Citation

Geoscience Australia provides most of its products for free under a Creative Commons Attribution 3.0 Australia Licence. We only require that you reference the use of our data or information using the following citation:
Radke, L.C., Atkinson, I., Carey, M. & Trafford, J., 2014. Seabed environments and shallow geology of the Leveque Shelf, Browse Basin, Western Australia - Oxygen uptake and CO2 release from seabed sediments based on core incubation experiments.. Geoscience Australia, Canberra.

Abstract

Geoscience Australia undertook a marine survey of the Leveque Shelf (survey number SOL5754/GA0340), a sub-basin of the Browse Basin, in May 2013. This survey provides seabed and shallow geological information to support an assessment of the CO2 storage potential of the Browse sedimentary basin. The basin, located on the Northwest Shelf, Western Australia, was previously identified by the Carbon Storage Taskforce (2009) as potentially suitable for CO2 storage. 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 principal aim of the Leveque Shelf marine survey 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 Leveque Shelf area that may extend to the seabed. The survey also mapped seabed habitats and biota to provide information on communities and biophysical features that may be associated with seepage. This research, combined with deeper geological studies undertaken concurrently, addresses key questions on the potential for containment of CO2 in the basin's proposed CO2 storage unit, i.e. the basal sedimentary section (Late Jurassic and Early Cretaceous), and the regional integrity of the Jamieson Formation (the seal unit overlying the main reservoir). This dataset comprises total chlorin concentrations and chlorin indices from the upper 2cm of seabed sediments.
Google map showing geographic bounding box with values North bound -15.45 East bound 121.75 West bound 121.1 South bound -16.1
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Product Type/Sub Type

dataset - Marine Data

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2014

Product Type

dataset

Topic Category

oceans

Keywords

Marine Data
geochemistry
seabed
continental shelf
marine environmental baselines
marine
Marine Geoscience

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-15.45
East bound
121.75
West bound
121.1
South bound
-16.1

Lineage

Two 4.5cm diameter cores of surface sediment overlain by 0.118L of local seawater were incubated in the dark for ~4 hours at ~26oC after a ~3 hour pre-incubation period. Dissolved oxygen levels were measured at ~30 minute intervals. Samples for DIC analysis were taken at the start and finish of the incubation. Blank cores (local seawater only) accompanied all incubations. Dissolved inorganic carbon (DIC) were determined using a DIC analyser and infrared-based CO2 detector. (Geoscience Australia). CO2/O2 production/consumption rates were calculated by concentration differences (T=1 minus T=0) over the incubation period. Accuracy of the O2 measurments was +/- 0.1 mg/L. The %RSD of the precision/accuracies of the dissolved inorganic carbon analyses were 0.14 and 0.5% respectively. Thanks to the crew of the RV Solander for help with sample collection and to R. Falkner for the provision of DIC analyses.

Digital Transfer Options

onLine

DISTRIBUTION Format

xlsx

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

eff863a6-8b4f-19b4-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2014-09-02

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).