Principal Types of Iron-Formation and Derived Ores

CIM Bulletin, 1966

G. A. Gross Economic Geology Division, Geological Survey of Canada, Ottawa, Ont.

Nearly 90 per cent of the iron ore produced in Canada is derived from iron-formation or bedded iron deposits. About 70 per cent of this consists of concentrates obtained from iron-formation; another 20 per cent was formed by natural enrichment processes. Four principal varieties of iron-formation are recognized -the Algoma, Superior, Clinton and Minette types. Differences in their geology, mineralogy, chemical composition and environment of deposition are of special significance in their evaluation as ore.
Keywords: Arctic Canada, Iron Formations, Michipicoten Area, sedimentary facies, siderite, Canada, Environment, facies, formation, Iron, Ore, Ores, Rock, Rocks