Authors / CoAuthors
Radke, L.C. | Webber, E.
Abstract
The Timor Sea and its tropical marine environment support significant and growing economic activity including oil and gas exploration. To reduce uncertainty in decision making regarding the sustainable use and ongoing protection of these marine resources, environmental managers and resource users require sound scientific information on the composition and stability of seabed environments and their biological assemblages. Surveys SOL4934 and SOL5117 to the eastern Joseph Bonaparte Gulf were undertaken in August and September 2009 and July and August 2010 respectively, in collaboration with the Australian Institute of Marine Science, with research collaborations from the RAN Australian Hydrographic Office, the Geological Survey of Canada and the Museum and Art Gallery of the Northern Territory. The purpose of these surveys were to develop biophysical maps, and deliver data and information products pertaining to complex seabed environment of the Van Diemen Rise and identify potential geohazards and unique, sensitive environments that relate to offshore infrastructure. This dataset comprises mineralogy of bulk and fine (<63 um) seabed sediment fraction (0-2cm). Some relevant publications are listed below: 1. Heap, A.D., Przeslawski, R., Radke, L., Trafford, J., Battershill, C. and Shipboard Party. 2010. Seabed environments of the eastern Joseph Bonaparte Gulf, Northern Australia: SOL4934 Post Survey Report. Geoscience Australia Record 2010/09, pp.81. 2. Anderson, T.J., Nichol, S., Radke, L., Heap, A.D., Battershill, C., Hughes, M., Siwabessy, P.J., Barrie, V., Alvarez de Glasby, B., Tran, M., Daniell, J. & Shipboard Party, 2011b. Seabed Environments of the Eastern Joseph Bonaparte Gulf, Northern Australia: GA0325/Sol5117 - Post-Survey Report. Geoscience Australia, Record 2011/08, 58pp. 3. Radke, L.C., Li, J., Douglas, G., Przeslawski, R., Nichol, S, Siwabessy, J., Huang, Z., Trafford, J., Watson, T. and Whiteway, T. Characterising sediments of a tropical sediment-starved continental shelf using cluster analysis of physical and geochemical variables. Environmental Chemistry, in press
Product Type
dataset
eCat Id
82526
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
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- Marine Data
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- marine survey
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- marine park
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- Continental Shelf
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- seabed
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- geochemistry
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- marine
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- AU-NT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Marine Geoscience
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- Published_External
Publication Date
2014-01-01T00:00:00
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Purpose
Maintenance Information
asNeeded
Topic Category
oceans
Series Information
Lineage
Ground sample powders from SOL4934 were submitted for X-ray Diffraction (XRD) at Geoscience Australia. The samples were scanned from 2o to 70o 2 at a step size of 0.02o and a speed of 2o per minute, using a SiemensTM D500/501 series X-ray Diffractometer (Siemens AG, Munich, Germany). Mineral identification software (EVATM) and SiroQuantTM (Sietronics Pty Ltd., Belconnen, Australia) were used to identify the d-spacings of mineral peaks and to determine the relative abundances of constituent minerals. Quantitative XRD analysis of clay fractions of 20 samples was undertaken at the CSIRO Land and Water Adelaide Laboratories by a method that is fully described in Douglas et al. (2010; below). The accuracy of the measurements are estimated at +/- 10%. G.B. Douglas, M. Kuhnen, L.C. Radke, G. Hancock, B. Brooke, M. Palmer, T. Piestch, P. Ford, M.G. Trefy, M.G., R. Packett, Delineation of sediment sources to a coastal wetland in the Great Barrier Reef catchment: influence of climate variability and land clearing since European arrival, Environmental Chemistry 2010, 7, 7. Thanks to the crew of the RV Solander for help with sample collection.
Parent Information
Extents
[-12.40465, -10.29883, 129.46056, 130.06327]
Reference System
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