Abstracts
Summary
The Hudsonian Torngat Orogen In the North River map area, Labrador, evolved through: (1) early thrusting and associated isoclinal folding in lower Proterozoic supra crustal cover rocks, and the development of a regional tectonic fabric at peak metamorphic grade; (2) folding and intense shearing on subvertical planes, characterized by a sub-horizontal NNW-plunging extension llneation during sinistral transpression; and (3)Å-directed thrusting during uplift of the orogen. These structures are Interpreted as progressive features that resulted from E-Woblique collision of the Archean Nain and Rae continental blocks across a 160°-striking boundary.
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