+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

High-resolution mapping using a sub-audio magnetic survey at the Comet gold mine, Western Australia

High-resolution mapping using a sub-audio magnetic survey at the Comet gold mine, Western Australia

TAO, Terrestrial, Atmospheric and Oceanic Sciences 22.4

The Comet Gold Mine in the Murchison mineral field lies within the Yilgarn Craton of Western Australia. Gold mineralization in this area is associated with a series of north-northeasterly trending structures, and has a long exploration history with some previous geophysical information. Other exploration information, such as geology and drill hole data, are integrated with the geophysical results to study the geophysical responses and generate a geophysical interpretation map. The response from the sub-audio magnetic (SAM) survey was investigated over an area of 13 sq km. The SAM survey was completed using a transmitter current of 5-8 Amp with a 50% duty cycle at 4 Hz frequency, which was considered a good instrumental setting for the Comet area. SAM anomalies were compared to results obtained from other geophysical methods and then integrated with geological data to generate a geophysical interpretation map at a 1:5000 scale. The new interpretation of geological units and structures at the Comet area should provide a better understanding of the geological and structural setting for mineralization in the Comet area. Our results show that the Comet Fault represents a faulted limb of the Comet fold structure that has both limbs dipping to the southeast and a plunge to the northeast. Magnetic anomalies associated with sedimentary iron formation (SIF) are considered to be well correlated with some gold bearing horizons and the location of the Comet Fault, which has become more siliceous and has been altered by sulphide minerals and magnetite minerals.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 037072309

Download citation: RISBibTeXText

DOI: 10.3319/tao.2011.03.30.01(tt)

Related references

Sub-audio magnetic survey experiments for high-resolution, subsurface mapping of regolith and mineralisation at the Songvang gold mine near Agnew, Western Australia. Exploration Geophysics 36(2): 125-132, 2005

Sub-audio magnetic survey experiments for high-resolution, subsurface mapping of regolith and mineralisation over a blind gold discovery near Agnew in Western Australia. 2004

Significance of geological control on assay data in the narrow, high-grade gold quartz veins at the Sand Queen Mine, Comet Vale, Western Australia. Australasian Institute of Mining and Metallurgy 09/2008: 71-78, 2008

High-resolution mapping using SAM surveys over the Bogada Bore gold prospect, Western Australia. Exploration Geophysics 36(2): 140-146, 2005

Development of a high grade underground gold mine Golden Crown Gold Mine, Cue, Western Australia. 1987

Interpretation of a sub-audio magnetic survey over the Lena Shear near Cue, Western Australia. Exploration Geophysics 36(2): 176-180, 2005

High resolution versatile time domain electromagnetic VTEM survey for copper gold mineralisation in the Naracoota Volcanics of Western Australia. Perth, West. Aust., Australia (AUS): Australian Society of Exploration Geophysicists, 2010

Sub-audio magnetics (SAM); a high resolution technique for simultaneously mapping electrical and magnetic properties. Exploration Geophysics 24(3-4): 387-399, 1993

High-resolution seismic reflection survey in a deep gold mine. SEG Annual Meeting Expanded Technical Program Abstracts with Biographies 66: 2069-2071, 1996

The Comet Mine, Marble Bar, Western Australia. Australian Gem and Treasure Hunter 79: 42, 1983

Shallow high-resolution seismic imaging of the Three Springs talc mine, Western Australia. The Leading Edge (Tulsa, OK) 21(9): 923-926, 2002

Unconformity-related weathered laterite profiles at Mt Gibson gold mine, Yilgarn Craton, Western Australia: implications for regolith mapping and geochemical exploration. West Australian Geologist 377: 1, 3, 1998

Progressive carbonation of high-Mg basalts during greenschist metamorphism, Victory gold mine, Kambalda, Western Australia. Abstracts with Programs - Geological Society of America 17(7): 548, 1985

The contribution of high resolution aeromagnetics to Archean gold exploration in the Kalgoorlie region, Western Australia. Economic Geology Monographs 6: 389-397, 1989

Morphology and composition of palaeochannel gold, Sunrise Dam gold mine, Western Australia. Pages 126 2005, 2005