Discovery of the Eureka volcanogenic massive sulphide lens using down-hole electromagnetics

Jacob Paggi; Daniel Macklin

doi:10.1071/ASEG2015ab176

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

ISSN: 2202-0586
E-ISSN:

oa Discovery of the Eureka volcanogenic massive sulphide lens using down-hole electromagnetics
Authors Jacob Paggi^a and Daniel Macklin^b
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^a Independence Group NL, PO Box 496. South Perth, , WA, 6951, [email protected] ^b Independence Group NL, PO Box 496. South Perth, , WA, 6951, [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 - 4
DOI: https://doi.org/10.1071/ASEG2015ab176
- Published online: 01 Dec 2015

Abstract

The Eureka massive sulphide lens is the first new discovery of VMS mineralisation at the Stockman Project since 1979. The discovery was made in early 2013 through the integration of geophysical techniques, particularly down-hole electromagnetics, with a robust geological interpretation.

The lens is located approximately 350m northeast of the Currawong deposit, immediately along strike and beneath the Bigfoot lens at a depth of 360m. Though surface EM methods played key roles in the discovery of the main deposits at Currawong and Wilga, airborne and fixed-loop EM surveys failed to detect the Eureka lens due to its moderate conductance and increased depth. Interpretation of subtle DHTEM responses in two exploration drill holes was a key component of the discovery. Additional geological input, including short wavelength infrared modelling and structural reinterpretation, presented a compelling drill target, which led to the discovery of the Eureka massive sulphide lens.

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2015-12-01

2026-01-23

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References

Allen, R.L., 1992, Reconstruction of the tectonic, volcanic, and sedimentary setting of strongly deformed Zn-Cu massive sulphide deposits at Benambra, Victoria: Economic Geology, 87, 825-854.
Independence Group NL, 2013, Mineral resources and ore reserve estimates as at June 2013, <http://www.igo.com.au/ IRM/Company/ShowPage. aspx/PDF s/2589-6 803 7075/ MineralResourcesandOreReservesat30June2013>
Macklin, D., 2012, Deepfoot drill proposal: Independence Group NL (unpubl.)
Macklin, D., 2013, 2013 Phase 1 Eureka (Deepfoot) diamond drilling program review: Independence Group NL (unpubl.)
Rajagopalan, S., and Haydon, S.J., 1999, The Benambra volcanic hosted massive sulphide deposits. In A.J. Willocks, S.J. Haydon, M.W. Asten, and D.H. Moore (eds) Geophysical signatures of base metal deposits in Victoria: Geological Survey of Victoria Report 119 and Australian Society of Exploration Geophysicists, Special Publication, 11, 23-47.
Vandenberg, A. H.M., Hendrickx, M.A., Willman, C.E., Magart, A.P.M, Simons, B.A., and Ryan, S.M., 1998, The geology and prospectivity of the Benambra 1:100 000 map area, eastern Victoria: Geological Survey of Victoria Report 114.

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Article Type: Research Article

Keyword(s): DHTEM; Eureka; Stockman; volcanogenic massive sulphides

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oa Discovery of the Eureka volcanogenic massive sulphide lens using down-hole electromagnetics

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