Mapping of a granite batholith using geological and remotely sensed data: the Mount Edgar Batholith, Pilbara Craton

Peter Wellman

doi:10.1071/EG998643

ISSN: 0812-3985
E-ISSN: 1834-7533

Mapping of a granite batholith using geological and remotely sensed data: the Mount Edgar Batholith, Pilbara Craton
Authors Peter Wellman^a
View Affiliations Hide Affiliations

^a Minerals Division, Australian Geological Survey Organisation, , P.O. Box 378, , Canberra, , ACT, , Australia, 2601, . Phone: (02) 6249 9653, Fax: (02) 6249 9983, Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 29, Issue 3-4, Sep 1998, p. 643 - 648
DOI: https://doi.org/10.1071/EG998643
- Published online: 01 Sep 1998

Abstract

The gamma-ray spectrometric data over an exposed granite batholith contains detailed information on its structure and composition. The information is poorly displayed in the conventional red-green-blue or hue-saturation-intensity colour-space images. Variation diagrams can be prepared showing the relationship between K, Th and U, and the data can be displayed as a map of distance along the average variation path, and deviation of the observed concentrations from this average variation path. Alternatively, the rocks can be separated into subdivisions of granite types, and these types mapped using separate classification layers.

For the Mount Edgar Batholith, gamma-ray spectrometry results are compared with the results from other techniques – rock sample geochemistry, petrography, air photo interpretation, field observations, structural studies, magnetic anomalies, and Landsat-5 Thematic Mapper data enhanced for geology. In this outcropping batholith the spectrometric data are thought to be superior technique in determining batholith structure and compositional variation, because of it has greater resolution than field mapping and rock sample geochemistry, and because of its tie to rock geochemistry that is lacking in magnetic anomalies.

Article metrics loading...

/content/journals/10.1071/EG998643

1998-09-01

2026-01-15

From This Site

/content/journals/10.1071/EG998643

dcterms_title,dcterms_subject,pub_keyword

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

10

5

Full text loading...

References

Blockley, J.G., 1980, The tin deposits of Western Australia with special reference to the associated granites: Geol. Surv. WA Min. Res. Bull. 12, 1–184.
Collins, W.J., 1983, Geological evolution of an Archaean batholith. PhD Thesis, University of La Trobe, Melbourne (unpubl.).
Collins, W.J., 1989, Polydiapirism of the Archaean Mount Edgar Batholith, Pilbara Block, Western Australia: Precambrian Res. 43, 41–62.
Collins, W.J. and Grey, C.M., 1990, Rb-Sr isotopic systematics of an Archaean granite-gneiss terrain: the Mount Edgar Batholith, Pilbara Block, Western Australia: Austral. J. Earth Sci. 37, 9–22.
Davy, R. and Lewis, J.D., 1986, The Mount Edgar Batholith, Pilbara area, Western Australia: geochemistry and petrography: Geol. Surv. WA Rep. 17, 1–43.
Glikson, A.Y., 1997, Mineral mapping in the north Pilbara Craton: a directed-principal-components-of-band-ratios method for correlating Landsat-5 Thematic Mapper spectral data with geology: AGSO Res. Newsletter 26, 1–4.
Hickman, A.H., 1983, Geology of the Pilbara Block and its environs: Geol. Surv. WA Bull. 127, 1–268
Milligan, PR. and Gunn, P.J., 1997, Enhancement and presentation of airborne geophysical data: AGSO J. Austral. Geol. Geophy. 17, 63–75.
Richardson, L.M., 1997, Marble Bar airborne geophysical survey, 1996 - operations report: Austr. Geol. Surv. Org. Record 1997/63, 1–57.

/content/journals/10.1071/EG998643

Article Type: Research Article

Keyword(s): gamma-ray; granite; magnetic anomaly; mapping; spectrometry

Most Cited This Month Most Cited RSS feed

- A comparison of smooth and blocky inversion methods in 2D electrical imaging surveys
  
  Authors M.H. Loke, Ian Acworth and Torleif Dahlin
- Reverse-Time Migration using the Poynting Vector
  
  Authors Kwangjin Yoon and Kurt J. Marfurt
- SkyTEM–a New High-resolution Helicopter Transient Electromagnetic System
  
  Authors K. I. Sorensen and Esben Auken
- An overview of a highly versatile forward and stable inverse algorithm for airborne, ground-based and borehole electromagnetic and electric data
  
  Authors Esben Auken, Anders Vest Christiansen, Casper Kirkegaard, Gianluca Fiandaca, Cyril Schamper, Ahmad Ali Behroozmand, Andrew Binley, Emil Nielsen, Flemming Effersø, Niels Bøie Christensen, Kurt Sørensen, Nikolaj Foged and Giulio Vignoli
- The Fast Marching Method: An Effective Tool for Tomographic Imaging and Tracking Multiple Phases in Complex Layered Media
  
  Authors Nicholas Rawlinson and Malcolm Sambridge
- 3-D Analytic Signal in the Interpretation of Total Magnetic Field Data at Low Magnetic Latitudes
  
  Authors Ian N. MacLeod, Keith Jones and Ting Fan Dai
- CMP cross-correlation analysis of multi-channel surface-wave data
  
  Authors Koichi Hayashi and Haruhiko Suzuki
- A new direct non-invasive groundwater detection technology for Australia
  
  Authors M. Schirov, A. Legchenko and G. Creer
- 3D inversion of airborne electromagnetic data using a moving footprint
  
  Authors Leif H. Cox, Glenn A. Wilson and Michael S. Zhdanov
- Notes On Rock Magnetization Characteristics In Applied Geophysical Studies
  
  Authors D. A. Clark and J. B. Emerson
More Less

Mapping of a granite batholith using geological and remotely sensed data: the Mount Edgar Batholith, Pilbara Craton

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed