Regional gravity and regolith geochemistry as an integrated tool for mineral exploration

Sergey I. Shevchenko; Paul A. Morris; S.H. David Howard

doi:10.1071/ASEG2001ab131

ISSN: 2202-0586
E-ISSN:

oa Regional gravity and regolith geochemistry as an integrated tool for mineral exploration
Authors Sergey I. Shevchenko^a, Paul A. Morris^b and S.H. David Howard^c
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^a Geological Survey of Western, Australia, E-mail Address: [email protected] ^b Geological Survey of Western, Australia, E-mail Address: [email protected] ^c Geological Survey of Western, Australia, E-mail Address: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2001, Issue ASEG2001 - 15th Geophysical Conference, Dec 2001, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2001ab131
- Published online: 01 Dec 2001

Abstract

The Geological Survey of Western Australia has carried out helicopter-supported regional regolith sampling and gravity capture, based on a 4x4 km sampling grid. Started initially as a regolith-sampling program in 1994, gravity capture was added in 1998 with little increase in cost or time.

Each survey targets a 1:250 000 scale map sheet in less extensively explored parts of Western Australia, which invariably have poor gravity coverage. The gravity data provide valuable information on regional-scale structures and help in the interpretation of regolith chemistry. In conjunction with regional aeromagnetic surveys, the gravity data are also of use in regional mapping. In an area of Proterozoic and Archaean rocks in central Western Australia, areas of potential mineralization have been identified by combining gravity data with regolith chemistry and bedrock mapping to indicate where regional faults and shear zones have probably acted as conduits for mineralizing fluids.

The simultaneous capture of gravity data and regolith samples in the same field program is an effective approach to regional mineral exploration.

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2001-12-01

2026-01-19

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References

Bunting, J. A., 1980, Kingston, Western Australia 1:250000 Geological Series Explanatory Notes, 16p.
Bunting, J. A., 1986, Geology of the eastern part of the Nabberu Basin, Western Australia: Western Australia Geological Survey, Bulletin 131, 130p.
Fraser, A. R., and Pettifer, G. R., 1980, Reconnaissance gravity surveys in WA and SA, 1969-1972: Bureau of Mineral Resources, Geology and Geophysics, Bulletin 196, 60p.
Howard, S. H. D., and Shevchenko, S. I., 2000, Operations and processing methodology used in GSWA regional gravity surveys 1997-1999, Western Australian Geological Survey, Record 2000/6.
Jones, J. A., Pirajno, F., and Hocking, R. M., 2000, Stratigraphy, tectonic evolution and mineral potential of the Earaheedy Basin: GSWA 2000 extended abstracts, geological data for WA explorers in the new millenium, Western Australian Geological Survey Record, 2000/8, 11-13.
Morris, P. A., McGuinness, S. A., Sanders, A. J., and Coker, J., 2000, Geochemical mapping of the Stanley 1:250 000 sheet: Western Australia Geological Survey, 1:250 000 Regolith Geochemical Series Explanatory Notes, 53p.
Myers, J. S., and Hocking, R. M., 1998 Geological map of Western Australia 1:2 500 000 (13th edition): Western Australia Geological Survey.
Pirajno, F., 1999, Nabberu W.A. Sheet 3046:Western Australia Geological Survey, 1:100 000 Geological Series.
Pye, K. J., Morris, P. A., and McGuinness, S. A., 2000, Geochemical mapping of the Kingston 1:250 000 sheet: Western Australia Geological Survey, 1:250 000 Regolith Geochemical Series Explanatory Notes, 51p.
Shevchenko, S. I., 2001, Gravity data - Kingston and Stanley 1:250 000 sheets Western Australia.

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Article Type: Research Article

Keyword(s): aeromagnetic data; integration; mineralization; regional gravity; regolith geochemistry; structure

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