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dc.contributor.author Kumar, Abhash
dc.contributor.author Wagner, Lara S.
dc.contributor.author Beck, Susan L.
dc.contributor.author Long, Maureen D.
dc.contributor.author Zandt, George
dc.contributor.author Young, Bissett
dc.contributor.author Tavera, Hernando
dc.contributor.author Minaya, Estella
dc.coverage.spatial Perú
dc.date.accessioned 2018-08-08T15:48:49Z
dc.date.available 2018-08-08T15:48:49Z
dc.date.issued 2016-05
dc.identifier.citation Kumar, A., Wagner, L. S., Beck, S. L., Long, M. D., Zandt, G., Young, B., ... Minaya, E. (2016). Seismicity and state of stress in the central and southern Peruvian flat slab.==$Earth and Planetary Science Letters, 441,$==71-80. https://doi.org/10.1016/j.epsl.2016.02.023 es_ES
dc.identifier.govdoc index-oti2018
dc.identifier.uri http://hdl.handle.net/20.500.12816/2316
dc.description.abstract We have determined the Wadati–Benioff Zone seismicity and state of stress of the subducting Nazca slab beneath central and southern Peru using data from three recently deployed local seismic networks. Our relocated hypocenters are consistent with a flat slab geometry that is shallowest near the Nazca Ridge, and changes from steep to normal without tearing to the south. These locations also indicate numerous abrupt along-strike changes in seismicity, most notably an absence of seismicity along the projected location of subducting Nazca Ridge. This stands in stark contrast to the very high seismicity observed along the Juan Fernandez ridge beneath central Chile where, a similar flat slab geometry is observed. We interpret this as indicative of an absence of water in the mantle beneath the overthickened crust of the Nazca Ridge. This may provide important new constraints on the conditions required to produce intermediate depth seismicity. Our focal mechanisms and stress tensor inversions indicate dominantly down-dip extension, consistent with slab pull, with minor variations that are likely due to the variable slab geometry and stress from adjacent regions. We observe significantly greater variability in the P-axis orientations and maximum compressive stress directions. The along strike change in the orientation of maximum compressive stress is likely related to slab bending and unbending south of the Nazca Ridge. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof urn:issn:0012-821X
dc.rights info:eu-repo/semantics/closedAccess es_ES
dc.subject Nazca plate es_ES
dc.subject Ridge buoyancy es_ES
dc.subject Subduction geometry es_ES
dc.subject Flat slab es_ES
dc.title Seismicity and state of stress in the central and southern Peruvian flat slab es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.00 es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.04 es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.06 es_ES
dc.identifier.journal Earth and Planetary Science Letters es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi https://doi.org/10.1016/j.epsl.2016.02.023 es_ES

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