HyMap of Broken Hill – imaging spectrometry for rock and mineral abundance mapping

Geoffrey R Taylor; Peter Hansford; Barney P J Stevens; Richard Barratt; David Robson

doi:10.1071/ASEG2004ab147

ISSN: 2202-0586
E-ISSN:

oa HyMap of Broken Hill – imaging spectrometry for rock and mineral abundance mapping
Authors Geoffrey R Taylor^a, Peter Hansford^b, Barney P J Stevens^c, Richard Barratt^d and David Robson^e
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^a University of New South Wales,, Australia, [email protected] ^b University of New South Wales, Australia, [email protected] ^c NSW Department of Mineral Resources, Australia, [email protected] ^d NSW Department of Mineral Resources, Australia ^e NSW Department of Mineral Resources NSW Department of Mineral Resources, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2004, Issue ASEG2004 - 17th Geophysical Conference, Dec 2004, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2004ab147
- Published online: 01 Dec 2004

Abstract

Imaging spectrometry (hyperspectral imagery) has been acquired for the Broken Hill Block. The data were acquired using the HyMap scanner on behalf of the New South Wales Department of Mineral Resources. Interpretation of the imagery for selected text sites demonstrates the capability to map a wide range of lithologies and minerals. Minerals mapped include iron oxides, garnets, micas, clay minerals and amphiboles. Lithologies mapped include all the lithologies present in the region and the surficial sediments. HyMap is also able to map certain lithologies critical to mineral exploration in the region, such as gahnite-bearing quartz, manganese-bearing garnetiferous rocks and sodium-rich micas indicative of likely mineral alteration. The mapping capabilities of the HyMap scanner are demonstrated using selected test sites but the lithology and mineral mapping has also been extended to cover a whole 1:25 000 map sheet.

It is suggested that the HyMap-derived information will form the vital surficial component in a three-dimensional view of the crust provided by geophysical data including gravity, magnetic, radiometric and imaging spectrometry.

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Article Type: Research Article

Keyword(s): Broken Hill; hyperspectral; imaging; lithology mapping; mineral abundance; spectrometry

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oa HyMap of Broken Hill – imaging spectrometry for rock and mineral abundance mapping

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