Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador
Results of Rb–Sr isotopic and chemical analyses from five bodies of granite and from one body of granitic gneiss cropping out along the coast of Labrador between Nain and the Khaumayät (Kaumajet) Mountains are reported. These indicate that: (1) the Okhakh, Nänukhtut, and Saddle Island Granites were...
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Canadian Science Publishing
1977
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Online Access: | http://dx.doi.org/10.1139/e77-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-139 |
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crcansciencepubl:10.1139/e77-139 2023-12-17T10:33:32+01:00 Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador Barton Jr., Jackson M. 1977 http://dx.doi.org/10.1139/e77-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-139 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 14, issue 7, page 1635-1645 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1977 crcansciencepubl https://doi.org/10.1139/e77-139 2023-11-19T13:39:12Z Results of Rb–Sr isotopic and chemical analyses from five bodies of granite and from one body of granitic gneiss cropping out along the coast of Labrador between Nain and the Khaumayät (Kaumajet) Mountains are reported. These indicate that: (1) the Okhakh, Nänukhtut, and Saddle Island Granites were intruded between ~2400 Ma ago and ~2300 Ma ago, contemporaneously with the extrusion of volcanic rocks within the Mugford Group; (2) the Loon Granite was emplaced ~1576 Ma ago; and (3) the Operngeviksoakh and Manvers Granites crystallized ~1376 Ma ago and ~ 1280 Ma ago respectively, contemporaneously with the final stages of emplacement of the Nain Complex. These granites are characterized by large initial 87 Sr/ 86 Sr ratios, suggesting that they are of predominantly crystal origin. All of these granite bodies were emplaced post-tectonically and did not accompany any regional deformation or metamorphism. Article in Journal/Newspaper Nain Saddle Island Canadian Science Publishing (via Crossref) Nain ENVELOPE(-61.695,-61.695,56.542,56.542) Kaumajet Mountains ENVELOPE(-61.848,-61.848,57.800,57.800) Saddle Island ENVELOPE(68.711,68.711,-49.348,-49.348) Canadian Journal of Earth Sciences 14 7 1635 1645 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Barton Jr., Jackson M. Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
topic_facet |
General Earth and Planetary Sciences |
description |
Results of Rb–Sr isotopic and chemical analyses from five bodies of granite and from one body of granitic gneiss cropping out along the coast of Labrador between Nain and the Khaumayät (Kaumajet) Mountains are reported. These indicate that: (1) the Okhakh, Nänukhtut, and Saddle Island Granites were intruded between ~2400 Ma ago and ~2300 Ma ago, contemporaneously with the extrusion of volcanic rocks within the Mugford Group; (2) the Loon Granite was emplaced ~1576 Ma ago; and (3) the Operngeviksoakh and Manvers Granites crystallized ~1376 Ma ago and ~ 1280 Ma ago respectively, contemporaneously with the final stages of emplacement of the Nain Complex. These granites are characterized by large initial 87 Sr/ 86 Sr ratios, suggesting that they are of predominantly crystal origin. All of these granite bodies were emplaced post-tectonically and did not accompany any regional deformation or metamorphism. |
format |
Article in Journal/Newspaper |
author |
Barton Jr., Jackson M. |
author_facet |
Barton Jr., Jackson M. |
author_sort |
Barton Jr., Jackson M. |
title |
Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
title_short |
Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
title_full |
Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
title_fullStr |
Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
title_full_unstemmed |
Rb–Sr ages and tectonic setting of some granite intrusions, coastal Labrador |
title_sort |
rb–sr ages and tectonic setting of some granite intrusions, coastal labrador |
publisher |
Canadian Science Publishing |
publishDate |
1977 |
url |
http://dx.doi.org/10.1139/e77-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-139 |
long_lat |
ENVELOPE(-61.695,-61.695,56.542,56.542) ENVELOPE(-61.848,-61.848,57.800,57.800) ENVELOPE(68.711,68.711,-49.348,-49.348) |
geographic |
Nain Kaumajet Mountains Saddle Island |
geographic_facet |
Nain Kaumajet Mountains Saddle Island |
genre |
Nain Saddle Island |
genre_facet |
Nain Saddle Island |
op_source |
Canadian Journal of Earth Sciences volume 14, issue 7, page 1635-1645 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e77-139 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
14 |
container_issue |
7 |
container_start_page |
1635 |
op_container_end_page |
1645 |
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1785587625908764672 |