A Revision of Precambrian Structural Provinces in Northeastern Quebec and Northern Labrador
Recent mapping in northeastern Quebec and northern Labrador has shown no structural discontinuity between areas forming parts of the Churchill and Nain structural provinces. Structural trends and geological map-units pass directly from the Churchill province into the area known as Western Nain sub-p...
| Published in: | Canadian Journal of Earth Sciences |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1971
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/e71-059 http://www.nrcresearchpress.com/doi/pdf/10.1139/e71-059 |
| Summary: | Recent mapping in northeastern Quebec and northern Labrador has shown no structural discontinuity between areas forming parts of the Churchill and Nain structural provinces. Structural trends and geological map-units pass directly from the Churchill province into the area known as Western Nain sub-province. Only one period of folding and metamorphism has been recognized in both areas. Therefore, the concept of the Western Nain sub-province is refuted.The area previously known as Eastern Nain sub-province forms a discrete structural and geological unit and therefore is considered to form a structural province renamed Nain. A more southerly location of the Grenville Front adds approximately 3500 sq. miles (9060 sq. km) to the redefined Nain province. This wedge-shaped area, lying north of the Grenville Front, shows northeasterly to easterly trends as opposed to northerly trends in most of the redefined Nain province. This structural discordance indicates a new sub-province, the Mak-kovik, immediately north of the Grenville Front. |
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