Structure of the subduction system in southern Peru from seismic array data

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dc.contributor.authorPhillips, Kristin
dc.contributor.authorClayton, Robert W.
dc.contributor.authorDavis, Paul
dc.contributor.authorTavera, Hernando
dc.contributor.authorGuy, Richard
dc.contributor.authorSkinner, Steven
dc.contributor.authorStubailo, Igor
dc.contributor.authorAudin, Laurence
dc.contributor.authorAguilar, Victor
dc.coverage.spatialPerú
dc.date.accessioned2018-07-25T13:30:47Z
dc.date.available2018-07-25T13:30:47Z
dc.date.issued2012-11-28
dc.description.abstractThe subduction zone in southern Peru is imaged using converted phases from teleseismic P, PP, and PKP waves and P wave tomography using local and teleseismic events with a linear array of 50 broadband seismic stations spanning 300 km from the coast to near Lake Titicaca. The slab dips at 30° and can be observed to a depth of over 200 km. The Moho is seen as a continuous interface along the profile, and the crustal thickness in the back-arc region (the Altiplano) is 75 km thick, which is sufficient to isostatically support the Andes, as evidenced by the gravity. The shallow crust has zones of negative impedance at a depth of 20 km, which is likely the result of volcanism. At the midcrustal level of 40 km, there is a continuous structure with a positive impedance contrast, which we interpret as the western extent of the Brazilian Craton as it underthrusts to the west. Vp/Vs ratios estimated from receiver function stacks show average values for this region with a few areas of elevated Vp/Vs near the volcanic arc and at a few points in the Altiplano. The results support a model of crustal thickening in which the margin crust is underthrust by the Brazilian Shield.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationPhillips, K., Clayton, R. W., Davis, P., Tavera, H., Guy, R., Skinner, S., ... Aguilar, V. (2012). Structure of the subduction system in southern Peru from seismic array data.==$Journal of Geophysical Research: Solid Earth, 117$==(B11), B11306. https://doi.org/10.1029/2012JB009540es_ES
dc.identifier.doihttps://doi.org/10.1029/2012JB009540es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Solid Earthes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2081
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9313
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectSubductiones_ES
dc.subjectReceiver functionses_ES
dc.subjectLithospherees_ES
dc.subjectElastic waveses_ES
dc.subjectSeismic stationes_ES
dc.subjectSeismologyes_ES
dc.subjectEarth scienceses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.04es_ES
dc.titleStructure of the subduction system in southern Peru from seismic array dataes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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