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Pb and S isotopic composition of indicator minerals in glacial sediments from NW Alberta, Canada; implications for Zn-Pb base metal exploration

R. C. Paulen, S. Paradis, A. Plouffe and I. R. Smith
Pb and S isotopic composition of indicator minerals in glacial sediments from NW Alberta, Canada; implications for Zn-Pb base metal exploration (in Indicator mineral special issue, B. McClenaghan (prefacer) and G. Hall (prefacer))
Geochemistry - Exploration, Environment, Analysis (November 2011) 11 (4): 309-320

Abstract

Results from an indicator mineral survey conducted with till samples in NW Alberta were used to identify a glacial dispersal train of sand-sized sphalerite and minor galena. High concentrations of dark gray to black, angular, brittle grains of sphalerite were found (100 to >1000 grains) in nine of ninety 30 kg till samples. The presence of high sphalerite grain counts in nine samples situated within a geographically restricted area argues against long-distance glacial transport, comminution, and deposition of erratic material from the carbonate-hosted Pine Point Zn-Pb deposits, located 330 km to the NE. The Pb isotopic composition of the galena grains recovered from till is similar to values obtained from mississippi valley-type deposits in the northern Canadian Cordillera and Pine Point and indicates that the galena is derived from similar basement sources situated along the Great Slave Lake shear zone. Sphalerite grains from the till have a sulphur isotopic composition significantly different from mississippi valley-type deposits in the northern and southern Cordillera, and are significantly different than the Pine Point Deposits. These results highlight the potential to discover base metal mineralization hosted within the Cretaceous shale bedrock of northern Alberta.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 11
Serial Issue: 4
Title: Pb and S isotopic composition of indicator minerals in glacial sediments from NW Alberta, Canada; implications for Zn-Pb base metal exploration
Title: Indicator mineral special issue
Author(s): Paulen, R. C.Paradis, S.Plouffe, A.Smith, I. R.
Author(s): McClenaghan, B.prefacer
Author(s): Hall, G.prefacer
Affiliation: Alberta Geological Survey, Edmonton, AB, Canada
Pages: 309-320
Published: 201111
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
References: 69
Accession Number: 2012-010053
Categories: Isotope geochemistryEconomic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch maps
N58°00'00" - N59°00'00", W120°00'00" - W119°00'00"
Secondary Affiliation: Geological Survey of Canada, CAN, Canada
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201205
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