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Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Grain size and carbonate concentrations of seabed sediment.

Geoscience Australia
Nicholas, W.A.
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/f3e99c90-cf38-2034-e044-00144fdd4fa6&rft.title=Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Grain size and carbonate concentrations of seabed sediment.&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/79176&rft.description=Geoscience Australia undertook a marine survey of the Vlaming Sub-basin in March and April 2012 to provide seabed and shallow geological information to support an assessment of the CO2 storage potential of this sedimentary basin. The survey was undertaken under the Australian Government's National CO2 Infrastructure Plan (NCIP) to help identify sites suitable for the long term storage of CO2 within reasonable distances of major sources of CO2 emissions. The Vlaming Sub-basin is located offshore from Perth, Western Australia, and was previously identified by the Carbon Storage Taskforce (2009) as potentially highly suitable for CO2 storage. The principal aim of the Vlaming Sub-basin marine survey (GA survey number GA334) was to look for evidence of any past or current gas or fluid seepage at the seabed, and to determine whether these features are related to structures (e.g. faults) in the Vlaming Sub-basin that may extend up to the seabed. The survey also mapped seabed habitats and biota in the areas of interest to provide information on communities and biophysical features that may be associated with seepage. This research addresses key questions on the potential for containment of CO2 in the Early Cretaceous Gage Sandstone (the basin's proposed CO2 storage unit) and the regional integrity of the South Perth Shale (the seal unit that overlies the Gage Sandstone). This dataset comprises grain size data and carbonate concentrations of the upper ~2cm of seabed sediment.Maintenance and Update Frequency: asNeededStatement: Sediment samples were collected using either a Van Veen or Shipek grab. In the laboratory, percentages of mud, sand and gravel were obtained from standard mesh-sieves, and volumetric grainsize curves for the &rft.creator=Nicholas, W.A. &rft.date=2014&rft.coverage=westlimit=115.297386; southlimit=-32.298055; eastlimit=115.461006; northlimit=-31.837511&rft.coverage=westlimit=115.297386; southlimit=-32.298055; eastlimit=115.461006; northlimit=-31.837511&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=oceans&rft_subject=Marine Data&rft_subject=marine environmental baselines&rft_subject=seabed&rft_subject=sedimentology&rft_subject=continental shelf&rft_subject=marine&rft_subject=WA&rft_subject=Marine Geoscience&rft_subject=EARTH SCIENCES&rft_subject=GEOLOGY&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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Geoscience Australia undertook a marine survey of the Vlaming Sub-basin in March and April 2012 to provide seabed and shallow geological information to support an assessment of the CO2 storage potential of this sedimentary basin. The survey was undertaken under the Australian Government's National CO2 Infrastructure Plan (NCIP) to help identify sites suitable for the long term storage of CO2 within reasonable distances of major sources of CO2 emissions. The Vlaming Sub-basin is located offshore from Perth, Western Australia, and was previously identified by the Carbon Storage Taskforce (2009) as potentially highly suitable for CO2 storage. The principal aim of the Vlaming Sub-basin marine survey (GA survey number GA334) was to look for evidence of any past or current gas or fluid seepage at the seabed, and to determine whether these features are related to structures (e.g. faults) in the Vlaming Sub-basin that may extend up to the seabed. The survey also mapped seabed habitats and biota in the areas of interest to provide information on communities and biophysical features that may be associated with seepage. This research addresses key questions on the potential for containment of CO2 in the Early Cretaceous Gage Sandstone (the basin's proposed CO2 storage unit) and the regional integrity of the South Perth Shale (the seal unit that overlies the Gage Sandstone). This dataset comprises grain size data and carbonate concentrations of the upper ~2cm of seabed sediment.

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Maintenance and Update Frequency: asNeeded
Statement: Sediment samples were collected using either a Van Veen or Shipek grab. In the laboratory, percentages of mud, sand and gravel were obtained from standard mesh-sieves, and volumetric grainsize curves for the <2 mm fraction were determined using a Malvern Mastersizer 2000 (ATA Scientific, Sydney) laser particle size analyser. Mean grainsize and the sediment sorting parameter were derived from laser analyses using GRADISTAT software (Blott and Pye 2001). Carbonate concetrations were determined on sediment using the carbonate bomb method. Blott, S.J., and Pye, K. (2001). Gradistat: A grain size distribution and statistics package for the analysis of unconsolidated sediments. Earth Surface Processes and Landforms 26, 1237-1248. Thanks to the crew of the RV Southern Supporter and Fugro for help with sample collection.

Issued: 2014

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115.46101,-31.83751 115.46101,-32.29806 115.29739,-32.29806 115.29739,-31.83751 115.46101,-31.83751

115.379196,-32.067783

text: westlimit=115.297386; southlimit=-32.298055; eastlimit=115.461006; northlimit=-31.837511

Subjects
Earth Sciences | Geology | Marine Data | Marine Geoscience | Published_External | WA | continental shelf | marine | marine environmental baselines | oceans | seabed | sedimentology |

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Other Information
Download the file (xlsx) (File download)

url : https://d28rz98at9flks.cloudfront.net/79176/Vlaming_sediment_data_forrelease.xlsx

An Integrated Study of the CO2 Storage Potential in the Offshore Vlaming Sub-Basin: Results of the study undertaken as part of the NCIP program

local : 79332

Seabed Environments and Shallow Geology of the Vlaming Sub-Basin, Western Australia - Supporting Investigation for Geological Storage of CO2 GA334 Marine Environmental Survey Post-Survey Report

local : 74626

Seabed Environments and shallow sub-surface geology of the Vlaming Sub-basin, offshore Perth Basin: Summary results from marine survey GA0334

local : 78846

Data and information on seabed environments of the Vlaming sub-basin, Western Australia

local : 79348

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