A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland
The Proterozoic Nagssugtoqidian and Ketilidian mobile belts are comparable in scale with those of the Phanerozoic rather than those of the Archaean. These two Proterozoic belts differ from one another both in the tectonic displacements which gave rise to them, and in their thermal activities as expr...
Published in: | Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences |
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Online Access: | http://dx.doi.org/10.1098/rsta.1973.0015 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1973.0015 |
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crroyalsociety:10.1098/rsta.1973.0015 2024-06-02T08:07:32+00:00 A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland 1973 http://dx.doi.org/10.1098/rsta.1973.0015 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1973.0015 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences volume 273, issue 1235, page 513-533 ISSN 0080-4614 2054-0272 journal-article 1973 crroyalsociety https://doi.org/10.1098/rsta.1973.0015 2024-05-07T14:16:42Z The Proterozoic Nagssugtoqidian and Ketilidian mobile belts are comparable in scale with those of the Phanerozoic rather than those of the Archaean. These two Proterozoic belts differ from one another both in the tectonic displacements which gave rise to them, and in their thermal activities as expressed by igneous and metamorphic characteristics. Similar differences between modern tectonic belts have been interpreted in terms of plate tectonics. The Nagssugtoqidian is characterized by considerable crustal shortening, very limited igneous activity, and high-pressure regional metamorphism which may be related to crustal thickening resulting from both ductile and brittle overthrusting of the Nagssugtoqidian rocks over the Archaean foreland. Evidence of crustal shortening in the Ketilidian is limited, but vertical and transcurrent movements are important. Widespread igneous activity throughout the active history of the belt resulted in the formation of mainly acid volcanic supracrustal rocks and widespread granite intrusion. The appinite suite is also well represented. Metamorphism is mainly of low-pressure type. A tentative comparison can be made between the Alpine and Nagssugtoqidian belts on the one hand, and Andean and Ketilidian belts on the other. Article in Journal/Newspaper Greenland The Royal Society Greenland Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 273 1235 513 533 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
The Proterozoic Nagssugtoqidian and Ketilidian mobile belts are comparable in scale with those of the Phanerozoic rather than those of the Archaean. These two Proterozoic belts differ from one another both in the tectonic displacements which gave rise to them, and in their thermal activities as expressed by igneous and metamorphic characteristics. Similar differences between modern tectonic belts have been interpreted in terms of plate tectonics. The Nagssugtoqidian is characterized by considerable crustal shortening, very limited igneous activity, and high-pressure regional metamorphism which may be related to crustal thickening resulting from both ductile and brittle overthrusting of the Nagssugtoqidian rocks over the Archaean foreland. Evidence of crustal shortening in the Ketilidian is limited, but vertical and transcurrent movements are important. Widespread igneous activity throughout the active history of the belt resulted in the formation of mainly acid volcanic supracrustal rocks and widespread granite intrusion. The appinite suite is also well represented. Metamorphism is mainly of low-pressure type. A tentative comparison can be made between the Alpine and Nagssugtoqidian belts on the one hand, and Andean and Ketilidian belts on the other. |
format |
Article in Journal/Newspaper |
title |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
spellingShingle |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
title_short |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
title_full |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
title_fullStr |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
title_full_unstemmed |
A Discussion on the evolution of the Precambrian crust - Tectonic displacements and thermal activity in two contrasting Proterozoic mobile belts from Greenland |
title_sort |
discussion on the evolution of the precambrian crust - tectonic displacements and thermal activity in two contrasting proterozoic mobile belts from greenland |
publisher |
The Royal Society |
publishDate |
1973 |
url |
http://dx.doi.org/10.1098/rsta.1973.0015 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.1973.0015 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences volume 273, issue 1235, page 513-533 ISSN 0080-4614 2054-0272 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.1973.0015 |
container_title |
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences |
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273 |
container_issue |
1235 |
container_start_page |
513 |
op_container_end_page |
533 |
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1800752629945466880 |