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Vein mineralization at the Damang Gold Mine, Ghana: controls on mineralization

Citation

Tunks, AJ and Selley, D and Rogers, JR and Brabham, G, Vein mineralization at the Damang Gold Mine, Ghana: controls on mineralization, Journal of Structural Geology, 26, (6-7) pp. 1257-1273. ISSN 0191-8141 (2004) [Refereed Article]

DOI: doi:10.1016/j.jsg.2003.11.005

Abstract

Two distinct styles of Au mineralization occur at the Damang Gold Mine; Palaeoproterozoic sediments of the Tarkwaian Group host both. One style of mineralization is stratabound within quartz-lithic conglomerates of the Banket Series. The second style of mineralization is associated with an extensive low-displacement, fault-fracture mesh that formed in a compressional stress regime late in the deformational history and after the peak metamorphism. Regional deformation within the Tarkwaian involved initial NW-SE directed shortening (D 1). A major NNE-trending F 1 anticline hosts the Damang orebody. Broadly N-S shortening during D 2 resulted in the formation of E-W-trending thrusts with small displacements. The D 3 shortening direction was similar to that of D 1. Steep D 1 faults were reactivated and a new set of low angle thrusts and associated flat-lying extension veins were formed. The bulk of the mineralization observed at Damang is associated with the low displacement D 3 fault fracture mesh. The presence of flat-lying extensional veins and the reactivation of some misoriented D 1 structures is indicative of periodic episodes of supralithostatic fluid pressures, low differential stress and fault-valve behavior towards the end of the deformation history. © 2004 Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Structural Geology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Mineral Exploration
Objective Field:Precious (Noble) Metal Ore Exploration
Author:Tunks, AJ (Dr Andrew Tunks)
Author:Selley, D (Dr David Selley)
ID Code:32675
Year Published:2004
Web of Science® Times Cited:30
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2004-08-01
Last Modified:2005-06-01
Downloads:0

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