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...

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Published in:Meddelelser om Grønland. Geoscience
Main Authors: Dawes, Peter R., Frisch, Thomas, L. Christie, Robert
Format: Article in Journal/Newspaper
Language:English
Published: The Commission for Scientific Research in Greenland /Danish Polar Center 1982
Subjects:
Online Access:https://tidsskrift.dk/meddrgroenland_geosci/article/view/141030
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spelling 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
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