The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate
Onshore geological investigations in the Smith Sound region are now so advanced as to allow correlation between Canada and Greenland to be made with confidence. The Precambrian Shield is unconformably overlain by unmetamorphosed Proterozoicstrata (Thule Group) that are best preserved in Greenland, w...
Published in: | Meddelelser om Grønland. Geoscience |
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The Commission for Scientific Research in Greenland /Danish Polar Center
1982
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Online Access: | https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030 |
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ftkbcopenhojs:oai:ojs.tidsskrift.dk:article/141030 2024-01-28T10:04:38+01:00 The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate Dawes, Peter R. Frisch, Thomas L. Christie, Robert 1982-06-10 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030/184928 https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030 Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 89-104 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 89-104 1600-4590 0106-1046 10.7146/moggeosci.v8i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1982 ftkbcopenhojs https://doi.org/10.7146/moggeosci.v8i 2024-01-03T23:58:29Z Onshore geological investigations in the Smith Sound region are now so advanced as to allow correlation between Canada and Greenland to be made with confidence. The Precambrian Shield is unconformably overlain by unmetamorphosed Proterozoicstrata (Thule Group) that are best preserved in Greenland, where they attain a thickness of at least 4.5 km. Less than 1100 m are present in south-eastern Ellesmere Island, but the succession is so similar to the lower part of the Greenland succession that unit to unit correlation of both sedimentary and volcanic rocks is possible. This correlation strongly supports the concept of a single in tracratonic basin (Thule Basin) spanning the southernmost part of Nares Strait. In Greenland the basin is well defined and its northern margin is at about 78°15'N. In Ellesmere Island paucity of outcrop provides less definition but the northern margin lies between Baird Inlet (78°30'N) and Bache Peninsula (79°N). The lithological and thickness correlation of the Proterozoic successions on the opposite shores of the Smith Sound region strongly suggests that any tectonic movement along the Nares Strait lineament has not resulted in major net transcurrent displacement of Greenland and Ellesmere Island. Article in Journal/Newspaper Bache Peninsula Ellesmere Island Greenland Nares strait Smith sound Thule Tidsskrift.dk (The Royal Library, Denmark) Bache Peninsula ENVELOPE(-75.589,-75.589,79.173,79.173) Baird Inlet ENVELOPE(-75.830,-75.830,78.469,78.469) Canada Ellesmere Island Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Smith Sound ENVELOPE(-73.996,-73.996,78.419,78.419) Meddelelser om Grønland. Geoscience 8 |
institution |
Open Polar |
collection |
Tidsskrift.dk (The Royal Library, Denmark) |
op_collection_id |
ftkbcopenhojs |
language |
English |
description |
Onshore geological investigations in the Smith Sound region are now so advanced as to allow correlation between Canada and Greenland to be made with confidence. The Precambrian Shield is unconformably overlain by unmetamorphosed Proterozoicstrata (Thule Group) that are best preserved in Greenland, where they attain a thickness of at least 4.5 km. Less than 1100 m are present in south-eastern Ellesmere Island, but the succession is so similar to the lower part of the Greenland succession that unit to unit correlation of both sedimentary and volcanic rocks is possible. This correlation strongly supports the concept of a single in tracratonic basin (Thule Basin) spanning the southernmost part of Nares Strait. In Greenland the basin is well defined and its northern margin is at about 78°15'N. In Ellesmere Island paucity of outcrop provides less definition but the northern margin lies between Baird Inlet (78°30'N) and Bache Peninsula (79°N). The lithological and thickness correlation of the Proterozoic successions on the opposite shores of the Smith Sound region strongly suggests that any tectonic movement along the Nares Strait lineament has not resulted in major net transcurrent displacement of Greenland and Ellesmere Island. |
format |
Article in Journal/Newspaper |
author |
Dawes, Peter R. Frisch, Thomas L. Christie, Robert |
spellingShingle |
Dawes, Peter R. Frisch, Thomas L. Christie, Robert The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
author_facet |
Dawes, Peter R. Frisch, Thomas L. Christie, Robert |
author_sort |
Dawes, Peter R. |
title |
The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
title_short |
The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
title_full |
The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
title_fullStr |
The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
title_full_unstemmed |
The Proterozoic Thule Basin of Greenland and Ellesmere Island: importance to the Nares Strait debate |
title_sort |
proterozoic thule basin of greenland and ellesmere island: importance to the nares strait debate |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
1982 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030 |
long_lat |
ENVELOPE(-75.589,-75.589,79.173,79.173) ENVELOPE(-75.830,-75.830,78.469,78.469) ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-73.996,-73.996,78.419,78.419) |
geographic |
Bache Peninsula Baird Inlet Canada Ellesmere Island Greenland Nares Smith Sound |
geographic_facet |
Bache Peninsula Baird Inlet Canada Ellesmere Island Greenland Nares Smith Sound |
genre |
Bache Peninsula Ellesmere Island Greenland Nares strait Smith sound Thule |
genre_facet |
Bache Peninsula Ellesmere Island Greenland Nares strait Smith sound Thule |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 89-104 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 89-104 1600-4590 0106-1046 10.7146/moggeosci.v8i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030/184928 https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030 |
op_doi |
https://doi.org/10.7146/moggeosci.v8i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
8 |
_version_ |
1789330400768688128 |