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Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Chlorin analyses of seabed sediments.

Geoscience Australia
Radke, L.C. ; Trafford, J.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/25/54B8587583DE2&rft.title=Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Chlorin analyses of seabed sediments.&rft.identifier=10.4225/25/54B8587583DE2&rft.publisher=Geoscience Australia&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 chlorin analyses (total chlorins and chlorin indices) from seabed sediments (0-2 cm).Maintenance and Update Frequency: asNeededStatement: Bottom sediments were collected using a Shipek grab. Chlorins were extracted from freeze-dried sediment using the method of Schubert et al. (2005). Relative standard deviations of the precision estimates on duplicate samples averaged 2.5% for total chlorins and 1% for chlorin indices (the data for each sample is provided). Schubert, C.J., Niggemann, J., Klockgether, G., and Ferdelman, G., 2005. Chlorin Index: A new parameter for organic matter freshness in sediment. Geochemistry Geophysics and Geosystems 6(3), 1-12. Thanks to the crew of the RV Southern Supporter for help with sample collection, and Jessica Byass for preparing the samples for analysis.&rft.creator=Radke, L.C. &rft.creator=Trafford, J. &rft.date=2013&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=geochemistry&rft_subject=continental shelf&rft_subject=seabed&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 chlorin analyses (total chlorins and chlorin indices) from seabed sediments (0-2 cm).

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Maintenance and Update Frequency: asNeeded
Statement: Bottom sediments were collected using a Shipek grab. Chlorins were extracted from freeze-dried sediment using the method of Schubert et al. (2005). Relative standard deviations of the precision estimates on duplicate samples averaged 2.5% for total chlorins and 1% for chlorin indices (the data for each sample is provided). Schubert, C.J., Niggemann, J., Klockgether, G., and Ferdelman, G., 2005. Chlorin Index: A new parameter for organic matter freshness in sediment. Geochemistry Geophysics and Geosystems 6(3), 1-12. Thanks to the crew of the RV Southern Supporter for help with sample collection, and Jessica Byass for preparing the samples for analysis.

Issued: 2013

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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 | geochemistry | marine | marine environmental baselines | oceans | seabed |

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Other Information
Download the file (xls)

url : https://d28rz98at9flks.cloudfront.net/78550/78550_GA334_Chlorins_SD.xls

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

Identifiers
ACN 633 798 857