Response of the mantle to flat slab evolution: insights from local S splitting beneath Peru

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dc.contributor.authorEakin, Caroline M.
dc.contributor.authorLong, Maureen D.
dc.contributor.authorBeck, Susan L.
dc.contributor.authorWagner, Lara S.
dc.contributor.authorTavera, Hernando
dc.contributor.authorCondori Quispe, Cristobal
dc.coverage.spatialPerú
dc.date.accessioned2018-09-11T19:32:39Z
dc.date.available2018-09-11T19:32:39Z
dc.date.issued2014-05-28
dc.description.abstractThe dynamics of flat subduction, particularly the interaction between a flat slab and the overriding plate, are poorly understood. Here we study the (seismically) anisotropic properties and deformational regime of the mantle directly above the Peruvian flat slab. We analyze shear wave splitting from 370 local S events at 49 stations across southern Peru. We find that the mantle above the flat slab appears to be anisotropic, with modest average delay times (~0.28 s) that are consistent with ~4% anisotropy in a ~30 km thick mantle layer. The most likely mechanism is the lattice‐preferred orientation of olivine, which suggests that the observed splitting pattern preserves information about the mantle deformation. We observe a pronounced change in anisotropy along strike, with predominately trench‐parallel fast directions in the north and more variable orientations in the south, which we attribute to the ongoing migration of the Nazca Ridge through the flat slab system.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationEakin, C. M., Long, M. D., Beck, S. L., Wagner, L. S., Tavera, H., & Condori, C. (2014). Response of the mantle to flat slab evolution: Insights from local S splitting beneath Peru.==$Geophysical Research Letters, 41$==(10), 3438-3446. https://doi.org/10.1002/2014GL059943es_ES
dc.identifier.doihttps://doi.org/10.1002/2014GL059943es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeophysical Research Letterses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2922
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:0094-8276
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectStructural geologyes_ES
dc.subjectSubductiones_ES
dc.subjectAnisotropíaes_ES
dc.subjectSeismic stationes_ES
dc.subjectMantlees_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.06es_ES
dc.titleResponse of the mantle to flat slab evolution: insights from local S splitting beneath Perues_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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