Authors / CoAuthors
Lambeck, A. | Huston, D. | Barovich, K.
Abstract
The development of a regional stratigraphy in Palaeoproterozoic basins within the Tanami region, Northern Australia has been hindered by the difficulty of discriminating sedimentary units and facies across isolated and poorly exposed basins. A regional stratigraphy is important as it provides constraints on sedimentary basin evolution and assists in gold exploration, as mineralisation is more abundant in certain rock formations. Based on geochemistry, five main sedimentary basin events have been identified in the Tanami region, ranging from poorly mixed local sedimentary sources to well mixed distal sources. Within the basins, major gold bearing lithologies are characterised by mafic source indicators: (1) high Cr/Th ratios; (2) low Th/Sc ratios; (3) low (La/Yb)N ratios relative to Post-Archaean Average Shale; (4) Eu anomaly equal to ~1 and, (5) distinctive ranges in initial Nd values, which together define vertical stratigraphic position. Potential future exploration target areas have been identified in the Tanami region at the Cashel and Sunline prospects using these geochemical parameters.
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nonGeographicDataset
eCat Id
68770
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- External Publication
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- geochemistry
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- gold
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- mineral exploration
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- isotopes
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- sedimentary basins
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- AU-NT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2009-03-31T00:00:00
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geoscientificInformation
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