A new interpretation of Cambrian basement geology increases the prospectivity for Cu porphyries in western Victoria

Phil Skladzien; Ross Cayley; David Taylor; Mark McLean

doi:10.1071/ASEG2015ab185

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

ISSN: 2202-0586
E-ISSN:

oa A new interpretation of Cambrian basement geology increases the prospectivity for Cu porphyries in western Victoria
Authors Phil Skladzien^a, Ross Cayley^b, David Taylor^c and Mark McLean^d
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^a Geological Survey of Victoria, 10/121 Exhibition St, Melbourne, , VIC, [email protected] ^b Geological Survey of Victoria, 10/121 Exhibition St, Melbourne, , VIC, [email protected] ^c Geological Survey of Victoria, 10/121 Exhibition St, Melbourne, , VIC, [email protected] ^d Geological Survey of Victoria, 10/121 Exhibition St, Melbourne, , VIC, [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 - 3
DOI: https://doi.org/10.1071/ASEG2015ab185
- Published online: 01 Dec 2015

Abstract

Recent Geological Survey of Victoria work has confirmed the presence of the Miga Arc, a buried Andean-type Cambrian arc system in western Victoria.

Geophysical data sets, particularly magnetics and gravity, were interpreted to characterise the regional tectonic setting, and to gain a deeper understanding of poorly exposed bedrock of the southern Miga Arc, within the Geological Survey of Victoria’s Willaura Cu Porphyry project area.

Geophysical interpretation and modelling, and field mapping of Cambrian bedrock has identified new regional Late Silurian dextral faults which are important in understanding the distribution of Miga Arc rocks in western Victoria. The updated bedrock interpretation together with new geochemical results has significantly expanded the potential exploration fairway for Cu porphyries in rocks associated with the buried Miga Arc.

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References

Buckland G.L.1986 or 1987. Geology and mineral potential of the Mount Stavely Volcanic Complex. Geological Survey of Victoria Report 1984/59.
Cayley, R.A., Korsch, R., Kennett, B, Skladzien, P., Jones, L, Morand, V.J., Gibson, G. & Rawling, T.J., & Betts, P. G., 2011a. Results of deep seismic reflection imaging of the eastern Delamerian Orogen, South Australia and western Victoria, Australia. Data CD version: 4 March, 2011. GeoScience Victoria, Department of Primary Industries.
Cayley R. A. & Taylor D. H. 1997a. Grampians special map area geological report. Geological Survey of Victoria Report 107.
Cayley, R. A. & Taylor, D. H. 2001. Ararat 1:100 000 map area geological report. Geological Survey of Victoria Report 115.
Crawford, A.J., 1988. Cambrian. In: Douglas, J.G. & Ferguson, J.A. (eds) Geology of Victoria, 2nd edition. Geological Society of Australia, VIctorian Division, Melbourne, pp. 37 - 62.
Foden, J. D., Elburg, M.A., Dougherty-Page, J., & Burtt, A., 2006. The Timing and Duration of the Delamerian Orogeny: Correlation with the Ross Orogen and Implications for Gondwana Assembly. The Journal of Geology, 114, 189-210.
Morand, V.J., Wohlt, K.E., Cayley, R.A., Taylor, D.H., Kemp, A.I.S., Simons, B.A. & Magart, A.P.M., 2003a. Glenelg Special Map Area Geological Report. Geological Survey of Victoria Report 123, Geological Survey of Victoria.
Scheibner, E. 1985. Suspect terranes in the Tasman Fold Belt system, Eastern AustraIia, in: Howell, D. G. (ed.) Tectonostratigraphic Terranes in the Circum-Pacific region. Earth Sci. Ser. Circum-Pacific Counc. Energy miner. Resour. 1:493-514.

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Article Type: Research Article

Keyword(s): Cu porphyry; Delamerian; dextral strike-slip faults; geophysical modelling; Lachlan; Miga Arc; Mount Stavely Volcanic Complex

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oa A new interpretation of Cambrian basement geology increases the prospectivity for Cu porphyries in western Victoria

Abstract

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