Mostrar el registro sencillo del ítem Antonijevic, Sanja Knezevic Wagner, Lara S. Beck, Susan L. Long, Maureen D. Zandt, George Tavera, Hernando 2018-08-09T17:16:14Z 2018-08-09T17:16:14Z 2016-10
dc.identifier.citation Antonijevic, S. K., Wagner, L. S., Beck, S. L., Long, M. D., Zandt, G., & Tavera, H. (2016). Effects of change in slab geometry on the mantle flow and slab fabric in Southern Peru.==$Journal of Geophysical Research: Solid Earth, 121$==(10), 7252-7270. es_ES
dc.identifier.govdoc index-oti2018
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.relation.ispartof urn:issn:2169-9313
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri es_ES
dc.subject Structural geology es_ES
dc.subject Subduction es_ES
dc.subject Mantle es_ES
dc.subject Tectonics es_ES
dc.subject Anisotropy es_ES
dc.subject Elastic waves es_ES
dc.subject Earth sciences 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 es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Journal of Geophysical Research: Solid Earth es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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