Mostrar el registro sencillo del ítem Kumar, Abhash Wagner, Lara S. Beck, Susan L. Long, Maureen D. Zandt, George Young, Bissett Tavera, Hernando Estella Minaya 2018-08-08T15:48:49Z 2018-08-08T15:48:49Z 2016-05
dc.identifier.govdoc index-oti2018
dc.identifier.issn 1385013X
dc.description En: Earth and Planetary Science Letters, v. 441, (May 2016), p. 71-80. es_ES
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.uri 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--Andes es_ES
dc.subject Geología--Andes es_ES
dc.subject Zonas de subducción es_ES
dc.subject Losas (Geología estructural) es_ES
dc.subject Tierra (Planeta)--Manto 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 Perú es_ES
dc.subject.ocde Sismología es_ES
dc.subject.ocde Geología estructural es_ES
dc.subject.ocde Física de suelos es_ES
dc.subject.ocde Región andina es_ES
dc.identifier.journal Earth and Planetary Science Letters es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1016/j.epsl.2016.02.023 es_ES




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