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Predictive Distribution of Fault-Fill and Extensional Veins: Example from the Sigma Gold Mine, Abitibi Subprovince, Canada

Damien Gaboury^,*

Université du Québec à Chicoutimi, Consortium de Recherche en Exploration Minérale (CONSOREM), 555 boul. de I’Université, Chicoutimi, Québec, Canada G7H 2B1

Alain Carrier^*, Michel Crevier and Carl Pelletier

McWatters Mining Inc., C.P. 9000, Val d’Or, Quebec, Canada J9P 6A5

Dale A. Sketchley

Acuity Management Ltd, 15068 Spenser Court, Surrey, British Columbia, Canada V3S 5Z8

Corresponding author: email, dgaboury{at}uqac.ca

This paper presents the results of a geometric and structural study aimed at developing a predictive model to account for the distribution of gold-bearing veins at the Sigma gold deposit, Abitibi subprovince, Canada. Results indicate that third-order shear zones define a well-organized system comprising two sets of parallel-striking, moderately to steeply south-dipping curviplanar structures intersecting at constant 15° to 25° angles. Fault-fill veins are better developed within the curved segments of the shear zones that represent large zones of enhanced permeability. Most extensional veins were formed later as tension gashes, mainly distributed along conjugate corridors of low reverse faults, typical of Andersonian-type faulting.

This article has been cited by other articles:

				G. R. Olivo, F. Chang, and T. K. Kyser Formation of the Auriferous and Barren North Dipper Veins in the Sigma Mine, Val d'Or, Canada: Constraints from Structural, Mineralogical, Fluid Inclusion, and Isotopic Data Economic Geology, May 1, 2006; 101(3): 607 - 631. [Abstract] [Full Text] [PDF]