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dc.contributor.author
Portner, Daniel Evan
dc.contributor.author
Rodríguez, Emily E.
dc.contributor.author
Beck, Susan
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Zandt, George
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Scire, Alissa
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Rocha, Marcelo P.
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Bianchi, Marcelo B.
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Ruiz, Mario
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França, George Sand
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Condori, Cristobal
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Alvarado, Patricia Monica
dc.date.available
2021-10-16T13:29:20Z
dc.date.issued
2020-05
dc.identifier.citation
Portner, Daniel Evan; Rodríguez, Emily E.; Beck, Susan; Zandt, George; Scire, Alissa; et al.; Detailed Structure of the Subducted Nazca Slab into the Lower Mantle Derived From Continent-Scale Teleseismic P Wave Tomography; Blackwell Publishing; Journal of Geophysical Research; 125; 5; 5-2020; 1-26
dc.identifier.issn
2169-9313
dc.identifier.uri
http://hdl.handle.net/11336/143980
dc.description.abstract
Nazca subduction beneath South America is one of our best modern examples of long-lived ocean-continent subduction on the planet, serving as a foundation for our understanding of subduction processes. Within that framework, persistent heterogeneities at a range of scales in both the South America and Nazca plates is difficult to reconcile without detailed knowledge of the subducted Nazca slab structure. Here we use teleseismic travel time residuals from >1,000 broadband and short-period seismic stations across South America in a single tomographic inversion to produce the highest-resolution contiguous P wave tomography model of the subducting slab and surrounding mantle beneath South America to date. Our model reveals a continuous trench-parallel fast seismic velocity anomaly across the majority of South America that is consistent with the subducting Nazca slab. The imaged anomaly indicates a number of robust features of the subducted slab, including variable slab dip, extensive lower mantle penetration, slab stagnation in the lower mantle, and variable slab amplitude, that are incorporated into a new, comprehensive model of the geometry of the Nazca slab surface to ~1,100 km depth. Lower mantle slab penetration along the entire margin suggests that lower mantle slab anchoring is insufficient to explain along strike upper plate variability while slab stagnation in the lower mantle indicates that the 1,000 km discontinuity is dominant beneath South America.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Blackwell Publishing
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MANTLE TRANSITION ZONE
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NAZCA SLAB
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SEISMIC IMAGING
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SOUTH AMERICA
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SUBDUCTION DYNAMICS
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TELESEISMIC TOMOGRAPHY
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Geoquímica y Geofísica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Detailed Structure of the Subducted Nazca Slab into the Lower Mantle Derived From Continent-Scale Teleseismic P Wave Tomography
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-04-28T20:34:53Z
dc.identifier.eissn
2169-9356
dc.journal.volume
125
dc.journal.number
5
dc.journal.pagination
1-26
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Portner, Daniel Evan. University of Arizona; Estados Unidos. Carnegie Institution Of Washington; Estados Unidos
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Fil: Rodríguez, Emily E.. University of Arizona; Estados Unidos
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Fil: Beck, Susan. University of Arizona; Estados Unidos
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Fil: Zandt, George. University of Arizona; Estados Unidos
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Fil: Scire, Alissa. New Mexico Institute of Mining and Technology; Estados Unidos
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Fil: Rocha, Marcelo P.. Universidade do Brasília; Brasil
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Fil: Bianchi, Marcelo B.. Universidade de Sao Paulo; Brasil
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Fil: Ruiz, Mario. Escuela Politécnica Nacional; Ecuador
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Fil: França, George Sand. Universidade do Brasília; Brasil
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Fil: Condori, Cristobal. Universidade do Brasília; Brasil
dc.description.fil
Fil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
dc.journal.title
Journal of Geophysical Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2019JB017884
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JB017884
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