Airborne EM surveys over the Barrow Creek Prospect, NT

Michael Sykes; Peter Wolfgram; John Hart; Jim Mckinnon-Matthews

doi:10.1071/ASEG2006ab174

ISSN: 2202-0586
E-ISSN:

oa Airborne EM surveys over the Barrow Creek Prospect, NT
Authors Michael Sykes^a, Peter Wolfgram^b, John Hart^c and Jim Mckinnon-Matthews^d
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^a Fugro Airborne Surveys, 65 Brockway Rd Wembley, Western Australia, [email protected] ^b Fugro Airborne Surveys, 65 Brockway Rd Wembley, Western Australia ^c Minotaur Exploration Mithril Resources, 247 Greenhill Rd Dulwich, South Australia, [email protected] ^d Minotaur Exploration Mithril Resources, 247 Greenhill Rd Dulwich, South Australia
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 10
DOI: https://doi.org/10.1071/ASEG2006ab174
- Published online: 01 Dec 2006

Abstract

Three time-domain airborne EM surveys were recently flown over a known mineral deposit at Barrow Creek, NT. The Ni/Cu/Ag deposit is located in an area characterised by variable conductive overburden and is considered a difficult exploration target.

Data from the three airborne systems and a moving loop ground EM survey were processed and analysed to compare the relative abilities of the systems to locate the target.

It was found that the fixed-wing systems (TEMPEST and GEOTEM) produced clear responses to the known mineralisation that were consistent with the model developed from the ground EM responses. The EM responses measured with the helicopter system (HoistEM) did not indicate the target.

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2006-12-01

2026-01-19

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References

Boyd, G.W., 2004, HoistEM – A new airborne electromagnetic system: PACRIM, Adelaide.
Buselli, G., McCracken, K.G., and Thorburn, M., 1982, Transient electromagnetic measurements over the Teutonic Bore orebody during the overburden stripping phase of mining: Investigation Report 139, Institute of Energy and Earth Resources, CSIRO.
Lane, R., Green, A., Golding, C., Owers, M., Pik, P., Plunkett, C., Sattel, D., and Thorn, B., 2000, An example of 3D conductivity mapping using the TEMPEST AEM system: Exploration Geophysics 31, 162-172.
Macnae, J., King, A., Stolz, N., Osmakoff, A., and Blaha, A., 1998, Fast AEM data processing and inversion: Exploration Geophysics, 29, 163-169.
Raiche, A., 1998, Modelling the time-domain response of AEM systems: Exploration Geophysics 29, 103-106.
Smith, R.S., and West, G.F., 1988, An explanation of abnormal TEM responses: coincident-loop negatives and the loop effect: Exploration Geophysics, 53, 435-446.
Wolfgram, P., and Hallett, M., 1999, Advances in airborne electromagnetics: Preview October 1999, 8-9.

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Article Type: Research Article

Keyword(s): Airborne; Electromagnetic; GEOTEM; HoistEM; Minerals; TEMPEST

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