Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography

Autores
Ben Mansour, Walid; Maupin, Valerie; Wiens, Douglas A.; Richter, Andreas Jorg
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The subduction of the Chile Ridge beneath South America beginning 12–16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46°S. Geodynamic processes associated with the slab window are poorly understood. Here we apply finite‐frequency P and SH body wave tomography to seismic data from several temporary arrays as well as regional stations to image seismic heterogeneities down to 650 km depth. The results show strong low velocity anomalies extending to 400 km depth beneath recent back‐arc volcanism between 46°S and 48°S, suggesting a link to thermal upwelling in the upper mantle. The southern edge of the Nazca slab extends aseismically down to at least 350 km. We also image low upper mantle seismic velocities beneath the Patagonia icefields, suggesting low viscosity modulates the patterns of uplift and horizontal deformation observed by GNSS.
Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados Unidos
Fil: Maupin, Valerie. University of Oslo; Noruega
Fil: Wiens, Douglas A.. Washington University in St. Louis; Estados Unidos
Fil: Richter, Andreas Jorg. 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
Materia
SEISMOLOGY
TOMOGRAPHY
PATAGONIA
SLAB WINDOW
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/278929
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/278929
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave TomographyBen Mansour, WalidMaupin, ValerieWiens, Douglas A.Richter, Andreas JorgSEISMOLOGYTOMOGRAPHYPATAGONIASLAB WINDOWhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The subduction of the Chile Ridge beneath South America beginning 12–16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46°S. Geodynamic processes associated with the slab window are poorly understood. Here we apply finite‐frequency P and SH body wave tomography to seismic data from several temporary arrays as well as regional stations to image seismic heterogeneities down to 650 km depth. The results show strong low velocity anomalies extending to 400 km depth beneath recent back‐arc volcanism between 46°S and 48°S, suggesting a link to thermal upwelling in the upper mantle. The southern edge of the Nazca slab extends aseismically down to at least 350 km. We also image low upper mantle seismic velocities beneath the Patagonia icefields, suggesting low viscosity modulates the patterns of uplift and horizontal deformation observed by GNSS.Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados UnidosFil: Maupin, Valerie. University of Oslo; NoruegaFil: Wiens, Douglas A.. Washington University in St. Louis; Estados UnidosFil: Richter, Andreas Jorg. 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; ArgentinaAmerican Geophysical Union2025-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/278929Ben Mansour, Walid; Maupin, Valerie; Wiens, Douglas A.; Richter, Andreas Jorg; Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography; American Geophysical Union; Geophysical Research Letters; 52; 17; 8-2025; 1-110094-8276CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115915info:eu-repo/semantics/altIdentifier/doi/10.1029/2025GL115915info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-01-14T12:05:48Zoai:ri.conicet.gov.ar:11336/278929instacron: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:34982026-01-14 12:05:48.51CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
title Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
spellingShingle Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
Ben Mansour, Walid
SEISMOLOGY
TOMOGRAPHY
PATAGONIA
SLAB WINDOW
title_short Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
title_full Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
title_fullStr Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
title_full_unstemmed Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
title_sort Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography
dc.creator.none.fl_str_mv Ben Mansour, Walid
Maupin, Valerie
Wiens, Douglas A.
Richter, Andreas Jorg
author Ben Mansour, Walid
author_facet Ben Mansour, Walid
Maupin, Valerie
Wiens, Douglas A.
Richter, Andreas Jorg
author_role author
author2 Maupin, Valerie
Wiens, Douglas A.
Richter, Andreas Jorg
author2_role author
author
author
dc.subject.none.fl_str_mv SEISMOLOGY
TOMOGRAPHY
PATAGONIA
SLAB WINDOW
topic SEISMOLOGY
TOMOGRAPHY
PATAGONIA
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 The subduction of the Chile Ridge beneath South America beginning 12–16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46°S. Geodynamic processes associated with the slab window are poorly understood. Here we apply finite‐frequency P and SH body wave tomography to seismic data from several temporary arrays as well as regional stations to image seismic heterogeneities down to 650 km depth. The results show strong low velocity anomalies extending to 400 km depth beneath recent back‐arc volcanism between 46°S and 48°S, suggesting a link to thermal upwelling in the upper mantle. The southern edge of the Nazca slab extends aseismically down to at least 350 km. We also image low upper mantle seismic velocities beneath the Patagonia icefields, suggesting low viscosity modulates the patterns of uplift and horizontal deformation observed by GNSS.
Fil: Ben Mansour, Walid. Washington University in St. Louis; Estados Unidos
Fil: Maupin, Valerie. University of Oslo; Noruega
Fil: Wiens, Douglas A.. Washington University in St. Louis; Estados Unidos
Fil: Richter, Andreas Jorg. 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
description The subduction of the Chile Ridge beneath South America beginning 12–16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46°S. Geodynamic processes associated with the slab window are poorly understood. Here we apply finite‐frequency P and SH body wave tomography to seismic data from several temporary arrays as well as regional stations to image seismic heterogeneities down to 650 km depth. The results show strong low velocity anomalies extending to 400 km depth beneath recent back‐arc volcanism between 46°S and 48°S, suggesting a link to thermal upwelling in the upper mantle. The southern edge of the Nazca slab extends aseismically down to at least 350 km. We also image low upper mantle seismic velocities beneath the Patagonia icefields, suggesting low viscosity modulates the patterns of uplift and horizontal deformation observed by GNSS.
publishDate 2025
dc.date.none.fl_str_mv 2025-08
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/11336/278929
Ben Mansour, Walid; Maupin, Valerie; Wiens, Douglas A.; Richter, Andreas Jorg; Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography; American Geophysical Union; Geophysical Research Letters; 52; 17; 8-2025; 1-11
0094-8276
CONICET Digital
CONICET
url http://hdl.handle.net/11336/278929
identifier_str_mv Ben Mansour, Walid; Maupin, Valerie; Wiens, Douglas A.; Richter, Andreas Jorg; Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography; American Geophysical Union; Geophysical Research Letters; 52; 17; 8-2025; 1-11
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/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115915
info:eu-repo/semantics/altIdentifier/doi/10.1029/2025GL115915
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv 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
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score 13.113929

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