Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy

Autores
Ben Mansour, Walid; Wiens, Douglas A.; Mark, Hannah F.; Russo, Raymond M.; Richter, Andreas Jorg; Marderwald, Eric Rodolfo; Barrientos, Sergio
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Geological processes in Southern Patagonia are affected by the Patagonian slab window, formed by the subduction of the Chile Ridge and subsequent northward migration of the Chile Triple Junction. Using shear wave splitting analysis, we observe strong splitting of up to 2.5 s with an E-W fast direction just south of the triple junction and the edge of the subducting Nazca slab. This region of strong anisotropy is coincident with low uppermost mantle shear velocities and an absence of mantle lithosphere, indicating that the mantle flow occurs in a warm, low-viscosity, 200–300 km wide shallow mantle channel just to the south of the Nazca slab. The region of flow corresponds to a volcanic gap caused by depleted mantle compositions and absence of slab-derived water. In most of Patagonia to the south of this channel, splitting fast directions trend NE-SW consistent with large-scale asthenospheric flow.
Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados Unidos
Fil: Wiens, Douglas A.. Washington University in St. Louis; Estados Unidos
Fil: Mark, Hannah F.. Washington University in St. Louis; Estados Unidos
Fil: Russo, Raymond M.. University of Florida; Estados Unidos
Fil: Richter, Andreas Jorg. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; Argentina
Fil: Marderwald, Eric Rodolfo. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Barrientos, Sergio. Universidad de Chile; Chile
Materia
SHEAR-WAVE SPLITTING
MANTLE FLOW
PATAGONIAN SLAB WINDOW
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/223548
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal AnisotropyBen Mansour, WalidWiens, Douglas A.Mark, Hannah F.Russo, Raymond M.Richter, Andreas JorgMarderwald, Eric RodolfoBarrientos, SergioSHEAR-WAVE SPLITTINGMANTLE FLOWPATAGONIAN SLAB WINDOWhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Geological processes in Southern Patagonia are affected by the Patagonian slab window, formed by the subduction of the Chile Ridge and subsequent northward migration of the Chile Triple Junction. Using shear wave splitting analysis, we observe strong splitting of up to 2.5 s with an E-W fast direction just south of the triple junction and the edge of the subducting Nazca slab. This region of strong anisotropy is coincident with low uppermost mantle shear velocities and an absence of mantle lithosphere, indicating that the mantle flow occurs in a warm, low-viscosity, 200–300 km wide shallow mantle channel just to the south of the Nazca slab. The region of flow corresponds to a volcanic gap caused by depleted mantle compositions and absence of slab-derived water. In most of Patagonia to the south of this channel, splitting fast directions trend NE-SW consistent with large-scale asthenospheric flow.Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados UnidosFil: Wiens, Douglas A.. Washington University in St. Louis; Estados UnidosFil: Mark, Hannah F.. Washington University in St. Louis; Estados UnidosFil: Russo, Raymond M.. University of Florida; Estados UnidosFil: Richter, Andreas Jorg. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; ArgentinaFil: Marderwald, Eric Rodolfo. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Barrientos, Sergio. Universidad de Chile; ChileAmerican Geophysical Union2022-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/223548Ben Mansour, Walid; Wiens, Douglas A.; Mark, Hannah F.; Russo, Raymond M.; Richter, Andreas Jorg; et al.; Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy; American Geophysical Union; Geophysical Research Letters; 49; 18; 9-2022; 1-100094-8276CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL099871info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:53:56Zoai:ri.conicet.gov.ar:11336/223548instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:53:57.077CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
title Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
spellingShingle Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
Ben Mansour, Walid
SHEAR-WAVE SPLITTING
MANTLE FLOW
PATAGONIAN SLAB WINDOW
title_short Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
title_full Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
title_fullStr Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
title_full_unstemmed Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
title_sort Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy
dc.creator.none.fl_str_mv Ben Mansour, Walid
Wiens, Douglas A.
Mark, Hannah F.
Russo, Raymond M.
Richter, Andreas Jorg
Marderwald, Eric Rodolfo
Barrientos, Sergio
author Ben Mansour, Walid
author_facet Ben Mansour, Walid
Wiens, Douglas A.
Mark, Hannah F.
Russo, Raymond M.
Richter, Andreas Jorg
Marderwald, Eric Rodolfo
Barrientos, Sergio
author_role author
author2 Wiens, Douglas A.
Mark, Hannah F.
Russo, Raymond M.
Richter, Andreas Jorg
Marderwald, Eric Rodolfo
Barrientos, Sergio
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv SHEAR-WAVE SPLITTING
MANTLE FLOW
PATAGONIAN SLAB WINDOW
topic SHEAR-WAVE SPLITTING
MANTLE FLOW
PATAGONIAN SLAB WINDOW
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Geological processes in Southern Patagonia are affected by the Patagonian slab window, formed by the subduction of the Chile Ridge and subsequent northward migration of the Chile Triple Junction. Using shear wave splitting analysis, we observe strong splitting of up to 2.5 s with an E-W fast direction just south of the triple junction and the edge of the subducting Nazca slab. This region of strong anisotropy is coincident with low uppermost mantle shear velocities and an absence of mantle lithosphere, indicating that the mantle flow occurs in a warm, low-viscosity, 200–300 km wide shallow mantle channel just to the south of the Nazca slab. The region of flow corresponds to a volcanic gap caused by depleted mantle compositions and absence of slab-derived water. In most of Patagonia to the south of this channel, splitting fast directions trend NE-SW consistent with large-scale asthenospheric flow.
Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados Unidos
Fil: Wiens, Douglas A.. Washington University in St. Louis; Estados Unidos
Fil: Mark, Hannah F.. Washington University in St. Louis; Estados Unidos
Fil: Russo, Raymond M.. University of Florida; Estados Unidos
Fil: Richter, Andreas Jorg. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; Argentina
Fil: Marderwald, Eric Rodolfo. Universidad Nacional de la Plata. Facultad de Cs.astronomicas y Geofisicas. Laboratorio Maggia.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Barrientos, Sergio. Universidad de Chile; Chile
description Geological processes in Southern Patagonia are affected by the Patagonian slab window, formed by the subduction of the Chile Ridge and subsequent northward migration of the Chile Triple Junction. Using shear wave splitting analysis, we observe strong splitting of up to 2.5 s with an E-W fast direction just south of the triple junction and the edge of the subducting Nazca slab. This region of strong anisotropy is coincident with low uppermost mantle shear velocities and an absence of mantle lithosphere, indicating that the mantle flow occurs in a warm, low-viscosity, 200–300 km wide shallow mantle channel just to the south of the Nazca slab. The region of flow corresponds to a volcanic gap caused by depleted mantle compositions and absence of slab-derived water. In most of Patagonia to the south of this channel, splitting fast directions trend NE-SW consistent with large-scale asthenospheric flow.
publishDate 2022
dc.date.none.fl_str_mv 2022-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/223548
Ben Mansour, Walid; Wiens, Douglas A.; Mark, Hannah F.; Russo, Raymond M.; Richter, Andreas Jorg; et al.; Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy; American Geophysical Union; Geophysical Research Letters; 49; 18; 9-2022; 1-10
0094-8276
CONICET Digital
CONICET
url http://hdl.handle.net/11336/223548
identifier_str_mv Ben Mansour, Walid; Wiens, Douglas A.; Mark, Hannah F.; Russo, Raymond M.; Richter, Andreas Jorg; et al.; Mantle Flow Pattern Associated With the Patagonian Slab Window Determined From Azimuthal Anisotropy; American Geophysical Union; Geophysical Research Letters; 49; 18; 9-2022; 1-10
0094-8276
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL099871
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613642629152768
score 13.070432

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