Authors / CoAuthors
Picard, K. | Bernardel, G. | Carroll, A.G. | Hashimoto, T. | Nicholas, W.A.
Abstract
In May 2013, Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS) undertook a collaborative seabed mapping survey (GA0340/ SOL5754) on the Leveque Shelf, a distinct geological province within the Browse Basin, offshore Western Australia. The purpose of the survey was to acquire geophysical and biophysical data on seabed environments over a previously identified potential CO2 injection site to better understand the overlying seabed habitats and to assess potential for fluid migration to the seabed. Mapping and sampling was undertaken across six areas using multibeam and single beam echosounders, sub-bottom profilers, sidescan sonar, underwater towed-video, gas sensors, water column profiler, grab samplers, and vibrocorer. Over 1070 km2 of seabed and water column was mapped using the multibeam and single beam echosounder, in water depths ranging between 40 and 120 m. The sub-surface was investigated using the multichannel and the parametric sub-bottom profilers along lines totalling 730 km and 1547 km in length respectively. Specific seabed features were investigated over 44 line km using the sidescan sonar and physically and sampled at 58 stations. Integration of this newly acquired data with existing seismic data will provide new insights into the geology of the Leveque Shelf. This work will contribute to the Australian Government's National CO2 Infrastructure Plan (NCIP) by providing key seabed environmental and geological data to better inform the assessment of the CO2 storage potential in this area of the Browse Basin. This data package brings together a suite of datasets which describe the seabed environments and shallow geology of the Leveque Shelf, Browse Basin.
Product Type
collection
eCat Id
83727
Contact for the resource
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
- Contact instructions
- Place and Communities
Keywords
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- Data Package
- ( Theme )
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- Bathymetry
- ( Theme )
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- marine environmental baselines
- ( Theme )
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- geochemistry
- ( Theme )
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- sedimentology
- ( Theme )
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- marine biodiversity
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Marine Geoscience
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- Published_External
Publication Date
2016-12-12T00:00:00
Creation Date
2015-01-01T00:00:00
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
These datasets have all been published on an individual basis. Consult the catalogue reference numbers for lineage information and authorship.
Parent Information
Extents
[-20.72, -11.51, 117.5, 126]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
%Carbonate and specific surface area of seabed sediments
Chlorophyll a b and c and phaeophytin a of seabed sediments
High Resolution Bathymetry Grids
High Resolution Multibeam Acoustic Backscatter Grids
Major and trace elements in seabed sediments
Oxygen uptake and CO2 release from seabed sediments based on core incubation experiments
Porosity measurements on seabed sediments
Processed multichannel sub bottom profiler data
Seabed gravel mud and sand content
Seabed sediment grainsize by sieve measurement
Seabed sediment laser measured grainsize data
SOL5754 (GA0340) Post Survey Report
Species identification of worms from grabs
Total chlorin concentrations and chlorin indices from seafloor sediments
Total organic carbon (TOC) and total nitrogen concentrations and isotopes of seabed sediments
Total sediment metabolism and porewater pH and salinity of seabed sediments
Source Information
Source data not available.