Petrel Sub-basin Marine Survey (GA-0335 / SOL5463) (NLECI Program) - Seabed Geochemistry / Porewater TCO2 and TCO2 flux

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.

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Dataset citation

ANZLIC unique identifier: ANZCW0703016655

Title: Petrel Sub-basin Marine Survey (GA-0335 / SOL5463) (NLECI Program) - Seabed Geochemistry / Porewater TCO2 and TCO2 flux

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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The Petrel Sub-basin Marine Environmental Survey GA-0335, (SOL5463) was undertaken by the RV Solander during May 2012 as part of the Commonwealth Government's National Low Emission Coal Initiative (NLECI). The survey was undertaken as a collaboration between the Australian Institute of Marine Science (AIMS) and GA. The purpose was to acquire geophysical and biophysical data on shallow (less then 100m water depth) seabed environments within two targeted areas in the Petrel Sub-basin to support investigation for CO2 storage potential in these areas. This dataset constitutes TCO2 pools and fluxes calculated from bottle incubation experiments (24 hours).

ANZLIC search words:

GEOSCIENCES Geochemistry
MARINE Surveys

Spatial domain:

locality map

Geographic extent name: TIMOR SEA - TIMOR SEA - Ocean and Sea Regions - Australia

Geographic extent name: TIMOR SEA - TIMOR SEA - Drainage Divisions and Major River Basins - Australia

Geographic extent polygon: 128.8085 -12.642, 128.95 -12.642, 128.95 -12.8458, 128.8085 -12.8458, 128.8085 -12.642,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:: North bounding latitude: -12.642 °; South bounding latitude: -12.8458 °; East bounding longitude: 128.95 °; West bounding longitude: 128.8085 °

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Data currency

Beginning date: 2012-05-03

Ending date: 2012-05-31

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Dataset status

Progress: Complete

Maintenance and update frequency: Not Known

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Access

Stored data format:: DIGITAL - xls Microsoft Excel spreadsheet Excel WGS84

Available format type:: DIGITAL - xls Microsoft Excel spreadsheet Excel WGS84

Access constraints:

This material is released under the Creative Commons Attribution 3.0

Free Data Download

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Data quality

Lineage:

Bottom sediments were collected using a Smith McIntyre grab. Immediately after the grab was back aboard, the surface sediments were spooned into two 58 ml falcon vials for the vial incubation experiments. No later than 30 minutes after collection, the porewaters from one of the two falcon vials (time = zero (t0)) were extracted by centrifugation (8890 rpm; 5 minutes) and syringe-filtered (0.45 ?m) into 3 ml containers that had been pre-charged with 0.025 ml of mercuric chloride. Approximately 24 hours later, the second of the two falcon vials from each site (time = one (t1)) were sampled by the same method. The porewater extracts were stored in the refrigerator prior to analysis for TCO2 concentrations.These concentrations were measured at Geoscience Australia using an AS-C3 DIC analyser (Apollo SciTech), with a certified reference material as a standard.The TCO2 flux measurements represent the amount of CO2 produced by incubating sediment over a ~24 hour period, normalised to the volume of sediment used in the incubation. The TCO2 pool measurements constitute the TCO2 concentrations of the t=0 sample.

Positional accuracy:

Inherited from raw data in which C-NAV system was used to provide geographical position with a manufacturer accuracy of 10 cm RMS. Inherited from raw data in which an Applanix system was used to provide roll and pitch, and heave with manufacturer accuracies for roll and pitch are 0.05 deg. RMS, and manufacturer accuracy for heave is 5 cm.

Attribute accuracy:

Moderate. The typical precision and accuracy (? one standard deviation) of the TCO2 analyses are 0.2 ? 0.1 and 1.0 ? 0.4% respectively. More error would be introduced when normalising with sediment volumes as there would be errors associated with these estimates. It is also worth mentioning that the t=0 and t=1 samples are from different samples take from the same grab so that sediment heterogeneity might have some bearing on the results.

Logical Consistency:

Unknown

Completeness:

Complete

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Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

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Metadata information

Metadata date: 2013-03-08

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Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703016655.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703016655.xml

Authors:Radke, L.C.

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