/-4Ma/475+/-5 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age:71% of 39Ar; MSWD=1.6. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). No discussion of sample in text. . Inherited zircons only.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BQ.5-6","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651991","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5273692533,"LONG_GDA94":144.4639370326,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8283","geometry":{"type":"Point","coordinates":[144.06671711,-36.97769304]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8283,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371085","IGSN":"10273/AU7371085","SAMPLENO":7371085,"SAMPLE_ID":"MDN-01a","AGE_MA":370,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Apparent maximum age for dyke.. Previous age of 375 +/-4 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age: Increasing age spectrum; total-gas age=351+5 Ma; discordant age spectra, possibly owing to chlorite alteration, and do not provide additional age constraints. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977) ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous rock","LITHOLOGY":"igneous rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MDDN","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652125","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9776930409,"LONG_GDA94":144.066717108,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8284","geometry":{"type":"Point","coordinates":[144.06671711,-36.97769304]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8284,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371086","IGSN":"10273/AU7371086","SAMPLENO":7371086,"SAMPLE_ID":"MDN-01b","AGE_MA":250,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Apparent maximum age for dyke.. Previous age of 375 +/-4 Ma by (REF_ID: 34454) BIERLEIN, F.P., ARNE, D.C., REYNOLDS, P. and MCNAUGHTON, N.J., 1999. AMIRA P478: Victorian Gold - Timing Relationships and Emplacement, Final report on Geochronology; Recalculated age: Increasing age spectrum; total-gas age=351+5 Ma; discordant age spectra, possibly owing to chlorite alteration, and do not provide additional age constraints. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977) ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous rock","LITHOLOGY":"igneous rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_MDDN","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652125","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9776930409,"LONG_GDA94":144.066717108,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8492","geometry":{"type":"Point","coordinates":[146.44924923,-37.94914864]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8492,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370893","IGSN":"10273/AU7370893","SAMPLENO":7370893,"SAMPLE_ID":"DG86-90d","AGE_MA":365,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent metamorphic minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Averaged age over 3 discordant steps of c.60% of gas release in middle of strongly discordant stair step spectrum with clear detrital component and possible recoil. 3 steps in the center of the spectrum probably record metamorphic mica age and give a mean of 396+/-4 Ma. Alternatively, younger and older aged step could be due to some 39Ar recoil, if recoil is the cause of the discordance then best age estimate for metamorphic mica is the total fusion age of 388+/-4 Ma.  Location: near Walhalla. Material sampled: Slate (whole rock). Previous age of 396 +/-4 (m, 50%); 388 +/-4 (p) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Staircase spectrum-mixed ages; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010).  Location: (Maffra 602398; 146.5408E, 37.5618S). Location: map sheet and AGM (Matlock 51599; 146.4388E, 37.9538S). Locality given by Foster et al. (1999) does not plot near any outcrops. Presumably the rock comes from a large cutting on the Alpine Road about 1 km away from the location given in the source. Age is a plateau age.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Montys Hut Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-90","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652016","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9491486397,"LONG_GDA94":146.4492492311,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8933","geometry":{"type":"Point","coordinates":[144.70352008,-36.93608637]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8933,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370879","IGSN":"10273/AU7370879","SAMPLENO":7370879,"SAMPLE_ID":"DF95-50","AGE_MA":430.1,"AGE_MA_UNCERTAINTY":6.7,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Mean metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age dates crenulation cleavage developed during thrusting. Original sample notes material sampled phyllite in text however slate in table (whole rock). Average (intermediate steps) age of 430+/-7 Ma (2s; MSWD=2.9).. Previous age of 426 +/-4 Ma (p, 60%) by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: No plateau; mean age (MSWD=2.9). This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DF95-50","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652011","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9360863707,"LONG_GDA94":144.7035200807,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9468","geometry":{"type":"Point","coordinates":[144.70352008,-36.93608637]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9468,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370879","IGSN":"10273/AU7370879","SAMPLENO":7370879,"SAMPLE_ID":"DF95-50","AGE_MA":426,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: VG3600","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"growth of most of the metamorphic mica","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Heathcote Fault zone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DF95-50","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652011","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9360863707,"LONG_GDA94":144.7035200807,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. 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A plateau, representing nearly 80% of the argon released, indicates ages in the range of 460 to 450 Ma. Samples analysed at either Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of c.440 by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age Staircase spectrum; high T age plateau; 59% of 39Ar; MSWD=0.8; Plateau age=459.2+/-6.8Ma(2S). Same age of 459.2 +/- 6.8 using both the standard ages reported by Renne et al. 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Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_E","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651987","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5510590129,"LONG_GDA94":143.8953217657,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. 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Younger gradient of 439 to 380 Ma may be due to dyke intrusion about 370 Ma. Mean weighted age from spectra of two separates.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BH-BE","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651990","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6182828281,"LONG_GDA94":143.8552119337,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. 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Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8315","geometry":{"type":"Point","coordinates":[144.12971702,-37.33502873]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8315,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371181","IGSN":"10273/AU7371181","SAMPLENO":7371181,"SAMPLE_ID":"RHD19 _FV11a","AGE_MA":375.18,"AGE_MA_UNCERTAINTY":0.64,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"sericite-altered whole rock chip; furnace; plateau age weighted mean age for 55% of gas released; pyrite formed earlier and incorporated older metamorphic mica or primary dyke minerals which have then been partially overprinted by hydrothermal alteration associated with gold","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_RHD19 _FV9-11","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652194","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3350287341,"LONG_GDA94":144.1297170237,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73076","AGE_REF":"MacCulloch, J., 2005, 40Ar/39Ar constraints on the timing of gold mineralisation in the Fosterville, Nagambie and Walhalla deposits. 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Alternatively, younger and older aged step could be due to some 39Ar recoil, if recoil is the cause of the discordance then best age estimate for metamorphic mica is the total fusion age of 388+/-4 Ma.  Location: near Walhalla. Material sampled: Slate (whole rock). . Previous age of 396 +/-4 (m, 50%); 388 +/-4 (p) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Staircase spectrum-mixed ages;  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977).  Location: map sheet and AGM (Matlock 51599; 146.4388E, 37.9538S)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Montys Hut Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-90","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652016","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9491486397,"LONG_GDA94":146.4492492311,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. 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If so, total fusion age 388+/- may be better estimate","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Wellington Fault zone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-90","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652016","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9491486397,"LONG_GDA94":146.4492492311,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. 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Alternatively, younger and older aged step could be due to some 39Ar recoil, if recoil is the cause of the discordance then best age estimate for metamorphic mica is the total fusion age of 388+/-4 Ma.  Location: near Walhalla. Material sampled: Slate (whole rock). . Previous age of 396 +/-4 (m, 50%); 388 +/-4 (p) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Staircase spectrum-mixed ages;  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Location: map sheet and AGM (Matlock 51599; 146.4388E, 37.9538S)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Montys Hut Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-90","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652016","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9491486397,"LONG_GDA94":146.4492492311,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8655","geometry":{"type":"Point","coordinates":[143.836376,-37.57839668]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8655,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370829","IGSN":"10273/AU7370829","SAMPLENO":7370829,"SAMPLE_ID":"BW-6_541.1Md","AGE_MA":395,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Thought to be a partial resetting of micas that grew intially at about 450 Ma. Previous age of 435+/-7  Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309;  Recalculated age Staircase spectrum;  We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_W","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651983","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5783966779,"LONG_GDA94":143.8363759979,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8807","geometry":{"type":"Point","coordinates":[144.51123167,-36.68608472]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8807,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370907","IGSN":"10273/AU7370907","SAMPLENO":7370907,"SAMPLE_ID":"FOD-1a","AGE_MA":383.6,"AGE_MA_UNCERTAINTY":4.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau giving age of alteration.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 381 +/- 2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767;  Recalculated age: 85% of 39Ar; MSWD=0.4; decreasing ages (recoil affected?); discordant age spectra with apparent ages generally decreasing with increasing temperature suggesting data have been affected by recoil loss/redistribution of 39Ar however a statistical plateau age of 384 +/-6 Ma (2s; 85% of 39Ar; MSWD=0.4), suggest hydrothermal alteration possibly occured soon after dyke intrusion. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"dyke, felsic","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"FOSTERVILLE_FO","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652023","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.6860847244,"LONG_GDA94":144.5112316722,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8659","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8659,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370801","IGSN":"10273/AU7370801","SAMPLENO":7370801,"SAMPLE_ID":"BE-8A_658.6Mb","AGE_MA":390,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Stair-step spectrum from 450 to 400 Ma. Interpreted as mixture of 450 Ma initial mica growth and 400 Ma resetting of system.. Previous age of 0 Ma by (REF_ID: 28597) BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age Staircase spectrum; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8309","geometry":{"type":"Point","coordinates":[144.07504087,-36.97121227]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8309,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371068","IGSN":"10273/AU7371068","SAMPLENO":7371068,"SAMPLE_ID":"M02-HGNR","AGE_MA":372,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Mean metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Note: mean (13 out of 15 steps). Furnace step-heating. Serial number 15 in table 1. Either recrystallisation of biotite during Harcourt Granite emplacement or growth during contact metamorphism. Gold mineralisation redistributed during emplacement fo Harcourt Granite.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":8069,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8069","STRAT_UNIT_NAME":"Harcourt Granodiorite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Harcourt Granodiorite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_M02-HGNR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652115","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9712122738,"LONG_GDA94":144.0750408713,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73054","AGE_REF":"Fu, B., Fairmaid, A.M., Phillips, D., 2009. New 40Ar/39Ar geochronology of gold deposits in central Victoria: final report. GeoScience Victoria Gold Undercover Report, 19, 31pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:36638","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8307","geometry":{"type":"Point","coordinates":[144.07482045,-36.97139607]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8307,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371069","IGSN":"10273/AU7371069","SAMPLENO":7371069,"SAMPLE_ID":"M06-NR","AGE_MA":370,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Note: all 23 steps. Laser probe, 2-3 steps. serial number 16 in table 1. Gold mineralisation redistributed during emplacement fo Harcourt Granite.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"vein, quartz","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_M06-NR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652116","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9713960739,"LONG_GDA94":144.074820449,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73054","AGE_REF":"Fu, B., Fairmaid, A.M., Phillips, D., 2009. New 40Ar/39Ar geochronology of gold deposits in central Victoria: final report. GeoScience Victoria Gold Undercover Report, 19, 31pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:36638","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8808","geometry":{"type":"Point","coordinates":[144.51123167,-36.68608472]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8808,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370908","IGSN":"10273/AU7370908","SAMPLENO":7370908,"SAMPLE_ID":"FOD-1b","AGE_MA":387.1,"AGE_MA_UNCERTAINTY":4.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau giving age of alteration.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 381 +/- 2  Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: 85% of 39Ar; MSWD=0.4; decreasing ages (recoil affected?);  discordant age spectra with apparent ages generally decreasing with increasing temperature suggesting data have been affected by recoil loss/redistribution of 39Ar however a statistical plateau age of 384 +/-6 Ma (2s; 85% of 39Ar; MSWD=0.4), suggest hydrothermal alteration possibly occured soon after dyke intrusion. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010); ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"dyke, felsic","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"acid intrusive rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"FOSTERVILLE_FO","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652023","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.6860847244,"LONG_GDA94":144.5112316722,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8661","geometry":{"type":"Point","coordinates":[143.8540802,-37.61831023]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8661,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370803","IGSN":"10273/AU7370803","SAMPLENO":7370803,"SAMPLE_ID":"BE-8A_658.6Md","AGE_MA":395,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Stair-step spectrum from 450 to 400 Ma. Interpreted as mixture of 450 Ma initial mica growth and 400 Ma resetting of system.. Previous age of 0 Ma by (REF_ID: 28597) BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age Staircase spectrum; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010); Older ages may reflect the inclusion of older metamorphic or detrital micas whilst younger ages may be due to partial resetting or new mica growth.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"medium-coarse grained siliciclastic rock","LITHOLOGY":"arenite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BE-8A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651988","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.6183102284,"LONG_GDA94":143.8540802047,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8496","geometry":{"type":"Point","coordinates":[146.55048468,-37.58634757]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8496,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370887","IGSN":"10273/AU7370887","SAMPLENO":7370887,"SAMPLE_ID":"DG86-58b","AGE_MA":400,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent deformation minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Small fraction c.1-4%. of larger white mica grains within the cleavage that may be residual detrital grains. Plateau age. 410 +/-3 Ma c.40% of gas released records max time of cleavage formation. Total fusion age is 413 +/- 3 Ma. Records early cleavage formation. Saddle-shaped spectrum suggests the error should be much greater, because of recoil. Comment from GEOVIC: the location given in Foster et al 1999 (Tectonics) in latitude and longitude puts this site too far north. Material sampled: Slate (whole rock). Previous age of 413 +/-3 (p); 410 +/-3 (p,35%) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Discordant, sigmoidal spectrum; no plateau; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Location: (Maffra 602398; 146.5408E, 37.5618S).","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":22481,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22481","STRAT_UNIT_NAME":"Murderers Hill Siltstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Murderers Hill Siltstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-58","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652015","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.586347568,"LONG_GDA94":146.5504846756,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8290","geometry":{"type":"Point","coordinates":[144.07095874,-36.99916334]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8290,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371070","IGSN":"10273/AU7371070","SAMPLENO":7371070,"SAMPLE_ID":"M16-DR","AGE_MA":372,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Note: all 17 steps. Laster probe, 2-3 steps. serial number 17 in table 1. Gold mineralisation redistributed during emplacement fo Harcourt Granite.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"vein, quartz","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_M16-DR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652117","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9991633372,"LONG_GDA94":144.0709587448,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73054","AGE_REF":"Fu, B., Fairmaid, A.M., Phillips, D., 2009. New 40Ar/39Ar geochronology of gold deposits in central Victoria: final report. GeoScience Victoria Gold Undercover Report, 19, 31pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:36638","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8834","geometry":{"type":"Point","coordinates":[146.3251605,-37.20039092]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8834,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370868","IGSN":"10273/AU7370868","SAMPLENO":7370868,"SAMPLE_ID":"CS9826b","AGE_MA":451.2,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau age from slate within melange zone. Dates the dominant S2 fabric. locality; Map sheet Buller south 8123-1-S: DU400825. Location in original ref: Howqua River near Maxwells HutsPrevious age of 446 +/-2 Ma (p, 100%) by (REF_ID: 33324) by Spaggiari, C.V., Gray, D.R., Foster, D.A. and Fanning, C.M., 2002. Occurrence and significance of blueschist in the southern Lachlan Orogen. Australian Journal of Earth Sciences, 49(2), pp.255-269. Recalculated age: High temp plateau age (MSWD=1.2; 74% of 39Ar). We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Sample collected by Vincent Morand, on Smart Creek - Tawonga Gap Track. Age is a plateau age.\"","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Undifferentiated Ordovician/Silurian sedimentary rocks","UNIT_NAME_SOURCE":"Undifferentiated Ordovician/Silurian sedimentary rocks","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS9826","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652005","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2003909157,"LONG_GDA94":146.3251605008,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8835","geometry":{"type":"Point","coordinates":[146.3251605,-37.20039092]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8835,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370869","IGSN":"10273/AU7370869","SAMPLENO":7370869,"SAMPLE_ID":"CS9826c","AGE_MA":447.2,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"85% of the gas released; formation of dominant fabric; Map sheet Buller south 8123-1-S: DU400825).From Phillips, 2012: Analysis of whole rock slate chips (CS9826) from the Governor Fault Zone produced a `staircase¿ age spectrum, with a high-temperature plateau age of 447+-7 Ma (2s; MSWD¼1.2; 74% of 39Ar); previous reported age 446+-2. Detrital suite: peaks at 500-600 Ma, 1000-1200 Ma, 1600-1800 Ma.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS9826","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652005","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2003909157,"LONG_GDA94":146.3251605008,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24003","AGE_REF":"Spaggiari, C.V., Gray, D.R., Foster, D.A., Fanning, C.M., 2002. Occurrence and significance of blueschist in the southern Lachlan Orogen. Australian Journal of Earth Sciences, 49(2), 255-269.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2002.00915.x","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8497","geometry":{"type":"Point","coordinates":[146.55048468,-37.58634757]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8497,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370888","IGSN":"10273/AU7370888","SAMPLENO":7370888,"SAMPLE_ID":"DG86-58c","AGE_MA":445,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent deformation maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Small fraction c.1-4%. of larger white mica grains within the cleavage that may be residual detrital grains. Plateau age. 410 +/-3 Ma c.40% of gas released records max time of cleavage formation. Total fusion age is 413 +/- 3 Ma. Records early cleavage formation. Saddle-shaped spectrum suggests the error should be much greater, because of recoil. Comment from GEOVIC: the location given in Foster et al 1999 (Tectonics) in latitude and longitude puts this site too far north. Material sampled: Slate (whole rock). Previous age of 413 +/-3 (p); 410 +/-3 (p,35%) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Discordant, sigmoidal spectrum; no plateau; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Location: (Maffra 602398; 146.5408E, 37.5618S).","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":22481,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22481","STRAT_UNIT_NAME":"Murderers Hill Siltstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Murderers Hill Siltstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-58","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652015","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.586347568,"LONG_GDA94":146.5504846756,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8498","geometry":{"type":"Point","coordinates":[146.55048468,-37.58634757]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8498,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370889","IGSN":"10273/AU7370889","SAMPLENO":7370889,"SAMPLE_ID":"DG86-58d","AGE_MA":405,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent deformation minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Small fraction c.1-4%. of larger white mica grains within the cleavage that may be residual detrital grains. Plateau age. 410 +/-3 Ma c.40% of gas released records max time of cleavage formation. Total fusion age is 413 +/- 3 Ma. Records early cleavage formation. Saddle-shaped spectrum suggests the error should be much greater, because of recoil. Comment from GEOVIC: the location given in Foster et al 1999 (Tectonics) in latitude and longitude puts this site too far north. Material sampled: Slate (whole rock). Previous age of 413 +/-3 (p); 410 +/-3 (p,35%) Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Discordant, sigmoidal spectrum; no plateau; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Location: map sheet and AGM (Maffra 602398; 146.5408E, 37.5618S).","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":22481,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU22481","STRAT_UNIT_NAME":"Murderers Hill Siltstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Murderers Hill Siltstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_DG86-58","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652015","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.586347568,"LONG_GDA94":146.5504846756,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8833","geometry":{"type":"Point","coordinates":[146.3251605,-37.20039092]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8833,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370867","IGSN":"10273/AU7370867","SAMPLENO":7370867,"SAMPLE_ID":"CS9826a","AGE_MA":447.2,"AGE_MA_UNCERTAINTY":6.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Good plateau age from slate within melange zone. Dates the dominant S2 fabric. locality; Map sheet Buller south 8123-1-S: DU400825. Location in original ref: Howqua River near Maxwells HutsPrevious age of 446 +/-2 Ma (p, 100%) by (REF_ID: 33324) by Spaggiari, C.V., Gray, D.R., Foster, D.A. and Fanning, C.M., 2002. Occurrence and significance of blueschist in the southern Lachlan Orogen. Australian Journal of Earth Sciences, 49(2), pp.255-269. Recalculated age: High temp plateau age (MSWD=1.2; 74% of 39Ar). This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). . Sample collected by Vincent Morand. Foster et al. (1999) have an inaccurate location about 3 km away.Age is the total fusion age. The maximum age on gradient is 418 Ma (interpreted by Foster et al. (1999) as cooling related to first movements on nearby Kancoona Fault). The minimum age on gradient is 363 Ma.\"","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"Undifferentiated Ordovician/Silurian sedimentary rocks","UNIT_NAME_SOURCE":"Undifferentiated Ordovician/Silurian sedimentary rocks","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_CS9826","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652005","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2003909157,"LONG_GDA94":146.3251605008,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13381","geometry":{"type":"Point","coordinates":[146.32685221,-32.11019874]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13381,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2771374","IGSN":"10273/AU2771374","SAMPLENO":2771374,"SAMPLE_ID":"NSWSJAF0165.03T","AGE_MA":387.2,"AGE_MA_UNCERTAINTY":6.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.5,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6395","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Hydrothermal activity","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"skarn","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"This sample was taken from 241.0-241.12 m depth in diamond drillhole HRUD600 at Kershaws prospect, less than 1 km E of the Hera orebody, which is the target of a polymetallic (gold-lead-zinc-silver) underground mine about 100 km SE of Cobar. The sample is a weakly mineralised garnet-epidote-anorthite rich skarn vein, which also hosts fibrous amphibole, and relatively coarse-grained (up to 1 mm) titanite intimately intergrown with skarn epidote. Skarn veins at Kershaws prospect predate the main phase of mineralisation, and are deformed within a biotite-rich foliation. At Hera, Fitzherbert et al. (2021) dated a similar foliation (interpreted to have formed the same event) at 390.03 +/- 0.23 Ma and 389.60 +/- 0.23 Ma via biotite 40Ar/39Ar analysis. At the nearby Hera orebody, titanite intimately intergrown with the mineralising Au-skarn yielded U-Pb dates of 403.4 +/- 1.1 Ma (via ID-TIMS; Fitzherbert et al., 2021) and 404.2 +/- 5.1 Ma (via SHRIMP; Waltenberg et al., 2019), and titanite cross-cutting the mineralising skarn yielded an indistinguishable U–Pb date of 402.3 +/- 3.6 Ma (via LA-ICPMS, Fitzherbert et al., 2021). However, titanite from late-stage veins at Hera yielded U–Pb dates of 384.8 +/- 1.1 Ma (via ID-TIMS; Fitzherbert et al., 2021) and 382.5 +/- 3.1 Ma (via SHRIMP; Waltenberg et al., 2019). Dating titanite in this garnet-bearing skarn vein will constrain the age of skarn formation and impose a maximum age on mineralisation at Kershaws prospect, thereby providing insights into its relationship with the main Hera orebody. In thin section, this skarn vein is dominated by intergrown garnet, epidote and anorthite, and is weakly mineralised. Minor vein-hosted phases include fibrous amphibole and relatively coarse-grained (up to 1 mm) titanite, which is intimately intergrown with skarn epidote. Skarn veins at Kershaws prospect predate the main phase of mineralisation, and are deformed within a biotite-rich foliation.","SAMPLING_FEATURE_NAME":"HRUD600","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH628646","BOREHOLE_TOP_DEPTH_M":241,"BOREHOLE_BASE_DEPTH_M":241.12,"GEOLOGICAL_PROVINCE":"Cobar Basin","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.11019874,"LONG_GDA94":146.3268522106,"ELEV_M_AHD":311,"ACCURACY_M":1,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Geological Survey of New South Wales (GSNSW)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73578","AGE_REF":"Waltenberg, K., Bodorkos, S., Fitzherbert, J.A., Blevin, P.L., 2022. New SHRIMP U-Pb zircon and titanite ages from the Cobar Basin and Lachlan Orogen, New South Wales: Mineral Systems Projects, July 2017-June 2019. Geoscience Australia. Record, 2022/34, 72p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2022.034","AGE_ENTRY_DATE":"2022-09-02","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8880","geometry":{"type":"Point","coordinates":[143.836376,-37.57839668]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8880,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370834","IGSN":"10273/AU7370834","SAMPLENO":7370834,"SAMPLE_ID":"BW-6B_607Ma","AGE_MA":442,"AGE_MA_UNCERTAINTY":5.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Possible metamorphic age. Another smaller plateau at 463 +/- 4 Ma of unknown significance. Previous age of 437 +/-6 Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age Staircase spectrum; 61% of 39Ar; MSWD=0.7; low temperature plateau age of 442+/-7 Ma (2s; 61% of 39Ar; MSWD=0.7); This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Mix of ca 445 Ma hydrothermal and c.460 Ma metamorphic/detrital micas.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_W","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651983","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5783966779,"LONG_GDA94":143.8363759979,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8881","geometry":{"type":"Point","coordinates":[143.836376,-37.57839668]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8881,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370835","IGSN":"10273/AU7370835","SAMPLENO":7370835,"SAMPLE_ID":"BW-6B_607Mb","AGE_MA":446,"AGE_MA_UNCERTAINTY":5.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Possible metamorphic age. Another smaller plateau at 463 +/- 4 Ma of unknown significance. Previous age of 437 +/-6 Ma by (REF_ID: 28597)  BIERLEIN, F.P., FOSTER, D.A., MCKNIGHT, S.W. and ARNE, D.C., 1999. Timing of gold mineralisation in the Ballarat goldfields, central Victoria: constraints from 40Ar/39Ar results. Australian Journal of Earth Sciences 46, pp. 301-309; Recalculated age Staircase spectrum; 61% of 39Ar; MSWD=0.7; low temperature plateau age of 442+/-7 Ma (2s; 61% of 39Ar; MSWD=0.7); We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Mix of ca 445 Ma hydrothermal and c.460 Ma metamorphic/detrital micas.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_W","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651983","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5783966779,"LONG_GDA94":143.8363759979,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7963","geometry":{"type":"Point","coordinates":[140.7052056,-20.44308611]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7963,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6661373","IGSN":"10273/AU6661373","SAMPLENO":6661373,"SAMPLE_ID":"ERNEST HENRY","AGE_MA":1529.4,"AGE_MA_UNCERTAINTY":9.7,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: unknown model","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"early Na–Ca alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Age uncertainty is asymmetrical (+11/-8.4 Ma). The mean of these two uncertainties has been reported in this compilation. ","AGE_SOURCE":"GSQ compilation, 2016","PROJECT":null,"STRATNO":31420,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU31420","STRAT_UNIT_NAME":"Mount Fort Constantine Volcanics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Fort Constantine Volcanics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous rock","LITHOLOGY":"metamorphosed igneous rock","MODE_OF_OCCURRENCE":"hydrothermal alteration","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Mark et al 2006: \"The Ernest Henry hydrothermal system was formed by two cycles of sodic and potassic alteration where biotite–magnetite alteration produced in the first cycle formed ca 1514+/-24 Ma, whereas paragenetically later Na–Ca veining formed ca 1529 +11/-8 Ma. These new U-Pb titanate age dates support textural evidence for incursion of hydrothermal fluids after the metamorphic peak, and overlap with earlier estimates for the timing of Cu-Au mineralization (ca 1540–1500 Ma).\"","SAMPLING_FEATURE_NAME":"CLONCURRY_ERNEST HENRY","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS649134","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Carpentaria Lowlands Region","GEOLOGICAL_REGION_NAME":"Carpentaria Lowlands Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.44308611,"LONG_GDA94":140.7052056,"ELEV_M_AHD":null,"ACCURACY_M":500,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"61963","AGE_REF":"Mark, G., Oliver, N.H.S., Williams, P.J., 2006. Mineralogical and chemical evolution of the Ernest Henry Fe oxide-Cu-Au ore system, Cloncurry district, northwest Queensland, Australia. Mineralium Deposita, 40(8), 769-801.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1007/s00126-005-0009-7","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7967","geometry":{"type":"Point","coordinates":[140.7052056,-20.44308611]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7967,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6661373","IGSN":"10273/AU6661373","SAMPLENO":6661373,"SAMPLE_ID":"ERNEST HENRY","AGE_MA":1514,"AGE_MA_UNCERTAINTY":24,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: unknown model","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"pre-ore biotite–magnetite alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSQ compilation, 2016","PROJECT":null,"STRATNO":31420,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU31420","STRAT_UNIT_NAME":"Mount Fort Constantine Volcanics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Fort Constantine Volcanics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"igneous rock","LITHOLOGY":"metamorphosed igneous rock","MODE_OF_OCCURRENCE":"hydrothermal alteration","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Mark et al 2006: \"The Ernest Henry hydrothermal system was formed by two cycles of sodic and potassic alteration where biotite–magnetite alteration produced in the first cycle formed ca 1514+/-24 Ma, whereas paragenetically later Na–Ca veining formed ca 1529 +11/-8 Ma. These new U-Pb titanate age dates support textural evidence for incursion of hydrothermal fluids after the metamorphic peak, and overlap with earlier estimates for the timing of Cu-Au mineralization (ca 1540–1500 Ma).\"","SAMPLING_FEATURE_NAME":"CLONCURRY_ERNEST HENRY","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS649134","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Carpentaria Lowlands Region","GEOLOGICAL_REGION_NAME":"Carpentaria Lowlands Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.44308611,"LONG_GDA94":140.7052056,"ELEV_M_AHD":null,"ACCURACY_M":500,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"61963","AGE_REF":"Mark, G., Oliver, N.H.S., Williams, P.J., 2006. Mineralogical and chemical evolution of the Ernest Henry Fe oxide-Cu-Au ore system, Cloncurry district, northwest Queensland, Australia. Mineralium Deposita, 40(8), 769-801.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1007/s00126-005-0009-7","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8924","geometry":{"type":"Point","coordinates":[146.44999909,-37.94322167]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8924,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370761","IGSN":"10273/AU7370761","SAMPLENO":7370761,"SAMPLE_ID":"88_14 _WH1b","AGE_MA":368.8,"AGE_MA_UNCERTAINTY":2.2,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"total gas","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Total gas metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"sericite-altered whole rock chip; furnace. Pervasively altered and moderately deformed meta-sandstone wallrock","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary siliciclastic rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_88_14 _WH1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651958","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9432216721,"LONG_GDA94":146.4499990911,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73076","AGE_REF":"MacCulloch, J., 2005, 40Ar/39Ar constraints on the timing of gold mineralisation in the Fosterville, Nagambie and Walhalla deposits. B.Sc (Hons) thesis, Monash University, Melbourne (unpubl.), 80pp.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4452","geometry":{"type":"Point","coordinates":[139.91208417,-21.03433645]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4452,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2808846","IGSN":"10273/AU2808846","SAMPLENO":2808846,"SAMPLE_ID":"BB5906","AGE_MA":1515,"AGE_MA_UNCERTAINTY":13,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.31,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6424","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":"GSQ - Mary Kathleen Domain","STRATNO":4727,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4727","STRAT_UNIT_NAME":"Corella Formation","INFORMAL_UNIT_NAME":"Corella Formation/a","UNIT_NAME_SOURCE":"Corella Formation (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid volcanic rock","LITHOLOGY":"rhyolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample is from a subunit of the Corella Formation comprising mainly foliated and recrystallised metarhyolite and metadacite (Bultitude et al., 1982; Blake et al., 1984). It was collected from a small, blocky outcrop on the crest of a broad, low, rounded ridge south of the Overlander–Kalman track. Sample BB5906 consists of pale grey, very fine-grained, slightly porphyritic metarhyolite containing scattered, white to buff, subhedral–anhedral K-feldspar phenocrysts, up to ca. 8 mm long, and generally smaller mafic clots. Fine banding, possibly representing flow banding is commonly displayed on weathered surfaces. The metarhyolite is non-magnetic, with an average (of 11 measurements) magnetic susceptibility of <0.05 x 10-3 SI units.","SAMPLING_FEATURE_NAME":"BB5906","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS637094","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.0343364511,"LONG_GDA94":139.912084168,"ELEV_M_AHD":null,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"rocky ridge south of Overlander-Kalman track","SAMPLE_ACQUISITION_DATE":"2019-02-28","SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72596","AGE_REF":"Kositcin, N., Bultitude, R.J., Purdy, D.J., 2019. Summary of results. Joint GSQ-GA Geochronology Project: Mary Kathleen Domain, Mount Isa Inlier, 2018-2019. Queensland Geological Record, 2019/02, 81p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr117261","AGE_ENTRY_DATE":"2020-04-11","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4444","geometry":{"type":"Point","coordinates":[139.85965595,-21.34239053]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4444,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2808847","IGSN":"10273/AU2808847","SAMPLENO":2808847,"SAMPLE_ID":"BB5933","AGE_MA":1500,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.57,"NUMBER_OF_ANALYSES":22,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"GA6427","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/)","PROJECT":"GSQ - Mary Kathleen Domain","STRATNO":24398,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24398","STRAT_UNIT_NAME":"Mount Erle Igneous Complex","INFORMAL_UNIT_NAME":"Mount Erle Igneous Complex/m","UNIT_NAME_SOURCE":"Mount Erle Igneous Complex (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"intrusion","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The Mount Erle Igneous Complex (ca. 32km2) extends from ca. 2 km north of Duchess to ca. 13 km south of the town site. The complex intrudes the Corella Formation as a lensoidal body up to ca. 4 km wide, with a pronounced northerly elongation, and comprises pink granite (commonly foliated), metadolerite, gabbro, and ‘diorite’ together with minor aplite and quartz–feldspar pegmatite (Blake et al., 1984). Granite and dolerite/gabbro are intimately mixed locally to form net-veined complexes  (Blake et al., 1984). This sample was collected from a bouldery knoll on the eastern side of the access track adjacent to the Townsville–Mount Isa railway line. It comprises pinkish grey to pink, fine- to medium-grained, uneven-grained to moderately porphyritic, amphibole-bearing granite containing numerous coarse pink K-feldspar phenocrysts up to ca. 2 cm long (most <1.5 cm). The granite is cut by several lenses, up to ca. 30 cm thick, of quartz plus pink K-feldspar pegmatite. Thin section examination indicates the granite comprises mainly K-feldspar (ca. 45%), quartz (ca. 30%) and plagioclase (ca. 15%), together with ca. 10% mafic minerals and titanite.","SAMPLING_FEATURE_NAME":"BB5933","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS637095","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Isa Orogen","GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.3423905255,"LONG_GDA94":139.8596559486,"ELEV_M_AHD":null,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"bouldery knoll east of track along railway line","SAMPLE_ACQUISITION_DATE":"2019-02-28","SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72596","AGE_REF":"Kositcin, N., Bultitude, R.J., Purdy, D.J., 2019. Summary of results. Joint GSQ-GA Geochronology Project: Mary Kathleen Domain, Mount Isa Inlier, 2018-2019. Queensland Geological Record, 2019/02, 81p.","AGE_PUBLICATION_LINKS":"https://geoscience.data.qld.gov.au/report/cr117261","AGE_ENTRY_DATE":"2020-04-11","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8349","geometry":{"type":"Point","coordinates":[144.26996418,-36.7649113]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8349,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370838","IGSN":"10273/AU7370838","SAMPLENO":7370838,"SAMPLE_ID":"CD11-21a","AGE_MA":446.3,"AGE_MA_UNCERTAINTY":4.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age giving age of vein formation. Total fusion age of 445 Ma. Samples analysed at either Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age 442 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age Saddle-shaped spectrum; 83% of 39Ar; MSWD=2.1; Plateau age=446.3+/-4.6 Ma (2S). This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977); ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_CD.9-11","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651994","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.7649112966,"LONG_GDA94":144.2699641841,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13083","geometry":{"type":"Point","coordinates":[135.95583,-19.520077]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13083,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2786115","IGSN":"10273/AU2786115","SAMPLENO":2786115,"SAMPLE_ID":"2018339537","AGE_MA":1844,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6414","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"EFTF","STRATNO":81848,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU81848","STRAT_UNIT_NAME":"Alroy Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample ET2786115 was selected to constrain the timing and conditions of tectono-metamorphism in the East Tennant area. It is a cordierite-andalusite gneiss obtained from a downhole depth of 169 m in drill hole DDH005, drilled in 2008 by Jacaranda Minerals (Collins, 2009). It is representative of a ~50 m interval of steeply-dipping pelitic gneiss and schist within the Alroy Formation (Collins, 2009, Clark et al., 2021a). A sample from this interval, immediately adjacent to our U-Pb monazite sample, returned a U-Pb zircon maximum deposition age of ca. 1873 Ma (Cross et al., 2020). Sample ET2786115 contains andalusite, sillimanite, biotite, muscovite, plagioclase, K-feldspar, quartz and minor cordierite. The sample exhibits subtle compositional layering defined by varying proportions of biotite, muscovite and quartz. Biotite and rare muscovite define a strong schistose fabric parallel to the compositional layering. Muscovite more commonly occurs as coarse, tabular grains that crosscut the foliation. Andalusite (up to 5 mm) is poikiloblastic and contains inclusions of foliation-parallel biotite and quartz. Andalusite grains are surrounded by biotite and, locally, sillimanite. The modal abundance of andalusite is estimated to be 1-3%. Sillimanite (fibrolite) locally overgrows but also parallels the main fabric. Sillimanite is heterogeneously distributed, and its overall abundance is estimated to be 5-10%. Rare (<3%) cordierite is aligned with the main fabric and is mostly altered to sericite. Quartz commonly exhibits amoeboid grain boundaries. Subtle chessboard extinction textures are discernible locally. Apatite and tourmaline are minor, matrix accessory phases. Monazite forms subhedral grains up to 50 um long, sub-parallel to the main fabric, and mostly associated with biotite-sillimanite domains that show little evidence of retrograde alteration. No monazite was observed as inclusions within andalusite. Monazite grains appear unzoned in BSE images.","SAMPLING_FEATURE_NAME":"DDH005","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH627934","BOREHOLE_TOP_DEPTH_M":168.89,"BOREHOLE_BASE_DEPTH_M":169.04,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.520077,"LONG_GDA94":135.95583,"ELEV_M_AHD":222,"ACCURACY_M":1000,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2018-06-19","SAMPLE_ORIGINATOR":"Schofield, A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73427","AGE_REF":"Clark, A.D., Morrissey, L.J., Doublier, M.P., Kositcin, N., Schofield, A., Skirrow, R.G., 2022. A newly recognised 1860-1840 Ma tectono-magmatic domain in the North Australia Craton: Insights from the Tennant Region, East Tennant area, and the Murphy Inlier. Precambrian Research, 375(1-4), 106652, 17p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2022.106652","AGE_ENTRY_DATE":"2022-04-11","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8350","geometry":{"type":"Point","coordinates":[144.26996418,-36.7649113]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8350,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370839","IGSN":"10273/AU7370839","SAMPLENO":7370839,"SAMPLE_ID":"CD11-21b","AGE_MA":450.3,"AGE_MA_UNCERTAINTY":4.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age giving age of vein formation. Total fusion age of 445 Ma. Samples analysed at either Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age 442 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age Saddle-shaped spectrum; 83% of 39Ar; MSWD=2.1;  We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_CD.9-11","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651994","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.7649112966,"LONG_GDA94":144.2699641841,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13161","geometry":{"type":"Point","coordinates":[133.3253,-19.9348]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13161,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6619660","IGSN":"10273/AU6619660","SAMPLENO":6619660,"SAMPLE_ID":"GS20PGF058","AGE_MA":1729,"AGE_MA_UNCERTAINTY":17,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.85,"NUMBER_OF_ANALYSES":6,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6447","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Thermal and/or fluid event associated with lead–zinc–copper mineralisation at ca 1730 Ma.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":30741,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU30741","STRAT_UNIT_NAME":"Warramunga Formation","INFORMAL_UNIT_NAME":"Lower Volcaniclastic Sandstone","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"fine grained siliciclastic rock","LITHOLOGY":"siltstone","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Sample GS20PGF058 is a meta-siltstone/mudstone with cm-thick beds, preserved graded bedding, and ill-defined cross bedding. It was collected from the interval 520.0-525.7 m, which is ~35 m down hole from the mineralised section. The mineralogy in the coarse-grained basal sections of the beds is dominated by quartz and sericite, with minor chlorite and scattered opaque minerals. There is 30-40%, 10-30 micron rounded- to anhedral quartz grains with undulose extinction hosted in a fine-grained, 1-5 micron sericite-chlorite-quartz (-feldspar) groundmass. In the fine-grained layers, there are 1-5%, 5-10 micron rounded quartz grains and 1-2%, 10-20 micron rounded chlorite-rich clasts, possibly after complete replacement of mafic minerals. There is a weak open foliation that cross-cuts the bedding at 15-20°, and occasional transposed micro-folds of quartz-rich layers that suggest some degree of shearing (Figure 2b). Kink-folding is noticed at the mm-scale with axial planar foliation at ~80° from the main foliation.","SAMPLING_FEATURE_NAME":"MXCURD002","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH628501","BOREHOLE_TOP_DEPTH_M":520,"BOREHOLE_BASE_DEPTH_M":525.7,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.9348,"LONG_GDA94":133.3253,"ELEV_M_AHD":291,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Northern Territory Geological Survey (NTGS)","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73460","AGE_REF":"Cross, A.J., Farias, P.G., Huston, D.L., 2022. Summary of results. Joint NTGS-GA geochronology project: Rover mineral field, Warramunga Province, July-December 2020. Northern Territory Geological Survey Record, 2022-005, 31p.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2022-06-01","AGE_LAST_UPDATED":"2022-06-14"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8955","geometry":{"type":"Point","coordinates":[143.52085012,-37.09983742]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8955,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370772","IGSN":"10273/AU7370772","SAMPLENO":7370772,"SAMPLE_ID":"94-02B1","AGE_MA":442.7,"AGE_MA_UNCERTAINTY":7.5,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Mean-weighted deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age, gives date for cleavage development. Minimum age on gradient of 420 Ma gives age of crenulation cleavage during reactivation.. Previous age of 439 +/-2 Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; whole rock phyllite; Recalculated age: No plateau; mean age (MSWD=3.1); This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977).","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":21209,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21209","STRAT_UNIT_NAME":"Beaufort Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Beaufort Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_94-02B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651966","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Stawell Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Stawell","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0998374179,"LONG_GDA94":143.5208501203,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9467","geometry":{"type":"Point","coordinates":[143.52085012,-37.09983742]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9467,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370772","IGSN":"10273/AU7370772","SAMPLENO":7370772,"SAMPLE_ID":"94-02B1","AGE_MA":439,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: VG3600","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"time of cleavage formation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":21209,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21209","STRAT_UNIT_NAME":"Beaufort Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Avoca Fault zone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_94-02B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651966","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Stawell Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Stawell","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0998374179,"LONG_GDA94":143.5208501203,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-04-27","AGE_LAST_UPDATED":"2021-10-12"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8956","geometry":{"type":"Point","coordinates":[143.52085012,-37.09983742]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8956,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370773","IGSN":"10273/AU7370773","SAMPLENO":7370773,"SAMPLE_ID":"94-02B2","AGE_MA":446.7,"AGE_MA_UNCERTAINTY":7.6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Mean-weighted deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age, gives date for cleavage development. Minimum age on gradient of 420 Ma gives age of crenulation cleavage during reactivation.. Previous age of 439 +/-2 Ma by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; whole rock phyllite; Recalculated age: No plateau; mean age (MSWD=3.1); We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":21209,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU21209","STRAT_UNIT_NAME":"Beaufort Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Beaufort Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_94-02B","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651966","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Stawell Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Stawell","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0998374179,"LONG_GDA94":143.5208501203,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8812","geometry":{"type":"Point","coordinates":[144.70349656,-36.93612197]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8812,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370774","IGSN":"10273/AU7370774","SAMPLENO":7370774,"SAMPLE_ID":"94-05C1","AGE_MA":461.1,"AGE_MA_UNCERTAINTY":7.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau dates early low-grade metamorphism and cleavage in Early Ordovician strata. Minimum age records reactivation and crenulation about 420 Ma. Location: 144.685E, 36.953S.Previous age of 457 +/-4 Ma (p, 67%) by (REF_ID: 29636) FOSTER, D.A., GRAY, D.R. and BUCHER, M., 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: Implications for the tectonic evolution of eastern Australia. Tectonics 18, pp. 452-485.  Recalculated age: Discordant; plateau age (50% of 39Ar; MSWD=1.2)  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977).. Locality not given in Foster et al. (1999). Sample collected by Vincent Morand. Maximum age on gradient.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_94-05C","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651967","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9361219656,"LONG_GDA94":144.703496558,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8851","geometry":{"type":"Point","coordinates":[147.20426452,-37.51646851]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8851,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370477","IGSN":"10273/AU7370477","SAMPLENO":7370477,"SAMPLE_ID":"T1","AGE_MA":413,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age relates to growth of metamorphic mica during shearing","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":23907,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23907","STRAT_UNIT_NAME":"Pinnak Sandstone","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Pinnak Sandstone","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"TABBERABBERA_T1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651767","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Tabberabbera Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Tabberabbera","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5164685132,"LONG_GDA94":147.2042645199,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8813","geometry":{"type":"Point","coordinates":[144.70349656,-36.93612197]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8813,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370775","IGSN":"10273/AU7370775","SAMPLENO":7370775,"SAMPLE_ID":"94-05C2","AGE_MA":462.5,"AGE_MA_UNCERTAINTY":7.2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau dates early low-grade metamorphism and cleavage in Early Ordovician strata. Minimum age records reactivation and crenulation about 420 Ma. Location: 144.685E, 36.953S.Previous age of 457 +/-4 Ma (p, 67%) by (REF_ID: 29636) FOSTER, D.A., GRAY, D.R. and BUCHER, M., 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: Implications for the tectonic evolution of eastern Australia. Tectonics 18, pp. 452-485.  Recalculated age: Discordant; plateau age (50% of 39Ar; MSWD=1.2)  We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010).. Sample collected by Vincent Morand. Locality given by Foster et al. (1999) plots about 5 km away.Age is a plateau mean.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_94-05C","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651967","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9361219656,"LONG_GDA94":144.703496558,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8876","geometry":{"type":"Point","coordinates":[143.83636366,-37.57836994]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8876,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370830","IGSN":"10273/AU7370830","SAMPLENO":7370830,"SAMPLE_ID":"BW-6A_929.5Ma","AGE_MA":465,"AGE_MA_UNCERTAINTY":6.6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphic age, good plateau. In Fig 11d the age is given as 463 +/- 1 Ma, in Table 1 it is given as 463 +/- 3 Ma.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age 71% of 39Ar; MSWD¼1.0; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Mix of metamorphic and detrital mica ages.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BW-6A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651992","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5783699424,"LONG_GDA94":143.8363636611,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8877","geometry":{"type":"Point","coordinates":[143.83636366,-37.57836994]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8877,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370831","IGSN":"10273/AU7370831","SAMPLENO":7370831,"SAMPLE_ID":"BW-6A_929.5Mb","AGE_MA":469.1,"AGE_MA_UNCERTAINTY":6.6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphic age, good plateau. In Fig 11d the age is given as 463 +/- 1 Ma, in Table 1 it is given as 463 +/- 3 Ma.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age 71% of 39Ar; MSWD¼1.0; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Mix of metamorphic and detrital mica ages.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Lancefieldian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BW-6A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651992","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5783699424,"LONG_GDA94":143.8363636611,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13222","geometry":{"type":"Point","coordinates":[135.8956725,-19.7756754]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13222,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7419732","IGSN":"10273/AU7419732","SAMPLENO":7419732,"SAMPLE_ID":"NDIBK10.009","AGE_MA":1843.5,"AGE_MA_UNCERTAINTY":5.1,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.23,"NUMBER_OF_ANALYSES":12,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6476","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"MinEx CRC NDI East Tennant","STRATNO":81848,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU81848","STRAT_UNIT_NAME":"Alroy Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"half core","SAMPLE_DESC":"Basement in NDIBK10 is characterised by polydeformed micaceous gneiss (paragneiss) and monzogranite. Zircons from the gneiss (GA 7419718, NDIBK10.005) yielded a maximum depositional age of 1867.5 ± 4.8 Ma and zircons from the monzogranite yielded an igneous crystallisation age of 1854.2 ± 5.3 Ma (GA 7419715, NDIBK10.004). The 1867.5 ± 4.8 Ma maximum deposition age, and the character of the age spectra, strongly suggest that the paragneiss in drill core NDIBK10 is part of the Alroy Formation.  The primary foliation in the gneiss is subvertical and strikes broadly northeast-southwest. The main foliation (S2) is a composite foliation, defined by a weak-to-moderate alignment of metamorphic minerals, segregated quartz-feldspar rich and mica-rich bands (S0 or S1?), and elongate pods of felsic igneous rock which are probably equivalent to the monzogranite. Mica-rich bands are dominated by biotite, with minor K-feldspar and white mica, and trace sillimanite; the more quartz-rich bands comprise quartz, feldspar and minor biotite and white mica. The transition between the bands is gradual. Biotite is partially replaced by chlorite, and many feldspar grains show signs of significant alteration to fine-grained white mica and hematite. Sample NDIBK10.009 is a mica-rich interval of paragneiss. It was selected to constrain the timing of peak amphibolite-facies metamorphism and deformation.","SAMPLING_FEATURE_NAME":"NDIBK10","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH650908","BOREHOLE_TOP_DEPTH_M":765.35,"BOREHOLE_BASE_DEPTH_M":765.6,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.7756754,"LONG_GDA94":135.8956725,"ELEV_M_AHD":223,"ACCURACY_M":3,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2021-03-05","SAMPLE_ORIGINATOR":"Schofield, A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73506","AGE_REF":"Kositcin, N., Clark, A.D., Doublier, M.P., 2022. New SHRIMP U-Pb geochronology of in situ monazites from the East Tennant area, Northern Territory: Results from the MinEx CRC National Drilling Initiative program. Geoscience Australia. Record, 2022/18, 30p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2022.018","AGE_ENTRY_DATE":"2022-06-23","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8342","geometry":{"type":"Point","coordinates":[144.25354008,-37.09516986]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8342,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371343","IGSN":"10273/AU7371343","SAMPLENO":7371343,"SAMPLE_ID":"WG-01a","AGE_MA":490,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Total gas age, giving age of metamorphism. Saddle shaped spectrum.This sample is referred to as WG-10 in Table 1 of Bierlein at al. 2001, Mineralium Deposita.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: Sigmoidal age spectrum; total-gas age=466 +/-6 Ma. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Chewtonian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_WG-01","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652292","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0951698637,"LONG_GDA94":144.2535400761,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. 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Saddle shaped spectrum.This sample is referred to as WG-10 in Table 1 of Bierlein at al. 2001, Mineralium Deposita.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: Sigmoidal age spectrum; total-gas age=466 +/-6 Ma. This age uses the standard ages reported by Renne et al. 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Economic Geology, 116(6), 1387-1407.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.4837","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12760","geometry":{"type":"Point","coordinates":[145.86145767,-42.12448493]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12760,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7930935","IGSN":"10273/AU7930935","SAMPLENO":7930935,"SAMPLE_ID":"FMC-1","AGE_MA":501.2,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.87,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic origin","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"lower concordia age (Wetherill)","AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":34211,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU34211","STRAT_UNIT_NAME":"Franklin Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Franklin Metamorphic Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"eclogite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"field site specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"FMC-1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS815919","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Tyennan Element","GEOLOGICAL_REGION_NAME":"Tyennan Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-42.1244849309,"LONG_GDA94":145.8614576733,"ELEV_M_AHD":null,"ACCURACY_M":10,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73367","AGE_REF":"Brown, D.A., Hand, M., Morrissey, L.J., 2021. Zircon petrochronology and mineral equilibria of the eclogites from western Tasmania: Interrogating the early Palaeozoic East Gondwana subduction record. 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Zircon petrochronology and mineral equilibria of the eclogites from western Tasmania: Interrogating the early Palaeozoic East Gondwana subduction record. 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Saddle shaped spectrum.This sample is referred to as WG-10 in Table 1 of Bierlein at al. 2001, Mineralium Deposita.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: discordant, sigmoidal age spectrum; total-gas age=466 +/-6 Ma. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. 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Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8345","geometry":{"type":"Point","coordinates":[144.25354008,-37.09516986]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8345,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371346","IGSN":"10273/AU7371346","SAMPLENO":7371346,"SAMPLE_ID":"WG-01d","AGE_MA":445,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent metamorphic syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Total gas age, giving age of metamorphism. Saddle shaped spectrum.This sample is referred to as WG-10 in Table 1 of Bierlein at al. 2001, Mineralium Deposita.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 463 +/-3 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: discordant, sigmoidal age spectrum; total-gas age=466 +/-6 Ma. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. 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Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8905","geometry":{"type":"Point","coordinates":[143.89532177,-37.55105901]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8905,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371349","IGSN":"10273/AU7371349","SAMPLENO":7371349,"SAMPLE_ID":"WH189_09","AGE_MA":416.1,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Plateau metamorphic not captured","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"EMP; 95% confidence; 2 sigma","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Bendigonian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_E","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651987","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5510590129,"LONG_GDA94":143.8953217657,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73066","AGE_REF":"Fairmaid, A.M., 2012, The timing and origin of orogenic gold mineralisation in the western Lachlan Orogen, southeast Australia: constraints from 40Ar/39Ar dating and halogen and noble gas geochemistry. PhD thesis, University of Melbourne.","AGE_PUBLICATION_LINKS":"http://hdl.handle.net/11343/37601","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.11309","geometry":{"type":"Point","coordinates":[145.40956873,-45.1604054]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":11309,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7931001","IGSN":"10273/AU7931001","SAMPLENO":7931001,"SAMPLE_ID":"136603","AGE_MA":495,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":2.4,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"EPMA: wavelength dispersive spectrometer (WDS)","ANALYTICAL_COLLECTION_SYSTEM":"EPMA: Cameca SX100 electron microprobe","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"dredge 12 - South Tasman Rise","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Two samples were from the same dredge haul (147/DR12) from the western edge of the South Tasman Rise, 200 km south of Port Davey. Sample 136603, biotite-quartz-feldspar gneiss, has a granoblastic polygonal texture in felsic bands, and decussate biotite in the mafic bands. The monazite crystals are elongate to rounded, with smooth grain boundaries, and are 5-20 um across. This sample was run twice, and the combined data yielded an age of 495 +/- 9 Ma with an MSWD of 2.4. One low age spot was excluded from the average because it visually lies outside the main peak. Like all the offshore samples, the monazite in this sample has a smooth REE pattern with a large negative Eu anomaly.","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-45.1604054015,"LONG_GDA94":145.4095687343,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"63433","AGE_REF":"Berry, R.F., Chmielowski, R.M., Steele, D.A., Meffre, S., 2007. Chemical U-Th-Pb monazite dating of the Cambrian Tyennan Orogeny, Tasmania. Australian Journal of Earth Sciences, 54(5), 757-771.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090701305269","AGE_ENTRY_DATE":"2022-03-21","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.11310","geometry":{"type":"Point","coordinates":[145.40956873,-45.1604054]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":11310,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7931002","IGSN":"10273/AU7931002","SAMPLENO":7931002,"SAMPLE_ID":"136604","AGE_MA":495,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.59,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"EPMA: wavelength dispersive spectrometer (WDS)","ANALYTICAL_COLLECTION_SYSTEM":"EPMA: Cameca SX100 electron microprobe","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"dredge 12 - South Tasman Rise","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Two samples were from the same dredge haul (147/DR12) from the western edge of the South Tasman Rise, 200 km south of Port Davey. Sample 136604 is quartz-biotite-muscovite gneiss. The monazite grains are rounded and 10-40 um. They yielded an age of 495 +/- 6 Ma with an MSWD of 0.59. All grains have high Y compatible with the absence of garnet in the sample. Berry et al. (1997) reported a K/Ar biotite age of 469 +/- 4 Ma for this rock, which means sample 136604 is the same rock as 147/DR12/A of Berry et al. (1997).","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-45.1604054015,"LONG_GDA94":145.4095687343,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"63433","AGE_REF":"Berry, R.F., Chmielowski, R.M., Steele, D.A., Meffre, S., 2007. Chemical U-Th-Pb monazite dating of the Cambrian Tyennan Orogeny, Tasmania. 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The monazite crystals are irregular to rounded 20 um grains. All analyses are compatible with a single age population. They yielded an age of 493 +/- 11 Ma with an MSWD of 1.4 using all data points. Berry et al. (1997) reported a K/Ar biotite age of 457 +/- 4 Ma for this rock, which means sample 136630 is the same rock as SO36-44-1.6 of Berry et al. 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Australian Journal of Earth Sciences, 52(3), 461-471.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090500134514","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13223","geometry":{"type":"Point","coordinates":[136.2903606,-19.5341998]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13223,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7419425","IGSN":"10273/AU7419425","SAMPLENO":7419425,"SAMPLE_ID":"NDIBK04.300","AGE_MA":1831,"AGE_MA_UNCERTAINTY":28,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.09,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6474","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":"MinEx CRC NDI East Tennant","STRATNO":81848,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU81848","STRAT_UNIT_NAME":"Alroy Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"quarter core","SAMPLE_DESC":"The basement rocks encountered in drill-hole NDIBK04 can be subdivided into three lithologies: an upper unit comprised of metamorphosed bands of alternating Fe-rich and Si-rich sediment, a middle interval of marble, and a lower interval of phyllite. Unimodal U-Pb detrital zircon maximum deposition ages of 1894.2 ± 3.4 and 1969 ± 10 Ma have been obtained from the upper banded unit and lower phyllite, respectively. These ages are atypical in the area, and suggest that basement in NDIBK04 is significantly older than the Alroy Formation, which underlies much of the East Tennant region. The lower unit in NDIBK04, which is more pelitic in composition than the upper two units, is more amenable to tectono-metamorphic investigation. It extends from 236 m down-hole depth until the end of hole at 416 m down-hole depth. Sample NDIBK04.300 was selected from this lower unit as it contained the best-preserved monazite of all the thin sections examined from this drill core. Sample NDIBK04.300 was collected from 386.15–386.25 metres down-hole depth. The main structural and metamorphic characteristics of this sample are representative of the broader interval of metapelite in the lower unit in NDIBK04. A strong tectono-metamorphic fabric is present throughout NDIBK04, especially within the lower unit. This fabric strikes northeast-southwest and its dip varies from steep, towards the northeast, to subvertical. The fabric is comprised of remnant primary sedimentological bedding (S0) that has been locally reworked by a penetrative shear fabric that consists of aligned bands of muscovite and biotite and minor chlorite, interfoliated with less pelitic bands dominated by quartz, feldspar and sulphides. Common quartz-sulphide veins are overprinted by, and help define, the main fabric. Chlorite is present, but is less abundant than muscovite and biotite. Andalusite and chloritoid are also present locally. Garnet is abundant.","SAMPLING_FEATURE_NAME":"NDIBK04","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH650764","BOREHOLE_TOP_DEPTH_M":386.15,"BOREHOLE_BASE_DEPTH_M":386.25,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.5341998,"LONG_GDA94":136.2903606,"ELEV_M_AHD":270,"ACCURACY_M":3,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2021-03-04","SAMPLE_ORIGINATOR":"Schofield, A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73506","AGE_REF":"Kositcin, N., Clark, A.D., Doublier, M.P., 2022. New SHRIMP U-Pb geochronology of in situ monazites from the East Tennant area, Northern Territory: Results from the MinEx CRC National Drilling Initiative program. Geoscience Australia. Record, 2022/18, 30p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.11636/Record.2022.018","AGE_ENTRY_DATE":"2022-06-23","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8702","geometry":{"type":"Point","coordinates":[145.88103859,-37.2862629]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8702,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7370952","IGSN":"10273/AU7370952","SAMPLENO":7370952,"SAMPLE_ID":"GA217b","AGE_MA":355,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"not captured","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Single mineral isochron deformation minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26879,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26879","STRAT_UNIT_NAME":"Rubicon Rhyolite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Rubicon Rhyolite / Cerberean Volcanics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid volcanic rock","LITHOLOGY":"rhyolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_GA217","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652042","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.286262897,"LONG_GDA94":145.8810385866,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73051","AGE_REF":"McDougall, I., Compston, W., Bofinger, V.M., 1966. Isotopic Age Determinations on Upper Devonian Rocks from Victoria, Australia: A Revised Estimate for the Age of the Devonian-Carboniferous Boundary. Geological Society of America Bulletin, 77(10), 1075-1088.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1130/0016-7606(1966)77[1075:IADOUD]2.0.CO;2","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8294","geometry":{"type":"Point","coordinates":[144.07323228,-36.98353102]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8294,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371038","IGSN":"10273/AU7371038","SAMPLENO":7371038,"SAMPLE_ID":"LSR-01c","AGE_MA":425,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron age for a hump-shaped spectrum.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).Previous age of 373 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  no age plateau; discordant age spectrum; total-gas age=375+/-5 Ma. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Good plateau age.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LSR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652095","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9835310162,"LONG_GDA94":144.0732322819,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8295","geometry":{"type":"Point","coordinates":[144.07323228,-36.98353102]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8295,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371039","IGSN":"10273/AU7371039","SAMPLENO":7371039,"SAMPLE_ID":"LSR-01d","AGE_MA":375,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron age for a hump-shaped spectrum.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 373 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  no age plateau; discordant age spectrum; total-gas age=375+/-5 Ma. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LSR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652095","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9835310162,"LONG_GDA94":144.0732322819,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8296","geometry":{"type":"Point","coordinates":[144.07323228,-36.98353102]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8296,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371040","IGSN":"10273/AU7371040","SAMPLENO":7371040,"SAMPLE_ID":"LSR-H5a","AGE_MA":430,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Samples consisting of whole rock chips and pure mineral separates were degassed using either a laser or the high precision double vacuum furnace step heating method and were analysed using a VG3600 mass spectrometer with a Daly photomultiplier at the 40Ar/39 Ar facilities at Dalhousie University, Nova Scotia, and at La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 369 +/-5 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  no age plateau; discordant age spectrum; total-gas age=396+/-5 Ma. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977)","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"psammopelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LSR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652095","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9835310162,"LONG_GDA94":144.0732322819,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8827","geometry":{"type":"Point","coordinates":[146.24561037,-37.56860481]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8827,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371095","IGSN":"10273/AU7371095","SAMPLENO":7371095,"SAMPLE_ID":"MORNING STARa","AGE_MA":374.3,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Alteration sericite in mineralised dyke. Good plateau over 90% of gas release.. Previous age 374 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: 98% of 39Ar; MSWD=0.6. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). A number of gold deposits in Woods Point Goldfield are associated with the Woods Point Dyke swarm which suggests magmatism + hydrothermal alteration associated with gold mineralisation are closely related. However existing data insufficient to determine exact time interval. ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":20527,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU20527","STRAT_UNIT_NAME":"Woods Point Dyke Swarm","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Woods Point Dyke Swarm","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_MORNING STAR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652128","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5686048093,"LONG_GDA94":146.2456103697,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8381","geometry":{"type":"Point","coordinates":[144.70688398,-36.69509885]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8381,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371222","IGSN":"10273/AU7371222","SAMPLENO":7371222,"SAMPLE_ID":"T1d","AGE_MA":305,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"From mineralisation associated with a post-tectonic dyke and with the Toolleen gold desposit. Minimum age for final deformation in fault zone. Saddle-shaped spectrum indicates some recoil - date should probably have a much larger error on it. Sericite from pervasively altered wall rock to a gold-bearing quartz vein from the Toolleen mine gives a mean age of 382 +/-3 Ma, for 80% of the 39Ar released. Previous age of 382 +/-3 Ma (p, 90%) by (REF_ID: 29755) FOSTER, D.A., GRAY, D.R., KWAK, T.A.P. and BUCHER, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250;  Recalculated age: Discordant age spectrum; total-gas age=376+5 Ma; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. 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Rare, rounded lithic clasts indicate that the metasedimentary protolith was, in part, clastic. The primary fabric of the sedimentary protolith has been overprinted by amphibolite-facies metamorphism and deformation. Abundant metamorphic cordierite growth in some lithological bands has led to grain size inversion, with the more pelitic beds now relatively coarse-grained and locally resembling a porphyritic volcanic rock in appearance. Less pelitic intervals, in contrast, have not supported the growth of coarse-grained metamorphic minerals, and now represent relatively fine-grained intervals in drill core. The protolith of the sequence is interpreted to have been well-bedded sandstone, siltstone and mudstone.","SAMPLING_FEATURE_NAME":"NDIBK01","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH648462","BOREHOLE_TOP_DEPTH_M":196.3,"BOREHOLE_BASE_DEPTH_M":196.5,"GEOLOGICAL_PROVINCE":"Warramunga Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-19.57187838,"LONG_GDA94":136.1255559,"ELEV_M_AHD":224,"ACCURACY_M":3,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2021-03-03","SAMPLE_ORIGINATOR":"Schofield, A.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73506","AGE_REF":"Kositcin, N., Clark, A.D., Doublier, M.P., 2022. New SHRIMP U-Pb geochronology of in situ monazites from the East Tennant area, Northern Territory: Results from the MinEx CRC National Drilling Initiative program. Geoscience Australia. 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The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 369 +/-5 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  no age plateau; discordant age spectrum; total-gas age=396+/-5 Ma. This age uses the standard ages reported by Renne et al. 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Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. 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Minimum age due either to contact metamorphism or formation of the fault. Lithology in original ref noted as Sericite from D fault surface.  Samples analysed Dalhousie University, Nova Scotia, and at La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of > 396 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: ecalculated age:  Discordant age spectrum; total-gas age; hightemperature ages ca 400 Ma. We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). It is unclear whether the differences in ages and discordance are due to partial overprinting by the Tarnagulla granite, recoil effects (related to the fine grainsize of the whole rock samples) or the presence of older detrital/metamorphic micas. Thus, the available age data only constrain the timing of gold mineralisation at Tarnagulla to ca 400 Ma or older. Thus, the available age data only constrain the timing of gold mineralisation at Tarnagulla to ca 400 Ma or older.  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Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8609","geometry":{"type":"Point","coordinates":[148.80047709,-37.09219044]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8609,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371272","IGSN":"10273/AU7371272","SAMPLENO":7371272,"SAMPLE_ID":"VAD 111","AGE_MA":422,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"Model deformation minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Biotite shows evidence of kinking and fracture. Constants used in the calculation are: lambda-epsilon=0.581 X 10e-10 yr-1; lambda-beta= 4.962 x10e-10 yr-1; 40K = 0.01167 atom %","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":8753,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU8753","STRAT_UNIT_NAME":"Iona Tonalite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Iona Tonalite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"KUARK_VAD 111","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652237","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kuark Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Kuark","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0921904397,"LONG_GDA94":148.8004770885,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73065","AGE_REF":"Henley, K.J., Webb, A., 1990. Radiometric dating on various granites and Newer Volcanics basalts. Geological Survey of Victoria, Unpublished Report, 1990/27, 23pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:3355","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8611","geometry":{"type":"Point","coordinates":[148.89019236,-37.39632565]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8611,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371274","IGSN":"10273/AU7371274","SAMPLENO":7371274,"SAMPLE_ID":"VAD 113","AGE_MA":386,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Hornblende","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"Model metamorphic minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Extensive recrystallisation. Constants used in the calculation are: lambda-epsilon=0.581 X 10e-10 yr-1; lambda-beta= 4.962 x10e-10 yr-1; 40K = 0.01167 atom %","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":18327,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU18327","STRAT_UNIT_NAME":"Tommy Roundhead Granodiorite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Tommy Roundhead Granodiorite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"KUARK_VAD 113","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652239","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kuark Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Kuark","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3963256523,"LONG_GDA94":148.8901923559,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73065","AGE_REF":"Henley, K.J., Webb, A., 1990. 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Constants used in the calculation are: lambda-epsilon=0.581 X 10e-10 yr-1; lambda-beta= 4.962 x10e-10 yr-1; 40K = 0.01167 atom %","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":23395,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU23395","STRAT_UNIT_NAME":"Blue Gum Tonalite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Blue Gum Tonalite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"tonalite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MALLACOOTA_VAD 115","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652240","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mallacoota Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Mallacoota","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.483227525,"LONG_GDA94":148.9930325743,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73065","AGE_REF":"Henley, K.J., Webb, A., 1990. 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Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250; Recalculated age: Staircase age spectrum; 74% 39Ar; MSWD=1.0; This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Consistent with timing gold mineralisation, however needs to be verified. . 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Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. 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Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar-39Ar results. Ore Geology Reviews 13, pp. 229-250;  Recalculated age: Staircase age spectrum; 74% 39Ar; MSWD=1.0; We have used the new decay constants, isotopic ratios and standard ages proposed by Renne et al. (2010). Consistent with timing gold mineralisation, however needs to be verified. . Date is averaged with samples 206 and 165","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Chewtonian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LTU-12006","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652097","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.0952159252,"LONG_GDA94":144.2535834103,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8373","geometry":{"type":"Point","coordinates":[144.33997806,-37.1942142]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8373,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371033","IGSN":"10273/AU7371033","SAMPLENO":7371033,"SAMPLE_ID":"LSDDH13_158.9M_LS2LA","AGE_MA":375,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Mean hydrothermal alteration syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Note: mean (14 out of 16 steps, no plateau). Mean=374.9+/-1.5 [0.40%] 95% conf. Wtd by data-pt errors only, 2 of 16 rej. MSWD=2.0, probability=0.014. Furnace step-heating.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LSDDH13","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652094","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.1942142048,"LONG_GDA94":144.3399780647,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73054","AGE_REF":"Fu, B., Fairmaid, A.M., Phillips, D., 2009. New 40Ar/39Ar geochronology of gold deposits in central Victoria: final report. GeoScience Victoria Gold Undercover Report, 19, 31pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:36638","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8857","geometry":{"type":"Point","coordinates":[147.68252554,-37.20800873]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8857,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371102","IGSN":"10273/AU7371102","SAMPLENO":7371102,"SAMPLE_ID":"OM14","AGE_MA":407,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Fault Rock","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"fault or shear rock","LITHOLOGY":"mylonite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"OMEO_OM14","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652132","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Central NSW - Omeo Province","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Omeo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.2080087346,"LONG_GDA94":147.6825255369,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"60412","AGE_REF":"Foster, D.A., Gray, D.R., Kwak, T.A.P., Bucher, M., 1998. Chronology and tectonic framework of turbidite-hosted gold deposits in the Western Lachlan Fold Belt, Victoria: 40Ar/39Ar results. Ore Geology Reviews, 13, 229-250.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0169-1368(97)00020-6","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8904","geometry":{"type":"Point","coordinates":[143.89532177,-37.55105901]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8904,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371103","IGSN":"10273/AU7371103","SAMPLENO":7371103,"SAMPLE_ID":"PRD385_25","AGE_MA":400,"AGE_MA_UNCERTAINTY":23,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"White mica","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation not captured","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"EMP; 95% confidence; 2 sigma; Timing of fault movement","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":36202,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36202","STRAT_UNIT_NAME":"Castlemaine Group","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Castlemaine Group - Bendigonian","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"fault or shear rock","LITHOLOGY":"fault or shear rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_BALL_E","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS651987","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.5510590129,"LONG_GDA94":143.8953217657,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73066","AGE_REF":"Fairmaid, A.M., 2012, The timing and origin of orogenic gold mineralisation in the western Lachlan Orogen, southeast Australia: constraints from 40Ar/39Ar dating and halogen and noble gas geochemistry. PhD thesis, University of Melbourne.","AGE_PUBLICATION_LINKS":"http://hdl.handle.net/11343/37601","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8608","geometry":{"type":"Point","coordinates":[148.79838167,-37.38333787]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8608,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371281","IGSN":"10273/AU7371281","SAMPLENO":7371281,"SAMPLE_ID":"VAD 122","AGE_MA":386,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"Model deformation minimum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Biotite is fresh, coarser grains may not be affected by deformation event. Constants used in the calculation are: lambda-epsilon=0.581 X 10e-10 yr-1; lambda-beta= 4.962 x10e-10 yr-1; 40K = 0.01167 atom %","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":6095,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU6095","STRAT_UNIT_NAME":"Ellery Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Ellery Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"KUARK_VAD 122","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652245","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Kuark Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Kuark","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.3833378732,"LONG_GDA94":148.7983816665,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73065","AGE_REF":"Henley, K.J., Webb, A., 1990. Radiometric dating on various granites and Newer Volcanics basalts. Geological Survey of Victoria, Unpublished Report, 1990/27, 23pp.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:3355","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8925","geometry":{"type":"Point","coordinates":[143.83533352,-36.77108476]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8925,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371236","IGSN":"10273/AU7371236","SAMPLENO":7371236,"SAMPLE_ID":"TADF-01a","AGE_MA":409.7,"AGE_MA_UNCERTAINTY":5.4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"total gas","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Total gas deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron age from a reverse stepping spectrum. Minimum age due either to contact metamorphism or formation of the fault. Lithology in original ref noted as Sericite from D fault surface.  Samples analysed Dalhousie University, Nova Scotia, and at La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of > 396 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  Discordant age spectrum; total-gas age; hightemperature ages ca 400 Ma. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). It is unclear whether the differences in ages and discordance are due to partial overprinting by the Tarnagulla granite, recoil effects (related to the fine grainsize of the whole rock samples) or the presence of older detrital/metamorphic micas. Thus, the available age data only constrain the timing of gold mineralisation at Tarnagulla to ca 400 Ma or older.  Thus, the available age data only constrain the timing of gold mineralisation at Tarnagulla to ca 400 Ma or older. ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"fault or shear rock","LITHOLOGY":"fault or shear rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_TAPR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652210","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.7710847605,"LONG_GDA94":143.8353335183,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8841","geometry":{"type":"Point","coordinates":[146.44769315,-37.94263405]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8841,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371047","IGSN":"10273/AU7371047","SAMPLENO":7371047,"SAMPLE_ID":"LTU-12558","AGE_MA":371.9,"AGE_MA_UNCERTAINTY":5.8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"plateau","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Sericite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Plateau deformation syn","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Plateau age over 85% of gas release, though some discordance possibly due to recoil in low temperature steps. The original published location (146.4588E, 37.9448S) plots about 1 km east of Walhalla Mine. Sericite from mineralisated associated with the post tectonic Woods Point dike swarm; the plateau age defines the end of major thrusting. Previous age of 372 +/-2 Ma (p, 85%) by (REF_ID: 29636) FOSTER, D.A., GRAY, D.R. and BUCHER, M., 1999. Chronology of deformation within the turbidite-dominated, Lachlan orogen: Implications for the tectonic evolution of eastern Australia. Tectonics 18, pp. 452-485.  Recalculated age: 68% of 39Ar; MSWD=0.6.  This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). ","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":26039,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26039","STRAT_UNIT_NAME":"Montys Hut Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Montys Hut Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"MELBOURNE_LTU-12558","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652098","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Melbourne-Mathinna Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Melbourne","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-37.9426340459,"LONG_GDA94":146.4476931525,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. Australian Journal of Earth Sciences, 59(4), 495-525.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2012.682738","AGE_ENTRY_DATE":"2021-03-11","AGE_LAST_UPDATED":"2022-03-02"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.8292","geometry":{"type":"Point","coordinates":[144.07323228,-36.98353102]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":8292,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7371036","IGSN":"10273/AU7371036","SAMPLENO":7371036,"SAMPLE_ID":"LSR-01a","AGE_MA":420,"AGE_MA_UNCERTAINTY":null,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"apparent age","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"La Trobe University","AGE_INTERPRETED_FROM_SOURCE":"Apparent hydrothermal alteration maximum","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron age for a hump-shaped spectrum.  Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).Previous age of 373 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age: no age plateau; discordant age spectrum; total-gas age=375+/-5 Ma. This age uses the standard ages reported by Renne et al. (1998) and the decay constants and isotopic ratios recommended by Steiger and Jaeger (1977). Date is average with samples 206 and 126. Detrtital zircons dated.","AGE_SOURCE":"GSV/GA compilation doi: 10.11636/Record.2021.024","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein quartz","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"BENDIGO_LSR","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS652095","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Bendigo Zone","GEOLOGICAL_REGION_NAME":"Lachlan Region","REGION_NAME_SOURCE":"Bendigo","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.9835310162,"LONG_GDA94":144.0732322819,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Lane, J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67978","AGE_REF":"Phillips, D., Fu, B., Wilson, C.J.L., Kendrick, M.A., Fairmaid, A.M., Miller, J.McL., 2012. Timing of gold mineralisation in the western Lachlan Orogen, SE Australia: A critical overview. 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Samples analysed at Dalhousie University, Nova Scotia or La Trobe University, Melbourne. The 40Ar/39Ar methodology used for samples analysed at Dalhousie University is the furnace step-heating method described by McDougall and Harrison (1988) and Muecke et al 1988. The analytical procedures for the samples analysed at La Trobe University follow those described by Foster et al, (1999). Apparent age plateaux are defined as in McDougall and Harrison (1988).. Previous age of 373 +/-2 Ma by (REF_ID: 34428) BIERLEIN, F.P., ARNE, D.C., FOSTER, D.A. and REYNOLDS, P., 2001. A geochronological framework for orogenic gold mineralisation in central Victoria, Australia. Mineralium Deposita 36, pp. 741-767; Recalculated age:  no age plateau; discordant age spectrum; total-gas age=375+/-5 Ma. This age uses the standard ages reported by Renne et al. 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All three samples from SO36-44 yielded a K/Ar biotite age in the range 458-444 Ma; SO36-44-3 also yielded a K/Ar muscovite age of c. 460 Ma.","SAMPLING_FEATURE_NAME":"AGSO 58 SONNE 36B MSS","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-47.402617,"LONG_GDA94":145.17195,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12569","geometry":{"type":"Point","coordinates":[149.0166667,-45.71666667]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12569,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935774","IGSN":"10273/AU7935774","SAMPLENO":7935774,"SAMPLE_ID":"147/DR38/G","AGE_MA":788,"AGE_MA_UNCERTAINTY":60,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not reported","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"EPMA: wavelength dispersive spectrometer (WDS)","ANALYTICAL_COLLECTION_SYSTEM":"EPMA: unknown model","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"closure age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Rig Seismic AGSO Cruise 147. (Exon et al 1995. Record 1995/056).","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau (Metamorphic and sedimentary basement rocks)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Sample DR38G is a single block of gneiss in a dredge dominated by basaltic hyaloclastite. The dredge was located towards the top of what has been identified as a basaltic seamount. The simplest interpretation is that this sample represents a xenolith. The coarse-grained gneissic mineralogy in DR38G gives a similar calculated P/T (730C, 500 MPa) condition to those determined for the other gneisses. The major differences are that muscovite is absent, and that rare sillimanite grains are surrounded by an outer corona of An41 plagioclase (cf. An33 in the matrix) and an inner corona composed of a symplectite of hercynite completely enclosed by cordierite. Nearby garnets are largely replaced by biotite. Sillimanite, quartz and orthoclase without muscovite implies that the early assemblage lies above the quartz/muscovite breakdown reaction. Cordierite mantling sillimanite would normally indicate a decompressional reaction. If spinel is in equilibrium with quartz, this decompression would need to be at very high temperatures; however, in DR38G, no example could be found where spinel is in direct contact with quartz. Owen (1991) concluded that similar textures are the result of localised areas of low quartz activity formed in response to the growth of cordierite, leading to spinel inclusions. The rocks he described are granulite facies orthogneiss, similar to DR38G, in the contact aureole of younger intrusions. In this case, the cordierite composition may be in equilibrium with the garnet and biotite. The Nichols et al. (1992) calibration of the cordierite-garnet geothermometer and geobarometer indicates reaction at 600C and 260 MPa (assuming anhydrous cordierite). The spinel-cordierite Fe/Mg geothermometer (Nichols et al. 1992) also suggests a low temperature (520C). The breakdown of garnet and crystallisation of cordierite along with spinel and more An-rich plagioclase indicates a decompressional P/T path which has not been recognised in the other gneisses.","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-45.71666667,"LONG_GDA94":149.0166667,"ELEV_M_AHD":null,"ACCURACY_M":750,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12583","geometry":{"type":"Point","coordinates":[145.628275,-43.774717]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12583,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935786","IGSN":"10273/AU7935786","SAMPLENO":7935786,"SAMPLE_ID":"SO36-28.1","AGE_MA":345,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"BGR Hanover Germany","AGE_INTERPRETED_FROM_SOURCE":"metamorphism related to a large Devonian granite pluton","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Sonne cruise 36B, 1985. Decay constant used: Steiger & Jager (1977). Note: named in Table 3 of publication also as sample SO38-28.1","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Sonne dredge samples from the continental slope off the west coast of Tasmania (SO36-28 and SO36-29) are chlorite zone phyllites with an intense crenulation cleavage overprinting an early schistosity. These have red weathering spots originally identified as garnet; however, in thin-section, these are seen to be strongly altered carbonate (?siderite) porphyroblasts which are post-kinematic with respect to the S2 crenulation cleavage (SO36-28.3). Similar deeply weathered rocks have been reported from the Port Davey area of western Tasmania (Spry & Baker 1965). The samples from SO36-28 and SO36-29 have ca 350 Ma K/Ar muscovite ages. Most of the measured Precambrian rocks have K/Ar ages older than this, but they show a strong Devonian resetting (Turner et al. 1995). Samples SO36-28 and SO36-29, from the continental margin off Port Davey, probably reflect metamorphism related to a large Devonian granite pluton (Leaman & Richardson 1992) which underlies much of southwestern Tasmania. This granite is also likely to be the cause of the carbonate porphyroblasts which overprint the crenulation cleavage in SO36-28.3.","SAMPLING_FEATURE_NAME":"AGSO 58 SONNE 36B MSS","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-43.774717,"LONG_GDA94":145.628275,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12584","geometry":{"type":"Point","coordinates":[145.628275,-43.774717]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12584,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935786","IGSN":"10273/AU7935786","SAMPLENO":7935786,"SAMPLE_ID":"SO36-28.1","AGE_MA":350,"AGE_MA_UNCERTAINTY":3,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"BGR Hanover Germany","AGE_INTERPRETED_FROM_SOURCE":"metamorphism related to a large Devonian granite pluton","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Sonne cruise 36B, 1985. Decay constant used: Steiger & Jager (1977). Note: named in Table 3 of publication also as sample SO38-28.1","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Sonne dredge samples from the continental slope off the west coast of Tasmania (SO36-28 and SO36-29) are chlorite zone phyllites with an intense crenulation cleavage overprinting an early schistosity. These have red weathering spots originally identified as garnet; however, in thin-section, these are seen to be strongly altered carbonate (?siderite) porphyroblasts which are post-kinematic with respect to the S2 crenulation cleavage (SO36-28.3). Similar deeply weathered rocks have been reported from the Port Davey area of western Tasmania (Spry & Baker 1965). The samples from SO36-28 and SO36-29 have ca 350 Ma K/Ar muscovite ages. Most of the measured Precambrian rocks have K/Ar ages older than this, but they show a strong Devonian resetting (Turner et al. 1995). Samples SO36-28 and SO36-29, from the continental margin off Port Davey, probably reflect metamorphism related to a large Devonian granite pluton (Leaman & Richardson 1992) which underlies much of southwestern Tasmania. This granite is also likely to be the cause of the carbonate porphyroblasts which overprint the crenulation cleavage in SO36-28.3.","SAMPLING_FEATURE_NAME":"AGSO 58 SONNE 36B MSS","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-43.774717,"LONG_GDA94":145.628275,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.9487","geometry":{"type":"Point","coordinates":[141.40694063,-36.669887]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":9487,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7533500","IGSN":"10273/AU7533500","SAMPLENO":7533500,"SAMPLE_ID":"4691","AGE_MA":493,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: two-stage column separation","ANALYTICAL_COLLECTION_SYSTEM":"AAS: unknown model","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"not recorded","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":"Isotopic Atlas of Australia (EFTF)","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"biotite schist","UNIT_NAME_SOURCE":"biotite schist","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":"intrusion","SAMPLE_TYPE":"core","SAMPLE_DESC":"Biotite schist, metamorphic mica","SAMPLING_FEATURE_NAME":"VIMP13","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH654486","BOREHOLE_TOP_DEPTH_M":307,"BOREHOLE_BASE_DEPTH_M":308,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":"Glenelg","STATE":"VIC","COUNTRY":"AUS","LAT_GDA94":-36.6698869979,"LONG_GDA94":141.4069406271,"ELEV_M_AHD":150,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73118","AGE_REF":"Maher, S., Moore, D.H., Crawford, A.J., Twyford, R., Fanning, C.M., 1997. Victorian Initiative for Minerals and Petroleum: Test drilling of the southern margin of the Murray Basin. VIMP Report, 52, 275p.","AGE_PUBLICATION_LINKS":"https://gsv.vic.gov.au/searchAssistant/document.php?q=parent_id:28600","AGE_ENTRY_DATE":"2021-04-27","AGE_LAST_UPDATED":"2021-10-12"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13344","geometry":{"type":"Point","coordinates":[145.588418,-42.050979]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13344,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7942950","IGSN":"10273/AU7942950","SAMPLENO":7942950,"SAMPLE_ID":"92-106","AGE_MA":383.7,"AGE_MA_UNCERTAINTY":0.5,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":14,"CALCULATION_TYPE":"total gas","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"furnace: unknown model","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: model unknown","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"granitoid emplacement and hydrothermal alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":13057,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13057","STRAT_UNIT_NAME":"Mount Read Volcanics","INFORMAL_UNIT_NAME":"Mount Lyell Cu deposits, Great Lyell fault, Prince Lyell","UNIT_NAME_SOURCE":"Mount Lyell Cu deposits, Great Lyell fault, Prince Lyell","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Muscovite schist, Great Lyell Fault, Prince Lyell.","SAMPLING_FEATURE_NAME":"DDH637","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH861571","BOREHOLE_TOP_DEPTH_M":147.5,"BOREHOLE_BASE_DEPTH_M":148.5,"GEOLOGICAL_PROVINCE":"Dundas Element","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-42.050979,"LONG_GDA94":145.588418,"ELEV_M_AHD":548,"ACCURACY_M":1000,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Perkins, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73586","AGE_REF":"Perkins, C., 1996. 40Ar/39Ar age constraints on deformation and mineralization, Rosebery Zn-Pb-Cu and Mount Lyell Cu deposits, Tasmania, Australia. Mineralium Deposita, 31(1), 71-83.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1007/BF00225397","AGE_ENTRY_DATE":"2022-08-15","AGE_LAST_UPDATED":"2022-12-09"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12570","geometry":{"type":"Point","coordinates":[144.5677778,-44.00194444]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12570,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935775","IGSN":"10273/AU7935775","SAMPLENO":7935775,"SAMPLE_ID":"147/DR04/B5","AGE_MA":452,"AGE_MA_UNCERTAINTY":48,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not reported","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"EPMA: wavelength dispersive spectrometer (WDS)","ANALYTICAL_COLLECTION_SYSTEM":"EPMA: unknown model","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Rig Seismic AGSO Cruise 147. (Exon et al 1995. Record 1995/056).","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"mylonite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Pelitic mylonite DR04B5 has a strong L/S fabric, with the foliation defined by orientation of muscovite, sillimanite and zones of fine-grained recrystallised quartz and feldspar. The sillimanite and the stretched feldspar grains define a lineation. In thin section, the rock has a well-developed mylonite texture with rotated and recrystallised porphyroclasts of feldspar and garnet, ribbon quartz, boudinaged sillimanite and shear-band development. The mineralogy is quartz-plagioclase-biotite-muscovite-sillimanite-garnet-Kfeldspar. Sillimanite is locally retrogressed to sericite but the rock, as a whole, has remarkable preservation of high-temperature strain textures and mineralogy. There is no evidence of post-kinematic annealing of the dynamic recrystallisation textures of quartz. Sample DR04B5 has unzoned garnet. The biotite (3.5% TiO2) and plagioclase (An35) are consistent with textural evidence that this rock was deformed at upper amphibolite facies conditions. The textural evidence for stable coexistence of quartz, muscovite, sillimanite and K feldspar indicates the P/T condition during mylonite textural development was on the quartz-muscovite breakdown reaction. Geothermometry and geobarometry indicate that mylonite formation occurred at 650C and 550 MPa.","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-44.00194444,"LONG_GDA94":144.5677778,"ELEV_M_AHD":null,"ACCURACY_M":750,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12573","geometry":{"type":"Point","coordinates":[147.4347222,-44.6513889]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12573,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935778","IGSN":"10273/AU7935778","SAMPLENO":7935778,"SAMPLE_ID":"147/DR45/A","AGE_MA":511,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"cooling age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Rig Seismic AGSO Cruise 147. (Exon et al 1995. Record 1995/056). Decay constant used: Steiger & Jager (1977)","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Eastern Orthogneiss - sample DR45A","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"The most common basement rock type is a gneissic rock with quartz, plagioclase, K-feldspar, biotite, muscovite and garnet. Chlorite is a common minor phase replacing biotite and garnet. A second generation of retrograde muscovite is also present. Sample DR45A has An28 plagioclase and Ab13 orthoclase. Coarse-grained early muscovite is common. The garnet has very high MnO contents (9.3%) with a slightly depleted rim. Garnet rim compositions combined with matrix biotite implies a cooling temperature of 600C at about 400 MPa.","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-44.6513889,"LONG_GDA94":147.4347222,"ELEV_M_AHD":null,"ACCURACY_M":750,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12571","geometry":{"type":"Point","coordinates":[147.3341667,-45.51777778]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12571,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935779","IGSN":"10273/AU7935779","SAMPLENO":7935779,"SAMPLE_ID":"147/DR50/A1","AGE_MA":451,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Biotite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"Australian Mineral Development Laboratories, South Australia","AGE_INTERPRETED_FROM_SOURCE":"cooling age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Rig Seismic AGSO Cruise 147. 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The garnets have high pyrope components reflecting the overall Mg-rich composition of the rock. The garnet has a very narrow rim of lower Mg, with relatively flat Ca and Mn across most of the grain. Using the rim compositions, the rock cooled through 630C at 400 MPa; using matrix minerals and core garnet compositions, apparent conditions of 750C and 500 MPa are indicated. The flat Ca and Mn profile of the garnet is most consistent with a diffusive re-equilibration during metamorphism. However Spear (1991) argued that garnets of this grainsize cannot preserve Fe/Mg exchange temperatures of 750C at any realistic cooling rate. 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Mineralium Deposita, 31(1), 71-83.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1007/BF00225397","AGE_ENTRY_DATE":"2022-08-15","AGE_LAST_UPDATED":"2022-12-09"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13355","geometry":{"type":"Point","coordinates":[145.545548,-42.025459]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13355,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7942954","IGSN":"10273/AU7942954","SAMPLENO":7942954,"SAMPLE_ID":"Z633","AGE_MA":488.6,"AGE_MA_UNCERTAINTY":8.9,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":4,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"36Ar/40Ar and 39Ar/40Ar","MINERAL":"Hornblende","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"furnace: unknown model","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"University of Pavia, Italy","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Isochron (36Ar/40Ar vs 39Ar/40Ar)","AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":4953,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4953","STRAT_UNIT_NAME":"Crown Hill Andesite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate volcanic rock","LITHOLOGY":"andesite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Subvolcanic intrusion. Andesite; hornblende, clinopyroxene, albite and quartz phenocrysts in an altered quartzofeldspathic groundmass with chlorite, porphyritic to seriate texture. SSW flank of Crown Hill, via Lake Margaret Road.","SAMPLING_FEATURE_NAME":"R011495","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS861575","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Dundas Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-42.025459,"LONG_GDA94":145.545548,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"1:10 000 map","LOCATION_DESC":"SSW flank of Crown Hill, via Lake Margaret Road.","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Everard, J.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"42976","AGE_REF":"Everard, J.L., Villa, I.M., 1994. Argon geochronology of the Crown Hill Andesite, Mt Read Volcanics, Tasmania. Australian Journal of Earth Sciences, 41(3), 265-272.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099408728135","AGE_ENTRY_DATE":"2022-08-15","AGE_LAST_UPDATED":"2022-12-09"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13002","geometry":{"type":"Point","coordinates":[148.16548436,-41.40809116]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13002,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935603","IGSN":"10273/AU7935603","SAMPLENO":7935603,"SAMPLE_ID":"40578","AGE_MA":434,"AGE_MA_UNCERTAINTY":85,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":64.71,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: two-stage column separation","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"low-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"post-depositional age","AGE_REMARK_FROM_SOURCE":"Isochron age from multiple samples including AGENO 12993,12995,13002,13004. Contact metamorphosed within the arenite-lutite association","AGE_SOURCE":"MRT/Original Publication","PROJECT":null,"STRATNO":36812,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36812","STRAT_UNIT_NAME":"Mathinna Supergroup","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mathinna Beds - arenite-lutite sedimentary association","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"slate","MODE_OF_OCCURRENCE":"bed","SAMPLE_TYPE":"core","SAMPLE_DESC":"spotted slate","SAMPLING_FEATURE_NAME":"40578-79","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH865685","BOREHOLE_TOP_DEPTH_M":133,"BOREHOLE_BASE_DEPTH_M":133,"GEOLOGICAL_PROVINCE":"Northeast Tasmania Element","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.4080911559,"LONG_GDA94":148.165484361,"ELEV_M_AHD":235,"ACCURACY_M":50,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"37797; 1418","AGE_REF":"Cocker, J.D., 1982. Rb-Sr geochronology and Sr isotopic composition of Devonian granitoids, eastern Tasmania. Geological Society of Australia Journal, 29(2), 139-158.; Cocker, J.D., 1977, Petrogenesis of the Tasmanian granitoids. PhD thesis, University of Tasmania, Hobart.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/00167618208729201; Not Recorded","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13004","geometry":{"type":"Point","coordinates":[148.16548436,-41.40809116]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13004,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935604","IGSN":"10273/AU7935604","SAMPLENO":7935604,"SAMPLE_ID":"40579","AGE_MA":434,"AGE_MA_UNCERTAINTY":85,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":64.71,"NUMBER_OF_ANALYSES":4,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"Whole rock","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: two-stage column separation","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"low-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":"post-depositional age","AGE_REMARK_FROM_SOURCE":"Isochron age from multiple samples including AGENO 12993,12995,13002,13004. Contact metamorphosed within the arenite-lutite association","AGE_SOURCE":"MRT/Original Publication","PROJECT":null,"STRATNO":36812,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU36812","STRAT_UNIT_NAME":"Mathinna Supergroup","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mathinna Beds - arenite-lutite sedimentary association","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"hornfels","MODE_OF_OCCURRENCE":"bed","SAMPLE_TYPE":"core","SAMPLE_DESC":"spotted hornfels","SAMPLING_FEATURE_NAME":"40578-79","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH865685","BOREHOLE_TOP_DEPTH_M":133,"BOREHOLE_BASE_DEPTH_M":133,"GEOLOGICAL_PROVINCE":"Northeast Tasmania Element","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.4080911559,"LONG_GDA94":148.165484361,"ELEV_M_AHD":235,"ACCURACY_M":50,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"37797; 1418","AGE_REF":"Cocker, J.D., 1982. Rb-Sr geochronology and Sr isotopic composition of Devonian granitoids, eastern Tasmania. Geological Society of Australia Journal, 29(2), 139-158.; Cocker, J.D., 1977, Petrogenesis of the Tasmanian granitoids. PhD thesis, University of Tasmania, Hobart.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/00167618208729201; Not Recorded","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12574","geometry":{"type":"Point","coordinates":[147.3341667,-45.51777778]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12574,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935779","IGSN":"10273/AU7935779","SAMPLENO":7935779,"SAMPLE_ID":"147/DR50/A1","AGE_MA":748,"AGE_MA_UNCERTAINTY":108,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"U/Pb not reported","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"EPMA: wavelength dispersive spectrometer (WDS)","ANALYTICAL_COLLECTION_SYSTEM":"EPMA: unknown model","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"closure age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Rig Seismic AGSO Cruise 147. (Exon et al 1995. Record 1995/056).","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"The most common basement rock type is a gneissic rock with quartz, plagioclase, K-feldspar, biotite, muscovite and garnet. Chlorite is a common minor phase replacing biotite and garnet. A second generation of retrograde muscovite is also present. Sample DR50A2 [not DR50A1, which is seemingly undescribed] is relatively muscovite-poor, and most of its biotite is replaced by chlorite. It has An34 plagioclase and Ab22 orthoclase. The biotite is brown, TiO2-rich and relatively Mg-rich. The garnets have high pyrope components reflecting the overall Mg-rich composition of the rock. The garnet has a very narrow rim of lower Mg, with relatively flat Ca and Mn across most of the grain. Using the rim compositions, the rock cooled through 630C at 400 MPa; using matrix minerals and core garnet compositions, apparent conditions of 750C and 500 MPa are indicated. The flat Ca and Mn profile of the garnet is most consistent with a diffusive re-equilibration during metamorphism. However Spear (1991) argued that garnets of this grainsize cannot preserve Fe/Mg exchange temperatures of 750C at any realistic cooling rate. In this rock, modal garnet is greater than modal biotite and the calculated temperature probably reflects the shift of biotite composition to higher Fe by exchange reactions consuming garnet.","SAMPLING_FEATURE_NAME":"South Tasman Rise Geology","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-45.51777778,"LONG_GDA94":147.3341667,"ELEV_M_AHD":null,"ACCURACY_M":750,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.12576","geometry":{"type":"Point","coordinates":[145.623217,-43.775108]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":12576,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7935781","IGSN":"10273/AU7935781","SAMPLENO":7935781,"SAMPLE_ID":"SO36-29.3B","AGE_MA":356,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"isotopic resetting","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","ANALYTICAL_COLLECTION_SYSTEM":"K-Ar split analysis: K: AAS or AES and Ar: isotope-dilution mass spectrometry","LABORATORY_NAME":"BGR Hanover Germany","AGE_INTERPRETED_FROM_SOURCE":"metamorphism related to a large Devonian granite pluton","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"RV Sonne cruise 36B, 1985. Decay constant used: Steiger & Jager (1977)","AGE_SOURCE":"MRT","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Various rocks drilled off the South Tasman Rise and East Tasman Plateau","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"phyllite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"seabed sample","SAMPLE_DESC":"Sonne dredge samples from the continental slope off the west coast of Tasmania (SO36-28 and SO36-29) are chlorite zone phyllites with an intense crenulation cleavage overprinting an early schistosity. These have red weathering spots originally identified as garnet; however, in thin-section, these are seen to be strongly altered carbonate (?siderite) porphyroblasts. Similar deeply weathered rocks have been reported from the Port Davey area of western Tasmania (Spry & Baker 1965). The samples from SO36-28 and SO36-29 have ca 350 Ma K/Ar muscovite ages. Most of the measured Precambrian rocks have K/Ar ages older than this, but they show a strong Devonian resetting (Turner et al. 1995). Samples SO36-28 and SO36-29, from the continental margin off Port Davey, probably reflect metamorphism related to a large Devonian granite pluton (Leaman & Richardson 1992) which underlies much of southwestern Tasmania.","SAMPLING_FEATURE_NAME":"AGSO 58 SONNE 36B MSS","SAMPLING_FEATURE_TYPE":"SURVEY","SAMPLING_FEATURE_PID":null,"BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"South Tasman Rise","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-43.775108,"LONG_GDA94":145.623217,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23019","AGE_REF":"Berry, R.F., Meffre, S., Kreuzer, H., 1997. Metamorphic rocks from the southern margin of Tasmania and their tectonic significance. Australian Journal of Earth Sciences, 44(5), 609-619.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099708728340","AGE_ENTRY_DATE":"2022-03-23","AGE_LAST_UPDATED":"2022-11-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15196","geometry":{"type":"Point","coordinates":[136.4331321,-32.73940703]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15196,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034219","IGSN":"10.60494/qr1d-5k28","SAMPLENO":11034219,"SAMPLE_ID":"R1832109","AGE_MA":1718,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.94,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Titanite","MOUNT_ID":"CG11-09","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP-A","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"amphibolite, Mawson prospect","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"amphibolite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Reid & Jagodzinski 2012. Sample R1832109 is a metamorphosed mafic rock within drillhole 08MAW009. It comprises intergown plagioclase (35%), hornblende (30%), garnet (20%), clinopyroxene (15%) together with very minor quartz (<1%). Titanite is an accessory phase. Plagioclase occurs as medium grained equigranular crystals that is intergrown with the other phases in the rock. The plagioclase is extensively altered; it has reddish colouration in plain light indicative of a hematite-alteration and under cross polars shows high birefringence colours indicative of affine sericite alteration pervasive throughout the plagioclase. In places the plagioclase appears to have been completely replaced by sericite. Hornblende occurs as poikioblastic clots intergrown with the plagioclase and garnet and is dark green in colour. The hornblende is weakly altered to chlorite at the margins. Garnet is pale pink in colour and is isotropic, possible indicating an Fe-Mg-rich composition, possible almandine. These garnets are different in appearance to those dated in sample 1832111 (garnets in that sample display much brighter red pleochroism) and are interpreted to be metamorphic in origin as opposed to skarn alteration in origin as for sample 1832111. The clinopyroxene occurs intergrown with the previous minerals and appears to be part of the metamorphic texture. Titanite occurs as large single crystals, subhedral in morphology with a distinctive brown colouration and is intergrown with plagioclase, pyroxene and garnet. Titanite is interpreted to be part of the metamorphic assemblage. ","SAMPLING_FEATURE_NAME":"08MAW009","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH547742","BOREHOLE_TOP_DEPTH_M":263.1,"BOREHOLE_BASE_DEPTH_M":263.3,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-32.7394070293,"LONG_GDA94":136.4331320983,"ELEV_M_AHD":316,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2011-03-10","SAMPLE_ORIGINATOR":"Reid, A.J.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69047; 76126","AGE_REF":"Matonia, K., Freeman, R., 2008. Peterlumbo, Botenella Range, Lake Gilles [West], Eurilla Dam, Wilcherry Hill, Uno, Mount Miccollo and Tin Hut Hill (the Wilcherry Hill Project). Joint annual reports for the period 6/6/2002 to 31/10/2008. [Index Part 2 of 2]. Geological Survey of South Australia, ENV10493, 7401p.; Reid, A., Jagodzinski, E.A., Greene, D., Maas, R., Selby, D., Gregory, C., 2012. Project PGC02-04 and PGC02-05: Geochronology from the Mawson prospect, Weednana Skarn magnetite deposit and the Telephone Dam prospect, South Australia. IN Reid, A. and Jagodzinski, L. (eds) PACE Geochronology: Results of collaborative geochronology projects 2011-12. Geological Survey of South Australia. Report Book, 2012/00012, 101-135.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/d20010577; https://pid.sarig.sa.gov.au/document/mesac25179","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.13347","geometry":{"type":"Point","coordinates":[145.5848,-42.063692]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":13347,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU7942972","IGSN":"10273/AU7942972","SAMPLENO":7942972,"SAMPLE_ID":"92-133","AGE_MA":364.3,"AGE_MA_UNCERTAINTY":0.5,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":18,"CALCULATION_TYPE":"total gas","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"Muscovite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"furnace: unknown model","ANALYTICAL_COLLECTION_SYSTEM":"NG-MS: model unknown","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"granitoid emplacement and hydrothermal alteration","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original Publication","PROJECT":null,"STRATNO":13057,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13057","STRAT_UNIT_NAME":"Mount Read Volcanics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mount Lyell Cu deposits, gently-dipping fault at Prince Lyell","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"schist","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Muscovite schist from low angle fault at Prince Lyell, 200 drill point B3.","SAMPLING_FEATURE_NAME":"Prince Lyell","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS861591","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Dundas Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-42.063692,"LONG_GDA94":145.5848,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Perkins, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73586","AGE_REF":"Perkins, C., 1996. 40Ar/39Ar age constraints on deformation and mineralization, Rosebery Zn-Pb-Cu and Mount Lyell Cu deposits, Tasmania, Australia. 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A coarse grained muscovite schist, collected from the sheared host rock (H lens, 350 level).","SAMPLING_FEATURE_NAME":"Rosebery Base Metal Mine","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS861592","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Dundas Element","GEOLOGICAL_REGION_NAME":"Dundas Region","REGION_NAME_SOURCE":null,"STATE":"TAS","COUNTRY":"AUS","LAT_GDA94":-41.77226,"LONG_GDA94":145.543099,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Perkins, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73586","AGE_REF":"Perkins, C., 1996. 40Ar/39Ar age constraints on deformation and mineralization, Rosebery Zn-Pb-Cu and Mount Lyell Cu deposits, Tasmania, Australia. 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Most grains are multifaceted, many are sharply euhedral. Secondary electron images show the grains to be entirely surrounded by new zircon, either as a thin film that barely covers the roughness of the abraded surface, or as a thicker layer forming multiple small crystal faces. Cathodoluminescence images reveal that the thickness of the new layer ranges from a few micrometres where the pyramids of the crystals have begun to develop to a micrometre or so on the prism faces. In all cases, no matter how irregular the shape of the kernel of detrital zircon, the pyramids of the crystal have developed first and grown fastest. The new layer is uniformly weakly luminescent and unzoned.\"","SAMPLING_FEATURE_NAME":"95-34/35","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917391","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-36.24035,"LONG_GDA94":149.081336,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Williams, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23546","AGE_REF":"Williams, I.S., 2001. Response of detrital zircon and monazite, and their U-Pb isotopic systems, to regional metamorphism and host-rock partial melting, Cooma Complex, southeastern Australia. 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The primary gneissic fabric has undergone within-plane reworking resulting in recrystallisation of biotite, quartz and plagioclase.Late-stage muscovite (up to 1.5 mm) post-dates both structural fabrics.","SAMPLING_FEATURE_NAME":"Mount Furner 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH13868","BOREHOLE_TOP_DEPTH_M":551.99,"BOREHOLE_BASE_DEPTH_M":552.6,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.1025458,"LONG_GDA94":134.4653853,"ELEV_M_AHD":192,"ACCURACY_M":100,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64576","AGE_REF":"Payne, J.L., Hand, M., Barovich, K.M., Wade, B.P., 2008. 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The sampled interval is a partly weathered garnet-biotite-bearing quartzo-feldspathic gneiss. Garnet ranges between 0.5 and 2 mm, and contains inclusions of biotite and quartz. The gneissic fabric is defined by coarse biotite interspersed with quartz and sericitised plagioclase.","SAMPLING_FEATURE_NAME":"Manya 4","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH13185","BOREHOLE_TOP_DEPTH_M":801.9,"BOREHOLE_BASE_DEPTH_M":802.1,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.0366636,"LONG_GDA94":133.7863577,"ELEV_M_AHD":236,"ACCURACY_M":100,"LOCATION_METHOD":"company supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64576","AGE_REF":"Payne, J.L., Hand, M., Barovich, K.M., Wade, B.P., 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences, 55(5), 623-640.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090801982595","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14667","geometry":{"type":"Point","coordinates":[141.693742,-32.358824]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14667,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9677744","IGSN":"10.60494/xdsa-2k04","SAMPLENO":9677744,"SAMPLE_ID":"VP003","AGE_MA":426.6,"AGE_MA_UNCERTAINTY":2.3,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":2.1,"NUMBER_OF_ANALYSES":40,"CALCULATION_TYPE":"anchored discordia","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Thermo Scientific iCAP-RQ","LABORATORY_NAME":"James Cook University","AGE_INTERPRETED_FROM_SOURCE":"deformation or burial metamorphic events","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"All titanite samples in this analysis contained common lead, therefore the data was discordant and required common lead correction before plotting. Ages are Pb anchored model-1 discordia intercept ages.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"sampled from EHK3 @ 144-145 d","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate volcanic rock","LITHOLOGY":"andesite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Perry paraphrased: Fine to medium grained, light to dark grey with porphyritic texture and a coarse (3 cm) black, glassy enclave of more mafic material. Black, sub-rounded to angular shaped phenocrysts range in grainsize from 2 to 5 mm. White/cream coloured phenocrysts from 2 to 3 mm are also present and appear more tabular to blocky in shape. Fine grained, light grey groundmass with finer black grains (>1 mm), and finer material surrounding margin of the enclave. Thin section - Euhedral, lath-shaped plagioclase phenocrysts range in grainsize, mainly 1 to 3.5 mm, and are strongly altered and zoned. Clinopyroxene phenocrysts have been almost entirely replaced by brown hornblende (0.5 to 1.5 mm) and altered to chlorite and calcite. Fine-grained groundmass consisting of mostly plagioclase and opaques.","SAMPLING_FEATURE_NAME":"DD95EHK3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH866065","BOREHOLE_TOP_DEPTH_M":144,"BOREHOLE_BASE_DEPTH_M":145,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.358824,"LONG_GDA94":141.693742,"ELEV_M_AHD":115,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75278","AGE_REF":"Perry, V.E., 2021, Geochemistry of the Loch Lilly-Kars volcanics and correlation along the Tasman Line, Eastern Australia. [Honours thesis, unpublished]. University of Newcastle, NSW.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2024-05-29","AGE_LAST_UPDATED":"2024-05-29"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15179","geometry":{"type":"Point","coordinates":[133.88375382,-28.86038466]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15179,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9658306","IGSN":"10.60494/464f-zs84","SAMPLENO":9658306,"SAMPLE_ID":"650723","AGE_MA":1555,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.4,"NUMBER_OF_ANALYSES":11,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"monazite growth during high-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Bimodal age distribution. This age is interpreted as a younger age event. Age is interpreted to be high-T reworking during the 1570-1555 Ma Kararan Orogeny.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":78896,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU78896","STRAT_UNIT_NAME":"Hutchison Supergroup","INFORMAL_UNIT_NAME":"unnamed (para?) gneiss, Mabel Creek Ridge, Nawa Domian, Gawler Craton","UNIT_NAME_SOURCE":"AM/PB 3: Mabel Creek Ridge area of Nawa Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"(Gneiss (interpreted sedimentary protolith)) Payne et al 2008  (AJES): This sample is a quartz-plagioclase-garnet-biotite gneiss. The sampled interval targeted comparatively magnetite-poor rocks and contained evidence for two metamorphic assemblages. The primary mineral assemblage is characterised by interlayered, steeply dipping coarse-grained garnet-biotite-plagioclase-quartz and garnet-hornblende-biotite-plagioclase-quartz assemblages. In both bulk compositions, garnet has been partially replaced by orthopyroxene and plagioclase. The primary assemblage and garnet replacement textures have been overprinted by narrow shear zones that formed at a high angle to the primary fabric. The shear fabric assemblage is dominated by biotite which encloses recrystallised plagioclase and quartz. The AM/PB 3 drillhole intersects basement at a depth of 187.25 m and has a total depth of 287 m.","SAMPLING_FEATURE_NAME":"PB 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444034","BOREHOLE_TOP_DEPTH_M":272.4,"BOREHOLE_BASE_DEPTH_M":272.9,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8603846562,"LONG_GDA94":133.883753824,"ELEV_M_AHD":204,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64576","AGE_REF":"Payne, J.L., Hand, M., Barovich, K.M., Wade, B.P., 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences, 55(5), 623-640.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090801982595","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14461","geometry":{"type":"Point","coordinates":[149.081336,-36.24035]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14461,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655751","IGSN":"10.60494/94b9-0380","SAMPLENO":9655751,"SAMPLE_ID":"95-35","AGE_MA":435,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphic monazite growth","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This age is indistinguishable from the Pb/U age of zircon from the same rock (431.7 +/- 10.9 Ma) that suggests that monazite and zircon crystallised at the same time. The convergence of apparent monazite ages in this study reflects resetting of pre-existing monazite U-Th-Pb isotopic systems and the growth of new monazite during partial melting and magmatism.","AGE_SOURCE":"MinView/Original publication(s)","PROJECT":null,"STRATNO":4572,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4572","STRAT_UNIT_NAME":"Cooma Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cooma Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Williams 2001 paraphrased: \"Leucosome migmatite. The migmatite consists of disrupted, but in places broadly continuous, bands of metapsammite in a matrix of coarser grained metapelite containing widespread evidence (veins and localised coarse-grained quartzo-feldspathic segregations) of smallscale partial melting. The leucosome sample was taken from a vein ~0.1 m thick (as distinct from a localised partial melt patch) and consisting mainly of coarse (>5 mm) quartz, cordierite and feldspar. Cordierite, in contrast to that in the melanosome, is not poikilitic and, with the exception of scattered sillimanite needles, is relatively inclusion free. Ragged andalusite grains are up to 2 mm diameter. Rare biotite flakes up to 1 mm are associated with masses of fibrolitic sillimanite and contain abundant pleochroic haloes around radioactive inclusions. New zircon growth is ubiquitous in the migmatite samples. Much less zircon was recovered from the leucosome. As in the melanosome the crystals are fine-grained (40-100 um), but they are consistently more prismatic, with aspect ratios ranging from 2 to 5, commonly with large {211} crystal faces. Cathodoluminescence imaging shows that, in contrast to the melanosome zircon, the crystals are dominated by new growth. Pyramidal overgrowths commonly 50 um, and in some cases up to 100 um, thick surround zircon cores that are smaller on average than those in the melanosome. It is not unusual for the overgrowth to exceed 70% of the volume of the grain. Even so, the overgrowths on the prism faces can be very thin, and in some cases barely cover the irregular surface of the core. The overgrowths are consistently weakly luminescent, and any zoning present is indistinct, broad and simply euhedral. Like the accompanying monazite, the new zircon is rich in acicular inclusions that are probably sillimanite.\"","SAMPLING_FEATURE_NAME":"95-34/35","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917391","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-36.24035,"LONG_GDA94":149.081336,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Williams, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23546","AGE_REF":"Williams, I.S., 2001. Response of detrital zircon and monazite, and their U-Pb isotopic systems, to regional metamorphism and host-rock partial melting, Cooma Complex, southeastern Australia. Australian Journal of Earth Sciences, 48(4), 557-580.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2001.00883.x","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14410","geometry":{"type":"Point","coordinates":[149.057752,-36.243998]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14410,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655752","IGSN":"10.60494/4e7g-6378","SAMPLENO":9655752,"SAMPLE_ID":"95-64","AGE_MA":433.7,"AGE_MA_UNCERTAINTY":9.9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The convergence of apparent monazite ages in this study reflects resetting of pre-existing monazite U-Th-Pb isotopic systems and the growth of new monazite during partial melting and magmatism.","AGE_SOURCE":"MinView/Original publication(s)","PROJECT":null,"STRATNO":4572,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4572","STRAT_UNIT_NAME":"Cooma Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cooma Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"K-feldspar metapelite gneiss. Williams 2001 paraphrased \"Cordierite–andalusite–K-feldspar zone metasediment samples were collected from a deeply weathered road cut a few hundred metres inside the sillimanite isograd of Chappell and White (1976), namely at a slightly higher grade than the K-feldspar isograd, but well outside the sillimanite isograd of later workers (Johnson 1992). Pelitic and psammitic layers are clearly recognisable on an outcrop scale, but are disrupted and sinuous. Samples were taken 0.1 m apart from adjacent metapelitic (95-64) and metapsammitic (95-65) layers. The metapsammite is the finer grained, consisting mainly of quartz, biotite and minor muscovite. Rare fibrolitic sillimanite is associated with biotite, but there is no andalusite. The coarser grained metapelite is much more aluminous, consisting of quartz, biotite, muscovite, coarse poikilitic andalusite and minor K-feldspar, plagioclase and fibrolitic sillimanite. Biotite is mostly coarse grained (<\/= 600 um) and, in contrast to biotite in the lower grade samples, is crowded with pleochroic haloes, indicating the presence of radioactive inclusions, such as monazite and zircon. Biotite in the adjacent metapsammite contains similar haloes, but far fewer of them. Small yield and fine grainsize (<100 um) are features of the metapelite monazite. The grains are nearly colourless, high clarity, subhedral to euhedral crystals, most with well-developed crystal faces. The few tiny inclusions present are either transparent crystals or possibly trapped fluid. The grains still contain patches of complex zoning, but are dominated by relatively homogeneous monazite that coats the grains, forming their crystal faces. At this metamorphic grade, host-rock composition, and presumably fluid content and composition, has determined whether monazite continues to dissolve or begins to reprecipitate.\"","SAMPLING_FEATURE_NAME":"95-64/65","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917392","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-36.243998,"LONG_GDA94":149.057752,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Williams, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23546","AGE_REF":"Williams, I.S., 2001. Response of detrital zircon and monazite, and their U-Pb isotopic systems, to regional metamorphism and host-rock partial melting, Cooma Complex, southeastern Australia. Australian Journal of Earth Sciences, 48(4), 557-580.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2001.00883.x","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15269","geometry":{"type":"Point","coordinates":[133.88375382,-28.86038466]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15269,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9658306","IGSN":"10.60494/464f-zs84","SAMPLENO":9658306,"SAMPLE_ID":"650723","AGE_MA":1701,"AGE_MA_UNCERTAINTY":9.2,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.76,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"monazite growth during high-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Bimodal age distribution. This age is interpreted as the older age event of the craton-wide Kimban Orogeny in the interval 1730-1690 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":78896,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU78896","STRAT_UNIT_NAME":"Hutchison Supergroup","INFORMAL_UNIT_NAME":"unnamed (para?) gneiss, Mabel Creek Ridge, Nawa Domian, Gawler Craton","UNIT_NAME_SOURCE":"AM/PB 3: Mabel Creek Ridge area of Nawa Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"(Gneiss (interpreted sedimentary protolith)) Payne et al 2008  (AJES): This sample is a quartz-plagioclase-garnet-biotite gneiss. The sampled interval targeted comparatively magnetite-poor rocks and contained evidence for two metamorphic assemblages. The primary mineral assemblage is characterised by interlayered, steeply dipping coarse-grained garnet-biotite-plagioclase-quartz and garnet-hornblende-biotite-plagioclase-quartz assemblages. In both bulk compositions, garnet has been partially replaced by orthopyroxene and plagioclase. The primary assemblage and garnet replacement textures have been overprinted by narrow shear zones that formed at a high angle to the primary fabric. The shear fabric assemblage is dominated by biotite which encloses recrystallised plagioclase and quartz. The AM/PB 3 drillhole intersects basement at a depth of 187.25 m and has a total depth of 287 m.","SAMPLING_FEATURE_NAME":"PB 3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH444034","BOREHOLE_TOP_DEPTH_M":272.4,"BOREHOLE_BASE_DEPTH_M":272.9,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8603846562,"LONG_GDA94":133.883753824,"ELEV_M_AHD":204,"ACCURACY_M":20,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64576","AGE_REF":"Payne, J.L., Hand, M., Barovich, K.M., Wade, B.P., 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences, 55(5), 623-640.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090801982595","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14668","geometry":{"type":"Point","coordinates":[141.693742,-32.358824]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14668,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9677745","IGSN":"10.60494/h3gd-5m13","SAMPLENO":9677745,"SAMPLE_ID":"VP004","AGE_MA":422.7,"AGE_MA_UNCERTAINTY":2.4,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":0.82,"NUMBER_OF_ANALYSES":40,"CALCULATION_TYPE":"anchored discordia","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Thermo Scientific iCAP-RQ","LABORATORY_NAME":"James Cook University","AGE_INTERPRETED_FROM_SOURCE":"deformation or burial metamorphic events","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"All titanite samples in this analysis contained common lead, therefore the data was discordant and required common lead correction before plotting. Ages are Pb anchored model-1 discordia intercept ages.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"sampled from EHK3 @ 150-152 d","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic intrusive rock","LITHOLOGY":"gabbro","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Perry paraphrased: This rock is dark grey to black and mostly fine-grained. Slightly coarser black grains (1 to 2 mm) stand out from the finer-grained groundmass. Sulfide veining and pyrite common. Larger veins (3 mm width) appear green in colour, whereas thin veins (<1mm width) are more cream to white. Thin section - Primary mafic phases include clinopyroxene, plagioclase and opaques. Clinopyroxene phenocrysts range in grainsize from 0.5 to 1.5 mm and are overgrown by secondary amphibole along the edges of grains. Some clinopyroxene grains show strong core to rim zoning. Plagioclase is strongly altered and secondary, mix-layered clays are present within plagioclase grains, a common feature in low grade metamorphic rocks. The turquoise-blue secondary amphibole is also common with secondary biotite aggregates. The presence of secondary amphiboles and fine-grained secondary biotite indicates this fine-grained gabbro has experienced lower amphibolite facies.","SAMPLING_FEATURE_NAME":"DD95EHK3","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH866065","BOREHOLE_TOP_DEPTH_M":150,"BOREHOLE_BASE_DEPTH_M":152,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.358824,"LONG_GDA94":141.693742,"ELEV_M_AHD":115,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75278","AGE_REF":"Perry, V.E., 2021, Geochemistry of the Loch Lilly-Kars volcanics and correlation along the Tasman Line, Eastern Australia. [Honours thesis, unpublished]. University of Newcastle, NSW.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2024-05-29","AGE_LAST_UPDATED":"2024-05-29"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14839","geometry":{"type":"Point","coordinates":[139.31916353,-30.21991407]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14839,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655238","IGSN":"10.60494/79k3-te17","SAMPLENO":9655238,"SAMPLE_ID":"ARK732","AGE_MA":355,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":8,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave LUV213 laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Nu Plasma HR","LABORATORY_NAME":"University of Oslo","AGE_INTERPRETED_FROM_SOURCE":"Not explicitly interpreted; assumed to reflect hydrothermal alteration associated with mineralisation.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Age calculated from 8/8 analyses obtained. MSWD not specified.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":75704,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU75704","STRAT_UNIT_NAME":"Radium Creek Group","INFORMAL_UNIT_NAME":"Radium Creek Metamorphics","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"mineralisation","LITHOLOGY":"mineralisation","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2012, 2013): Ore consisting largely of iron oxide, with hematite and Mn (hydr)oxides overgrowing and/or replacing magnetite. Monazite is an important minor phase. Barite veins crosscut some ores, and fluorite and quartz appear to be late phases too. Apart from iron and manganese, the ores are also enriched in Cu and U, and sometimes in Mo and As as well. ARK732 contains more than 2000 ppm U, but has low Th (9 ppm), and very high concentrations of REE and strong LREE enrichment (Ce = 2500 ppm), Ba (19,000 ppm) and Cu (1400 ppm). U concentrations are typically detectable by EDS, but are significantly lower than for the granitoid-derived monazites. Monazite crystals from the different samples fall in distinct groups, and the most notable feature of these analyses is the paradoxically low U content of the monazites within the U-ore.","SAMPLING_FEATURE_NAME":"ARK732","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS912533","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Curnamona Province","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.2199140707,"LONG_GDA94":139.319163525,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75089","AGE_REF":"Elburg, M.A., Andersen, T., Bons, P.D., Simonsen, S.L., Weisheit, A., 2013. New constraints on Phanerozoic magmatic and hydrothermal events in the Mt Painter Province, South Australia. Gondwana Research, 24(2), 700-712.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.gr.2012.12.017","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14303","geometry":{"type":"Point","coordinates":[149.057752,-36.243998]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14303,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655753","IGSN":"10.60494/3f0s-da47","SAMPLENO":9655753,"SAMPLE_ID":"95-65","AGE_MA":428.1,"AGE_MA_UNCERTAINTY":9.3,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The convergence of apparent monazite ages in this study reflects resetting of pre-existing monazite U-Th-Pb isotopic systems and the growth of new monazite during partial melting and magmatism. The large analytical uncertainties in the analyses is due to a large common Pb content.","AGE_SOURCE":"MinView/Original publication(s)","PROJECT":null,"STRATNO":4572,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4572","STRAT_UNIT_NAME":"Cooma Metamorphic Complex","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cooma Complex","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"K-feldspar metapsammite gneiss. Williams 2001 paraphrased \"Cordierite–andalusite–K-feldspar zone metasediment samples were collected from a deeply weathered road cut a few hundred metres inside the sillimanite isograd of Chappell and White (1976), namely at a slightly higher grade than the K-feldspar isograd, but well outside the sillimanite isograd of later workers (Johnson 1992). Pelitic and psammitic layers are clearly recognisable on an outcrop scale, but are disrupted and sinuous. Samples were taken 0.1 m apart from adjacent metapelitic (95-64) and metapsammitic (95-65) layers. The metapsammite is the finer grained, consisting mainly of quartz, biotite and minor muscovite. Rare fibrolitic sillimanite is associated with biotite, but there is no andalusite. The coarser grained metapelite is much more aluminous, consisting of quartz, biotite, muscovite, coarse poikilitic andalusite and minor K-feldspar, plagioclase and fibrolitic sillimanite. Biotite is mostly coarse grained (<\/= 600 um) and, in contrast to biotite in the lower grade samples, is crowded with pleochroic haloes, indicating the presence of radioactive inclusions, such as monazite and zircon. Biotite in the adjacent metapsammite contains similar haloes, but far fewer of them. Monazite recovery from the metapsammite was extremely small, both in size and number of grains (30 grains <50 um diameter). Delicate and irregularly shaped, embayed and with highly polished surfaces, these appear to be the last remnants of grains mostly destroyed by dissolution. Some original monazite remains, however, remnants of zoning structure still being visible in the backscattered electron images despite the dominance of thick homogeneous mantles.\"","SAMPLING_FEATURE_NAME":"95-64/65","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917392","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-36.243998,"LONG_GDA94":149.057752,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Williams, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23546","AGE_REF":"Williams, I.S., 2001. Response of detrital zircon and monazite, and their U-Pb isotopic systems, to regional metamorphism and host-rock partial melting, Cooma Complex, southeastern Australia. Australian Journal of Earth Sciences, 48(4), 557-580.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2001.00883.x","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14862","geometry":{"type":"Point","coordinates":[139.13434072,-34.81555721]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14862,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655262","IGSN":"10.60494/k6p5-gj56","SAMPLENO":9655262,"SAMPLE_ID":"Rathjen Gneiss","AGE_MA":503.3,"AGE_MA_UNCERTAINTY":7.4,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":15851,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU15851","STRAT_UNIT_NAME":"Rathjen Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Rathjen Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Foden et al. (1999): The Rathjen Gneiss is a coarse- to medium-grained orthogneiss of granitic to granodioritic composition with I-type mineralogy and chemistry. It is composed of quartz, partly zoned plagioclase (An25-45) and mildly perthitic microcline. The main ferromagnesian mineral is biotite, but hornblende is also common. Minor or accessory phases include apatite, zircon, titanite, magnetite and rare allanite. In outcrop it forms a sheet-like structure in the core of a regional NNW-trending anticline, exposed in elevated country to the south of Springton. The main body of the Rathjen Gneiss forms a narrow canoe-shaped body, up to 3 km wide and 12 km long, between Springton and the Tungkillo-Palmer road.","SAMPLING_FEATURE_NAME":"Rathjen Gneiss","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS912557","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.8155572139,"LONG_GDA94":139.1343407234,"ELEV_M_AHD":null,"ACCURACY_M":1000,"LOCATION_METHOD":"1:250 000 map","LOCATION_DESC":"Foden et al. (1999): [Australian National Grid Zone 6,] 214550 yE, 698550 yN. Converted (approximately) using the 1969 first edition Adelaide 1:250 00 geology map to [presumed AGD66] 139 deg 8 min E, 34 deg 49 min S.","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Foden, J.D.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23317","AGE_REF":"Foden, J., Sandiford, M., Dougherty-Page, J., Williams, I., 1999. Geochemistry and geochronology of the Rathjen Gneiss: implications for the early tectonic evolution of the Delamerian Orogen. Australian Journal of Earth Sciences, 46(3), 377-389.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.1999.00712.x","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14145","geometry":{"type":"Point","coordinates":[149.130717,-36.230175]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14145,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655748","IGSN":"10.60494/dysz-5p74","SAMPLENO":9655748,"SAMPLE_ID":"76-3A","AGE_MA":432.8,"AGE_MA_UNCERTAINTY":4.7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":null,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic monazite age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This age is indistinguishable from the Pb/U age of the zircon in this same granodiorite sample (435.2 +/- 6.3 Ma) and the surrounding high-grade metamorphic rocks. The convergence of apparent monazite ages in this study reflects resetting of pre-existing monazite U-Th-Pb isotopic systems and the growth of new monazite during partial melting and magmatism.","AGE_SOURCE":"MinView/Original publication(s)","PROJECT":null,"STRATNO":4571,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU4571","STRAT_UNIT_NAME":"Cooma Granodiorite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Cooma Granodiorite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granodiorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Williams 2001 paraphrased: \"Sample 76-3A was collected from a large fresh boulder excavated from a deep road cut on the flank of Nanny Goat Hill in Cooma township. The granodiorite is medium grained & massive & contains a high abundance of enclaves on all scales from small clots of minerals to rock fragments up to 0.5 m diameter. The enclaves all of sedimentary derivation can be matched closely with many of the highest grade rocks in the regional aureole including metapsammite biotite schist & b&ed gneiss. The granodiorite is exceedingly quartz rich (~50%) & unequilibrated mineralogically. Aluminous phases include biotite muscovite ragged sieved & alusite up to 2 mm cordierite phenocrysts up to 15 mm (most now pinitised) & mats of fibrolitic sillimanite. K-feldspar crystals up to 4 mm commonly have myrmekite developed at their margins & plagioclase more abundant than in the migmatites commonly occurs as zoned tabular grains with calcic cores. Biotite is crowded with pleochroic haloes around inclusions of zircon & monazite. Zircon is very abundant in the Cooma Granodiorite mostly sharply euhedral & with a very similar grainsize range to zircon in the low-grade semipelites (30-250 um). It is however a complex population. Although euhedral grains dominate a few crystals are strongly rounded & the frosted surface characteristic of detrital zircon is clearly visible under an optical microscope. Aspect ratios range from 1 to ~5. Terminations with strongly developed faces predominate particularly on the larger & more equant crystals but very simple prismatic crystals with only prisms & pyramids are common among the finer grains. Cathodoluminescence images reveal the reason for this variety. Virtually all zircons contain a core & it was principally the size & shape of that core that determined the size & shape of the final crystal. At one end of the spectrum are crystals in which the core is very large (>100 um) & strongly rounded.","SAMPLING_FEATURE_NAME":"76-3A","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917363","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Lachlan Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-36.230175,"LONG_GDA94":149.130717,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Williams, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"23546","AGE_REF":"Williams, I.S., 2001. Response of detrital zircon and monazite, and their U-Pb isotopic systems, to regional metamorphism and host-rock partial melting, Cooma Complex, southeastern Australia. Australian Journal of Earth Sciences, 48(4), 557-580.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2001.00883.x","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1586","geometry":{"type":"Point","coordinates":[135.251,-23.21328]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1586,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2168680","IGSN":"10273/AU2168680","SAMPLENO":2168680,"SAMPLE_ID":"IC08JAW537","AGE_MA":1723,"AGE_MA_UNCERTAINTY":20,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.3,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z5436","ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: unknown model","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: unknown model","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"High-U, dark CL rims give a metamorphic age of 1723 +/- 20 Ma, providing evidence for metamorphism during the early 1730-1690 Ma Strangways Event.","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed granite","UNIT_NAME_SOURCE":"Lionel Suite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"granite","SAMPLING_FEATURE_NAME":"IC08JAW537","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS574628","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-23.21328,"LONG_GDA94":135.251,"ELEV_M_AHD":632,"ACCURACY_M":200,"LOCATION_METHOD":"other method","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Champion, D.C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"69917","AGE_REF":"Beyer, E.E., Hollis, J.A., Whelan, J.A., Glass, L.M., Donnellan, N., Yaxley, G., Armstrong, R., Allen, C.M., Schersten, A., 2013. Summary of results. NTGS laser ablation ICPMS and SHRIMP U-Pb, Hf and O geochronology project: Pine Creek Orogen, Arunta Region, Georgina Basin and McArthur Basin; July 2008-May 2011. Northern Territory Geological Survey Record, 2012-007, 205p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82460","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2023-10-13"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14782","geometry":{"type":"Point","coordinates":[139.33179514,-30.25152933]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14782,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655830","IGSN":"10.60494/zc22-ce16","SAMPLENO":9655830,"SAMPLE_ID":"ME01GT2","AGE_MA":474.6,"AGE_MA_UNCERTAINTY":2,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: ion exchange chromatography","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Deformation associated with shear-band development in basement shear zone.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Single bulk analysis of monazite. MSWD of concordance = 2.5, probability of fit (concordance) = 0.12. As this was a bulk monazite separate, there is a chance that the age represents a mixing age between primary and secondary monazite. However, virtually all monazite is associated with the biotite that defines the shear bands, suggesting that the monazite formed by new growth. If it were a mixed age, the age of the new growth would be even younger than 475 Ma because the monazite associated with the intrusion would have had an age of the order of 1570 Ma (Elburg et al. 2001).","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":27205,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27205","STRAT_UNIT_NAME":"Mount Gee Sinter","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mt Gee Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"fault or shear rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2003): ME01GT2 was sampled from a late shear zone in basement granite around Sunshine Pound. The sample is extraordinarily rich in monazite that appears to be a secondary mineral, perhaps related to the development of the shear zone. Other mineral constituents of this sample are plagioclase, quartz, K-feldspar, biotite, rutile and minor muscovite. The phyllosilicates define the shear fabric within this sample, and both rutile and monazite are associated with the biotite.","SAMPLING_FEATURE_NAME":"ME01GT2","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917613","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Painter Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.2515293297,"LONG_GDA94":139.3317951394,"ELEV_M_AHD":null,"ACCURACY_M":200,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24593","AGE_REF":"Elburg, M.A., Bons, P.D., Foden, J., Brugger, J., 2003. A newly defined Late Ordovician magmatic-thermal event in the Mt Painter Province, northern Flinders Ranges, South Australia. Australian Journal of Earth Sciences, 50(4), 611-631.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2003.01016.x","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14780","geometry":{"type":"Point","coordinates":[139.34162354,-30.24736853]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14780,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655831","IGSN":"10.60494/zj1d-k255","SAMPLENO":9655831,"SAMPLE_ID":"ME00DI2","AGE_MA":442.3,"AGE_MA_UNCERTAINTY":3.7,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/235U and 206Pb/238U","MINERAL":"Titanite; Diopside","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: ion exchange chromatography","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Crystallisation of vein-hosted euhedral titanite and diopside during hydrothermal alteration of the host Mesoproterozoic A-type granite.","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Two-point (titanite-diopside) isochron, with initial 206Pb/204Pb = 18.56. Misspelt as ME99DI2 in some tables and figures.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"vein","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2003): Veins with large (up to 60 cm long), often euhedral, crystals of diopside, with or without titanite (euhedral, up to 20 cm diameter), are found in a creek section in one of the Mesoproterozoic A-type granites in the basement. The veins are up to 1.5 m wide and some can be followed along strike from the bottom of the creek to the top of the western ridge (170 m), where they are cut off by a fault. The crystals appear to have grown into open space. There is no evidence that any of the veins have been folded. Most of the original diopside has been retrogressed to actinolite. Later minerals in the veins are calcite, quartz and hematite. The latter two minerals often overgrow the diopside and titanite. Sample ME00DI2 consists of loose crystals of diopside, titanite and calcite that were pried out of a smaller (3 cm thick) vein.","SAMPLING_FEATURE_NAME":"ME00DI2","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS574777","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Painter Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.2473685331,"LONG_GDA94":139.3416235421,"ELEV_M_AHD":null,"ACCURACY_M":200,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24593","AGE_REF":"Elburg, M.A., Bons, P.D., Foden, J., Brugger, J., 2003. 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MSWD of concordance = 1.4, probability of fit (concordance) = 0.14. This monazite fraction was characterised by rather low U contents (217 ppm), and low radiogenic lead contents. In these respects, this monazite fraction is similar to the monazites analysed by Pidgeon(1979) from the hematitic breccia of the Mt Gee area, for which an age of 440 +/- 50 Ma was derived by extrapolation to zero discordance. Our determinations fall within the same range and, unfortunately, are no more precise. Contrary to the findings of  Pidgeon (1979), the monazite fraction we analysed was not characterised by a low initial Th/U ratio,but is similar to the values for the monazites from the British Empire Granite.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":27205,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27205","STRAT_UNIT_NAME":"Mount Gee Sinter","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mt Gee Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasomatic rock","LITHOLOGY":"sinter","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2003): The area from which our quartz–hematite sample ME01GE1 was derived is not from the Mt Gee area itself, but from a location 4.5 km to the south of Mt Gee. Material at this smaller outcrop has mineralogy and textures like rocks at the classical Mt Gee locality (Drexel & Major 1990).","SAMPLING_FEATURE_NAME":"ME01GE1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917614","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Painter Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.2617608919,"LONG_GDA94":139.3403319335,"ELEV_M_AHD":null,"ACCURACY_M":200,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24593","AGE_REF":"Elburg, M.A., Bons, P.D., Foden, J., Brugger, J., 2003. A newly defined Late Ordovician magmatic-thermal event in the Mt Painter Province, northern Flinders Ranges, South Australia. 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The sample  was collected from an outcrop of thin- to medium-bedded, fine-grained laminated metasandstone interbedded with fine-grained scapolitic calc-silicate rocks that occur along a low ridge in the westernmost part of the Corella Formation type section about 150 m above the base and the contact with the underlying Ballara Quartzite. The site is about 50 m north of the former Cloncurry–Mount Isa road (now used as a station track on Corella Park Station) and is about 17.5 km north of the former Mary Kathleen uranium mine. In thin section, the sample consists of ~25% bluish green, subelongate and partly aligned grains of hornblende up to 0.5 mm in a granular mosaic of quartz and untwinned feldspar in subequal proportions and generally 0.05–0.1 mm. Opaque grains (~5%) and accessory titanite are also present. Bands of alteration up to 5 mm wide contain turbid feldspar and minor epidote. The sample was collected to provide a MDA and Zr spectra to be used as a control for regional comparison.","SAMPLING_FEATURE_NAME":"ASMI0089","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS625714","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-20.5897304321,"LONG_GDA94":140.0332479759,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Lewis, C.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75056","AGE_REF":"Kositcin, N., Lewis, C.J., Withnall, I.W., Slade, A.P., Sargent, S., Hutton, L.J., 2023. Summary of results. Joint GSQ-GA Geochronology Project: Mount Isa region, 2017-2018. Geoscience Australia. Record, 2023/32, 97p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/147793","AGE_ENTRY_DATE":"2023-07-24","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15497","geometry":{"type":"Point","coordinates":[136.41072984,-34.03069655]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15497,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083873","IGSN":"10.60494/pt5s-v374","SAMPLENO":11083873,"SAMPLE_ID":"IGC29","AGE_MA":1709,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.23,"NUMBER_OF_ANALYSES":39,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"IGC29","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS1008579","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.0306965455,"LONG_GDA94":136.4107298354,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Bratten Cairn","SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74358","AGE_REF":"Courtney-Davies, L., Ciobanu, C.L., Tapster, S.R., Cook, N.J., Ehrig, K., Crowley, J.L., Verdugo-Ihl, M.R.,, Wade, B.P., Condon, D.J., 2020. Opening the magmatic-hydrothermal window: High-precision U-Pb geochronology of the Mesoproterozoic Olympic Dam Cu-U-Au-Ag deposit, South Australia. Economic Geology, 115(8), 1855-1870.","AGE_PUBLICATION_LINKS":"https://doi.org/10.5382/econgeo.4772","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15426","geometry":{"type":"Point","coordinates":[135.487199,-29.616791]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15426,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1585039","IGSN":"10273/AU1585039","SAMPLENO":1585039,"SAMPLE_ID":"2003362541","AGE_MA":1590.7,"AGE_MA_UNCERTAINTY":3.3,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":1.3,"NUMBER_OF_ANALYSES":35,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":"Gawler Project","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"102.7-106.0m","SAMPLING_FEATURE_NAME":"Mount Woods 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH620966","BOREHOLE_TOP_DEPTH_M":102.7,"BOREHOLE_BASE_DEPTH_M":106,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.616791,"LONG_GDA94":135.487199,"ELEV_M_AHD":198,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Holm, O.H.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74362","AGE_REF":"Holm, O., 2004. New geochronology of the Mount Woods Inlier and Central Gawler Gold Province [accompanying slides]. IN: Gawler Craton 2004: State of Play, Adelaide, 4-6 August 2004. Geological Survey of South Australia. Report Book, 2004/00018, 3.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2019d081296","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14649","geometry":{"type":"Point","coordinates":[141.68801042,-32.35143145]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14649,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9677761","IGSN":"10.60494/kv27-0p89","SAMPLENO":9677761,"SAMPLE_ID":"VP006/007","AGE_MA":417,"AGE_MA_UNCERTAINTY":3.6,"AGE_CONFIDENCE_LEVEL":"not reported","AGE_MSWD":0.71,"NUMBER_OF_ANALYSES":28,"CALCULATION_TYPE":"anchored discordia","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Titanite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Thermo Scientific iCAP-RQ","LABORATORY_NAME":"James Cook University","AGE_INTERPRETED_FROM_SOURCE":"deformation or burial metamorphic events","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"All titanite samples in this analysis contained common lead, therefore the data was discordant and required common lead correction before plotting. Ages are Pb anchored model-1 discordia intercept ages.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"sampled from NBH004 @ 159-170 d","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"basic volcanic rock","LITHOLOGY":"basalt","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Perry paraphrased: sample VP006 - This rock is a dark grey to black, generally fine-grained basalt however some intervals appear to be more medium-grained. Sulfide veining and alteration observed throughout. Thin section - Fine-grained basalt with interlocking plagioclase laths and clinopyroxene grains (commonly <0.5 mm) that have experienced quartz-biotite-actinolite alteration. Opaques are present throughout, as well as secondary turquoise-blue amphibole and secondary brown biotite. Sample VP007 - Dark grey to black,fine-grained basalt with some intervals appearing more medium-grained and lighter in colour due to greater alteration. Overall, this sample appears strongly altered, disseminated opaques with white halos. Thin section - Similar mineralogy and texture to VP006, however, more strongly altered. Unidentified orange to red, slightly pleochroic alteration product throughout and occurs with secondary blue-green amphibole. Opaques surrounded by this alteration assemblage.","SAMPLING_FEATURE_NAME":"NBH004","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH817055","BOREHOLE_TOP_DEPTH_M":159,"BOREHOLE_BASE_DEPTH_M":170,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-32.3514314471,"LONG_GDA94":141.6880104248,"ELEV_M_AHD":119,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75278","AGE_REF":"Perry, V.E., 2021, Geochemistry of the Loch Lilly-Kars volcanics and correlation along the Tasman Line, Eastern Australia. [Honours thesis, unpublished]. University of Newcastle, NSW.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2024-05-29","AGE_LAST_UPDATED":"2024-05-29"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15038","geometry":{"type":"Point","coordinates":[143.92462298,-17.02490142]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15038,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9402790","IGSN":"10.60494/wctw-2y31","SAMPLENO":9402790,"SAMPLE_ID":"BB6023B","AGE_MA":1578,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.17,"NUMBER_OF_ANALYSES":17,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6506","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":27758,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27758","STRAT_UNIT_NAME":"Dargalong Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Dargalong Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Crystalline basement intersected in drillhole Karumba KAN_0002_1 is represented by dark grey, strongly deformed, fine- to medium-grained garnet–biotite gneiss that has been assigned to the Dargalong Metamorphics (referred to as ‘Dargalong Metamorphic Group’ in some reports — e.g., Withnall et al., 1997, various pages) on the solid geology coverage, based on a similar magnetic response to outcrops of the same unit ca 9 km to the southeast.\r\nThe gneiss consists mainly of quartz, plagioclase, and biotite. Original quartz grains have recrystallised to aggregates of small (ca 0.4 mm), anhedral grains with highly undulose extinction. Plagioclase is the dominant, possibly sole feldspar but is subordinate to quartz. It is slightly–moderately altered and forms anhedral grains in the groundmass and scattered subhedral porphyroclasts up to ca 2 mm in length. Biotite has two distinct modes of occurrence: 1) as relatively coarse grains with undulose extinction and commonly bent/curved cleavage planes, and 2) as recrystallised aggregates concentrated in irregular lenticles.\r\nThe gneiss contains minor garnet, as scattered porphyroblasts up to ca 2 mm in diameter. Other minor and accessory minerals include opaques and zircon. Myrmekite is present at the contacts between some feldspar grains. The gneiss is moderately to extensively altered. Calcite, sericite/muscovite (both mainly after plagioclase), and chlorite (mainly after biotite and garnet) are the most common secondary minerals.","SAMPLING_FEATURE_NAME":"KAN_0002_1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH887353","BOREHOLE_TOP_DEPTH_M":104.8,"BOREHOLE_BASE_DEPTH_M":107.9,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-17.0249014221,"LONG_GDA94":143.9246229847,"ELEV_M_AHD":155,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75850","AGE_REF":"Kositcin, N., Bultitude, R.J., 2024. New SHRIMP U-Pb ages from the Georgetown and Cairns regions, Queensland: NE Queensland Solid Geology Project, 2023-2024. Geoscience Australia. Record, 2024/51, 118p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/149794","AGE_ENTRY_DATE":"2024-09-24","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15161","geometry":{"type":"Point","coordinates":[131.96474776,-31.27286756]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15161,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9658292","IGSN":"10.60494/0hyk-zh60","SAMPLENO":9658292,"SAMPLE_ID":"1472756","AGE_MA":1690,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.72,"NUMBER_OF_ANALYSES":20,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed metasedimentary rocks, Fowler Domain, Gawler Craton","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Howard et al 2011 (PrecambrianRes): metapelitic gneiss with garnet, biotite, muscovite, quartz, plagioclase, ilmenite, sillimanite.","SAMPLING_FEATURE_NAME":"COL 20D","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938942","BOREHOLE_TOP_DEPTH_M":46.6,"BOREHOLE_BASE_DEPTH_M":47.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.2728675649,"LONG_GDA94":131.9647477619,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66479","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Belousova, E.A., 2011. U-Pb, Lu-Hf and Sm-Nd isotopic constraints on provenance and depositional timing of metasedimentary rocks in the western Gawler Craton: Implications for Proterozoic reconstruction models. Precambrian Research, 184(1-4), 43-62.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2010.10.002","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15493","geometry":{"type":"Point","coordinates":[136.7677177,-30.6176684]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15493,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083789","IGSN":"10.60494/07gp-yf70","SAMPLENO":11083789,"SAMPLE_ID":"OD743","AGE_MA":1590,"AGE_MA_UNCERTAINTY":16,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.41,"NUMBER_OF_ANALYSES":21,"CALCULATION_TYPE":"lower concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Apatite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: Coherent 193nm COMPexPro 110 UV excimer laser ablation system","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Pooled age with analyses from SampleID OD1068","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"vein hosted by Gawler Range Volcanics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"ACD 9","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH884349","BOREHOLE_TOP_DEPTH_M":827,"BOREHOLE_BASE_DEPTH_M":827,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.6176684,"LONG_GDA94":136.7677177,"ELEV_M_AHD":104,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Tasmania","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65375","AGE_REF":"Zang, W., Cowley, W.M., Fairclough, M., 2006. Maitland Special, South Australia 1:250 000 geological series explanatory notes sheet SI53-12. Geological Survey of South Australia, 1v, 62p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2018d040116","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15037","geometry":{"type":"Point","coordinates":[143.86039311,-17.00624729]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15037,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9402789","IGSN":"10.60494/2g9r-sz38","SAMPLENO":9402789,"SAMPLE_ID":"BB6017A","AGE_MA":1562,"AGE_MA_UNCERTAINTY":5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.33,"NUMBER_OF_ANALYSES":15,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"GA6506","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":null,"PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"PLb-Gt","UNIT_NAME_SOURCE":"solid geology unit PLb (INFORMAL_UNIT_NAME updated in 2025 using Queensland Detailed Solid Geology WMS)","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Basement core analysed from drillhole Karumba KAN_0004_1 consists mainly of fine-grained (sillimanite–) garnet–biotite paragneiss with well-developed compositional banding. The gneiss has been assigned to the same solid geology unit (unit PLb, GSQ’s digital solid geology coverage) as the gneiss intersected in drillhole Karumba KARU_0013_1 located ca 8 km farther west. The gneiss has an average groundmass grainsize of ca 0.5 mm and consists mainly of quartz and biotite together with minor garnet as small but conspicuous porphyroblasts. Other minor and accessory minerals include sillimanite, sodic plagioclase (as scattered untwinned, mainly anhedral grains up to ca 2 mm across), muscovite (generally associated with biotite), titanite, and zircon. Sparse myrmekitic intergrowths between quartz and feldspar are also present. Biotite grains commonly show undulose extinction and curved cleavage planes.\r\nRelatively coarse, black, irregular grains tentatively identified as secondary hematite (with red streak) after pyrite? is the main secondary mineral. Other secondary minerals include chlorite (after biotite and garnet), sericite/fine muscovite (mainly after sillimanite and relatively coarse muscovite), and calcite (after plagioclase). \r\nThe gneiss is extensively deformed, and the foliation is commonly crenulated.","SAMPLING_FEATURE_NAME":"KAN_0004_1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH887354","BOREHOLE_TOP_DEPTH_M":105.7,"BOREHOLE_BASE_DEPTH_M":107,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-17.0062472944,"LONG_GDA94":143.8603931085,"ELEV_M_AHD":156,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Kositcin, N.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75850","AGE_REF":"Kositcin, N., Bultitude, R.J., 2024. New SHRIMP U-Pb ages from the Georgetown and Cairns regions, Queensland: NE Queensland Solid Geology Project, 2023-2024. Geoscience Australia. Record, 2024/51, 118p.","AGE_PUBLICATION_LINKS":"https://doi.org/10.26186/149794","AGE_ENTRY_DATE":"2024-09-24","AGE_LAST_UPDATED":"2026-02-18"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15277","geometry":{"type":"Point","coordinates":[131.96474776,-31.27286756]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15277,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9658292","IGSN":"10.60494/0hyk-zh60","SAMPLENO":9658292,"SAMPLE_ID":"1472756","AGE_MA":1695,"AGE_MA_UNCERTAINTY":18,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.45,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":"unnamed metasedimentary rocks, Fowler Domain, Gawler Craton","UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"paragneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Howard et al 2011 (PrecambrianRes): metapelitic gneiss with garnet, biotite, muscovite, quartz, plagioclase, ilmenite, sillimanite.","SAMPLING_FEATURE_NAME":"COL 20D","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH938942","BOREHOLE_TOP_DEPTH_M":46.6,"BOREHOLE_BASE_DEPTH_M":47.5,"GEOLOGICAL_PROVINCE":"Gawler Craton","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-31.2728675649,"LONG_GDA94":131.9647477619,"ELEV_M_AHD":0,"ACCURACY_M":10,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66479","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Belousova, E.A., 2011. U-Pb, Lu-Hf and Sm-Nd isotopic constraints on provenance and depositional timing of metasedimentary rocks in the western Gawler Craton: Implications for Proterozoic reconstruction models. Precambrian Research, 184(1-4), 43-62.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2010.10.002","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15510","geometry":{"type":"Point","coordinates":[136.7909207,-30.5906264]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15510,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083825","IGSN":"10.60494/kqvw-8r51","SAMPLENO":11083825,"SAMPLE_ID":"OD306","AGE_MA":1596.7,"AGE_MA_UNCERTAINTY":7.1,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.22,"NUMBER_OF_ANALYSES":324,"CALCULATION_TYPE":"concordia (Ludwig)","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Apatite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: ion exchange chromatography","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Nu Plasma MC-ICPMS","LABORATORY_NAME":"University of Melbourne","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This apatite sample introduced as potential U-Pb reference. Sample OD306 is from the Acropolis Cu-Au prospect in South Australia.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"vein hosted by Gawler Range Volcanics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"ACD 19","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH1008529","BOREHOLE_TOP_DEPTH_M":897,"BOREHOLE_BASE_DEPTH_M":897,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.5906264,"LONG_GDA94":136.7909207,"ELEV_M_AHD":0,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Tasmania","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74359","AGE_REF":"McPhie, J., Ehrig, K.J., Kamenetsky, M.B., Crowley, J.L., Kamenetsky, V.S., 2020. Geology of the Acropolis prospect, South Australia, constrained by high-precision CA-TIMS ages. Australian Journal of Earth Sciences, 67(5), 699-716.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2020.1717617","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15546","geometry":{"type":"Point","coordinates":[136.7909207,-30.5906264]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15546,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083825","IGSN":"10.60494/kqvw-8r51","SAMPLENO":11083825,"SAMPLE_ID":"OD306","AGE_MA":1544.8,"AGE_MA_UNCERTAINTY":22.5,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.8,"NUMBER_OF_ANALYSES":null,"CALCULATION_TYPE":"upper concordia intercept","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/206Pb and 207Pb/206Pb","MINERAL":"Apatite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: RESOlution 193 nm ArF excimer laser","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7900","LABORATORY_NAME":"University of Tasmania","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":null,"LITHOLOGY":null,"MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"ACD 19","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH1008529","BOREHOLE_TOP_DEPTH_M":897,"BOREHOLE_BASE_DEPTH_M":897,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.5906264,"LONG_GDA94":136.7909207,"ELEV_M_AHD":0,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Tasmania","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"74359","AGE_REF":"McPhie, J., Ehrig, K.J., Kamenetsky, M.B., Crowley, J.L., Kamenetsky, V.S., 2020. Geology of the Acropolis prospect, South Australia, constrained by high-precision CA-TIMS ages. Australian Journal of Earth Sciences, 67(5), 699-716.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2020.1717617","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15251","geometry":{"type":"Point","coordinates":[133.9128265,-28.8057362]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15251,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034274","IGSN":"10.60494/f7cf-gy49","SAMPLENO":11034274,"SAMPLE_ID":"R967234","AGE_MA":1569,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.35,"NUMBER_OF_ANALYSES":23,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"monazite growth during high-grade metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This age is obtained from combining monazites found within 3 large garnet grains (3-5 cm) + bulk-rock monazite separates within the same sample. Age is interpreted to be high-T reworking during the 1570-1555 Ma Kararan Orogeny. This sample also dated by Cutts et al (2011; Lithos 124) via LA-ICPMS who obtained metamorphic ages of 1597 +/- 9 Ma. & 1578 +/- 7 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"AM/PB 1: Mabel Creek Ridge area of Nawa Domain","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Payne et al 2008 (UADL thesis): This sample is a garnet-sillimanite-cordierite-biotite granulite. The AM/PB 1 drillhole intersects magnetite-rich metasedimentary rocks at 152 m before passing into pelitic metasedimentary rocks ~30 m above the maximum depth of 356.2m. Samples for this study are taken from the pelitic interval and contain a single metamorphic mineral assemblage characterised by coarse-grained garnet (up to 5 cm), sillimanite (2-4 mm), biotite, cordierite (3-8 mm), quartz, magnetite and minor plagioclase. Garnet contains inclusions of quartz, Kfeldspar and sillimanite. Garnet is enclosed by a gneissic foliation but also overprints the foliation as evidenced by sillimanite and biotite inclusions that parallel the matrix foliation. Cordierite is generally enclosed by quartz and sillimanite, and is rarely found in contact with garnet, biotite or magnetite. No retrogression of this mineral assemblage is evident.","SAMPLING_FEATURE_NAME":"PB 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH894470","BOREHOLE_TOP_DEPTH_M":351.2,"BOREHOLE_BASE_DEPTH_M":351.9,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8057362,"LONG_GDA94":133.9128265,"ELEV_M_AHD":218,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-03-06","SAMPLE_ORIGINATOR":"Payne, J.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64576","AGE_REF":"Payne, J.L., Hand, M., Barovich, K.M., Wade, B.P., 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences, 55(5), 623-640.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120090801982595","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15476","geometry":{"type":"Point","coordinates":[133.9128265,-28.8057362]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15476,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034274","IGSN":"10.60494/f7cf-gy49","SAMPLENO":11034274,"SAMPLE_ID":"R967234","AGE_MA":1578,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.47,"NUMBER_OF_ANALYSES":32,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This sample also dated by Payne et al (2008; AJES 55) via LA-ICPMS who obtained a metamorphic age of 1569 +/- 8 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mabel Creek Ridge","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Payne et al 2008 (UADL thesis): This sample is a garnet-sillimanite-cordierite-biotite granulite. The AM/PB 1 drillhole intersects magnetite-rich metasedimentary rocks at 152 m before passing into pelitic metasedimentary rocks ~30 m above the maximum depth of 356.2m. Samples for this study are taken from the pelitic interval and contain a single metamorphic mineral assemblage characterised by coarse-grained garnet (up to 5 cm), sillimanite (2-4 mm), biotite, cordierite (3-8 mm), quartz, magnetite and minor plagioclase. Garnet contains inclusions of quartz, Kfeldspar and sillimanite. Garnet is enclosed by a gneissic foliation but also overprints the foliation as evidenced by sillimanite and biotite inclusions that parallel the matrix foliation. Cordierite is generally enclosed by quartz and sillimanite, and is rarely found in contact with garnet, biotite or magnetite. No retrogression of this mineral assemblage is evident.","SAMPLING_FEATURE_NAME":"PB 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH894470","BOREHOLE_TOP_DEPTH_M":351.2,"BOREHOLE_BASE_DEPTH_M":351.9,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8057362,"LONG_GDA94":133.9128265,"ELEV_M_AHD":218,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-03-06","SAMPLE_ORIGINATOR":"Payne, J.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67112","AGE_REF":"Cutts, K., Hand, M., Kelsey, D.E., 2011. Evidence for early Mesoproterozoic (ca. 1590 Ma) ultrahigh-temperature metamorphism in southern Australia. Lithos, 124(1-2), 1-16.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2010.10.014","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1704","geometry":{"type":"Point","coordinates":[131.683273,-26.319868]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1704,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3081601","IGSN":"10273/AU3081601","SAMPLENO":3081601,"SAMPLE_ID":"W-122a","AGE_MA":525,"AGE_MA_UNCERTAINTY":1,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"total fusion","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Ar/Ar","ISOTOPIC_RATIO":"40Ar/39Ar","MINERAL":"K-feldspar","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"age of shearing","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"ANU compilation","PROJECT":"ISOTOPE","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"W-122a","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS641322","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":"Mount Woodroffe area - Musgrave Block","STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.319868,"LONG_GDA94":131.683273,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72352","AGE_REF":"Camacho, A., McDougall, I., Armstrong, R., Braun, J., 2001. Evidence for shear heating, Musgrave Block, central Australia. Journal of Structural Geology, 23(6-7), 1007-1013.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0191-8141(00)00172-3","AGE_ENTRY_DATE":"2019-08-30","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1705","geometry":{"type":"Point","coordinates":[131.683273,-26.319868]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1705,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU3081601","IGSN":"10273/AU3081601","SAMPLENO":3081601,"SAMPLE_ID":"W-122a","AGE_MA":601,"AGE_MA_UNCERTAINTY":6,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"K/Ar","ISOTOPIC_RATIO":"40K/40Ar","MINERAL":"K-feldspar","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"unknown: unknown","ANALYTICAL_COLLECTION_SYSTEM":"unknown: unknown","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"age of shearing","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"ANU compilation","PROJECT":"ISOTOPE","STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"unnamed granulite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"granulite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"W-122a","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS641322","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":"Mount Woodroffe area - Musgrave Block","STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-26.319868,"LONG_GDA94":131.683273,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Waltenberg, K.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"72352","AGE_REF":"Camacho, A., McDougall, I., Armstrong, R., Braun, J., 2001. Evidence for shear heating, Musgrave Block, central Australia. Journal of Structural Geology, 23(6-7), 1007-1013.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/S0191-8141(00)00172-3","AGE_ENTRY_DATE":"2019-08-30","AGE_LAST_UPDATED":null}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15193","geometry":{"type":"Point","coordinates":[132.2554634,-29.6007933]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15193,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034270","IGSN":"10.60494/cze6-xq35","SAMPLENO":11034270,"SAMPLE_ID":"R650739","AGE_MA":1709,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.23,"NUMBER_OF_ANALYSES":21,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"NOTE: Original paper cites this sample is taken from depths 472.5-473.15, however the SA Rock Database cites this depth to SampleID 1643413. The depth associated with this SampleID 650739 is from 168.4-168.5. It is possible these 2 samples were combined, but this is not noted in the paper.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"borehole specimen","SAMPLE_DESC":"Howard et al 2011 (AJES): quartz-plagioclase-garnet-biotite-chlorite-magnetite-monazite gneiss. NOTE: Original paper cites this sample taken from depths 472.5-473.15, however the SA Rock Database cites this depth to SampleID 1643413. The depth associated with this SampleID 650739 is from 168.4-168.5. It is possible these 2 samples were combined.","SAMPLING_FEATURE_NAME":"OBD 12","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH880269","BOREHOLE_TOP_DEPTH_M":168.4,"BOREHOLE_BASE_DEPTH_M":473.15,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-29.6007933,"LONG_GDA94":132.2554634,"ELEV_M_AHD":237,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2004-08-09","SAMPLE_ORIGINATOR":"Howard, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67181","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Cutts, K.A., Belousova, E.A., 2011. U-Pb zircon, zircon Hf and whole-rock Sm-Nd isotopic constraints on the evolution of Paleoproterozoic rocks in the northern Gawler Craton. Australian Journal of Earth Sciences, 58(6), 615-638.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1080/08120099.2011.594905","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7356","geometry":{"type":"Point","coordinates":[128.66277,-26.024]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7356,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6661159","IGSN":"10273/AU6661159","SAMPLENO":6661159,"SAMPLE_ID":"187115.1","AGE_MA":1208,"AGE_MA_UNCERTAINTY":30,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.7,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Curtin University","AGE_INTERPRETED_FROM_SOURCE":"age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSWA","PROJECT":null,"STRATNO":74660,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU74660","STRAT_UNIT_NAME":"Wirku Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wirku Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"high grade metamorphic rock","LITHOLOGY":"migmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"COOPER_187115.1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS648920","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Musgrave Region","REGION_NAME_SOURCE":null,"STATE":"WA","COUNTRY":"AUS","LAT_GDA94":-26.024,"LONG_GDA94":128.66277,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":null,"AGE_REF":"Kirkland, CL, Bodorkos, S, Wingate, MTD and Smithies, RH 2009, 187115: diatexitic migmatite, Mount Aloysius; Geochronology Record 792: Geological Survey of Western Australia, 6p.","AGE_PUBLICATION_LINKS":"http://geodownloads.dmp.wa.gov.au/downloads/Geochron/pdfs/187115.1.pdf","AGE_ENTRY_DATE":"2020-10-23","AGE_LAST_UPDATED":"2020-11-16"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14875","geometry":{"type":"Point","coordinates":[139.30460679,-30.27280656]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14875,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655829","IGSN":"10.60494/zzan-7751","SAMPLENO":9655829,"SAMPLE_ID":"ME00PG2","AGE_MA":499,"AGE_MA_UNCERTAINTY":12,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"deformation","ISOTOPIC_SYSTEM":"Rb/Sr","ISOTOPIC_RATIO":"87Rb/86Sr and 87Sr/86Sr","MINERAL":"Muscovite; K-feldspar","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: ion exchange chromatography","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"Timing of deformation/folding pegmatite intruding basement rocks.","OTHER_AGE_INTERPRETED_FROM_SOURCE":"Could also approximate the magmatic crystallisation (i.e. emplacement) age of the pegmatite.","AGE_REMARK_FROM_SOURCE":"Two-point (muscovite-K-feldspar) isochron, with initial 87Sr/86Sr = 0.7308 +/- 0.0027 (2sigma)","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":27205,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU27205","STRAT_UNIT_NAME":"Mount Gee Sinter","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mt Gee Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"pegmatite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Elburg et al. (2003): A prominent folded pegmatite was found in schistose (probably altered Mt Neill granite: Elburg et al. 2001) basement rocks in Arkaroola Creek. The pegmatite is up to 1.2 m wide, with K-feldspar, muscovite and quartz towards its margin, and is more quartz rich in the middle. Tourmaline is found in the host rocks next to the pegmatite. Sample ME00PG2 consists of pieces of K-feldspar and muscovite that were chipped off this pegmatite. Dating of this sample was undertaken to obtain a maximum age of the Delamerian deformation.","SAMPLING_FEATURE_NAME":"ME00PG2","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917612","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Mount Painter Block","GEOLOGICAL_REGION_NAME":"Adelaide Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.2728065585,"LONG_GDA94":139.3046067884,"ELEV_M_AHD":null,"ACCURACY_M":200,"LOCATION_METHOD":"published report, method unknown","LOCATION_DESC":"Horizontal datum = AMG66 Zone 54; verified using creekside location of ME00PG2 (\"Folded pegmatite\"; Fig 1b of Elburg et al., 2003).","SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"University of Adelaide","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24593","AGE_REF":"Elburg, M.A., Bons, P.D., Foden, J., Brugger, J., 2003. A newly defined Late Ordovician magmatic-thermal event in the Mt Painter Province, northern Flinders Ranges, South Australia. Australian Journal of Earth Sciences, 50(4), 611-631.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1046/j.1440-0952.2003.01016.x","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15553","geometry":{"type":"Point","coordinates":[133.9128265,-28.8057362]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15553,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034274","IGSN":"10.60494/f7cf-gy49","SAMPLENO":11034274,"SAMPLE_ID":"R967234","AGE_MA":1597,"AGE_MA_UNCERTAINTY":9,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.89,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This sample also dated by Payne et al (2008; AJES 55) via LA-ICPMS who obtained a metamorphic age of 1569 +/- 8 Ma.","AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mabel Creek Ridge","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"core","SAMPLE_DESC":"Payne et al 2008 (UADL thesis): This sample is a garnet-sillimanite-cordierite-biotite granulite. The AM/PB 1 drillhole intersects magnetite-rich metasedimentary rocks at 152 m before passing into pelitic metasedimentary rocks ~30 m above the maximum depth of 356.2m. Samples for this study are taken from the pelitic interval and contain a single metamorphic mineral assemblage characterised by coarse-grained garnet (up to 5 cm), sillimanite (2-4 mm), biotite, cordierite (3-8 mm), quartz, magnetite and minor plagioclase. Garnet contains inclusions of quartz, Kfeldspar and sillimanite. Garnet is enclosed by a gneissic foliation but also overprints the foliation as evidenced by sillimanite and biotite inclusions that parallel the matrix foliation. Cordierite is generally enclosed by quartz and sillimanite, and is rarely found in contact with garnet, biotite or magnetite. No retrogression of this mineral assemblage is evident.","SAMPLING_FEATURE_NAME":"PB 1","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH894470","BOREHOLE_TOP_DEPTH_M":351.2,"BOREHOLE_BASE_DEPTH_M":351.9,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-28.8057362,"LONG_GDA94":133.9128265,"ELEV_M_AHD":218,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2006-03-06","SAMPLE_ORIGINATOR":"Payne, J.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67112","AGE_REF":"Cutts, K., Hand, M., Kelsey, D.E., 2011. Evidence for early Mesoproterozoic (ca. 1590 Ma) ultrahigh-temperature metamorphism in southern Australia. Lithos, 124(1-2), 1-16.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.lithos.2010.10.014","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15604","geometry":{"type":"Point","coordinates":[135.264316,-34.0328693]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15604,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11083943","IGSN":"10.60494/jy2m-e234","SAMPLENO":11083943,"SAMPLE_ID":"R10646","AGE_MA":2462,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":5,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP I","LABORATORY_NAME":"Australian National University","AGE_INTERPRETED_FROM_SOURCE":"metamorphic crystallisation","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"DATA REPROCESSED: Fanning (1997) originally reported a SHRIMP age of 2479 +/- 9 Ma (SampleID 5928RS/138), however, this age data has been recalculated for Fanning et al (2007) publication, which supersedes this previous age.","AGE_SOURCE":"GSSA/Original publication","PROJECT":null,"STRATNO":24076,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU24076","STRAT_UNIT_NAME":"Wangary Gneiss","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Wangary Gneiss","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metamorphosed acid igneous rock","LITHOLOGY":"orthogneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"R10646","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS1008649","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-34.0328693,"LONG_GDA94":135.264316,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Coastal outcrop 3 km west of Lake Hamilton","SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Bodorkos, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"65376; 73609","AGE_REF":"Fanning, C.M., 1997. Geochronological synthesis of southern Australia - Part 1 The Curnamona Province, and Part 2 The Gawler Craton. South Australia. Department of Mines and Energy. Open File Envelope, 8918, 76.; Fanning, C.M., Reid, A.J., Teale, G.S., 2007. A geochronological framework for the Gawler Craton, South Australia. Geological Survey of South Australia Bulletin, 55, 258p.","AGE_PUBLICATION_LINKS":"https://pid.sarig.sa.gov.au/document/2018d037833; https://pid.sarig.sa.gov.au/document/mesac19443","AGE_ENTRY_DATE":"2025-11-18","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.4262","geometry":{"type":"Point","coordinates":[141.2562583,-31.73638391]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":4262,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2533772","IGSN":"10273/AU2533772","SAMPLENO":2533772,"SAMPLE_ID":"NSWSJAF0095.01","AGE_MA":1584,"AGE_MA_UNCERTAINTY":16,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":7,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6319","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"Inserted from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 23 October 2019","PROJECT":null,"STRATNO":26257,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26257","STRAT_UNIT_NAME":"Cartwrights Creek Metasediments","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary siliciclastic rock","LITHOLOGY":"granofels","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"thin section","SAMPLE_DESC":"This sample was collected from Dense Camp Creek, approximately 17 km north of the township of Silverton. The sample is a cordierite andalusite granofels overprinted by a biotite-sillimanite foliation. It comprises a granoblastic quartz + biotite rich matrix studded with abundant circular cordierite poikiloblasts up to 0.6 mm and lesser andalusite (chiastolite) poikiloblasts of a similar size. Bedding features are locally evident within the cordierite poikiloblasts, along with randomly oriented biotite. Coarse porphyroblasts/poikiloblasts are enveloped by intergrown S1 sillimanite (fibrolite) and red-brown biotite. Rutile is abundant, particularly in association with biotite at andalusite porphyroblast margins. Cordierite and sillimanite poikiloblasts are strongly sericitised and andalusite porphyroblasts are partially pseudomorphed by coarse-grained muscovite. Graphite and locally tourmaline are abundant throughout.","SAMPLING_FEATURE_NAME":"NSWSJAF0095","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS599165","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.736383915,"LONG_GDA94":141.256258305,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Main, P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71968","AGE_REF":"Kositcin, N., Fitzherbert, J.A., Main, P.T., Waltenberg, K., 2018. New SHRIMP U-Pb zircon provenance and in situ monazite metamorphic ages from the Mount Robe Sub-block, Broken Hill, New South Wales: July 2015-June 2017. Geoscience Australia. 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Graphite and locally tourmaline are abundant throughout.","SAMPLING_FEATURE_NAME":"NSWSJAF0095","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS599165","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Broken Hill Region","REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-31.736383915,"LONG_GDA94":141.256258305,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":null,"SAMPLE_ORIGINATOR":"Main, P.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"71968","AGE_REF":"Kositcin, N., Fitzherbert, J.A., Main, P.T., Waltenberg, K., 2018. New SHRIMP U-Pb zircon provenance and in situ monazite metamorphic ages from the Mount Robe Sub-block, Broken Hill, New South Wales: July 2015-June 2017. Geoscience Australia. 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This constitutes reasonable evidence for pervasive, but incomplete, isotopic modification of monazite formed at ca 1770 Ma.","AGE_SOURCE":"Updated from Geochron Delivery (Geoscience Australia; http://www.ga.gov.au/geochron-sapub-web/), 20 September 2019","PROJECT":null,"STRATNO":26252,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU26252","STRAT_UNIT_NAME":"Albarta Metamorphics","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Alberta Metamorphics","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"pelite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"The sample was collected from a newly recognised extension of the Albarta Metamorphics south of Atniempa Waterhole. These high-grade metamorphic rocks outcrop in a remote part of the Limbla mapsheet. The outcrops are dominated by pelitic to psammitic stromatic metatextite. 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Joint NTGS-GA geochronology project: Arunta Region, Ngalia Basin,Tanami Region and Murphy Province July 2011-June 2012. Northern Territory Geological Survey Record, 2013-004, 39p.","AGE_PUBLICATION_LINKS":"https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82463","AGE_ENTRY_DATE":"2012-03-09","AGE_LAST_UPDATED":"2019-09-20"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1555","geometry":{"type":"Point","coordinates":[135.04043165,-23.56665366]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1555,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU2126687","IGSN":"10273/AU2126687","SAMPLENO":2126687,"SAMPLE_ID":"IC10GPW156B","AGE_MA":1749,"AGE_MA_UNCERTAINTY":8,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":1.4,"NUMBER_OF_ANALYSES":16,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":"GA6188","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":"Geoscience Australia","AGE_INTERPRETED_FROM_SOURCE":"Age of metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"The data and textural information indicate that metamorphism during the ca 1750 event was responsible for new growth of monazite, and/or significant isotopic resetting of monazite previously formed during the ca 1770 Ma event. 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A multi-technique evaluation of hydrothermal hematite Usingle bondPb isotope systematics: Implications for ore deposit geochronology. 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The timing and duration of the Delamerian Orogeny: Correlation with the Ross Orogen and implications for Gondwana assembly. 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Note that Table 2 of Foden et al. (2006) presents this date as 445.5 +/- 4.9 Ma, not 449 +/- 5 Ma.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":11189,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU11189","STRAT_UNIT_NAME":"Mannum Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mannum granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"intermediate intrusive rock","LITHOLOGY":"quartz diorite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Foden et al. (2006): The undeformed Mannum pluton (Turner and Foden 1996) is a high-level, potassic, rapakivi, (A-type) syenogranite. The intrusion has limited outcrop, but total magnetic intensity imagery shows that it clearly cross-cuts the Reedy Creek pluton and is part of an extensive series of post-tectonic A-type granites and lavas with associated mafic dikes and enclaves that extend to the southeast into Victoria (Turner et al. 1992). 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Magmatic-to-hydrothermal crystallization in the W-Sn mineralized Mole Granite (NSW, Australia) Part I: Crystallization of zircon and REE-phosphates over three million years - a geochemical and U-Pb geochronological study. 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[BSc. Honours thesis, unpublished]. Australian National University. Unpublished Report.","AGE_PUBLICATION_LINKS":"Not Recorded","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14804","geometry":{"type":"Point","coordinates":[139.21154366,-35.10814634]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14804,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655248","IGSN":"10.60494/5qra-ce39","SAMPLENO":9655248,"SAMPLE_ID":"MB1-2","AGE_MA":495.2,"AGE_MA_UNCERTAINTY":3.7,"AGE_CONFIDENCE_LEVEL":"1 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":1,"CALCULATION_TYPE":"single analysis","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"High-temperature metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"This value is presented in Table 2 and Table 3 of Foden et al. (2006), and has been compiled in preference to the Concordia age of 492.8 +/- 1.3 Ma presented in Figure 6 of Foden et al. (2006).","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":13536,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13536","STRAT_UNIT_NAME":"Murray Bridge Granite","INFORMAL_UNIT_NAME":"Monarto granite","UNIT_NAME_SOURCE":"Monarto Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"sill","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Foden et al. (2006): Folded, sill-like syn-D2 Monarto granite (sample BC-M2 of Foden et al. (2002)) yielded zircons that are colourless and euhedral with well-developed crystal faces showing fine oscillatory (magmatic) zonation overprinted by later post-D2 recrystallisation. The degree of recrystallisation of magmatic zonation is variable within the population, ranging from negligible to complete. Most crystals show some recrystallisation.","SAMPLING_FEATURE_NAME":"MB1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS912543","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":"Murray Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-35.1081463424,"LONG_GDA94":139.2115436584,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Co-ordinates provided in the paper are wrong, and have been replaced with those from the Foden et al. (2020) supplementary data (\"bcm2 M2\").","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Foden, J.D.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73610","AGE_REF":"Foden, J., Elburg, M.A., Dougherty-Page, J., Burtt, A., 2006. The timing and duration of the Delamerian Orogeny: Correlation with the Ross Orogen and implications for Gondwana assembly. Journal of Geology, 114(2), 189-210.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1086/499570","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14874","geometry":{"type":"Point","coordinates":[139.21154366,-35.10814634]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14874,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655248","IGSN":"10.60494/5qra-ce39","SAMPLENO":9655248,"SAMPLE_ID":"MB1-2","AGE_MA":494,"AGE_MA_UNCERTAINTY":11,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":2,"CALCULATION_TYPE":"isochron","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"238U/204Pb and 206Pb/204Pb","MINERAL":"Monazite; K-feldspar","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"High-temperature metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Two-point (monazite-feldspar) isochron, with initial 206Pb/204Pb = 19.14.","AGE_SOURCE":"Original publication","PROJECT":null,"STRATNO":13536,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU13536","STRAT_UNIT_NAME":"Murray Bridge Granite","INFORMAL_UNIT_NAME":"Monarto granite","UNIT_NAME_SOURCE":"Monarto Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"sill","SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"Foden et al. (2006): Folded, sill-like syn-D2 Monarto granite (sample BC-M2 of Foden et al. (2002)) yielded zircons that are colourless and euhedral with well-developed crystal faces showing fine oscillatory (magmatic) zonation overprinted by later post-D2 recrystallisation. The degree of recrystallisation of magmatic zonation is variable within the population, ranging from negligible to complete. Most crystals show some recrystallisation.","SAMPLING_FEATURE_NAME":"MB1","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS912543","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":"Murray Region","REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-35.1081463424,"LONG_GDA94":139.2115436584,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"Co-ordinates provided in the paper are wrong, and have been replaced with those from the Foden et al. (2020) supplementary data (\"bcm2 M2\").","SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Foden, J.D.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"73610","AGE_REF":"Foden, J., Elburg, M.A., Dougherty-Page, J., Burtt, A., 2006. The timing and duration of the Delamerian Orogeny: Correlation with the Ross Orogen and implications for Gondwana assembly. Journal of Geology, 114(2), 189-210.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1086/499570","AGE_ENTRY_DATE":"2024-07-12","AGE_LAST_UPDATED":"2024-09-27"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.1266","geometry":{"type":"Point","coordinates":[131.606015,-22.196856]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":1266,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU1574529","IGSN":"10273/AU1574529","SAMPLENO":1574529,"SAMPLE_ID":"2001083058","AGE_MA":1843,"AGE_MA_UNCERTAINTY":4,"AGE_CONFIDENCE_LEVEL":"95% confidence","AGE_MSWD":0.9,"NUMBER_OF_ANALYSES":10,"CALCULATION_TYPE":"not captured","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Zircon","MOUNT_ID":"Z4067","ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP II","LABORATORY_NAME":null,"AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"To test the equivalence of the distal Lander Rock Formation with metasediment in contact with the Ngadarunga Granite, a sample of metapelite within 100 m of the gradational margin of the granite, was obtained.  At this location the metapelite is metamorphosed to gneiss in which leucosomes of partial melt are present.  A random sample of 57 ages of zircon grains was measured.  Similarity with zircon ages in the granite is  evident.  The same age populations are present, with sparse Archaean grains, including two more than 3 Ga old, and increasing abundance towards progressively younger Proterozoic ages.  The detail of the youngest end of the age spectrum differs from that in the low grade Lander Rock Formation and is closer to that in the granite.  Two grains have individual ages of 1812 ± 8 Ma (¿) and 1817 ± 8 Ma (¿), similar to the youngest zircons found in the granite; the average age of these two grains is 1814 ± 11 Ma (2s).  There is a significant presence of ages younger than ca. 1860 Ma, with a group of 10 grains ¿ statistically defined, and excluding the youngest two analyses ¿ having an MSWD of  0.9 and average age of 1843 ± 4 Ma (2s). Interpreting a maximum deposition age from these data is complicated by the high grade metamorphic overprint in the rock.  It could be argued that the youngest ages reflect the effects of metamorphism instead of preserving detrital provenance ages, although the youngest zircons do form a continuum towards older ages and there is no clearly defined metamorphic group of zircons on either age or mineralogical criteria.   If the youngest dated zircons are unaffected by metamorphism, then the youngest individual grain is 1812 ± 16 Ma (2¿¿.  An alternative youngest component is given by the next-oldest statistically-defined group of 10 grains whose average age is 1843 ± 4 Ma (2¿).","AGE_SOURCE":"McLennan Compilation, 2015","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Lander Rock Beds","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"metasedimentary rock","LITHOLOGY":"metasedimentary rock","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":"partially melted, garnet-bearing pelitic metasediment","SAMPLING_FEATURE_NAME":"2001083058","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS133378","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Arunta Region","REGION_NAME_SOURCE":null,"STATE":"NT","COUNTRY":"AUS","LAT_GDA94":-22.196856,"LONG_GDA94":131.606015,"ELEV_M_AHD":673,"ACCURACY_M":100,"LOCATION_METHOD":"GPS observation","LOCATION_DESC":"adjacent to Ngadarunga granite, Mt Doreen area","SAMPLE_ACQUISITION_DATE":"2001-08-10","SAMPLE_ORIGINATOR":"Fraser, G.L.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"64736","AGE_REF":"Claoue-Long, J.C., Edgoose, C., 2008. The age and significance of the Ngadarunga Granite in Proterozoic central Australia. Precambrian Research, 166(1-4), 219-229.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2007.06.026","AGE_ENTRY_DATE":"2019-07-11","AGE_LAST_UPDATED":"2021-06-08"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.14089","geometry":{"type":"Point","coordinates":[151.5463054,-29.29087]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":14089,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU9655489","IGSN":"10.60494/9c0h-sc81","SAMPLENO":9655489,"SAMPLE_ID":"Paradise","AGE_MA":243.8,"AGE_MA_UNCERTAINTY":0.5,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":3,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"hydrothermal alteration","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"206Pb/238U","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"isotope dilution: isotope dilution","ANALYTICAL_COLLECTION_SYSTEM":"TIMS: Finnigan MAT 262","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"metasomatic crystallisation of monazite","OTHER_AGE_INTERPRETED_FROM_SOURCE":"244.1 +/-1.5 Ma - upper intercept","AGE_REMARK_FROM_SOURCE":"Metasomatic crystallization of monazite and zircon from Paradise Lode at 243.8 +/- 0.5 Ma (or 244.1 +/- 1.5 Ma, if we take the upper intercept age), i.e. significantly younger than the previous ages.","AGE_SOURCE":"MinView/Original publication(s)","PROJECT":null,"STRATNO":12035,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU12035","STRAT_UNIT_NAME":"Mole Granite","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Mole Granite","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"acid intrusive rock","LITHOLOGY":"granite","MODE_OF_OCCURRENCE":"pluton","SAMPLE_TYPE":"unknown","SAMPLE_DESC":"Biotite selvage around Sn, W mineralised vein. Schaltegger et al 2005 paraphrased \"At this locality a Sn and W-mineralized vein of 700m length cuts through both seriate and porphyritic granite (Fig. 1b). An approximately 30 cm wide biotite-rich selvage is developed at the southern end of the vein. The selvage is composed of ca. 90% (by volume) biotite, 4% fluorite, and 2% each of topaz, monazite, and zircon. \"","SAMPLING_FEATURE_NAME":"Paradise","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS917546","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"New England Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"NSW","COUNTRY":"AUS","LAT_GDA94":-29.29087,"LONG_GDA94":151.5463054,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Schaltegger, U.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"67426","AGE_REF":"Schaltegger, U., Pettke, T., Audetat, A., Reusser, E., Heinrich, C.A., 2005. Magmatic-to-hydrothermal crystallization in the W-Sn mineralized Mole Granite (NSW, Australia) Part I: Crystallization of zircon and REE-phosphates over three million years - a geochemical and U-Pb geochronological study. Chemical Geology, 220(3-4), 215-235.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.chemgeo.2005.02.018","AGE_ENTRY_DATE":"2024-02-23","AGE_LAST_UPDATED":"2024-03-21"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.15192","geometry":{"type":"Point","coordinates":[132.4424013,-30.9502263]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":15192,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU11034223","IGSN":"10.60494/6pp6-wp13","SAMPLENO":11034223,"SAMPLE_ID":"R1472785","AGE_MA":1664,"AGE_MA_UNCERTAINTY":7,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":0.52,"NUMBER_OF_ANALYSES":30,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"laser ablation: New Wave UP-213 Nd:YAG laser probe","ANALYTICAL_COLLECTION_SYSTEM":"ICPMS: Agilent 7500","LABORATORY_NAME":"University of Adelaide","AGE_INTERPRETED_FROM_SOURCE":"metamorphic age","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":null,"AGE_SOURCE":"GSSA/original publication(s)","PROJECT":null,"STRATNO":null,"STRAT_UNIT_PID":null,"STRAT_UNIT_NAME":null,"INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":null,"MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"foliated metamorphic rock","LITHOLOGY":"gneiss","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"drill chips/cuttings","SAMPLE_DESC":"Howard et al 2011 (PrecambrianRes): metapelitic gneiss with mineral assemblage of plagioclase, biotite, quartz, sillimanite, garnet and ilmenite","SAMPLING_FEATURE_NAME":"BAC 41","SAMPLING_FEATURE_TYPE":"BOREHOLE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/BH908490","BOREHOLE_TOP_DEPTH_M":42,"BOREHOLE_BASE_DEPTH_M":45,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-30.9502263,"LONG_GDA94":132.4424013,"ELEV_M_AHD":147,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2007-03-22","SAMPLE_ORIGINATOR":"Howard, K.E.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"66479","AGE_REF":"Howard, K.E., Hand, M., Barovich, K.M., Payne, J.L., Belousova, E.A., 2011. U-Pb, Lu-Hf and Sm-Nd isotopic constraints on provenance and depositional timing of metasedimentary rocks in the western Gawler Craton: Implications for Proterozoic reconstruction models. Precambrian Research, 184(1-4), 43-62.","AGE_PUBLICATION_LINKS":"https://doi.org/10.1016/j.precamres.2010.10.002","AGE_ENTRY_DATE":"2025-10-29","AGE_LAST_UPDATED":"2025-11-25"}},{"type":"Feature","id":"interpreted_age_samples_metamorphism.7899","geometry":{"type":"Point","coordinates":[140.8748472,-21.07986667]},"geometry_name":"SAMPLING_FEATURE_LOCATION","properties":{"AGE_NO":7899,"SAMPLE_PID":"https://pid.geoscience.gov.au/sample/AU6660823","IGSN":"10273/AU6660823","SAMPLENO":6660823,"SAMPLE_ID":"DGC96.2","AGE_MA":1599,"AGE_MA_UNCERTAINTY":10,"AGE_CONFIDENCE_LEVEL":"2 standard deviation","AGE_MSWD":null,"NUMBER_OF_ANALYSES":13,"CALCULATION_TYPE":"weighted mean","GEOLOGICAL_EVENT":"metamorphism","ISOTOPIC_SYSTEM":"U/Pb","ISOTOPIC_RATIO":"207Pb/206Pb","MINERAL":"Monazite","MOUNT_ID":null,"ANALYTICAL_EXTRACTION_SYSTEM":"SIMS: O- or O2- source","ANALYTICAL_COLLECTION_SYSTEM":"SIMS: SHRIMP unknown model","LABORATORY_NAME":"Unknown","AGE_INTERPRETED_FROM_SOURCE":"metamorphism","OTHER_AGE_INTERPRETED_FROM_SOURCE":null,"AGE_REMARK_FROM_SOURCE":"Metamorphic age; pooled data MDA is 1630+/-7 Ma uncorrected, and 1599+/-10 Ma corrected - here preferred corrected age as higher common Pb (0.08-0.35%)","AGE_SOURCE":"GSQ compilation, 2016","PROJECT":null,"STRATNO":25171,"STRAT_UNIT_PID":"https://pid.geoscience.gov.au/geologicFeature/au/SU25171","STRAT_UNIT_NAME":"Llewellyn Creek Formation","INFORMAL_UNIT_NAME":null,"UNIT_NAME_SOURCE":"Llewellyn Creek Formation","MATERIAL_TYPE":"rock","LITHOLOGY_GROUP":"low-intermediate grade metamorphic rock","LITHOLOGY":"psammite","MODE_OF_OCCURRENCE":null,"SAMPLE_TYPE":"outcrop specimen","SAMPLE_DESC":null,"SAMPLING_FEATURE_NAME":"DUCHESS_DGC96.2","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS648584","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":null,"GEOLOGICAL_REGION_NAME":"Mount Isa Region","REGION_NAME_SOURCE":null,"STATE":"QLD","COUNTRY":"AUS","LAT_GDA94":-21.07986667,"LONG_GDA94":140.8748472,"ELEV_M_AHD":null,"ACCURACY_M":500,"LOCATION_METHOD":"method unknown","LOCATION_DESC":null,"SAMPLE_ACQUISITION_DATE":"2000-01-01","SAMPLE_ORIGINATOR":"Jones, S.","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"24039","AGE_REF":"Giles, D., Nutman, A.P., 2002. SHRIMP U-Pb monazite dating of 1600 - 1580 Ma amphibolite facies metamorphism in the southeastern Mt Isa Block, Australia. 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It is therefore possible that the model age for the muscovite at 504 Ma reflects the timing of this event.","SAMPLING_FEATURE_NAME":"6526RS141","SAMPLING_FEATURE_TYPE":"FIELD SITE","SAMPLING_FEATURE_PID":"https://pid.geoscience.gov.au/samplingFeature/au/FS912539","BOREHOLE_TOP_DEPTH_M":null,"BOREHOLE_BASE_DEPTH_M":null,"GEOLOGICAL_PROVINCE":"Delamerian Orogen","GEOLOGICAL_REGION_NAME":null,"REGION_NAME_SOURCE":null,"STATE":"SA","COUNTRY":"AUS","LAT_GDA94":-35.7513395,"LONG_GDA94":138.0569483,"ELEV_M_AHD":null,"ACCURACY_M":100,"LOCATION_METHOD":"State or NT agency supplied location, method unknown","LOCATION_DESC":"Cape Couts, Kangaroo Island","SAMPLE_ACQUISITION_DATE":"3000-01-01","SAMPLE_ORIGINATOR":"Amdel","SAMPLE_PHOTO":"N","FIELDSITE_PHOTO":"N","AGE_REF_ID":"75090","AGE_REF":"Fanning, C.M., Webb, A.W., 1990. Geochronology service reports prepared by Amdel Ltd and another laboratory, for the period 6/10/1989 to 14/12/1990. South Australia. Department of Mines and Energy. 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