Overriding plate, mantle wedge, slab, and subslab contributions to seismic anisotropy beneath the northern Central Andean Plateau

Simple item page
dc.contributor.authorLong, Maureen D.
dc.contributor.authorBiryol, C. Berk
dc.contributor.authorEakin, Caroline M.
dc.contributor.authorBeck, Susan L.
dc.contributor.authorWagner, Lara S.
dc.contributor.authorZandt, George
dc.contributor.authorMinaya, Estella
dc.contributor.authorTavera, Hernando
dc.date.accessioned2018-08-09T15:55:56Z
dc.date.available2018-08-09T15:55:56Z
dc.date.issued2016-07
dc.description.abstractThe Central Andean Plateau, the second‐highest plateau on Earth, overlies the subduction of the Nazca Plate beneath the central portion of South America. The origin of the high topography remains poorly understood, and this puzzle is intimately tied to unanswered questions about processes in the upper mantle, including possible removal of the overriding plate lithosphere and interaction with the flow field that results from the driving forces associated with subduction. Observations of seismic anisotropy can provide important constraints on mantle flow geometry in subduction systems. The interpretation of seismic anisotropy measurements in subduction settings can be challenging, however, because different parts of the subduction system may contribute, including the overriding plate, the mantle wedge above the slab, the slab itself, and the deep upper mantle beneath the slab. Here we present measurements of shear wave splitting for core phases (SKS, SKKS, PKS, and sSKS), local S, and source‐side teleseismic S phases that sample the upper mantle beneath southern Peru and northern Bolivia, relying mostly on data from the CAUGHT experiment. We find evidence for seismic anisotropy within most portions of the subduction system, although the overriding plate itself likely makes only a small contribution to the observed delay times. Average fast orientations generally trend roughly trench‐parallel to trench‐oblique, contradicting predictions from the simplest two‐dimensional flow models and olivine fabric scenarios. Our measurements suggest complex, layered anisotropy beneath the northern portion of the Central Andean Plateau, with significant departures from a two‐dimensional mantle flow regime.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationLong, M. D, Biryol, C. B., Eakin, C. M., Beck, S. L., Wagner, L. S., Zandt, G., ... Tavera, H. (2016). Overriding plate, mantle wedge, slab, and subslab contributions to seismic anisotropy beneath the northern Central Andean Plateau.==$Geochemistry, Geophysics, Geosystems, 17$==(7), 2556-2575. https://doi.org/10.1002/2016GC006316es_ES
dc.identifier.doihttps://doi.org/10.1002/2016GC006316es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeochemistry, Geophysics, Geosystemses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2346
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:1525-2027
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectSeismic anisotropyes_ES
dc.subjectSubduction zonees_ES
dc.subjectElastic waveses_ES
dc.subjectGeodynamicses_ES
dc.subjectMantlees_ES
dc.subjectTectonicses_ES
dc.subjectLithospherees_ES
dc.subjectStructural geologyes_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.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.06es_ES
dc.titleOverriding plate, mantle wedge, slab, and subslab contributions to seismic anisotropy beneath the northern Central Andean Plateaues_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
long2016.pdf
Size:
2.59 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Artículos Científicos