A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia
A tonalite dyke in the Benacadie Brook Formation in the Boisdale Hills of central Cape Breton Island yielded a U-Pb (zircon) age of 564.5 ± 5.1 Ma, interpreted to be the age of intrusion. The age is identical within error to the U-Pb (zircon) age of 564 +3/-2 Ma previously reported for a granodiorit...
Published in: | Atlantic Geology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Atlantic Geoscience Society
1999
|
Subjects: | |
Online Access: | https://journals.lib.unb.ca/index.php/ag/article/view/2033 |
id |
ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/2033 |
---|---|
record_format |
openpolar |
spelling |
ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/2033 2023-05-15T15:46:42+02:00 A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia Barr, Sandra M. Kamo, Sandra White, Chris E. 1999-10-01 application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/2033 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/2033/2397 https://journals.lib.unb.ca/index.php/ag/article/view/2033 Copyright (c) 2015 Atlantic Geology Atlantic Geoscience; Vol. 35 No. 3 (1999) 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1999 ftuninewbrunojs 2022-07-11T11:41:49Z A tonalite dyke in the Benacadie Brook Formation in the Boisdale Hills of central Cape Breton Island yielded a U-Pb (zircon) age of 564.5 ± 5.1 Ma, interpreted to be the age of intrusion. The age is identical within error to the U-Pb (zircon) age of 564 +3/-2 Ma previously reported for a granodiorite sample from the nearby Shunacadie Pluton. Based on geographic proximity and identical age, as well as petrological similarities, the tonalite dyke is interpreted to be comagmatic with the granodiorite. Although the new date does not provide further constraint on the age of the Benacadie Brook Formation, it affirms the importance of ca. 560 Ma plutonism in the Bras d'Or terrene of Cape Breton Island. RÉSUMÉ Un dyke de tonalite intrusive dans la formation de Benacadie Brook, dans les collines du centre de l’ile du Cap-Breton, a révèlé une datation au U-Pb (au zircon) de 564.5 ± 5.1 m.a. Cette datation est la même que celle obtenue au U-Pb (au zircon) de 564 +3/-2 m.a. signalee précéiemment pour un echantillon de granodiorite de la formation plutonique adjacente de Shunacadie. Compte tenu de la proximité g&jgraphique, du même âge et d'autres similitudes pétrologiques, ce dyke de tonalite est repute appartenir a la mfime province petrographique que la granodiorite. Bien que cette nouvelle datation ne donne pas d'autres précisions sur l’âge de la formation de Benacadie Brook, elle n'en établit pas moins I'importance de l'activité plutonique survenue dans le terrene du Bras d'Or sur l’ile du Cap-Breton il y a environ 560 m.a. Traduit par la rédaction Article in Journal/Newspaper Breton Island University of New Brunswick: Centre for Digital Scholarship Journals Breton Island ENVELOPE(141.383,141.383,-66.800,-66.800) Atlantic Geology 35 3 |
institution |
Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
A tonalite dyke in the Benacadie Brook Formation in the Boisdale Hills of central Cape Breton Island yielded a U-Pb (zircon) age of 564.5 ± 5.1 Ma, interpreted to be the age of intrusion. The age is identical within error to the U-Pb (zircon) age of 564 +3/-2 Ma previously reported for a granodiorite sample from the nearby Shunacadie Pluton. Based on geographic proximity and identical age, as well as petrological similarities, the tonalite dyke is interpreted to be comagmatic with the granodiorite. Although the new date does not provide further constraint on the age of the Benacadie Brook Formation, it affirms the importance of ca. 560 Ma plutonism in the Bras d'Or terrene of Cape Breton Island. RÉSUMÉ Un dyke de tonalite intrusive dans la formation de Benacadie Brook, dans les collines du centre de l’ile du Cap-Breton, a révèlé une datation au U-Pb (au zircon) de 564.5 ± 5.1 m.a. Cette datation est la même que celle obtenue au U-Pb (au zircon) de 564 +3/-2 m.a. signalee précéiemment pour un echantillon de granodiorite de la formation plutonique adjacente de Shunacadie. Compte tenu de la proximité g&jgraphique, du même âge et d'autres similitudes pétrologiques, ce dyke de tonalite est repute appartenir a la mfime province petrographique que la granodiorite. Bien que cette nouvelle datation ne donne pas d'autres précisions sur l’âge de la formation de Benacadie Brook, elle n'en établit pas moins I'importance de l'activité plutonique survenue dans le terrene du Bras d'Or sur l’ile du Cap-Breton il y a environ 560 m.a. Traduit par la rédaction |
format |
Article in Journal/Newspaper |
author |
Barr, Sandra M. Kamo, Sandra White, Chris E. |
spellingShingle |
Barr, Sandra M. Kamo, Sandra White, Chris E. A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
author_facet |
Barr, Sandra M. Kamo, Sandra White, Chris E. |
author_sort |
Barr, Sandra M. |
title |
A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
title_short |
A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
title_full |
A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
title_fullStr |
A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
title_full_unstemmed |
A Late Neoproterozoic age for a tonalite dyke in the Boisdale Hills, Cape Breton Island, Nova Scotia |
title_sort |
late neoproterozoic age for a tonalite dyke in the boisdale hills, cape breton island, nova scotia |
publisher |
Atlantic Geoscience Society |
publishDate |
1999 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/2033 |
long_lat |
ENVELOPE(141.383,141.383,-66.800,-66.800) |
geographic |
Breton Island |
geographic_facet |
Breton Island |
genre |
Breton Island |
genre_facet |
Breton Island |
op_source |
Atlantic Geoscience; Vol. 35 No. 3 (1999) 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/2033/2397 https://journals.lib.unb.ca/index.php/ag/article/view/2033 |
op_rights |
Copyright (c) 2015 Atlantic Geology |
container_title |
Atlantic Geology |
container_volume |
35 |
container_issue |
3 |
_version_ |
1766381397015003136 |