The special role of granite-cored domes to gold mineralisation: Architectural and geodynamic controls around the Archaean Scotia-Kanowna Dome, Kalgoorlie Terrane, Western Australia  

Authors / CoAuthors

Davis, B. | Blewett, R.S. | Squire, R. | Champion, D.C. | Henson, P.A.

Abstract

Archaean domes are associated with many of the larger gold deposits of the Eastern Goldfields Superterrane (e.g., Sunrise Dam, Wallaby, St Ives camp, Kalgoorlie, Lawlers etc), and the Scotia-Kanowna Dome is eroded to sufficiently deep levels to provide insights into the role domes play in controlling gold deposition. At the centre of the Scotia-Kanowna Dome is a granite-cored batholith, which is surrounded by outward-dipping greenstone belts and associated shear zones. A number of small- to medium-sized gold deposits occur on the limbs and the centre of the dome, and the world-class Kanowna Belle gold mine occurs on the nose of the dome. At least three separate gold mineralising events are defined, each of regional significance that can be correlated with other well known gold deposits of the Eastern Goldfields Superterrane. The architecture of granite-cored domes has played a critical role in focussing magma as well as mineralising fluids into regions of maximum dilation. They do this by nature of their inherent competence, by influencing the position and geometry of shear zones (fluid pathways) and hence distribution of stratigraphy (depositional sites) across the region. The Scotia-Kanowna Dome is a good example to study this control, and inferences can be made for similar controls by concealed domes, such as beneath Kalgoorlie.

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nonGeographicDataset

eCat Id

68828

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Keywords

• External Publication

( Theme )

• 3D model

( Theme )

• mineral deposits

( Theme )

• structural geology

• AU-WA

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_Internal

Publication Date

2009-04-20T00:00:00

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Australian Government Security ClassificationSystem    

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Creative Commons Attribution 4.0 International Licence    

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geoscientificInformation

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[-30.0, -29.0, 122.0, 124.0]

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