Continental underplating after slab break-off
| العنوان: | Continental underplating after slab break-off |
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| المؤلفون: | Valentina Magni, Pierre Bouilhol, Mark B. Allen, J. van Hunen |
| المساهمون: | Centre for Earth Evolution and Dynamics [Oslo] (CEED), Department of Geosciences [Oslo], Faculty of Mathematics and Natural Sciences [Oslo], University of Oslo (UiO)-University of Oslo (UiO)-Faculty of Mathematics and Natural Sciences [Oslo], University of Oslo (UiO)-University of Oslo (UiO), Department of Earth Sciences [Durham], Durham University, Department of Earth Sciences [Swiss Federal Institute of Technology - ETH Zürich] (D-ERDW), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Laboratoire Magmas et Volcans (LMV), Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut de Recherche pour le Développement et la société-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS), ANR-10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism(2010), ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016), Department of Earth Sciences [Zürich], Eidgenössische Technische Hochschule [Zürich] ( ETH Zürich ), Laboratoire Magmas et Volcans ( LMV ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Jean Monnet [Saint-Étienne] ( UJM ) -Institut de Recherche pour le Développement et la société-Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), ANR-10-LABX-0006/10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism ( 2010 ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Recherche pour le Développement et la société-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Earth and Planetary Science Letters Earth and Planetary Science Letters, Elsevier, 2017, 474, pp.59-67. ⟨10.1016/j.epsl.2017.06.017⟩ Earth and Planetary Science Letters, Elsevier, 2017, 474, pp.59-67. 〈10.1016/j.epsl.2017.06.017〉 Earth and planetary science letters, 2017, Vol.474, pp.59-67 [Peer Reviewed Journal] Earth and Planetary Science Letters, 2017, 474, pp.59-67. ⟨10.1016/j.epsl.2017.06.017⟩ |
| بيانات النشر: | HAL CCSD, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography, 010502 geochemistry & geophysics, 01 natural sciences, Obduction, Continental margin, continental collision, Geochemistry and Petrology, underplating, slab break-off, Earth and Planetary Sciences (miscellaneous), Convergent boundary, Petrology, 0105 earth and related environmental sciences, [ SDU.STU.PE ] Sciences of the Universe [physics]/Earth Sciences/Petrography, Underplating, Continental crust, numerical modelling, subduction dynamics, Geophysics, Collision zone, Seafloor spreading, Space and Planetary Science, Slab window, Geology |
| الوصف: | Co-auteur étranger; International audience; We present three-dimensional numerical models to investigate the dynamics of continental collision, and in particular what happens to the subducted continental lithosphere after oceanic slab break-off. We find that in some scenarios the subducting continental lithosphere underthrusts the overriding plate not immediately after it enters the trench, but after oceanic slab break-off. In this case, the continental plate first subducts with a steep angle and then, after the slab breaks off at depth, it rises back towards the surface and flattens below the overriding plate, forming a thick horizontal layer of continental crust that extends for about 200 km beyond the suture. This type of behaviour depends on the width of the oceanic plate marginal to the collision zone: wide oceanic margins promote continental underplating and marginal back-arc basins; narrow margins do not show such underplating unless a far field force is applied. Our models show that, as the subducted continental lithosphere rises, the mantle wedge progressively migrates away from the suture and the continental crust heats up, reaching temperatures >900◦C. This heating might lead to crustal melting, and resultant magmatism. We observe a sharp peak in the overriding plate rock uplift right after the occurrence of slab break-off. Afterwards, during underplating, the maximum rock uplift is smaller, but the affected area is much wider (up to 350 km). These results can be used to explain the dynamics that led to the present-day crustal configuration of the India–Eurasia collision zone and its consequences for the regional tectonic and magmatic evolution.©2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0012-821X |
| DOI: | 10.1016/j.epsl.2017.06.017⟩ |
| DOI: | 10.1016/j.epsl.2017.06.017〉 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::990dd94f73d5c2ec3c961abfb77ddab0 https://hal.uca.fr/hal-01785205 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....990dd94f73d5c2ec3c961abfb77ddab0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0012821X |
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| DOI: | 10.1016/j.epsl.2017.06.017⟩ |