The geology and geochronology of the Makkovik Bay area, Labrador
The sedimentary and volcanic formations of the Aillik series in the Makkovik Bay area of the Labrador coast are about 25 000 ft (~7620 m) in thickness. They have been folded into a series of northerly-trending folds and are intruded by gabbro, diorite, syenite, and abundant granite. Potassium–argon...
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crcansciencepubl:10.1139/e69-107 2023-12-17T10:33:17+01:00 The geology and geochronology of the Makkovik Bay area, Labrador Gandhi, S. S. Grasty, R. L. Grieve, R. A. F. 1969 http://dx.doi.org/10.1139/e69-107 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-107 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 6, issue 5, page 1019-1035 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1969 crcansciencepubl https://doi.org/10.1139/e69-107 2023-11-19T13:39:06Z The sedimentary and volcanic formations of the Aillik series in the Makkovik Bay area of the Labrador coast are about 25 000 ft (~7620 m) in thickness. They have been folded into a series of northerly-trending folds and are intruded by gabbro, diorite, syenite, and abundant granite. Potassium–argon age determinations range from 1730 to 1830 million years for two gneisses, and from 1500 to 1600 million years for the metamorphosed sedimentary and volcanic rocks and intrusive granite-gneiss and granite. The structural features of the area indicate a single cycle of orogenic deformation for the sedimentary and volcanic rocks, in which the emplacement of synkinematic granite gneiss as domes and other bodies played an important role. One of the gneisses is considered a part of the migmatized Archean basement on which the Aillik series was laid down, and was subsequently involved in the Hudsonian orogenic cycle about 1600 million years ago. The area lies to the northwest of the Grenville Front, and has been intruded by diabase dikes corresponding in age to the Grenville orogeny, and by lamprophyre dikes of Cambrian age. Article in Journal/Newspaper Makkovik Canadian Science Publishing (via Crossref) Makkovik ENVELOPE(-59.178,-59.178,55.087,55.087) Canadian Journal of Earth Sciences 6 5 1019 1035 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Gandhi, S. S. Grasty, R. L. Grieve, R. A. F. The geology and geochronology of the Makkovik Bay area, Labrador |
topic_facet |
General Earth and Planetary Sciences |
description |
The sedimentary and volcanic formations of the Aillik series in the Makkovik Bay area of the Labrador coast are about 25 000 ft (~7620 m) in thickness. They have been folded into a series of northerly-trending folds and are intruded by gabbro, diorite, syenite, and abundant granite. Potassium–argon age determinations range from 1730 to 1830 million years for two gneisses, and from 1500 to 1600 million years for the metamorphosed sedimentary and volcanic rocks and intrusive granite-gneiss and granite. The structural features of the area indicate a single cycle of orogenic deformation for the sedimentary and volcanic rocks, in which the emplacement of synkinematic granite gneiss as domes and other bodies played an important role. One of the gneisses is considered a part of the migmatized Archean basement on which the Aillik series was laid down, and was subsequently involved in the Hudsonian orogenic cycle about 1600 million years ago. The area lies to the northwest of the Grenville Front, and has been intruded by diabase dikes corresponding in age to the Grenville orogeny, and by lamprophyre dikes of Cambrian age. |
format |
Article in Journal/Newspaper |
author |
Gandhi, S. S. Grasty, R. L. Grieve, R. A. F. |
author_facet |
Gandhi, S. S. Grasty, R. L. Grieve, R. A. F. |
author_sort |
Gandhi, S. S. |
title |
The geology and geochronology of the Makkovik Bay area, Labrador |
title_short |
The geology and geochronology of the Makkovik Bay area, Labrador |
title_full |
The geology and geochronology of the Makkovik Bay area, Labrador |
title_fullStr |
The geology and geochronology of the Makkovik Bay area, Labrador |
title_full_unstemmed |
The geology and geochronology of the Makkovik Bay area, Labrador |
title_sort |
geology and geochronology of the makkovik bay area, labrador |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/e69-107 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-107 |
long_lat |
ENVELOPE(-59.178,-59.178,55.087,55.087) |
geographic |
Makkovik |
geographic_facet |
Makkovik |
genre |
Makkovik |
genre_facet |
Makkovik |
op_source |
Canadian Journal of Earth Sciences volume 6, issue 5, page 1019-1035 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e69-107 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
6 |
container_issue |
5 |
container_start_page |
1019 |
op_container_end_page |
1035 |
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1785587231075860480 |