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Mass transfer during gold precipitation within a vertically extensive vein network (Sigma Deposit, Abitibi greenstone belt, Canada); Part I, Patterns of hydrothermal alteration haloes

Paolo S. Garofalo
Mass transfer during gold precipitation within a vertically extensive vein network (Sigma Deposit, Abitibi greenstone belt, Canada); Part I, Patterns of hydrothermal alteration haloes
European Journal of Mineralogy (October 2004) 16 (5): 753-760

Abstract

The Sigma deposit is a large network of Au-mineralized veins that cut a sequence of andesitic volcanic rocks and volcaniclastics intruded by porphyritic diorite and feldspar porphyry dykes in the Archaean Abitibi greenstone belt. Hydrothermal alteration around these veins consists of coeval albite-rich and tourmaline-rich haloes, and occurred during multiple stages of shearing, opening and interconnection of vein segments, and during gold precipitation within veins and wall rocks. Quantitative geometrical data for the vein network and alteration haloes show that the alteration haloes have no preferential distribution within the deposit. Results suggest that the hydrothermal alteration at Sigma developed mainly from diffusive transport of mass through the wall rocks


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 16
Serial Issue: 5
Title: Mass transfer during gold precipitation within a vertically extensive vein network (Sigma Deposit, Abitibi greenstone belt, Canada); Part I, Patterns of hydrothermal alteration haloes
Author(s): Garofalo, Paolo S.
Affiliation: ETH Zurich, Eidgenoessiche Technische Hochschule, Zurich, Switzerland
Pages: 753-760
Published: 200410
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 34
Accession Number: 2004-084038
Categories: Economic geology, geology of ore depositsIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N46°00'00" - N50°30'00", W85°00'00" - W73°49'60"
N48°07'00" - N48°07'00", W77°46'60" - W77°46'60"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200424
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