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dc.contributor.author Eakin, Caroline M.
dc.contributor.author Long, Maureen D.
dc.contributor.author Scire, Alissa
dc.contributor.author Beck, Susan L.
dc.contributor.author Wagner, Lara S.
dc.contributor.author Zandt, George
dc.contributor.author Tavera, Hernando
dc.date.accessioned 2018-08-08T15:22:16Z
dc.date.available 2018-08-08T15:22:16Z
dc.date.issued 2015-11-23
dc.identifier.govdoc index-oti2018
dc.identifier.govdoc index-oti2018 (NB)
dc.identifier.issn 14764687
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/2314
dc.description En: Nature Geoscience, v. 9 (2016), p. 56-59. es_ES
dc.description.abstract "Within oceanic lithosphere a fossilized fabric is often preserved originating from the time of plate formation. Such fabric is thought to form at the mid-ocean ridge when olivine crystals align with the direction of plate spreading1,2. It is unclear, however, whether this fossil fabric is preserved within slabs during subduction or overprinted by subduction-induced deformation. The alignment of olivine crystals, such as within fossil fabrics, can generate anisotropy that is sensed by passing seismic waves. Seismic anisotropy is therefore a useful tool for investigating the dynamics of subduction zones, but it has so far proved difficult to observe the anisotropic properties of the subducted slab itself. Here we analyse seismic anisotropy in the subducted Nazca slab beneath Peru and find that the fast direction of seismic wave propagation aligns with the contours of the slab. We use numerical modelling to simulate the olivine fabric created at the mid-ocean ridge, but find it is inconsistent with our observations of seismic anisotropy in the subducted Nazca slab. Instead we find that an orientation of the olivine crystal fast axes aligned parallel to the strike of the slab provides the best fit, consistent with along-strike extension induced by flattening of the slab during subduction (A. Kumar et al., manuscript in preparation). We conclude that the fossil fabric has been overprinted during subduction and that the Nazca slab must therefore be sufficiently weak to undergo internal deformation." es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Nature Research es_ES
dc.relation.uri https://www.nature.com/articles/ngeo2592?cacheBust=1507869358174 es_ES
dc.relation.uri https://www.nature.com/articles/ngeo2592?cacheBust=1507869358174 es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Placas tectónicas
dc.subject Placas (Geología) es_ES
dc.subject Anisotropía es_ES
dc.subject Zonas de subducción es_ES
dc.subject Geología estructural--Perú es_ES
dc.subject Litosfera es_ES
dc.subject Tierra (Planeta)--Estructura interna es_ES
dc.subject Geodinámica es_ES
dc.title Internal deformation of the subducted Nazca slab inferred from seismic anisotropy es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Estudios geofísicos es_ES
dc.subject.ocde Estudios de suelos es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Estudios geológicos es_ES
dc.subject.ocde Sismología es_ES
dc.subject.ocde Geomorfología es_ES
dc.identifier.journal Nature Geoscience es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1038/ngeo2592 es_ES

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