The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides
[1] The Lofoten archipelago exposes Precambrian Baltic basement and Caledonian allochthonous sequences within a 1000 km long chain of gravity and magnetic highs and structural culminations along the extended, British and Norwegian continental shelf. Previous regional geophysical studies indicate tha...
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Online Access: | https://doi.org/10.1029/2003TC001522 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003TC001522 https://aurora.auburn.edu/handle/11200/50364 https://doi.org/10.35099/aurora-432 |
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ftunivauburn:oai:aurora.auburn.edu:11200/50364 2023-09-26T15:19:57+02:00 The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides Steltenpohl, Mark Hames, Willis Andresen, Arild Mark Steltenpohl, stelmg@mail.auburn.edu 2004 PDF application/pdf https://doi.org/10.1029/2003TC001522 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003TC001522 https://aurora.auburn.edu/handle/11200/50364 https://doi.org/10.35099/aurora-432 unknown 0278-7407 doi:10.1029/2003TC001522 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003TC001522 https://aurora.auburn.edu/handle/11200/50364 http://dx.doi.org/10.35099/aurora-432 ©American Geophysical Union 2004. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Steltenpohl, Mark G., Willis E. Hames, and Arild Andresen. "The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides." Tectonics 23.1 (2004). Text Journal Article, Academic Journal 2004 ftunivauburn https://doi.org/10.1029/2003TC00152210.35099/aurora-432 2023-08-29T09:38:44Z [1] The Lofoten archipelago exposes Precambrian Baltic basement and Caledonian allochthonous sequences within a 1000 km long chain of gravity and magnetic highs and structural culminations along the extended, British and Norwegian continental shelf. Previous regional geophysical studies indicate that post-Caledonian extension and development of the northern Norwegian shelf occurred during broadly defined Carboniferous-Permian, Cretaceous-Jurassic, and early Tertiary events. Structures related to these events are known to young westward. We report field, structural, and Ar-40/Ar-39 thermochronologic data from rocks exposed in Lofoten that further define the history and style of post-Caledonian extension. The islands of southwest Lofoten also represent the most outboard exposures of Caledonian basement in northern Norway that presumably formed the middle to deep crustal core of the orogen. Metasedimentary rocks and penetratively deformed basement in Lofoten record high-grade Silurian-Devonian metamorphism and top-to-the-east ( hereinafter tops-east) thrusting followed by episodes of Late Devonian to Early Carboniferous, tops-west, ductile extension which progressed into oblique left-slip movements. The structural style and timing of Silurian contraction in this area are remarkably similar to that determined for the more forelandward areas on the mainland, similar to 120 km to the east, supporting the inference that distal parts of the Baltic continental margin that were once deeply subducted are presently exposed in Lofoten. The timings of post-Devonian structural events that affected rocks in Lofoten are partially constrained by the ages of unconformities and strata known to be preserved in graben flanking the Lofoten culmination. The radiometric age and structural data presented in this study, in combination with stratigraphic constraints, suggest a westward progression through time of extensional deformation over a protracted interval of Silurian to Permian time. The latest, Permian extension in Lofoten is ... Text Lofoten Northern Norway AUrora - Auburn University Scholarly Repository Lofoten Norway Tectonics 23 1 n/a n/a |
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Open Polar |
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AUrora - Auburn University Scholarly Repository |
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ftunivauburn |
language |
unknown |
description |
[1] The Lofoten archipelago exposes Precambrian Baltic basement and Caledonian allochthonous sequences within a 1000 km long chain of gravity and magnetic highs and structural culminations along the extended, British and Norwegian continental shelf. Previous regional geophysical studies indicate that post-Caledonian extension and development of the northern Norwegian shelf occurred during broadly defined Carboniferous-Permian, Cretaceous-Jurassic, and early Tertiary events. Structures related to these events are known to young westward. We report field, structural, and Ar-40/Ar-39 thermochronologic data from rocks exposed in Lofoten that further define the history and style of post-Caledonian extension. The islands of southwest Lofoten also represent the most outboard exposures of Caledonian basement in northern Norway that presumably formed the middle to deep crustal core of the orogen. Metasedimentary rocks and penetratively deformed basement in Lofoten record high-grade Silurian-Devonian metamorphism and top-to-the-east ( hereinafter tops-east) thrusting followed by episodes of Late Devonian to Early Carboniferous, tops-west, ductile extension which progressed into oblique left-slip movements. The structural style and timing of Silurian contraction in this area are remarkably similar to that determined for the more forelandward areas on the mainland, similar to 120 km to the east, supporting the inference that distal parts of the Baltic continental margin that were once deeply subducted are presently exposed in Lofoten. The timings of post-Devonian structural events that affected rocks in Lofoten are partially constrained by the ages of unconformities and strata known to be preserved in graben flanking the Lofoten culmination. The radiometric age and structural data presented in this study, in combination with stratigraphic constraints, suggest a westward progression through time of extensional deformation over a protracted interval of Silurian to Permian time. The latest, Permian extension in Lofoten is ... |
author2 |
Mark Steltenpohl, stelmg@mail.auburn.edu |
format |
Text |
author |
Steltenpohl, Mark Hames, Willis Andresen, Arild |
spellingShingle |
Steltenpohl, Mark Hames, Willis Andresen, Arild The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
author_facet |
Steltenpohl, Mark Hames, Willis Andresen, Arild |
author_sort |
Steltenpohl, Mark |
title |
The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
title_short |
The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
title_full |
The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
title_fullStr |
The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
title_full_unstemmed |
The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides |
title_sort |
silurian to permian history of a metamorphic core complex in lofoten, northern scandinavian caledonides |
publishDate |
2004 |
url |
https://doi.org/10.1029/2003TC001522 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003TC001522 https://aurora.auburn.edu/handle/11200/50364 https://doi.org/10.35099/aurora-432 |
geographic |
Lofoten Norway |
geographic_facet |
Lofoten Norway |
genre |
Lofoten Northern Norway |
genre_facet |
Lofoten Northern Norway |
op_relation |
0278-7407 doi:10.1029/2003TC001522 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003TC001522 https://aurora.auburn.edu/handle/11200/50364 http://dx.doi.org/10.35099/aurora-432 |
op_rights |
©American Geophysical Union 2004. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Steltenpohl, Mark G., Willis E. Hames, and Arild Andresen. "The Silurian to Permian history of a metamorphic core complex in Lofoten, northern Scandinavian Caledonides." Tectonics 23.1 (2004). |
op_doi |
https://doi.org/10.1029/2003TC00152210.35099/aurora-432 |
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Tectonics |
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23 |
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1 |
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1778143422681448448 |