GOLD: Bounty Gold Deposit, Western Australia: Magnetic and Electromagnetic Responses

John H Coggon; Robert A. Rutherford

doi:10.1071/ASEGSpec07_15

Geophysical Signatures of West Australian Mineral Deposits

ISSN: 2202-0586
E-ISSN:

oa GOLD: Bounty Gold Deposit, Western Australia: Magnetic and Electromagnetic Responses
Authors John H Coggon and Robert A. Rutherford
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 1994, Issue Geophysical Signatures of West Australian Mineral Deposits, Dec 1994, p. 233 - 240
DOI: https://doi.org/10.1071/ASEGSpec07_15
- Published online: 01 Dec 1994

Abstract

Mineralisation at the Bounty gold deposit is in a steeply plunging zone within a sheared iron-formation in the Archaean Forrestania greenstone belt. The gold was deposited together with pyrrhotite, replacing magnetite, but later dyke intrusion has converted pyrrhotite to magnetite adjacent to the dyke. Geophysical surveys have included magnetic and transient electromagnetic measurements. Magnetic data show the Bounty mineralisation is highly magnetic. The magnetic information has mainly been used to help map stratigraphy and structure, seeking favourable sites for mineralisation. An orientation transient electromagnetic survey showed that the Bounty orebody is a good conductor. More extensive surveys delineated an anomaly over the North Bounty deposit also, and discovered several other conductive zones which, so far, have been found only to be barren sulphidic shale and chert horizons.

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1994-12-01

2026-01-23

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References

CASWELL M.J., 1989. Nature and timing of mineralization at the Bounty Gold Mine: a BIF-hosted gold deposit in an amphibolite facies terrain. B.Sc. (Honours) thesis, The University of Western Australia, 43 pp. (unpublished).
CHIN R.J., HICKMAN A.H. & THOM R., 1984. Explanatory Notes on the Hyden 1:250000 Geological Sheet (SI 50-4), Western Australia. Geological Survey of Western Australia, Perth, 21 pp.
COGGON J.H., 1991. Geophysical practice in the Eastern Goldfields. In Jones O. & Misra V. (eds), Regional Conference on Geology, Mining and Metallurgical Practices in the Eastern Goldfields, pp. 111-126. Australasian Institute of Mining and Metallurgy, Kalgoorlie.
DAVIES B., 1990. Structural history of the Forrestania Greenstone Belt. Aztec Mining Company Ltd, Internal Report No. 410, 16 pp. (unpublished).
RUTHERFORD R.A., 1992. Bounty Gold Mine: deformation history and the development of ore fluid pathways within an iron formation host, Western Australia. M.Sc. thesis, The University of Tasmania, 88 pp. (unpublished).

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Article Type: Research Article

Keyword(s): Archaean iron-formation-hosted lode gold; electromagnetics; Hyden SI50-4; magnetics; Southern Cross Province

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Abstract

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