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A fluid inclusion study of quartzite-hosted lode gold mineralization at Athabasca Pass, Central Rocky Mountains, Canada

Robert P. Shaw and Roger D. Morton
A fluid inclusion study of quartzite-hosted lode gold mineralization at Athabasca Pass, Central Rocky Mountains, Canada
Economic Geology and the Bulletin of the Society of Economic Geologists (December 1990) 85 (8): 1881-1893

Abstract

Fluid inclusions in quartz coeval with native gold in recently discovered auriferous veins in the Athabasca Pass sector of the main ranges of the central Canadian Rocky Mountains have yielded clues to the possible origins of these new mineral occurrences. Gold-bearing veins are hosted by a dominantly siliceous sequence of low-grade quartzites + or - conglomerates and pelites belonging to the Lower Cambrian Gog Group.Microthermometric data indicate that an aqueous fluid of relatively constant composition, containing 2 to 10 equiv wt percent NaCl and up to 11 mole percent CO (sub 2) (+ or -CH (sub 4) , N (sub 2) ), accompanied gold mineralization at between 295 degrees and 330 degrees + or - 20 degrees C and at pressures of > or =900 bars. These data, augmented by earlier geologic and geochemical information, evoke a classification of the Athabasca Pass lodes into the mesothermal, turbidite-hosted class. However the dominantly mature, siliceous clastic host rocks at Athabasca Pass illustrate the potentials of quartzite-dominated domains as potential exploration targets in the search for future mesothermal lode gold systems.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 85
Serial Issue: 8
Title: A fluid inclusion study of quartzite-hosted lode gold mineralization at Athabasca Pass, Central Rocky Mountains, Canada
Affiliation: Univ. Alberta, Dep. Geol., Edmonton, AB, Canada
Pages: 1881-1893
Published: 199012
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 65
Accession Number: 1991-001711
Categories: Economic geology, geology of ore depositsIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch map
N49°00'00" - N60°00'00", W120°00'00" - W110°00'00"
N48°25'00" - N60°00'00", W139°00'00" - W114°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists
Update Code: 1991
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