Geology and isotope geochemistry of the Beaver-Temiskaming Silver Mine, Cobalt, Ontario

Creator: 

Goodz, Morrie David

Date: 

1985

Abstract: 

Silver veins at the Beaver-Temiskaming mine are economic in Archean mafic volcanic and intercalated base-metal sulphide-rich sedimentary rocks, but uneconomic in the Proterozoic Nipissing diabase sill. Textural and isotopic evidence indicate a paragenetic succession of silicates, arsenides-sulpharsenides, silver-sulphosalts-sulphides, and carbonates. Metal zoning in the As-bearing minerals is Ni-Co-Fe. Depositional temperatures were about 210-240°C (oxygen isotopes in silicates), 211-258°C (arsenopyrite composition) and 130-227°C (coexisting sulphides). Carbonate isotopic data were reset by meteoric water. Connate waters, interpreted from fluid inclusion data, equilibrated with Archean sulphide-rich interflow units and overlying Proterozoic detritus (Pb isotopic data) and then deposited these elements in veins after the diabase had cooled sufficiently to fracture.

Subject: 

Beaver Temiskaming Silver Mine (Ont.)
Isotope Geology -- Ontario -- Cobalt Region

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Science: 
M.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Geology

Parent Collection: 

Theses and Dissertations

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