Petrel Sub-basin Marine Survey (GA-0335 / SOL5463) (NLECI Program) - Seabed Sediment Grain Size Data

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: ANZCW0703016746

Title: Petrel Sub-basin Marine Survey (GA-0335 / SOL5463) (NLECI Program) - Seabed Sediment Grain Size Data

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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Description

Abstract:

The Petrel Sub-basin Marine Survey GA-0335 (SOL5463) was undertaken on RV Solander during May 2012 as part of the Commonwealth Government's National Low Emission Coal Initiative (NLECI).

The survey was a collaboration between the Australian Institute of Marine Science (AIMS) and GA. The purpose was to acquire geophysical and biophysical data on shallow (less than 100 m water depth) seabed environments within two targeted areas in the Petrel Sub-basin to support the investigation of CO2 storage potential in these areas. Unconsolidated surface (seabed) sediments were collected at 11 sampling stations using a Smith_McIntyre grab (10L volume). Sediment samples were collected to provide data on a) sedimentology, b) infauna and c) the geochemical composition of the sediments.

For the sedimentology (this dataset) up to 250 g of sediment was sub-sampled from the surface (0-2 cm) of the sediment recovered in the Smith_McIntyre grabs. Sub-samples were described from visual inspection, noting grain size, sorting and composition and these were stored in plastic bags and refrigerated. These were subsequently analysed at the GA laboratories to provide information on the texture and composition of the sediments at the sampling locations. Grain size measurement was undertaken by wet sieving to determine mud (<63 microns), sand (63-2000 microns) and gravel (>2000 microns) fractions as percentage of dry weight. A separate sub-sample (~1g) was used for laser diffraction measurement of the mud and sand fractions using a Malvern Mastersizer 2000, with results expressed as percentage of the total particle volume based on an average of three measurements on each sample. Particle size distributions including mean, median, and standard deviation, together with skewness and kurtosis indices were calculated. Separate sample splits were taken for measurement of the carbonate content using the carbonate bomb method following Muller and Gastner (1979).

ANZLIC search words:

GEOSCIENCES
GEOSCIENCES Geomorphology
MARINE

Spatial domain:

locality map

Geographic extent name: JOSEPH BONAPARTE GULF - JOSEPH BONAPARTE GULF - Ocean and Sea Regions - Australia

Geographic extent polygon: 128.7511 -12.2962, 129.3271 -12.2962, 129.3271 -12.9354, 128.7511 -12.9354, 128.7511 -12.2962,

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

Geographic bounding box:: North bounding latitude: -12.2962 °; South bounding latitude: -12.9354 °; East bounding longitude: 129.3271 °; West bounding longitude: 128.7511 °

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Data currency

Beginning date: 2012-05-04

Ending date: 2012-05-30

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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 Universal Transverse Mercator (UTM) WGS84

Available format type:: DIGITAL - xls Microsoft Excel spreadsheet Excel Universal Transverse Mercator (UTM) WGS84

Access constraints:

This material is released under the Creative Commons Attribution 3.0

Free Data Download

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Data quality

Lineage:

Seabed sediments were collected using a Smith McIntyre grab from the RV Solander.

Positional accuracy:

Positional accuracy is inherited from raw data in which C-NAV system was used to provide geographical positions with a manufacturer's 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. There are however, spatial offsets between the C-NAV system of the ship and the location of the grab on the seabed that were not measured, but are presumed to be in the order of metres.

Attribute accuracy:

Attribute accuracy of the grain size measurements is good.

Logical Consistency:

unknown

Completeness:

This the complete dataset for grainsize from the samples recovered from the seabed by RV Solander during the survey (GA-0335/SOL5436).

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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/ANZCW0703016746.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703016746.xml

Authors:Nicholas W. A.

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