The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean
Recently gathered stratigraphic and U–Pb geochronological data indicate that the pre-Triassic rocks of the Grand Manan Terrane on the eastern side of Grand Manan Island can be divided into: (1) Middle Neoproterozoic (late Cryogenian) quartzose and carbonate sedimentary sequences (The Thoroughfare an...
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Geological Association of Canada
2014
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ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/21442 2023-05-15T18:07:24+02:00 The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean Fyffe, Leslie R. 2014-12-03 application/pdf https://journals.lib.unb.ca/index.php/GC/article/view/21442 eng eng Geological Association of Canada https://journals.lib.unb.ca/index.php/GC/article/view/21442/25988 https://journals.lib.unb.ca/index.php/GC/article/view/21442 Copyright (c) 2015 Geoscience Canada Geoscience Canada; Volume 41, Number 4 (2014); 483-502 1911-4850 0315-0941 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftuninewbrunojs 2022-07-11T11:48:31Z Recently gathered stratigraphic and U–Pb geochronological data indicate that the pre-Triassic rocks of the Grand Manan Terrane on the eastern side of Grand Manan Island can be divided into: (1) Middle Neoproterozoic (late Cryogenian) quartzose and carbonate sedimentary sequences (The Thoroughfare and Kent Island formations); (2) a Late Neoproterozoic (early Ediacaran) volcanic-arc sequence (Ingalls Head Formation); and (3) Late Neoproterozioc (mid- Ediacaran) to earliest Cambrian (early Terreneuvian) sedimentary and volcanic-arc sequences (Great Duck Island, Flagg Cove, Ross Island, North Head, Priest Cove, and Long Pond Bay formations). A comparison to Precambrian terranes on the New Brunswick mainland (Brookville and New River terranes) and in adjacent Maine (Islesboro Terrane) suggests that the sedimentary and volcanic sequences of the Grand Manan Terrane were deposited on the continental margin of a Precambrian ocean basin that opened during the breakup of Rodinia in the Middle Neoproterozoic (Cryogenian) and closed by the Early Cambrian (Terreneuvian) with the final assembling of Gondwana. Rifting associated with the initial opening of the Paleozoic Iapetus Ocean began in the Late Neoproterozoic (late Ediacaran) and so overlapped in time with the closing of the Precambrian Gondwanan ocean. The southeastern margin of the Iapetus Ocean is defined by thick sequences of quartz-rich Cambrian sediments (within the St. Croix and Miramichi terranes of New Brunswick) that were largely derived from recycling of Precambrian passive-margin sedimentary rocks preserved in the Grand Manan and Brookville terranes of New Brunswick and in the Islesboro Terrane of Maine. These Precambrian terranes are interpreted to represent dextrally displaced basement remnants of the Gondwanan continental margin of Iapetus, consistent with the model of a two-sided Appalachian system proposed by Hank Williams in 1964 based on his work in Newfoundland.SOMMAIREDes données stratigraphiques et géochronologiques U–Pb obtenues récemment indiquent ... Article in Journal/Newspaper Ross Island University of New Brunswick: Centre for Digital Scholarship Journals Ross Island Manan ENVELOPE(8.748,8.748,62.793,62.793) Kent Island ENVELOPE(70.133,70.133,-49.033,-49.033) Priest Cove ENVELOPE(-55.881,-55.881,50.917,50.917) Duck Island ENVELOPE(69.612,69.612,-49.240,-49.240) Geoscience Canada 41 4 483 |
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Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
Recently gathered stratigraphic and U–Pb geochronological data indicate that the pre-Triassic rocks of the Grand Manan Terrane on the eastern side of Grand Manan Island can be divided into: (1) Middle Neoproterozoic (late Cryogenian) quartzose and carbonate sedimentary sequences (The Thoroughfare and Kent Island formations); (2) a Late Neoproterozoic (early Ediacaran) volcanic-arc sequence (Ingalls Head Formation); and (3) Late Neoproterozioc (mid- Ediacaran) to earliest Cambrian (early Terreneuvian) sedimentary and volcanic-arc sequences (Great Duck Island, Flagg Cove, Ross Island, North Head, Priest Cove, and Long Pond Bay formations). A comparison to Precambrian terranes on the New Brunswick mainland (Brookville and New River terranes) and in adjacent Maine (Islesboro Terrane) suggests that the sedimentary and volcanic sequences of the Grand Manan Terrane were deposited on the continental margin of a Precambrian ocean basin that opened during the breakup of Rodinia in the Middle Neoproterozoic (Cryogenian) and closed by the Early Cambrian (Terreneuvian) with the final assembling of Gondwana. Rifting associated with the initial opening of the Paleozoic Iapetus Ocean began in the Late Neoproterozoic (late Ediacaran) and so overlapped in time with the closing of the Precambrian Gondwanan ocean. The southeastern margin of the Iapetus Ocean is defined by thick sequences of quartz-rich Cambrian sediments (within the St. Croix and Miramichi terranes of New Brunswick) that were largely derived from recycling of Precambrian passive-margin sedimentary rocks preserved in the Grand Manan and Brookville terranes of New Brunswick and in the Islesboro Terrane of Maine. These Precambrian terranes are interpreted to represent dextrally displaced basement remnants of the Gondwanan continental margin of Iapetus, consistent with the model of a two-sided Appalachian system proposed by Hank Williams in 1964 based on his work in Newfoundland.SOMMAIREDes données stratigraphiques et géochronologiques U–Pb obtenues récemment indiquent ... |
format |
Article in Journal/Newspaper |
author |
Fyffe, Leslie R. |
spellingShingle |
Fyffe, Leslie R. The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
author_facet |
Fyffe, Leslie R. |
author_sort |
Fyffe, Leslie R. |
title |
The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
title_short |
The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
title_full |
The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
title_fullStr |
The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
title_full_unstemmed |
The Grand Manan Terrane of New Brunswick: Tectonostratigraphy and Relationship to the Gondwanan Margin of the Iapetus Ocean |
title_sort |
grand manan terrane of new brunswick: tectonostratigraphy and relationship to the gondwanan margin of the iapetus ocean |
publisher |
Geological Association of Canada |
publishDate |
2014 |
url |
https://journals.lib.unb.ca/index.php/GC/article/view/21442 |
long_lat |
ENVELOPE(8.748,8.748,62.793,62.793) ENVELOPE(70.133,70.133,-49.033,-49.033) ENVELOPE(-55.881,-55.881,50.917,50.917) ENVELOPE(69.612,69.612,-49.240,-49.240) |
geographic |
Ross Island Manan Kent Island Priest Cove Duck Island |
geographic_facet |
Ross Island Manan Kent Island Priest Cove Duck Island |
genre |
Ross Island |
genre_facet |
Ross Island |
op_source |
Geoscience Canada; Volume 41, Number 4 (2014); 483-502 1911-4850 0315-0941 |
op_relation |
https://journals.lib.unb.ca/index.php/GC/article/view/21442/25988 https://journals.lib.unb.ca/index.php/GC/article/view/21442 |
op_rights |
Copyright (c) 2015 Geoscience Canada |
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Geoscience Canada |
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41 |
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4 |
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483 |
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1766179500936134656 |