Authors / CoAuthors
Webber, E. | Pappas, W. | Thun, C. | de Caritat, P. | Cooper, M.
Abstract
The National Geochemical Survey of Australia aims to provide pre-competitive data and knowledge to support exploration for energy resources in Australia by documenting the chemical composition of Australia's regolith. It is a collaborative project between Geoscience Australia and all State and Northern Territory geological surveys, which commenced in 2007 and is due to conclude in mid-2011. A number of products, including a geochemical atlas of Australia, will be published. Over a two-year period, nearly 6000 samples from 1315 sites covering ~80% of Australia were analysed in the Geoscience Australia laboratories by XRF, ICP-MS and other associated techniques for major and trace elements. An analytical methodology was developed and tested through work on several pilot projects and trials during the development phase of the project. Samples were analysed by XRF using lithium metaborate fused beads at a dilution rate of 1:8. After XRF analysis of major elements and selected trace elements, a 200 mg sub-sample of this bead was acid-digested and analysed by reaction cell ICP-MS for trace elements. Quality was monitored by Certified Reference Materials, secondary standards, blind sampling duplicates, laboratory duplicates and analysis of some elements (Rb, Sr, Cu, Ni, Zr) by both instruments. This presentation will give an outline of the sampling and analytical methods used by the Geoscience Australia laboratories to ensure that results produced by the laboratory were accurate, consistent and traceable for the duration of the project.
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nonGeographicDataset
eCat Id
70982
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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2601
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Keywords
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- External PublicationConference Paper
- ( Theme )
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- geochemistry
- ( Theme )
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- regolith
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2011-01-01T00:00:00
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geoscientificInformation
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