New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth
- Autores
- Spagnotto, Silvana Liz; Triep, Enrique Gaudencio; Giambiagi, Laura Beatriz; Nacif Suvire, Silvina Valeria; Alvarez Pontoriero, Orlando
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Between 33°-36°S, the Nazca plate subducts below South American plate with an angle of ~30°, and it is seismically active until ~200-280km depth. At 33.5°S, the seismicity decreases drastically at 120km depth, just below the volcanic arc. In this paper, we studied a pair of associated earthquakes located in the area where the frequency of seismicity changes. The hypocenters of the Mw=6.4, June 16th, 2000 and Mw=5.7 January 7th, 2003 earthquakes were found nearby, adjacent to the oceanic Moho, closely associated with each other. The slip on the plane of the 2000 event produced Coulomb stress changes on the fault plane of 2003, both westward dipping, with a variation from ~1bar near the hypocenter of the latter to ~0.1bars in the deepest part of the plane. The two earthquakes combined process describes a normal focal mechanism, which cuts through the crust and breaks the mantle, reaching depths of ~40km below the Moho.The composed fault plane of the 2000 and 2003 events corresponds to a west-dipping normal fault with strike and dip consistent with those of the outer ridge faults. Thus, these events could be related to a preexisting fault originated in that environment reactivated at depth.The slip on the composed fault plane is consistent with the bending produced by the slab pull. Dehydration could be associated to these events.
Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis; Argentina
Fil: Triep, Enrique Gaudencio. Universidad Nacional de San Juan; Argentina
Fil: Giambiagi, Laura Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina
Fil: Nacif Suvire, Silvina Valeria. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina - Materia
-
Coulomb Static Stress
Intermediate-Depth Seismicity
Outer-Rise Faults
Subducted Nazca Plate - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37903
Ver los metadatos del registro completo
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New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depthSpagnotto, Silvana LizTriep, Enrique GaudencioGiambiagi, Laura BeatrizNacif Suvire, Silvina ValeriaAlvarez Pontoriero, OrlandoCoulomb Static StressIntermediate-Depth SeismicityOuter-Rise FaultsSubducted Nazca PlateBetween 33°-36°S, the Nazca plate subducts below South American plate with an angle of ~30°, and it is seismically active until ~200-280km depth. At 33.5°S, the seismicity decreases drastically at 120km depth, just below the volcanic arc. In this paper, we studied a pair of associated earthquakes located in the area where the frequency of seismicity changes. The hypocenters of the Mw=6.4, June 16th, 2000 and Mw=5.7 January 7th, 2003 earthquakes were found nearby, adjacent to the oceanic Moho, closely associated with each other. The slip on the plane of the 2000 event produced Coulomb stress changes on the fault plane of 2003, both westward dipping, with a variation from ~1bar near the hypocenter of the latter to ~0.1bars in the deepest part of the plane. The two earthquakes combined process describes a normal focal mechanism, which cuts through the crust and breaks the mantle, reaching depths of ~40km below the Moho.The composed fault plane of the 2000 and 2003 events corresponds to a west-dipping normal fault with strike and dip consistent with those of the outer ridge faults. Thus, these events could be related to a preexisting fault originated in that environment reactivated at depth.The slip on the composed fault plane is consistent with the bending produced by the slab pull. Dehydration could be associated to these events.Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis; ArgentinaFil: Triep, Enrique Gaudencio. Universidad Nacional de San Juan; ArgentinaFil: Giambiagi, Laura Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; ArgentinaFil: Nacif Suvire, Silvina Valeria. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaPergamon-Elsevier Science Ltd2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37903Spagnotto, Silvana Liz; Triep, Enrique Gaudencio; Giambiagi, Laura Beatriz; Nacif Suvire, Silvina Valeria; Alvarez Pontoriero, Orlando; New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 58; 3-2015; 141-1470895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981114001679info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2014.12.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:28:56Zoai:ri.conicet.gov.ar:11336/37903instacron: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 10:28:56.854CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
title |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
spellingShingle |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth Spagnotto, Silvana Liz Coulomb Static Stress Intermediate-Depth Seismicity Outer-Rise Faults Subducted Nazca Plate |
title_short |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
title_full |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
title_fullStr |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
title_full_unstemmed |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
title_sort |
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth |
dc.creator.none.fl_str_mv |
Spagnotto, Silvana Liz Triep, Enrique Gaudencio Giambiagi, Laura Beatriz Nacif Suvire, Silvina Valeria Alvarez Pontoriero, Orlando |
author |
Spagnotto, Silvana Liz |
author_facet |
Spagnotto, Silvana Liz Triep, Enrique Gaudencio Giambiagi, Laura Beatriz Nacif Suvire, Silvina Valeria Alvarez Pontoriero, Orlando |
author_role |
author |
author2 |
Triep, Enrique Gaudencio Giambiagi, Laura Beatriz Nacif Suvire, Silvina Valeria Alvarez Pontoriero, Orlando |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Coulomb Static Stress Intermediate-Depth Seismicity Outer-Rise Faults Subducted Nazca Plate |
topic |
Coulomb Static Stress Intermediate-Depth Seismicity Outer-Rise Faults Subducted Nazca Plate |
dc.description.none.fl_txt_mv |
Between 33°-36°S, the Nazca plate subducts below South American plate with an angle of ~30°, and it is seismically active until ~200-280km depth. At 33.5°S, the seismicity decreases drastically at 120km depth, just below the volcanic arc. In this paper, we studied a pair of associated earthquakes located in the area where the frequency of seismicity changes. The hypocenters of the Mw=6.4, June 16th, 2000 and Mw=5.7 January 7th, 2003 earthquakes were found nearby, adjacent to the oceanic Moho, closely associated with each other. The slip on the plane of the 2000 event produced Coulomb stress changes on the fault plane of 2003, both westward dipping, with a variation from ~1bar near the hypocenter of the latter to ~0.1bars in the deepest part of the plane. The two earthquakes combined process describes a normal focal mechanism, which cuts through the crust and breaks the mantle, reaching depths of ~40km below the Moho.The composed fault plane of the 2000 and 2003 events corresponds to a west-dipping normal fault with strike and dip consistent with those of the outer ridge faults. Thus, these events could be related to a preexisting fault originated in that environment reactivated at depth.The slip on the composed fault plane is consistent with the bending produced by the slab pull. Dehydration could be associated to these events. Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis; Argentina Fil: Triep, Enrique Gaudencio. Universidad Nacional de San Juan; Argentina Fil: Giambiagi, Laura Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina Fil: Nacif Suvire, Silvina Valeria. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
description |
Between 33°-36°S, the Nazca plate subducts below South American plate with an angle of ~30°, and it is seismically active until ~200-280km depth. At 33.5°S, the seismicity decreases drastically at 120km depth, just below the volcanic arc. In this paper, we studied a pair of associated earthquakes located in the area where the frequency of seismicity changes. The hypocenters of the Mw=6.4, June 16th, 2000 and Mw=5.7 January 7th, 2003 earthquakes were found nearby, adjacent to the oceanic Moho, closely associated with each other. The slip on the plane of the 2000 event produced Coulomb stress changes on the fault plane of 2003, both westward dipping, with a variation from ~1bar near the hypocenter of the latter to ~0.1bars in the deepest part of the plane. The two earthquakes combined process describes a normal focal mechanism, which cuts through the crust and breaks the mantle, reaching depths of ~40km below the Moho.The composed fault plane of the 2000 and 2003 events corresponds to a west-dipping normal fault with strike and dip consistent with those of the outer ridge faults. Thus, these events could be related to a preexisting fault originated in that environment reactivated at depth.The slip on the composed fault plane is consistent with the bending produced by the slab pull. Dehydration could be associated to these events. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03 |
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/11336/37903 Spagnotto, Silvana Liz; Triep, Enrique Gaudencio; Giambiagi, Laura Beatriz; Nacif Suvire, Silvina Valeria; Alvarez Pontoriero, Orlando; New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 58; 3-2015; 141-147 0895-9811 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/37903 |
identifier_str_mv |
Spagnotto, Silvana Liz; Triep, Enrique Gaudencio; Giambiagi, Laura Beatriz; Nacif Suvire, Silvina Valeria; Alvarez Pontoriero, Orlando; New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 58; 3-2015; 141-147 0895-9811 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://www.sciencedirect.com/science/article/pii/S0895981114001679 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2014.12.002 |
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 application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
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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1844614294377857024 |
score |
13.070432 |