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GEOREF RECORD

Re-Os pyrite geochronology of the yellowhead-type mineralization, Pend Oreille Mine, Kootenay Arc, Metaline District, Washington

Suzanne Paradis, Danny Hnatyshin, George J. Simandl and Robert A. Creaser
Re-Os pyrite geochronology of the yellowhead-type mineralization, Pend Oreille Mine, Kootenay Arc, Metaline District, Washington
Economic Geology and the Bulletin of the Society of Economic Geologists (June 2020) 115 (7): 1373-1384

Abstract

Pend Oreille, a carbonate-hosted Zn-Pb sulfide deposit, is the only base metal mine recently in production within the historically prolific Kootenay arc belt. The deposit consists of two spatially and lithologically distinct types of stratabound, carbonate-hosted Zn-Pb mineralization: Josephine and Yellowhead. The yellowhead-type sulfide mineralization, the focus of this study, consists of en echelon tabular to lensoidal pyrite-sphalerite-rich orebodies hosted by the Middle Cambrian to Early Ordovician Metaline Formation. The yellowhead-type mineralization is characterized by carbonate replacement and open-space filling textures, indicating diagenetic and epigenetic origin. As with most low-temperature deposits not directly associated with igneous activity, the timing of sulfide mineralization has traditionally been difficult to constrain using radiometric methods. In this study, we present a new Re-Os age of 512 + or - 17 Ma from the Yellowhead mineralization. Combining this age date with the Cambrian-Ordovician fossil record of the host Metaline Formation and detailed textural analysis of the mineralization, we conclude that the Yellowhead sulfide mineralization is largely diagenetic in origin. Such an origin for the Yellowhead mineralization is similar to that of irish-type deposits worldwide. For explorationists, the presence of irish-type deposits in the United States portion of the Kootenay Arc opens the possibility of discovering similar mineralization in the Canadian extension of the Kootenay Arc.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 115
Serial Issue: 7
Title: Re-Os pyrite geochronology of the yellowhead-type mineralization, Pend Oreille Mine, Kootenay Arc, Metaline District, Washington
Affiliation: Geological Survey of Canada, Sidney, BC, Canada
Pages: 1373-1384
Published: 20200624
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 70
Accession Number: 2020-070645
Categories: Economic geology, geology of ore depositsGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sect., sketch map
N49°00'00" - N52°00'00", W120°00'00" - W114°00'00"
Secondary Affiliation: University of Alberta, CAN, CanadaBritish Columbia Geological Survey, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202043
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