Mapping non-magnetic, talc-bearing ultramafic rocks in the Kalgoorlie region using airborne hyperspectral data

Tom Cudahy; Robert Hewson; Stephen Barnes; Bruce Groenewald

doi:10.1071/ASEG2006ab029

ISSN: 2202-0586
E-ISSN:

oa Mapping non-magnetic, talc-bearing ultramafic rocks in the Kalgoorlie region using airborne hyperspectral data
Authors Tom Cudahy^a, Robert Hewson^b, Stephen Barnes^c and Bruce Groenewald^d
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^a CSlRO Exploration and Mining, , ARRC Kensington, , WA, , Australia, 6151, [email protected] ^b CSlRO Exploration and Mining, , ARRC Kensington, , WA, , Australia, 6151, [email protected] ^c CSlRO Exploration and Mining, , ARRC Kensington, , WA, , Australia, 6151, [email protected] ^d CSlRO Exploration and Mining, , ARRC Kensington, , WA, , Australia, 6151, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2006ab029
- Published online: 01 Dec 2006

Abstract

Previously unrecognised ultramafic units in the Kalgoorlie-Kanowna area have recently been discovered using airborne hyperspectral sensing. Some of these units are up to 1 km in length and 200 m in width and were identified through airborne mineral mapping of talc. These areas lack significant magnetic expression, have little or no outcrop or subcrop and comprise a surface dominated by talc-bearing soil pediment. Exploration drill spoil in these areas confirms the presence of weathered talc schists underlying the soils. These results suggest that even in well mapped areas of deeply weathered greenstone belts, airborne hyperspectral sensing can complement traditional geophysical data by mapping non-magnetic, talc-bearing ultramafic rocks, which may be potential hosts to massive nickel and base metal mineralisation.

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2006-12-01

2026-01-23

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References

Ahmat, A.L., 1995. Kanowna, WA. Western Australian Geological Survey, 1:100,000 Geological Series.
Cudahy, T.J., 1997. PIMA-II spectral characteristics of natural kaolins. CSIRO Exploration and Mining Report, 420R, 57 pages.
Cudahy, T.J., Caccetta, M., Cornelius, A., Hewson, R.D., Wells, M., Skwarnecki, M., Halley, S., Hausknecht, P.,Mason, P. and Quigley, M., 2005. Regolith geology and alteration mineral maps from new generation airborne and satellite remote sensing technologies; and Explanatory Notes for the Kalgoorlie-Kanowna 1:100,000 scale map sheet, remote sensing mineral maps. MERIWA Report No. 252, 1-114.
Hunter, W.M., 1988. Kalgoorlie, WA. Western Australian Geological Survey, 1:100,000 Geological Series.
Skwarnecki, M., 2005. Regolith-landform mapping and hyperspectral data for the Kalgoorlie-Kanowna area. Geological Survey of Western Australia, Record 2005/7, 49pp.

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Article Type: Research Article

Keyword(s): geological mapping.; hyperspectral; magnetics; magnetite; mineral mapping; talc; ultramafic

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oa Mapping non-magnetic, talc-bearing ultramafic rocks in the Kalgoorlie region using airborne hyperspectral data

Abstract

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