Underground Downhole Geophysics at CSA Mine, Cobar

Carswell J T, ; Smith C K, ; Erickson M E,
Organization: The Australasian Institute of Mining and Metallurgy
Pages: 6
Publication Date: Jan 1, 1990
Thirteen holes totalling 3200m were surveyed using a downhole time domain Geonics EM37 system at the 830 metre level within the CSA Mine, Cobar, New South Wales, in order to search for blind, electrically conductive sulphides at some distance from exploration drillholes. A significant off-hole conductor was detected in only one drillhole.Geophysical modelling and interpretation of the survey results indicated that this off-hole conductor was caused by a sulphide lens 30 metres from the drillhole at a hole depth of 220 metres.
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