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
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 s...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Geological Association of Canada
1990
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| Subjects: | |
| Online Access: | https://journals.lib.unb.ca/index.php/GC/article/view/3706 |
| 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 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. |
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