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dc.contributor.author
Mulcahy, Patrick
dc.contributor.author
Chen, Chen
dc.contributor.author
Kay, Suzanne M.
dc.contributor.author
Brown, Larry D.
dc.contributor.author
Isacks, Bryan L.
dc.contributor.author
Sandvol, Eric
dc.contributor.author
Heit, Benjamin
dc.contributor.author
Yuan, Xiaohui
dc.contributor.author
Coira, Beatriz Lidia Luisa
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dc.date.available
2018-02-07T13:41:55Z
dc.date.issued
2014-08
dc.identifier.citation
Mulcahy, Patrick; Chen, Chen; Kay, Suzanne M.; Brown, Larry D.; Isacks, Bryan L.; et al.; Central Andean mantle and crustal seismicity beneath the Southern Puna plateau and the northern margin of the Chilean-Pampean flat slab.; American Geophysical Union; Tectonics; 33; 8; 8-2014; 1636-1658
dc.identifier.issn
0278-7407
dc.identifier.uri
http://hdl.handle.net/11336/35932
dc.description.abstract
Earthquake hypocenters recorded in the Andean Southern Puna seismic array (25–28°S, 70–65°W) provide new constraints on the shape of the subducting Nazca plate beneath the Puna plateau, the transition into the Chilean-Pampean flat slab and the thermal state of the mantle and crust. Some 270 new mantle hypocenters suggest that the subducting slab under the Puna shoals into the flat-slab segment more abruptly and farther to the north than previously indicated. The revised geometry is consistent with the Central Volcanic Zone Incapillo caldera being the southernmost center with Pleistocene activity until reaching the southern side of the flat-slab region. Evidence for the revised slab geometry includes three well-defined hypocenter clusters in the Pipanaco nest (27.5–29°S, 68–66°W), which are interpreted to reflect slab-bending stresses. A few low-magnitude earthquakes with strongly attenuated S waves in the long-recognized Antofalla teleseismic gap (25.5–27.5°S) support a continuous slab under the Southern Puna. The paucity of gap earthquakes and the presence of mafic magmas are consistent with a hot mantle wedge reflecting recent lithospheric delamination. Evidence for a hot overlaying Puna crust comes from new crustal earthquake hypocenters concentrated at depths shallower than 5 km. Two notable short-duration swarms were recorded under the resurgent dome of the ~2 Ma back-arc Cerro Galán caldera and the near-arc Cerro Torta dome. New crustal earthquake focal mechanisms from 17 events in the array along with two existing mechanisms have strike slip, oblique reverse, and oblique normal solutions fitting with regional E-W compression and N-S extension.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Mantle And Crustal Earthquakes Under
dc.subject
Southern Puna Plateau
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Wadati-Benioff Zone Geometry
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Chilean-Pampean Flat Slab
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Central Andean mantle and crustal seismicity beneath the Southern Puna plateau and the northern margin of the Chilean-Pampean flat slab.
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-02-06T20:06:08Z
dc.journal.volume
33
dc.journal.number
8
dc.journal.pagination
1636-1658
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
New York
dc.description.fil
Fil: Mulcahy, Patrick. Cornell University; Estados Unidos. Shell Exploration Company. New Orleans; Estados Unidos
dc.description.fil
Fil: Chen, Chen. Cornell University; Estados Unidos. Shell Exploration Company. New Orleans; Estados Unidos
dc.description.fil
Fil: Kay, Suzanne M.. Cornell University; Estados Unidos
dc.description.fil
Fil: Brown, Larry D.. Cornell University; Estados Unidos
dc.description.fil
Fil: Isacks, Bryan L.. Cornell University; Estados Unidos
dc.description.fil
Fil: Sandvol, Eric. University of Missouri; Estados Unidos
dc.description.fil
Fil: Heit, Benjamin. Deutsches GeoForschungs; Alemania
dc.description.fil
Fil: Yuan, Xiaohui. Deutsches GeoForschungs; Alemania
dc.description.fil
Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Jujuy. Universidad Nacional de Jujuy. Centro de Investigaciones y Transferencia de Jujuy; Argentina
dc.journal.title
Tectonics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2013TC003393
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2013TC003393/abstract
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