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dc.contributor.author
Spagnotto, Silvana Liz
dc.contributor.author
Triep, Enrique Gaudencio
dc.contributor.author
Giambiagi, Laura Beatriz
dc.contributor.author
Nacif Suvire, Silvina Valeria
dc.contributor.author
Alvarez Pontoriero, Orlando
dc.date.available
2018-03-05T20:23:49Z
dc.date.issued
2015-03
dc.identifier.citation
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
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/37903
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Coulomb Static Stress
dc.subject
Intermediate-Depth Seismicity
dc.subject
Outer-Rise Faults
dc.subject
Subducted Nazca Plate
dc.title
New evidences of rupture of crust and mantle in the subducted Nazca plate at intermediate-depth
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-02T14:24:29Z
dc.journal.volume
58
dc.journal.pagination
141-147
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Spagnotto, Silvana Liz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis; Argentina
dc.description.fil
Fil: Triep, Enrique Gaudencio. Universidad Nacional de San Juan; Argentina
dc.description.fil
Fil: Giambiagi, Laura Beatriz. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina
dc.description.fil
Fil: Nacif Suvire, Silvina Valeria. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of South American Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981114001679
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2014.12.002
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