The Que River TEM Case-Study

Guido Staltari

doi:10.1071/EG986125

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

The Que River TEM Case-Study
Authors Guido Staltari^a
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^a Geophysical Exploration Consultants Pty Ltd, , Suite 204, 104 Mount Street, Heidelberg, , Vic., 3084, , Australia
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 17, Issue 3, Sep 1986, p. 125 - 128
DOI: https://doi.org/10.1071/EG986125
- Published online: 01 Sep 1986

Abstract

Several years after the combined geophysical-geochemical discovery of the Que River gold-silver base-metal deposit in the Mt Read Volcanics of Tasmania, experimental SIROTEM and UTEM surveys were completed with the aim of determining their effectiveness in the search for similar volcanogenic ore types.

Of the two main mineralized ore lenses at Que River, only the subcropping, copper-rich S lens was clearly detected by both surveys. This lens had previously been detected by AEM and FEM surveys during the discovery program. On the other hand, the deeper lead-zinc-rich P lens, not previously detected by AEM and FEM surveys, nor recognized in the SIROTEM data, appears to have been detected by the UTEM survey. Furthermore an interpretation of the decay character of the P lens UTEM anomaly suggests that this lens has a greater conductance than the shallow S lens. Possible explanations for the lack of a distinctive SIROTEM response over the P lens are inadequate spatial resolution and poor coupling of the coincident loop geometry with the deeper, more steeply dipping mineralization.

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1986-09-01

2026-01-19

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References

Bulgakov Yu. I. (1971), ‘Interpreting surveyed results by the single loop transient process method’, in Fokin A. F., ed., The Method of Transient Processes in the Search for Sulphide Ore Deposits. USSR Ministry of Geology, Leningra.
Buselli G. & O‘Neill B. (1977), ‘SIROTEM, a new portable instrument for multichannel transient electromagnetic measurements’, Bull. Aust. Soc. Explor. Geophys.8, 82-7.
Lamontagne Y. (1975), ‘Applications of wideband, time domain EM measurements in mineral exploration’, PhD Thesis, University of Toronto.
McCracken K. G., Oristaglio M. L. & Hohmann G.W. (1985), ‘A comparison of electromagnetic exploration systems’, SEG (in press).
Silic J., Eadie E. T. & Jack D. J. (1985), ‘Application of time domain electromagnetic methods in the discovery of Hellyer ore deposit, Tasmania, Australia’, SEG Convention extended abstracts 241-3.
Staltari G. & Rutter H. (1984), A Workshop on Electromagnetics in Mineral Exploration. Earth Resources Foundation, Sydney.
Verma S. K., et al (1984), Atlas of Standard Curves for Coincident Loop TEM Interpretation. Centre for Geophysical Exploration Research, Sydney.
Webster S. S. & Skey E. H. (1979), ‘Geophysical and geochemical case history of the Que River deposit, Tasmania, Australia’, in Hood P. J., ed., Geophysics and Geochemistry in the Search for Metallic Ores. Geological Survey of Canada, Economic Geology Report 31, pp. 697-720.
West G. F., Macnae J. C. & Lamontagne Y. (1984), ‘A time-domain electromagnetic system measuring the step response of the ground’, SEG49, 1010-26.

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Article Type: Research Article

Keyword(s): conductance; copper mineralization; lead-zinc mineralization; Que River; SIROTEM survey; Tasmania; transient electromagnetics; UTEM survey; volcanogenic deposit

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The Que River TEM Case-Study

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