Authors / CoAuthors
Dulfer, H. | Thomas, C.M. | Cudahy, T.
Abstract
The world's first continental-scale Advanced Spaceborne Thermal Emissions and Reflectance Radiometer (ASTER) mosaic, and related mineral group maps for Australia, are being released at the 34th International Geological Congress. These products have 30 m pixel resolution across the continent and can be used to identify, map and characterise near-surface materials that are spatially and chemically associated with various types of ore deposits. For example, the ASTER maps show that the 200 km length of colluvial fans shedding eastward from the Northern Flinders Ranges comprise different mineralogical characteristics, presumably reflecting their provenance. Furthermore, the most eastward margins of these fans show patterns interpreted as being related to differences in the chemistry of the groundwaters migrating into the Lake Frome drainage system. Key ASTER products include the Opaque Index map which highlights reduced environments and, consequently, redox relationships; and the AlOH Group Composition map which indicates areas that are dominated by neutral-alkaline illitic/ smectitic soils in contrast to those comprising kaolinitic soils which form in more neutral-acid conditions. These mineral maps thus have the potential to assist exploration for uranium (mapping oxidised groundwater) and geothermal energy (tracing viable U-bearing source rocks/fluids and the associated active plumbing network).
Product Type
nonGeographicDataset
eCat Id
73731
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Custodian
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- External Publication
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2012-02-28T00:00:00
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geoscientificInformation
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