Volume 17, Number 4 (1990)
Articles

Structural evolution of the Hudsonian Torngat Orogen in the North River map area, Labrador: Evidence for east-west transpressive collision of Nain and Rae continental blocks

Martin J. Van Kranendonk
Department of Geological Sciences, Queen's University, Kingston, Ontario.
Ingo Ermanovics
Geological Survey of Canada, Ottawa, Ontario.
Published December 12, 1990
How to Cite
Van Kranendonk, M. J., & Ermanovics, I. (1990). Structural evolution of the Hudsonian Torngat Orogen in the North River map area, Labrador: Evidence for east-west transpressive collision of Nain and Rae continental blocks. Geoscience Canada, 17(4). Retrieved from https://journals.lib.unb.ca/index.php/GC/article/view/3706

Abstract

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 lineation during sinistral transpression; and (3) E-directed thrusting during uplift of the orogen. These structures are interpreted as progressive features that resulted from E-W oblique collision of the Archean Nain and Rae continental blocks across a 160°-striking boundary.