The Application of Electrical Geophysics to Gold Exploration at Mt Wright, North Queensland

Derek Webb; Barry James

doi:10.1071/ASEG2001ab146

ISSN: 2202-0586
E-ISSN:

oa The Application of Electrical Geophysics to Gold Exploration at Mt Wright, North Queensland
Authors Derek Webb^a and Barry James^b
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^a MIM Exploration Pty Ltd, Brisbane Qld, [email protected] ^b MIM Exploration Pty Ltd, Townsville Qld, [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/ASEG2001ab146
- Published online: 01 Dec 2001

Abstract

The gold resource at Mt Wright, located approximately 10km to the northwest of Ravenswood North Queensland, is uneconomic due to its depth. Definition of a shallower resource of similar grade would have a profound effect on the current Ravenswood operation. Recent exploration at and around Mt Wright has been directed toward this end.

Early IP surveys at Mt Wright showed that the mineralised system produced a low resistivity anomaly with moderate chargeability. Trial MIMDAS (MIM Distributed Acquisition System - MIM owned technology), using the pole-dipole/dipole-pole configuration, and CSAMT surveys proved that both techniques have much greater depth of investigation than conventional IP in the Mt Wright area. More than 25 square kilometres have since been 'screened', using MIMDAS and CSAMT, to >400m depth for systems similar to Mt Wright. Infil surveys around Mt Wright have mapped the extent of the alteration system and highlighted anomalous zones away from Mt Wright itself. Some of these have been drill tested.

MIMDAS and CSAMT have proven to be effective exploration tools in the Mt Wright area.

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References

A-Izzeddin, D., Harvey, K. 1, and Mclntosh, D. C, 1995. Mount Wright Gold Deposits, Ravenswood District, in Mineral Deposits of Northeast Queensland: Geology and Geochemistry, Contribution 52 (Ed. S. D. Beams), pp. 109 -115. (Economic Geology Research Unit, James Cook University of North Queensland: Townsville).
Croxford, N. J. W., 1992a. Petrology Report No. 1092-853 (Unpublished Report to MIM Exploration Pty. Ltd.).
Croxford, N. J. W., 1992b. Petrology Report No. 858 (Unpublished Report to MIM Exploration Pty. Ltd.).
England, R. N., 2000. Petrographic Notes for 23 Samples from Mount Wright. (Unpublished Report to MIM Exploration Pty. Ltd.).
Furniss, R., 1998. Paragenesis and Petrology of the Mount Wright Intrusive Complex, Mineralisation and Associated Alteration. (Unpublished M.Sc. Thesis - James Cook University of North Queensland: Townsville).
Harvey, K. J., 1998. Mount Wright Gold Deposit, in Geology of Australian and Papua New Guinea Mineral Deposits (Eds: D. A. Berkman and D. H. Mackenzie), pp. 675 - 678. (The Australasian Institute of Mining and Metallurgy: Melbourne).
James, B. A., 1997. MIM Exploration Pty. Ltd. Technical Memorandum No. 1997/022. (Unpublished).
Orr, T. H., 1995. The Mount Leyshon Gold Mine: Geology and Mineralisation in Mineral Deposits of Northeast Queensland: Geology and Geochemistry, Contribution 52 (Ed. S. D. Beams), pp. 117 - 135. (Economic Geology Research Unit, James Cook University of North Queensland: Townsville).
Pontual, S., 1994. Spectral Analysis of the Alteration Mineralogy in Samples from Mount Wright, Mount Success and Nolans, North Queensland: a Pilot Study. (Unpublished Report to MIM Exploration Pty. Ltd.).

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Article Type: Research Article

Keyword(s): CSAMT; Gold; IP; MIMDAS; Mt Wright

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