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dc.creatorSyracuse, Ellen M. 
dc.creatorMaceira, Monica 
dc.creatorPrieto, Germán A. 
dc.creatorZhang, Haijiang 
dc.creatorAmmon, Charles J. 
dc.date.accessioned2020-08-06T16:20:10Z
dc.date.available2020-08-06T16:20:10Z
dc.date.created2016-04-12
dc.identifier.issnISSN: 0012-821X
dc.identifier.issnEISSN: 1385-013X
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/25904
dc.description.abstractSubduction beneath the northernmost Andes in Colombia is complex. Based on seismicity distributions, multiple segments of slab appear to be subducting, and arc volcanism ceases north of 5° N. Here, we illuminate the subduction system through hypocentral relocations and Vp and Vs models resulting from the joint inversion of local body wave arrivals, surface wave dispersion measurements, and gravity data. The simultaneous use of multiple data types takes advantage of the differing sensitivities of each data type, resulting in velocity models that have improved resolution at both shallower and deeper depths than would result from traditional travel time tomography alone. The relocated earthquake dataset and velocity model clearly indicate a tear in the Nazca slab at 5° N, corresponding to a 250-km shift in slab seismicity and the termination of arc volcanism. North of this tear, the slab is flat, and it comprises slabs of two sources: the Nazca and Caribbean plates. The Bucaramanga nest, a small region of among the most intense intermediate-depth seismicity globally, is associated with the boundary between these two plates and possibly with a zone of melting or elevated water content, based on reduced Vp and increased Vp/Vs. We also use relocated seismicity to identify two new faults in the South American plate, one related to plate convergence and one highlighted by induced seismicity.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.relation.ispartofEarth and Planetary Science Letters, ISSN: 0012-821X;EISSN: 1385-013X Vol.444, No.15 (June 2016); pp.139-149
dc.relation.urihttps://www.sciencedirect.com/science/article/abs/pii/S0012821X16301455?via%3Dihub
dc.sourceEarth and Planetary Science Letters
dc.titleMultiple plates subducting beneath Colombia, as illuminated by seismicity and velocity from the joint inversion of seismic and gravity data
dc.typearticle
dc.publisherElsevier
dc.subject.keywordFlat-slab
dc.subject.keywordBucaramanga nest
dc.subject.keywordSlab tear
dc.subject.keywordBody wave
dc.subject.keywordSurface wave
dc.subject.keywordGravity
dc.rights.accesRightsinfo:eu-repo/semantics/restrictedAccess
dc.type.spaArtículo
dc.rights.accesoRestringido (Acceso a grupos específicos)
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doihttps://doi.org/10.1016/j.epsl.2016.03.050
dc.title.TranslatedTitleMúltiples placas que se subducen debajo de Colombia, iluminadas por la sismicidad y la velocidad de la inversión conjunta de datos sísmicos y de gravedad.
dc.relation.citationEndPage149
dc.relation.citationIssueNo. 15
dc.relation.citationStartPage139
dc.relation.citationTitleEarth and Planetary Science Letters
dc.relation.citationVolumeVol. 444


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