Proterozoic transcurrent movements along the Kapuskasing lineament (Superior Province, Canada) and their relationship to surrounding structures

Mathematics – Logic

Scientific paper

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Scientific paper

Analysis of large-scale geological and geophysical lineaments provide evidence for a new model to explain the Kapuskasing Structural Zone (KSZ) and James Bay. James Bay is interpreted to have formed due to rifting related to lateral strike-slip along the KSZ. The Sutton Arc is interpreted to be an extension from Hudson Bay Arc, which has been displaced by rifting of James Bay. Magnetic anomalies which terminate at the KSZ on the west have correlated magnetic anomalies on the east which are displaced left-laterally. It is proposed that these displacements and the rifting of James Bay and the strike-slip along the KSZ were caused as a result of 160 km of left-lateral motion between East and West Superior Terranes with an accompanying 5° of anticlockwise rotation of the West Superior Terrane. Additional support for this model comes from structural evidence drawn from previous reports from the last twenty-six years.

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