{ "currentVersion": 10.91, "id": 4, "name": "Mud_Fraction_Organic_Isotopes_Specific_Surface_Area", "type": "Feature Layer", "description": "This data layer comprise organic carbon and nitrogen concentrations and isotopes and specific surface areas of the mud fraction (less than 63 um) of the upper 2 cm of seabed sediments.\nBottom sediments were collected using either a Smith McIntyre grab or Box Core. The upper ~0-2 cm of seabed sediment was spooned into a bag for the purpose of grainsize analysis. The less than 63um sieve fraction was freeze-dried, ground in a tungsten carbide mill and decarbonated. The decarbonated powders were sent to Environmental Isotopes Pty Ltd (Sydney) for isotopic analysis by mass spectrometry. Samples were back-corrected to account for the carbonate removal, using carbonate concentrations derived from the bomb method. Specific surface areas were determined using a 5-point Brunauer-Emmett-Teller (BET) adsorption isotherm on a Quantachrome NOVA 2200e analyser, with nitrogen used as the adsorbate. The samples were first cleaned of organic matter by slow heating for 12 hours to 350oC. Error estimates for the C and N isotope values are ±0.15. The carbonate measurements (used to back correct) were better than 5%. The average RSD of the specific surface area measurements was 7.5%.", "geometryType": "esriGeometryPoint", "sourceSpatialReference": { "wkid": 4326, "latestWkid": 4326 }, "copyrightText": "© Commonwealth of Australia (Geoscience Australia) 2016. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "drawingInfo": { "renderer": { "type": "simple", "symbol": { "type": "esriSMS", "style": "esriSMSCircle", "color": [ 136, 148, 0, 255 ], "size": 4, "angle": 0, "xoffset": 0, "yoffset": 0, "outline": { "color": [ 0, 0, 0, 255 ], "width": 1 } }, "label": "Mud Fraction Organics, Isotopes and Specific Surface Areas", "description": "" }, "transparency": 0, "labelingInfo": null }, "defaultVisibility": true, "extent": { "xmin": 126.91210000000001, "ymin": -12.217829999999992, "xmax": 127.45223299999998, "ymax": -11.32835, "spatialReference": { "wkid": 4326, "latestWkid": 4326 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeAsHTMLText", "displayField": "ga_sample1", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": [ { "name": "objectid", "type": "esriFieldTypeOID", "alias": "objectid", "domain": null }, { "name": "ga_sample_", "type": "esriFieldTypeDouble", "alias": "ga_sample_", "domain": null }, { "name": "ga_sample1", "type": "esriFieldTypeString", "alias": "ga_sample1", "length": 254, "domain": null }, { "name": "sample_typ", "type": "esriFieldTypeString", "alias": "sample_typ", "length": 254, "domain": null }, { "name": "longitude", "type": "esriFieldTypeDouble", "alias": "longitude", "domain": null }, { "name": "latitude", "type": "esriFieldTypeDouble", "alias": "latitude", "domain": null }, { "name": "water_dept", "type": "esriFieldTypeDouble", "alias": "water_dept", "domain": null }, { "name": "sediment_d", "type": "esriFieldTypeString", "alias": "sediment_d", "length": 254, "domain": null }, { "name": "d15n", "type": "esriFieldTypeDouble", "alias": "d15n", "domain": null }, { "name": "d13c", "type": "esriFieldTypeDouble", "alias": "d13c", "domain": null }, { "name": "toc", "type": "esriFieldTypeDouble", "alias": "toc", "domain": null }, { "name": "tn", "type": "esriFieldTypeDouble", "alias": "tn", "domain": null }, { "name": "surface_ar", "type": "esriFieldTypeDouble", "alias": "surface_ar", "domain": null }, { "name": "shape", "type": "esriFieldTypeGeometry", "alias": "shape", "domain": null } ], "geometryField": { "name": "shape", "type": "esriFieldTypeGeometry", "alias": "shape" }, "indexes": [ { "name": "r627_sde_rowid_uk", "fields": "objectid", "isAscending": true, "isUnique": true, "description": "" }, { "name": "a589_ix1", "fields": "shape", "isAscending": true, "isUnique": true, "description": "" } ], "subtypes": [], "relationships": [], "canModifyLayer": true, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query,Data", "maxRecordCount": 1000, "supportsStatistics": true, "supportsAdvancedQueries": true, "supportedQueryFormats": "JSON, geoJSON", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": true, "supportsHavingClause": true, "supportsCountDistinct": true, "supportsOrderBy": true, "supportsDistinct": true, "supportsPagination": true, "supportsTrueCurve": true, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": true }, "supportsDatumTransformation": true, "dateFieldsTimeReference": null, "supportsCoordinatesQuantization": true }