Geology of the T ribag Mine

CIM Bulletin, 1965

Matthew Blecha Tribag Mining Co. Ltd., Batchawana Bay, Ontario

The Tribag copper deposit is one of the rare examples of mineralized breccias in the Canadian Shield. The breccia is a pipe-like body, and consists of granitic, diabasic and volcanic fragments embedded in a vuggy, quartz-carbonate matrix. The mineralization is essentially chalcopyrite and pyrite, with minor molybdenite, sphalerite, galena and other sulphides. The main ore zone is saddle-like in shape, and is enveloped in a zone of chloritization, sericitization and claymineral alteration. It is suggested that the breccia is of the diatreme type.
Keywords: Alteration, Breccias, Breton breccia, chalcopyrite, diabase, granitic, molybdenite, mining, Rock, Rocks, sulphide, Sulphides