Mostrar el registro sencillo del ítem Knezevic Antonijevic, Sanja Wagner, Lara S. Beck, Susan L. Long, Maureen D. Zandt, George Tavera, Hernando 2018-08-09T17:16:14Z 2018-08-09T17:16:14Z 2016-09
dc.identifier.govdoc index-oti2018 (NB)
dc.identifier.issn 21699356
dc.description En: Journal of Geophysical Research: Solid Earth, v. 121, n. 10, (October 2016), p. 7252-7270. es_ES
dc.description.abstract "The effects of complex slab geometries on the surrounding mantle flow field are still poorly understood. Here we combine shear wave velocity structure with Rayleigh wave phase anisotropy to examine these effects in southern Peru, where the slab changes its geometry from steep to flat. To the south, where the slab subducts steeply, we find trench‐parallel anisotropy beneath the active volcanic arc that we attribute to the mantle wedge and/or upper portions of the subducting plate. Farther north, beneath the easternmost corner of the flat slab, we observe a pronounced low‐velocity anomaly. This anomaly is caused either by the presence of volatiles and/or flux melting that could result from southward directed, volatile‐rich subslab mantle flow or by increased temperature and/or decompression melting due to small‐scale vertical flow. We also find evidence for mantle flow through the tear north of the subducting Nazca Ridge. Finally, we observe anisotropy patterns associated with the fast velocity anomalies that reveal along strike variations in the slab's internal deformation. The change in slab geometry from steep to flat contorts the subducting plate south of the Nazca Ridge causing an alteration of the slab petrofabric. In contrast, the torn slab to the north still preserves the primary (fossilized) petrofabric first established shortly after plate formation." es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher American Geophysical Union es_ES
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Zonas de subducción es_ES
dc.subject Tierra (Planeta)--Manto es_ES
dc.subject Anisotropía es_ES
dc.subject Losas (Geología estructural) es_ES
dc.subject Placas (Geología) es_ES
dc.subject Placas tectónicas--Andes es_ES
dc.subject Perú--Geología--Observaciones es_ES
dc.title Effects of change in slab geometry on the mantle flow and slab fabric in Southern Peru es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Geología estructural es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Región andina es_ES
dc.subject.ocde Física de suelos es_ES
dc.subject.ocde Análisis de suelos es_ES
dc.subject.ocde Estudios geológicos es_ES
dc.identifier.journal Journal of Geophysical Research: Solid Earth es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1002/2016JB013064 es_ES




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