Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone

We present a new crust and upper mantle cross section of the western India-Eurasia collision zone by combining geological, geophysical, and petrological information within a self-consistent thermodynamic framework. We characterize the upper mantle structure down to 410 km depth from the thermal, com...

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Detalles Bibliográficos
Autores: Tunini, Lavinia, Jimenez-Munt, Ivone, Fernández Ortiga, Manel, Vergés Masip, Jaume, Villaseñor, Antonio, Melchiorre, Massimiliano, Afonso, Juan Carlos
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/136633
Acceso en línea:http://hdl.handle.net/10261/136633
Access Level:acceso abierto
Palabra clave:gravity-geoid
Himalaya
lithosphere
mantle composition
Tarim
Tibet
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spelling Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zoneTunini, LaviniaJimenez-Munt, IvoneFernández Ortiga, ManelVergés Masip, JaumeVillaseñor, AntonioMelchiorre, MassimilianoAfonso, Juan Carlosgravity-geoidHimalayalithospheremantle compositionTarimTibetWe present a new crust and upper mantle cross section of the western India-Eurasia collision zone by combining geological, geophysical, and petrological information within a self-consistent thermodynamic framework. We characterize the upper mantle structure down to 410 km depth from the thermal, compositional, and seismological viewpoints along a profile crossing western Himalayan orogen and Tibetan Plateau, Tarim Basin, Tian Shan, and Junggar Basin, ending in the Chinese Altai Range. Our results show that the Moho deepens from the Himalayan foreland basin (~40 km depth) to the Kunlun Shan (~90 km depth), and it shallows to less than 50 km beneath the Tarim Basin. Crustal thickness between the Tian Shan and Altai mountains varies from ~66 km to ~62 km. The depth of the lithosphere-asthenosphere boundary (LAB) increases from 230 km below the Himalayan foreland basin to 295 km below the Kunlun Shan. To NE the LAB shallows to ~230 km below the Tarim Basin and increases again to ~260 km below Tian Shan and Junggar region and to ~280 km below the Altai Range. Lateral variations of the seismic anomalies are compatible with variations in the lithospheric mantle composition retrieved from global petrological data. We also model a preexisting profile in the eastern India-Eurasia collision zone and discuss the along-strike variations of the lithospheric structure. We confirm the presence of a noticeable lithospheric mantle thinning below the Eastern Tibetan Plateau, with the LAB located at 140 km depth, and of mantle compositional differences between the Tibetan Plateau and the northern domains of Qilian Shan, Qaidam Basin, and North China. ©2016. American Geophysical Union. All Rights Reserved.The present work has been supported by ATIZA (CGL2009-09662-BTE), TECLA (CGL2011-26670), and MITE (CGL2014-59516-P) projects. This is contribution 618 from the ARC Centre of Excellence for Core to Crust Fluid Systems and 1005 in the GEMOC Key Centre (ARC grant DP120102372).Peer reviewedAmerican Geophysical UnionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/136633reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1002/2016TC004161Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1366332026-05-22T06:33:51Z
dc.title.none.fl_str_mv Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
title Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
spellingShingle Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
Tunini, Lavinia
gravity-geoid
Himalaya
lithosphere
mantle composition
Tarim
Tibet
title_short Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
title_full Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
title_fullStr Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
title_full_unstemmed Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
title_sort Geophysical-petrological model of the crust and upper mantle in the India-Eurasia collision zone
dc.creator.none.fl_str_mv Tunini, Lavinia
Jimenez-Munt, Ivone
Fernández Ortiga, Manel
Vergés Masip, Jaume
Villaseñor, Antonio
Melchiorre, Massimiliano
Afonso, Juan Carlos
author Tunini, Lavinia
author_facet Tunini, Lavinia
Jimenez-Munt, Ivone
Fernández Ortiga, Manel
Vergés Masip, Jaume
Villaseñor, Antonio
Melchiorre, Massimiliano
Afonso, Juan Carlos
author_role author
author2 Jimenez-Munt, Ivone
Fernández Ortiga, Manel
Vergés Masip, Jaume
Villaseñor, Antonio
Melchiorre, Massimiliano
Afonso, Juan Carlos
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv gravity-geoid
Himalaya
lithosphere
mantle composition
Tarim
Tibet
topic gravity-geoid
Himalaya
lithosphere
mantle composition
Tarim
Tibet
description We present a new crust and upper mantle cross section of the western India-Eurasia collision zone by combining geological, geophysical, and petrological information within a self-consistent thermodynamic framework. We characterize the upper mantle structure down to 410 km depth from the thermal, compositional, and seismological viewpoints along a profile crossing western Himalayan orogen and Tibetan Plateau, Tarim Basin, Tian Shan, and Junggar Basin, ending in the Chinese Altai Range. Our results show that the Moho deepens from the Himalayan foreland basin (~40 km depth) to the Kunlun Shan (~90 km depth), and it shallows to less than 50 km beneath the Tarim Basin. Crustal thickness between the Tian Shan and Altai mountains varies from ~66 km to ~62 km. The depth of the lithosphere-asthenosphere boundary (LAB) increases from 230 km below the Himalayan foreland basin to 295 km below the Kunlun Shan. To NE the LAB shallows to ~230 km below the Tarim Basin and increases again to ~260 km below Tian Shan and Junggar region and to ~280 km below the Altai Range. Lateral variations of the seismic anomalies are compatible with variations in the lithospheric mantle composition retrieved from global petrological data. We also model a preexisting profile in the eastern India-Eurasia collision zone and discuss the along-strike variations of the lithospheric structure. We confirm the presence of a noticeable lithospheric mantle thinning below the Eastern Tibetan Plateau, with the LAB located at 140 km depth, and of mantle compositional differences between the Tibetan Plateau and the northern domains of Qilian Shan, Qaidam Basin, and North China. ©2016. American Geophysical Union. All Rights Reserved.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/136633
url http://hdl.handle.net/10261/136633
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1002/2016TC004161
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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