Data

Sediment oxygen demand in seabed sediments - Caswell Sub-basin, Browse Basin Marine Survey (GA0345/GA0346/TAN1411)

Geoscience Australia
Radke, L.C. ; Trafford, J.M.
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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=info:doi10.4225/25/575F851FBFC03&rft.title=Sediment oxygen demand in seabed sediments - Caswell Sub-basin, Browse Basin Marine Survey (GA0345/GA0346/TAN1411)&rft.identifier=10.4225/25/575F851FBFC03&rft.description=Geoscience Australia (GA) conducted a marine survey (GA0345/GA0346/TAN1411) of the north-eastern Browse Basin (Caswell Sub-basin) between 9 October and 9 November 2014 to acquire seabed and shallow geological information to support an assessment of the CO2 storage potential of the basin. The survey, undertaken as part of the Department of Industry and Science's National CO2 Infrastructure Plan (NCIP), aimed to identify and characterise indicators of natural hydrocarbon or fluid seepage that may indicate compromised seal integrity in the region. The survey was conducted in three legs aboard the New Zealand research vessel RV Tangaroa, and included scientists and technical staff from GA, the NZ National Institute of Water and Atmospheric Research Ltd. (NIWA) and Fugro Survey Pty Ltd. Shipboard data (survey ID GA0345) collected included multibeam sonar bathymetry and backscatter over 12 areas (A1, A2, A3, A4, A6b, A7, A8, B1, C1, C2b, F1, M1) totalling 455 km2 in water depths ranging from 90 - 430 m, and 611 km of sub-bottom profile lines. Seabed samples were collected from 48 stations and included 99 Smith-McIntyre grabs and 41 piston cores. An Autonomous Underwater Vehicle (AUV) (survey ID GA0346) collected higher-resolution multibeam sonar bathymetry and backscatter data, totalling 7.7 km2, along with 71 line km of side scan sonar, underwater camera and sub-bottom profile data. Twenty two Remotely Operated Vehicle (ROV) missions collected 31 hours of underwater video, 657 still images, eight grabs and one core.This catalogue entry refers to sediment oxygen demand measurements undertaken on seabed sediments (0-2 cm).Maintenance and Update Frequency: asNeededStatement: Bottom sediments were collected using a Smith McIntyre grab. Bulk sub-samples (6.5 ml) of surface sediment (0-2 cm) were incubated in BOD bottles filled with filtered seawater (0.2 um) for ~24 hrs in the dark at sea surface temperatures. Dissolved oxygen concentrations (and saturation values) were measured at the start and finish of each incubation. Results were expressed on a per g dwt basis utilising a separate sample to measure %water. Analyses were corrected for blanks (filtered seawater). The accuracies of the O2 measurements were +/- 1 mg/L. The accuracy of the scale used to measure wet/dry weights was better than 1%. Thanks to the crew of the RV Tangaroa for help with sample collection.&rft.creator=Radke, L.C. &rft.creator=Trafford, J.M. &rft.date=2015&rft.coverage=westlimit=122.3883; southlimit=-14.2865; eastlimit=124.6521; northlimit=-12.8678&rft.coverage=westlimit=122.3883; southlimit=-14.2865; eastlimit=124.6521; northlimit=-12.8678&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=marine survey&rft_subject=geological storage of CO2&rft_subject=seabed&rft_subject=geochemistry&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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https://www.protectivesecurity.gov.au/Pages/default.aspx

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Geoscience Australia (GA) conducted a marine survey (GA0345/GA0346/TAN1411) of the north-eastern Browse Basin (Caswell Sub-basin) between 9 October and 9 November 2014 to acquire seabed and shallow geological information to support an assessment of the CO2 storage potential of the basin. The survey, undertaken as part of the Department of Industry and Science's National CO2 Infrastructure Plan (NCIP), aimed to identify and characterise indicators of natural hydrocarbon or fluid seepage that may indicate compromised seal integrity in the region.
The survey was conducted in three legs aboard the New Zealand research vessel RV Tangaroa, and included scientists and technical staff from GA, the NZ National Institute of Water and Atmospheric Research Ltd. (NIWA) and Fugro Survey Pty Ltd. Shipboard data (survey ID GA0345) collected included multibeam sonar bathymetry and backscatter over 12 areas (A1, A2, A3, A4, A6b, A7, A8, B1, C1, C2b, F1, M1) totalling 455 km2 in water depths ranging from 90 - 430 m, and 611 km of sub-bottom profile lines. Seabed samples were collected from 48 stations and included 99 Smith-McIntyre grabs and 41 piston cores. An Autonomous Underwater Vehicle (AUV) (survey ID GA0346) collected higher-resolution multibeam sonar bathymetry and backscatter data, totalling 7.7 km2, along with 71 line km of side scan sonar, underwater camera and sub-bottom profile data. Twenty two Remotely Operated Vehicle (ROV) missions collected 31 hours of underwater video, 657 still images, eight grabs and one core.
This catalogue entry refers to sediment oxygen demand measurements undertaken on seabed sediments (0-2 cm).

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Maintenance and Update Frequency: asNeeded
Statement: Bottom sediments were collected using a Smith McIntyre grab. Bulk sub-samples (6.5 ml) of surface sediment (0-2 cm) were incubated in BOD bottles filled with filtered seawater (0.2 um) for ~24 hrs in the dark at sea surface temperatures. Dissolved oxygen concentrations (and saturation values) were measured at the start and finish of each incubation. Results were expressed on a per g dwt basis utilising a separate sample to measure %water. Analyses were corrected for blanks (filtered seawater). The accuracies of the O2 measurements were +/- 1 mg/L. The accuracy of the scale used to measure wet/dry weights was better than 1%. Thanks to the crew of the RV Tangaroa for help with sample collection.

Created: 2015

Issued: 03 06 2016

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124.6521,-12.8678 124.6521,-14.2865 122.3883,-14.2865 122.3883,-12.8678 124.6521,-12.8678

123.5202,-13.57715

text: westlimit=122.3883; southlimit=-14.2865; eastlimit=124.6521; northlimit=-12.8678

Subjects
Earth Sciences | Geology | Marine Data | Marine Geoscience | Published_External | WA | geochemistry | geological storage of CO2 | marine | marine environmental baselines | marine survey | oceans | seabed |

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Other Information
Download the data (xlsx)

url : https://d28rz98at9flks.cloudfront.net/83178/TAN1411_SOD.xlsx

Caswell Sub-basin - Browse Basin CO2 data package

url : https://pid.geoscience.gov.au/dataset/ga/84570

Identifiers
ACN 633 798 857