Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador
The Archean Nain Province of northern Labrador displays a variable imprint of Early Proterozoic thermotectonism several tens of kilometres east of its collisional boundary (Torngat Orogen) with the Archean Rae (eastern Churchill) Province, the latter extensively reworked by Early Proterozoic events....
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Geological Association of Canada
1990
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/3704 2023-05-15T17:13:59+02:00 Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador Ryan, Bruce 1990-12-12 application/pdf https://journals.lib.unb.ca/index.php/GC/article/view/3704 eng eng Geological Association of Canada https://journals.lib.unb.ca/index.php/GC/article/view/3704/4218 https://journals.lib.unb.ca/index.php/GC/article/view/3704 Copyright (c) 2015 Geoscience Canada Geoscience Canada; Volume 17, Number 4 (1990) 1911-4850 0315-0941 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1990 ftuninewbrunojs 2022-07-11T11:47:45Z The Archean Nain Province of northern Labrador displays a variable imprint of Early Proterozoic thermotectonism several tens of kilometres east of its collisional boundary (Torngat Orogen) with the Archean Rae (eastern Churchill) Province, the latter extensively reworked by Early Proterozoic events. This imprint is discerned by the west-ward increase in metamorphic grade in the Early Proterozoic Domes diabase dykes and from the degree of retrogression of Archean granulite-facies gneisses. Early Proterozoic tectonic effects also include the translation of Raman Group cover rocks over their Archean basement, and the subsequent folding of both the basement décollement and the cover. Later steep reverse faults dissect the boundary zone between the Rae (Churchill) Province and the Archean foreland. All these features are believed to be related to Early Proterozoic oblique continental collision between two Archean crustal blocks. Article in Journal/Newspaper Nain University of New Brunswick: Centre for Digital Scholarship Journals Nain ENVELOPE(-61.695,-61.695,56.542,56.542) Hebron ENVELOPE(-62.631,-62.631,58.200,58.200) |
institution |
Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
The Archean Nain Province of northern Labrador displays a variable imprint of Early Proterozoic thermotectonism several tens of kilometres east of its collisional boundary (Torngat Orogen) with the Archean Rae (eastern Churchill) Province, the latter extensively reworked by Early Proterozoic events. This imprint is discerned by the west-ward increase in metamorphic grade in the Early Proterozoic Domes diabase dykes and from the degree of retrogression of Archean granulite-facies gneisses. Early Proterozoic tectonic effects also include the translation of Raman Group cover rocks over their Archean basement, and the subsequent folding of both the basement décollement and the cover. Later steep reverse faults dissect the boundary zone between the Rae (Churchill) Province and the Archean foreland. All these features are believed to be related to Early Proterozoic oblique continental collision between two Archean crustal blocks. |
format |
Article in Journal/Newspaper |
author |
Ryan, Bruce |
spellingShingle |
Ryan, Bruce Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
author_facet |
Ryan, Bruce |
author_sort |
Ryan, Bruce |
title |
Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
title_short |
Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
title_full |
Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
title_fullStr |
Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
title_full_unstemmed |
Basement-cover relationships and metamorphic patterns in the foreland of the Torngat Orogen in the Saglek-Hebron area, Labrador |
title_sort |
basement-cover relationships and metamorphic patterns in the foreland of the torngat orogen in the saglek-hebron area, labrador |
publisher |
Geological Association of Canada |
publishDate |
1990 |
url |
https://journals.lib.unb.ca/index.php/GC/article/view/3704 |
long_lat |
ENVELOPE(-61.695,-61.695,56.542,56.542) ENVELOPE(-62.631,-62.631,58.200,58.200) |
geographic |
Nain Hebron |
geographic_facet |
Nain Hebron |
genre |
Nain |
genre_facet |
Nain |
op_source |
Geoscience Canada; Volume 17, Number 4 (1990) 1911-4850 0315-0941 |
op_relation |
https://journals.lib.unb.ca/index.php/GC/article/view/3704/4218 https://journals.lib.unb.ca/index.php/GC/article/view/3704 |
op_rights |
Copyright (c) 2015 Geoscience Canada |
_version_ |
1766071222705061888 |