Thick- and thin-skinned style deformation regimes, eastern Melbourne Zone – implications for tectonic evolution and mineral exploration in the Woods Point–Walhalla region

R. A. Cavley

doi:10.1071/ASEG2006ab024

ISSN: 2202-0586
E-ISSN:

oa Thick- and thin-skinned style deformation regimes, eastern Melbourne Zone – implications for tectonic evolution and mineral exploration in the Woods Point–Walhalla region
Authors R. A. Cavley^a
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^a GeoScience Victoria, GPO Box 4440, Melbourne, , Victoria, , 3001, Ross.Cay/[email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2006ab024
- Published online: 01 Dec 2006

Abstract

GeoScience Victoria (GSV) has recently completed detailed mapping and geophysical modelling of a large portion of the eastern Melbourne Zone in Central Victoria. This region encompasses the Walhalla and Woods Point goldfields, as well as subsidiary goldfields such as Enochs Point and Tallangallook.

The work has recognised two north-trending structural subzones. The western thick-skinned subzone abuts the eastern thin-skinned subzone along a high-angle fault system. This fault system links into a basal detachment system that may underlie both subzones and separates the Melbourne Zone from its structural basement: Cambrian igneous rocks that are part of the Selwyn Block. This new structural understanding helps explain the location of the main goldfields, which lie adjacent to the transition between the subzones.

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2026-01-18

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References

Cayley, R.A., Taylor, D.H., VandenBerg, A.H.M. & Moore, D.H., 2002. Proterozoic–Early Palaeozoic rocks and the Tyennan Orogeny in central Victoria: the Selwyn Block and its tectonic implications. Australian Journal of Earth Sciences, 49, 225–254
Gray D. R. 1995. Thrust kinematics and transposition fabrics from a basal detachment zone, eastern Australia. Journal of Structural Geology 17, 1637-1654.
Morley, C. K., 1986. Classification of thrust fronts. American Association of Petroleum Geologists Bulletin 70, 12–25.
Vandenberg A. H. M., Willman C. E., Hendrickx M. A., Bush M. D. & Sands B. 1995. The geology and prospectivity of the 1993 Mount Wellington Airborne Survey area. Geological Survey of Victoria VIMP Report 2.
Vandenberg A. H. M., Willman C. E., Maher S., Simons B. A., Cayley R. A., Taylor D. H., Morand V. I, Moore D. H. & Radojkovic A. 2000. The Tasman Fold Belt System in Victoria. Geological Survey of Victoria Special Publication.
VandenBerg, A H. M., Morand, V. J., Osborne, C. R., Seymon, A. R, Willman, C. E., Cayley, R. A., Haydon, S. J., McLean, M., Quinn, C. & Jackson, P., 2006. Walhalla —Woods Point-Tallangalook Gold Province-geology and mineral potential. Geological Survey of Victoria report 127.

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Article Type: Research Article

Keyword(s): Gold; Melbourne Zone; Mount Easton Province; Victoria; Walhalla; Woods Point

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oa Thick- and thin-skinned style deformation regimes, eastern Melbourne Zone – implications for tectonic evolution and mineral exploration in the Woods Point–Walhalla region

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