Geophysical Responses over the Cannington Ag-Zn-Pb Deposit-Queensland

Ken Witherly; Graeme Mackee

doi:10.1071/ASEG2015ab179

24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery

ISSN: 2202-0586
E-ISSN:

oa Geophysical Responses over the Cannington Ag-Zn-Pb Deposit-Queensland
Authors Ken Witherly^a and Graeme Mackee^b
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^a Condor Consulting, Inc., 2201 Kipling St Lakewood, CO, , USA, [email protected] ^b Geo Discovery Group Pty Ltd, PO Box 59, Sherwood, , QLD, , Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2015, Issue 24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery, Dec 2015, p. 1 - 5
DOI: https://doi.org/10.1071/ASEG2015ab179
- Published online: 01 Dec 2015

Abstract

The Cannington deposit is a high grade Ag-Zn-Pb deposit found in 1990 by BHP Minerals drilling an isolated 1,000 nT aeromagnetic feature. Following the discovery of Cannington, numerous airborne, ground and borehole surveys have been carried out which overall, provided some assistance at better defining the ore system but did not lead to the discovery of new major deposit in the area.

While Cannington possessed a clear magnetic response, the presence of a thick conductive cover made the use of EM and electrical techniques challenging. BHP used Cannington as a test ground for a variety of new techniques including a ground SQUID EM sensor, modified airborne EM technology (higher power and lower base frequency) and over 10 years after discovery, the first ever Falcon airborne gravity gradiometer survey in Australia.

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References

Bailey, A., 1998, Cannington silver-lead-zinc deposit: in Berkman, D. A. and Mackenzie, D. H., eds., Geology of Australian and Papua New Guinean mineral deposits: Melbourne, Australasian institute of mining and metallurgy, 783-792.
BHP Pty. Ltd. 1991, Aeromagnetic and radiometric survey of the Cannington area; Aerodat Holdings Ltd. Feb 1991.
BHP Pty. Ltd. 1995 Soldiers Cap / Tringadee J.V./ Jolimont J.V; Geotem 25 Hz survey; Aug 1995.
Busuttil S. 2006 South Cannington MIMDAS; Survey, Acquisition and Modelling Progress Report; Geophysical Resources and Services Pty. Ltd. March 2006.
Brescianini R.F. Asten, M.W., McLean, N. 1992, Geophysical characteristics of the Eloise Cu-Au deposit north-west Queensland Exploration Geophysics Jun 1992, Vol. 23, No. 1/2, pp. 33-42
Christensen, A. N., Mahanta, A.M., Boggs, D., Dransfield, M.H. 2001, Falcon airborne gravity gradiometer survey results over the Cannington Ag-Pb-Zn deposit, ASEG 15th Geophysical Conference and Exhibition, August 2001, Brisbane Expanded Abstracts
Fullagar, P. 2003 Comparison of Core & Model Magnetic Susceptibility at Cannington; report for BHPBilliton August 2003.
Velseis Processing 2003 Seismic Data Reprocessing 2002 Cannington Trial 2D Seismic Survey. June 2003.
Walters, S. Skrzeczynski, B., Whiting, T., Bunting, F. and Arnold, G. 2002, Discovery and Geology of the Cannington Ag-Pb-Zn Deposit, Mount Isa Eastern Succession, Australia: Development and Application of an Exploration Model for Broken Hill-Type Deposits Society of Economic Geologists, Special Publication 9, p. 65-93.
Whiting, T. 1998, An Overview of the Discovery of the Cannington Ag-Pb-Zn, presented at The National Lead, Zinc & Silver Symposium 25 & 26 March 1998, Brisbane QLD.

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Article Type: Research Article

Keyword(s): aeromagnetics; Cannington; minerals discovery

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