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.

Publié-e 1990-12-12

Comment citer

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). Consulté à l’adresse https://journals.lib.unb.ca/index.php/GC/article/view/3706

Résumé

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.