Active tectonics of Peru: heterogeneous interseismic coupling along the Nazca megathrust, rigid motion of the Peruvian Sliver, and Subandean shortening accommodation

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dc.contributor.authorVillegas Lanza, Juan Carlos
dc.contributor.authorChlieh, Mohamed
dc.contributor.authorCavalié, O.
dc.contributor.authorTavera, Hernando
dc.contributor.authorBaby, P.
dc.contributor.authorChire Chira, J.
dc.contributor.authorNocquet, J.‐M.
dc.coverage.spatialPerú
dc.date.accessioned2018-08-10T16:50:27Z
dc.date.available2018-08-10T16:50:27Z
dc.date.issued2016-10
dc.description.abstractOver 100 GPS sites measured in 2008–2013 in Peru provide new insights into the present‐day crustal deformation of the 2200 km long Peruvian margin. This margin is squeezed between the eastward subduction of the oceanic Nazca Plate at the South America trench axis and the westward continental subduction of the South American Plate beneath the Eastern Cordillera and Subandean orogenic wedge. Continental active faults and GPS data reveal the rigid motion of a Peruvian Forearc Sliver that extends from the oceanic trench axis to the Western‐Eastern Cordilleras boundary and moves southeastward at 4–5 mm/yr relative to a stable South America reference frame. GPS data indicate that the Subandean shortening increases southward by 2 to 4 mm/yr. In a Peruvian Sliver reference frame, the residual GPS data indicate that the interseismic coupling along the Nazca megathrust is highly heterogeneous. Coupling in northern Peru is shallow and coincides with the site of previous moderate‐sized and shallow tsunami‐earthquakes. Deep coupling occurs in central and southern Peru, where repeated large and great megathrust earthquakes have occurred. The strong correlation between highly coupled areas and large ruptures suggests that seismic asperities are persistent features of the megathrust. Creeping segments appear at the extremities of great ruptures and where oceanic fracture zones and ridges enter the subduction zone, suggesting that these subducting structures play a major role in the seismic segmentation of the Peruvian margin. In central Peru, we estimate a recurrence time of 305 ± 40 years to reproduce the great 1746 Mw~8.8 Lima‐Callao earthquake.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationVillegas, J., Chlieh, M., Cavalié, O., Tavera, H., Baby, P., Chire-Chira, J., & Nocquet, J. (2016). Active tectonics of Peru: heterogeneous interseismic coupling along the Nazca megathrust, rigid motion of the Peruvian Sliver, and Subandean shortening accommodation.==$Journal of Geophysical research: Solid Earth, 121$==(10), 7371-7394. https://doi.org/10.1002/2016JB013080es_ES
dc.identifier.doihttps://doi.org/10.1002/2016JB013080es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Solid Earthes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2358
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9313
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectTectonicses_ES
dc.subjectTectonic platees_ES
dc.subjectDeformationes_ES
dc.subjectGlobal positioning systemes_ES
dc.subjectGeological faultses_ES
dc.subjectSubductiones_ES
dc.subjectEarthquakeses_ES
dc.subjectSeismologyes_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.titleActive tectonics of Peru: heterogeneous interseismic coupling along the Nazca megathrust, rigid motion of the Peruvian Sliver, and Subandean shortening accommodationes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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