Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins
Continental collisions commonly involve highly curved passive plate margins, leading to diachronous continental subduction during trench rollback. Such systems may feature backarc extension and ophiolite obduction postdating initial collision. Modern examples include the Alboran and Banda arcs. Anci...
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Online Access: | http://dro.dur.ac.uk/33641/ http://dro.dur.ac.uk/33641/1/33641AOV.pdf http://dro.dur.ac.uk/33641/2/33641VoR.pdf https://doi.org/10.1130/G48919.1 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:33641 2023-05-15T17:22:23+02:00 Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins Schliffke, Nicholas van Hunen, Jeroen Gueydan, Frédéric Magni, Valentina Allen, Mark B. 2021 application/pdf http://dro.dur.ac.uk/33641/ http://dro.dur.ac.uk/33641/1/33641AOV.pdf http://dro.dur.ac.uk/33641/2/33641VoR.pdf https://doi.org/10.1130/G48919.1 unknown Wiley dro:33641 issn:0091-7613 issn: 1943-2682 doi:10.1130/G48919.1 http://dro.dur.ac.uk/33641/ https://doi.org/10.1130/G48919.1 http://dro.dur.ac.uk/33641/1/33641AOV.pdf http://dro.dur.ac.uk/33641/2/33641VoR.pdf © 2021 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license CC-BY Geology, 2021, Vol.49(12), pp.1436-1440 [Peer Reviewed Journal] Article PeerReviewed 2021 ftunivdurham https://doi.org/10.1130/G48919.1 2022-02-10T23:25:27Z Continental collisions commonly involve highly curved passive plate margins, leading to diachronous continental subduction during trench rollback. Such systems may feature backarc extension and ophiolite obduction postdating initial collision. Modern examples include the Alboran and Banda arcs. Ancient systems include the Newfoundland and Norwegian Caledonides. While external forces or preexisting weaknesses are often invoked, we suggest that ophiolite obduction can equally be caused by internal stress buildup during collision. Here, we modeled collision with an irregular subducting continental margin in three-dimensional (3-D) thermo-mechanical models and used the generated stress field evolution to understand resulting geologic processes. Results show how tensional stresses are localized in the overriding plate during the diachronous onset of collision. These stresses thin the overriding plate and may open a back-arc spreading center. Collision along the entire trench follows rapidly, with inversion of this spreading center, ophiolite obduction, and compression in the overriding plate. The models show how subduction of an irregular continental margin can form a highly curved orogenic belt. With this mechanism, obduction of back-arc oceanic lithosphere naturally evolves from a given initial margin geometry during continental collision. Article in Journal/Newspaper Newfoundland Durham University: Durham Research Online Geology 49 12 1436 1440 |
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Open Polar |
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Durham University: Durham Research Online |
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ftunivdurham |
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unknown |
description |
Continental collisions commonly involve highly curved passive plate margins, leading to diachronous continental subduction during trench rollback. Such systems may feature backarc extension and ophiolite obduction postdating initial collision. Modern examples include the Alboran and Banda arcs. Ancient systems include the Newfoundland and Norwegian Caledonides. While external forces or preexisting weaknesses are often invoked, we suggest that ophiolite obduction can equally be caused by internal stress buildup during collision. Here, we modeled collision with an irregular subducting continental margin in three-dimensional (3-D) thermo-mechanical models and used the generated stress field evolution to understand resulting geologic processes. Results show how tensional stresses are localized in the overriding plate during the diachronous onset of collision. These stresses thin the overriding plate and may open a back-arc spreading center. Collision along the entire trench follows rapidly, with inversion of this spreading center, ophiolite obduction, and compression in the overriding plate. The models show how subduction of an irregular continental margin can form a highly curved orogenic belt. With this mechanism, obduction of back-arc oceanic lithosphere naturally evolves from a given initial margin geometry during continental collision. |
format |
Article in Journal/Newspaper |
author |
Schliffke, Nicholas van Hunen, Jeroen Gueydan, Frédéric Magni, Valentina Allen, Mark B. |
spellingShingle |
Schliffke, Nicholas van Hunen, Jeroen Gueydan, Frédéric Magni, Valentina Allen, Mark B. Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
author_facet |
Schliffke, Nicholas van Hunen, Jeroen Gueydan, Frédéric Magni, Valentina Allen, Mark B. |
author_sort |
Schliffke, Nicholas |
title |
Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
title_short |
Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
title_full |
Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
title_fullStr |
Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
title_full_unstemmed |
Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
title_sort |
curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dro.dur.ac.uk/33641/ http://dro.dur.ac.uk/33641/1/33641AOV.pdf http://dro.dur.ac.uk/33641/2/33641VoR.pdf https://doi.org/10.1130/G48919.1 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Geology, 2021, Vol.49(12), pp.1436-1440 [Peer Reviewed Journal] |
op_relation |
dro:33641 issn:0091-7613 issn: 1943-2682 doi:10.1130/G48919.1 http://dro.dur.ac.uk/33641/ https://doi.org/10.1130/G48919.1 http://dro.dur.ac.uk/33641/1/33641AOV.pdf http://dro.dur.ac.uk/33641/2/33641VoR.pdf |
op_rights |
© 2021 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1130/G48919.1 |
container_title |
Geology |
container_volume |
49 |
container_issue |
12 |
container_start_page |
1436 |
op_container_end_page |
1440 |
_version_ |
1766108996437016576 |