- Title
- Airborne hyperspectral characterisation of hydrothermal alteration in a regolith-dominated terrain, southern Gawler Ranges, South Australia
- Creator
- Caruso, A. S.; Clarke, K. D.; Tiddy, C. J.; Lewis, M. M.
- Relation
- Australian Journal of Earth Sciences Vol. 68, Issue 4, p. 590-608
- Publisher Link
- http://dx.doi.org/10.1080/08120099.2020.1826122
- Publisher
- Taylor & Francis
- Resource Type
- journal article
- Date
- 2021
- Description
- Key alteration minerals associated with epithermal and porphyry Cu–Au mineralisation have been successfully identified using HyMap airborne hyperspectral imagery in a regolith-dominated terrain in the southern Gawler Ranges, South Australia. Alteration assemblages were mapped using Spectral Feature Fitting, a spectral matching algorithm, identifying the spatial distribution of localised advanced argillic and broader argillic alteration. X-ray diffraction (XRD) analysis was undertaken to independently identify the mineralogy of 57 surface soil and rock samples collected from the study area. This analysis confirmed the presence of key alteration minerals including alunite, pyrophyllite and dickite. The integration of spectral and XRD analytical techniques allowed interpretation of mineralogical patterns across the landscape. This study demonstrates that it is possible to identify surface alteration related to potential mineralisation using airborne hyperspectral imagery and semi-quantitative XRD even in a weathered regolith-dominated terrain.
- Subject
- mineral exploration; regolith-dominated terrrain; hyperspectral imagery; hymap; spectral feature fitting; x-ray diffraction; hydrothermal alteration; Gawler Ranges
- Identifier
- http://hdl.handle.net/1959.13/1460697
- Identifier
- uon:46034
- Identifier
- ISSN:0812-0099
- Language
- eng
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