Ambient noise tomography across the Central Andes

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dc.contributor.authorWard, Kevin M.
dc.contributor.authorPorter, Ryan C.
dc.contributor.authorZandt, George
dc.contributor.authorBeck, Susan L.
dc.contributor.authorWagner, Lara S.
dc.contributor.authorMinaya, Estela
dc.contributor.authorTavera, Hernando
dc.coverage.spatialSudamérica
dc.date.accessioned2018-09-17T16:32:41Z
dc.date.available2018-09-17T16:32:41Z
dc.date.issued2013-09
dc.description.abstractThe Central Andes of southern Peru, Bolivia, Argentina and Chile (between 12°S and 42°S) comprise the largest orogenic plateau in the world associated with abundant arc volcanism, the Central Andean Plateau, as well as multiple segments of flat-slab subduction making this part of the Earth a unique place to study various aspects of active plate tectonics. The goal of this continental-scale ambient noise tomography study is to incorporate broad-band seismic data from 20 seismic networks deployed incrementally in the Central Andes from 1994 May to 2012 August, to image the vertically polarized shear wave velocity (Vsv) structure of the South American Cordillera. Using dispersion measurements calculated from the cross-correlation of 330 broad-band seismic stations, we construct Rayleigh wave phase velocity maps in the period range of 8–40 s and invert these for the shear wave velocity (Vsv) structure of the Andean crust. We provide a dispersion misfit map as well as uncertainty envelopes for our Vsv model and observe striking first-order correlations with our shallow results (∼5 km) and the morphotectonic provinces as well as subtler geological features indicating our results are robust. Our results reveal for the first time the full extent of the mid-crustal Andean low-velocity zone that we tentatively interpret as the signature of a very large volume Neogene batholith. This study demonstrates the efficacy of integrating seismic data from numerous regional broad-band seismic networks to approximate the high-resolution coverage previously only available though larger networks such as the EarthScope USArray Transportable Array in the United States.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationWard, K. M., Porter, R. C., Zandt, G., Beck, S. L., Wagner, L. S., Minaya, E., & Tavera, H. (2013). Ambient noise tomography across the Central Andes.==$Geophysical Journal International, 194,$==(3), 1559-1573. https://doi.org/10.1093/gji/ggt166es_ES
dc.identifier.doihttps://doi.org/10.1093/gji/ggt166es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeophysical Journal Internationales_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2971
dc.language.isoenges_ES
dc.publisherOxford University Presses_ES
dc.relation.ispartofurn:issn:0956-540X
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectInterferometryes_ES
dc.subjectSurface waves and free oscillationses_ES
dc.subjectSeismic tomographyes_ES
dc.subjectCrustal structurees_ES
dc.subjectSouth Americaes_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.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.06es_ES
dc.titleAmbient noise tomography across the Central Andeses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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