Name: Mud_Fraction_Organic_Isotopes_Specific_Surface_Area

Display Field: ga_sample1

Type: Feature Layer

Geometry Type: esriGeometryPoint

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. Bottom 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%.

Copyright Text: © 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

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 126.91210000000001
YMin: -12.217829999999935
XMax: 127.45223300000009
YMax: -11.328349999999944
Spatial Reference: 4326  (4326)

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Label: Mud Fraction Organics, Isotopes and Specific Surface Areas
Description:
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• objectid ( type: esriFieldTypeOID, alias: objectid )
• ga_sample_ ( type: esriFieldTypeDouble, alias: ga_sample_ )
• ga_sample1 ( type: esriFieldTypeString, alias: ga_sample1, length: 254 )
• sample_typ ( type: esriFieldTypeString, alias: sample_typ, length: 254 )
• longitude ( type: esriFieldTypeDouble, alias: longitude )
• latitude ( type: esriFieldTypeDouble, alias: latitude )
• water_dept ( type: esriFieldTypeDouble, alias: water_dept )
• sediment_d ( type: esriFieldTypeString, alias: sediment_d, length: 254 )
• d15n ( type: esriFieldTypeDouble, alias: d15n )
• d13c ( type: esriFieldTypeDouble, alias: d13c )
• toc ( type: esriFieldTypeDouble, alias: toc )
• tn ( type: esriFieldTypeDouble, alias: tn )
• surface_ar ( type: esriFieldTypeDouble, alias: surface_ar )
• shape ( type: esriFieldTypeGeometry, alias: shape )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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