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Economic Mineral Deposits In Precambrian Basement Complex

One of these near Lake St Martin Manitoba LSMS Fig 51 brings Precambrian basement to the surface in an arcuate pattern Manitoba Mineral Resources Division 1979 Shocked granite at this site with a 2387 Ma KAr biotite age is inferred to be part of a meteorite impact ring structure McCabe and Bannatyne 1970.

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