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GEOREF RECORD

Pine Point orebodies and their relationship to the stratigraphy, structure, dolomitization, and karstification of the Middle Devonian barrier complex

D. Rhodes, E. A. Lantos, J. A. Lantos, R. J. Webb and D. C. Owens
Pine Point orebodies and their relationship to the stratigraphy, structure, dolomitization, and karstification of the Middle Devonian barrier complex (in A second issue devoted to Canadian mineral deposits, W. J. Wolfe (editor), Alastair J. Sinclair (editor) and D. F. Strong (editor))
Economic Geology and the Bulletin of the Society of Economic Geologists (August 1984) 79 (5): 991-1055

Abstract

Mississippi valley-type ore field on the south side of Great Slave Lake. Pine Point has produced 58.2 million tons of 3.0 percent Pb and 6.7 percent Zn with present reserves of 25.7 million tons of 2.7 percent Pb and 6.3 percent Zn. Most Pine Point orebodies were deposited in interconnected paleokarst networks that developed at the lower limits of coarse dolomite alteration of upper barrier limestones. Karstic structures, which exhibit the largest cavity development and consequently the greatest amounts of infilling internal sediments, host the best grades of mineralization. The following conclusions are suggested: the barrier developed due to subtle epeirogenic crustal movements and/or eustatic sea-level changes affecting normal sedimentary processes; deformation of the barrier is possibly due to differential sediment compaction or warping of underlying evaporites; coarse dolomitization and paleokarstification; metals introduced by chloride-rich brines; brines (expelled by overburden pressures) migrated eastward along the barrier and precipitated metals in paleokarst structures upon encountering reduced sulfur species.--Modified journal abstract.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 79
Serial Issue: 5
Title: Pine Point orebodies and their relationship to the stratigraphy, structure, dolomitization, and karstification of the Middle Devonian barrier complex
Title: A second issue devoted to Canadian mineral deposits
Author(s): Rhodes, D.Lantos, E. A.Lantos, J. A.Webb, R. J.Owens, D. C.
Author(s): Wolfe, W. J.editor
Author(s): Sinclair, Alastair J.editor
Author(s): Strong, D. F.editor
Affiliation: Cominco, Vancouver, BC, Canada
Affiliation: Cominco, Vancouver, BC, Canada
Pages: 991-1055
Published: 198408
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 58
Accession Number: 1984-051762
Categories: Economic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sects., geol. sketch maps
N60°00'00" - N61°30'00", W116°00'00" - W112°00'00"
Secondary Affiliation: Univ. B.C., CAN, CanadaMem. Univ. Newfoundland, CAN, CanadaUniv. Waterloo, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1984
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