Mapping alteration through the regolith at Kalgoorlie using airborne hyperspectral data

Tom Cudahy; Mike Caccetta; Martin Wells; Marian Skwarnecki

doi:10.1071/ASEG2006ab030

ISSN: 2202-0586
E-ISSN:

oa Mapping alteration through the regolith at Kalgoorlie using airborne hyperspectral data
Authors Tom Cudahy^a, Mike Caccetta^b, Martin Wells^c and Marian Skwarnecki^d
View Affiliations Hide Affiliations

^a CSIRO Exploration and Mining, , ARRC, Kensington, WA, , Australia, 6151, [email protected] ^b CSIRO Exploration and Mining, , ARRC, Kensington, WA, , Australia, 6151, [email protected] ^c CSIRO Exploration and Mining, , ARRC, Kensington, WA, , Australia, 6151, [email protected] ^d Geological Survey of Western Australia, , Kalgoorlie, WA, , Australia, 6430, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 8
DOI: https://doi.org/10.1071/ASEG2006ab030
- Published online: 01 Dec 2006

Abstract

This paper summarises key results from the recently completed MERIWA M370 project which demonstrated that new generation airborne hyperspectral technologies can deliver seamless accurate maps of mineral abundances and mineral physicochemistries for the 1:100 000 scale Kalgoorlie-Kanowna special mapsheet. Twenty-three mineral products were produced, most of which have significance for regolith and alteration mapping as well as improving our understanding/modelling of fundamental geologic processes. Key spectral-mineral products delivered for the M370 project include: kaolin disorder for mapping transported versus in situ regolith materials; gypsum for salt lakes; talc for mapping non-magnetic ultramafic rocks; white mica chemistry for Archaean hydrothermal alteration; and pyrophyllite, which previously had not been recognised. The mineral maps of white mica chemistry reveal “big footprint” hydrothermal cells that have important implications for Au exploration in the region.

Article metrics loading...

/content/journals/10.1071/ASEG2006ab030

2006-12-01

2026-01-25

From This Site

/content/journals/10.1071/ASEG2006ab030

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Anand, R.R. and Paine, M., 2002. Regolith geology of the Yilgarn Craton, Western Australia: Implications for exploration. Australian Journal of Earth Sciences, 49, 3-162.
Craig, M.A. and Anand, R.R., 1993. Kalgoorlie-Kurnalpi Regolith-Landform Map, 1:250,000 Special edition. Australian Geological Survey Organisation.
Cudahy, T.J., 1992. A model for the development of the regolith of the Yilgarn incorporating selected spectral information. CSIRO, IMEC, Division of Exploration Geoscience. Restricted Investigation Report No. 243R, 35 pages.
Cudahy, T.J., 1997a. PIMA-I1 spectral characteristics of natural kaolins. CSIRO Exploration and Mining Report, 420R, 57 pages.
Cudahy, T.J., 1997b. Geometry of the spectral-mineralogical alteration halo at Birthday South, Fimiston Gold Deposit, Western Australia. CSIRO Exploration and Mining Report, 421R, 69 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. MERTWA Report No. 252, 1-114.
Duke, E.F., 1994. Near infrared spectra of musocovite. Tschermak substitution and metamorphic reaction process. Implications for remote sensing. Geology, 22, 201-219.
Hughes, J.C. and Brown, G., 1979. A crystallinity index for soil kaolins and its relation to parent rock, climate and soil maturity. Journal of Soil Science, 30, 557-563.
Scott, K. and Yang, K., 1997. Spectral Reflectance Studies of white micas. CSIRO Exploration and Mining Report No. 439R, 41pp.
Skwarnecki, M., 2005. Regolith-landform mapping and hyperspectral data for the Kalgoorlie-Kanowna area. Geological Survey of Western Australia, Record 2005/7, 49pp.

/content/journals/10.1071/ASEG2006ab030

Article Type: Research Article

Keyword(s): alteration; geological mapping; hyperspectral; Kalgoorlie; mineral mapping; regolith

Most Cited This Month Most Cited RSS feed

- Inversion of data from electrical imaging surveys in water-covered areas
  
  Authors M. H. Loke and J. W. Lane
- Inversion of Magnetic Data from Remanent and Induced Sources
  
  Authors Robert G. Elllis, Barrry de Wet and Ian N. Macleod
- A comparison of smooth and blocky inversion methods in 2-D electrical imaging surveys
  
  Authors M. H. Loke, Ian Acworth and Torleif Dahlin
- Designing matched bandpass and azimuthal filters for the separation of potential-field anomalies by source region and source type
  
  Authors Jeffrey D. Phillips
- Bad Colour Maps Hide Big Features and Create False Anomalies
  
  Authors Peter Kovesi
- Practical 3D EM inversion – the P223F software suite
  
  Authors Art Raiche, Fred Sugeng and Glenn Wilson
- Estimating Noise Levels in AEM Data
  
  Authors Andy Green and Richard Lane
- Target delineation using Full Tensor Gravity Gradiometry data
  
  Authors Colm A. Murphy and James Brewster
- Transdimensional Monte Carlo Inversion of AEM Data
  
  Authors Ross C Brodie and Malcolm Sambridge
- The geotech VTEM time domain helicopter em system
  
  Authors Ken Witherly, Richard Irvine and Edward Morrison
More Less

oa Mapping alteration through the regolith at Kalgoorlie using airborne hyperspectral data

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed