Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland
ABSTRACT Fission track analyses of apatites from sediments, Precambrian gneisses and Caledonian to Tertiary intrusive rocks from the Kangerlussuaq region reveal its post‐Caledonian thermotectonic history. Inland the history involves cooling to temperatures within the high temperature part of the apa...
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crwiley:10.1111/j.1365-3121.1996.tb00771.x 2024-09-15T18:09:44+00:00 Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland Hansen, Kirsten 1996 http://dx.doi.org/10.1111/j.1365-3121.1996.tb00771.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.1996.tb00771.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.1996.tb00771.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 8, issue 5, page 458-469 ISSN 0954-4879 1365-3121 journal-article 1996 crwiley https://doi.org/10.1111/j.1365-3121.1996.tb00771.x 2024-07-25T04:19:24Z ABSTRACT Fission track analyses of apatites from sediments, Precambrian gneisses and Caledonian to Tertiary intrusive rocks from the Kangerlussuaq region reveal its post‐Caledonian thermotectonic history. Inland the history involves cooling to temperatures within the high temperature part of the apatite annealing interval and slow cooling (or reheating) continued in Cretaceous times through this interval. Apatites from coastal areas between Kangerlussuaq and Tasiilaq reveal only Tertiary cooling. In Tertiary times cooling accelerated after the main intrusive phase in the Tertiary. The evolution is taken as evidence for a general uplift/erosion since Caledonian times probably disturbed by basin formation and sedimentation and reheating due to magmatic activity. Thermal subsidence of the rift shoulders following the opening of the adjacent oceanic basin is not indicated. Annealing patterns inland of the plume centre in the Kangerlussuaq provide no evidence for the earlier movement of the plume from a westerly direction. Article in Journal/Newspaper Greenland Kangerlussuaq Tasiilaq Wiley Online Library Terra Nova 8 5 458 469 |
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Wiley Online Library |
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language |
English |
description |
ABSTRACT Fission track analyses of apatites from sediments, Precambrian gneisses and Caledonian to Tertiary intrusive rocks from the Kangerlussuaq region reveal its post‐Caledonian thermotectonic history. Inland the history involves cooling to temperatures within the high temperature part of the apatite annealing interval and slow cooling (or reheating) continued in Cretaceous times through this interval. Apatites from coastal areas between Kangerlussuaq and Tasiilaq reveal only Tertiary cooling. In Tertiary times cooling accelerated after the main intrusive phase in the Tertiary. The evolution is taken as evidence for a general uplift/erosion since Caledonian times probably disturbed by basin formation and sedimentation and reheating due to magmatic activity. Thermal subsidence of the rift shoulders following the opening of the adjacent oceanic basin is not indicated. Annealing patterns inland of the plume centre in the Kangerlussuaq provide no evidence for the earlier movement of the plume from a westerly direction. |
format |
Article in Journal/Newspaper |
author |
Hansen, Kirsten |
spellingShingle |
Hansen, Kirsten Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
author_facet |
Hansen, Kirsten |
author_sort |
Hansen, Kirsten |
title |
Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
title_short |
Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
title_full |
Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
title_fullStr |
Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
title_full_unstemmed |
Thermotectonic evolution of a rifted continental margin: fission track evidence from the Kangerlussuaq area, SE Greenland |
title_sort |
thermotectonic evolution of a rifted continental margin: fission track evidence from the kangerlussuaq area, se greenland |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1365-3121.1996.tb00771.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.1996.tb00771.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.1996.tb00771.x |
genre |
Greenland Kangerlussuaq Tasiilaq |
genre_facet |
Greenland Kangerlussuaq Tasiilaq |
op_source |
Terra Nova volume 8, issue 5, page 458-469 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3121.1996.tb00771.x |
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Terra Nova |
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8 |
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5 |
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458 |
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469 |
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1810447315972915200 |