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dc.contributor.author
Encinas, Alfonso  
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Folguera Telichevsky, Andres  
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Oliveros, Veronica  
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De Girolamo Del Mauro, Lizet  
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Tapia, Francisca  
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Riffo, Ricardo  
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Hervé, Francisco  
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Finger, Kenneth L.  
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Valencia, Victor A.  
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Gianni, Guido Martin  
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Alvarez Pontoriero, Orlando  
dc.date.available
2017-08-03T20:48:58Z  
dc.date.issued
2015-01  
dc.identifier.citation
Encinas, Alfonso; Folguera Telichevsky, Andres; Oliveros, Veronica; De Girolamo Del Mauro, Lizet; Tapia, Francisca; et al.; Late Oligocene–early Miocene submarine volcanism and deep-marine sedimentation in an extensional basin of southern Chile: Implications for the tectonic development of the North Patagonian Andes; Geological Society of America; Geological Society Of America Bulletin; 128; 5-6; 1-2015; 807-823  
dc.identifier.issn
1943-2674  
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http://hdl.handle.net/11336/21842  
dc.description.abstract
The Chilean margin has been used as the model of an ocean-continent convergent system dominated by compression and active mountain building as a consequence of the strong mechanical coupling between the upper and the lower plates. The Andean Cordillera, however, shows evidence of alternating phases of compressional and extensional deformation. Volcano-sedimentary marine strata in the Aysén region of southern Chile contribute to an understanding of the causes of extensional tectonics and crustal thinning that occurred in the Andean orogeny because these deposits constitute the only reliable record of submarine suprasubduction volcanism during the Cenozoic in southern South America. In order to discern the age and tectono-sedimentary setting of these strata, referred to as the Traiguén Formation, we integrated sedimentology, ichnology, petrography, geochemistry, structural geology, foraminiferal micropaleontology, and U-Pb geochronology. Our results indicate that the Traiguén Formation was deposited in a deep-marine extensional basin during the late Oligocene–earliest Miocene. The geochemistry and petrography of the pillow basalts suggest that they formed in a convergent margin on a thinned crust rather than at an oceanic spreading center. We atribute the origin of the Traiguén Basin to a transient period of slab rollback and vigorous asthenospheric wedge circulation that was caused by an increase in trench-normal convergence rate at ca. 26–28 Ma and that resulted in a regional event of extension and widespread volcanism.  
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application/pdf  
dc.language.iso
eng  
dc.publisher
Geological Society of America  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Tectonica  
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Back Arc  
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Extension  
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Geología  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Late Oligocene–early Miocene submarine volcanism and deep-marine sedimentation in an extensional basin of southern Chile: Implications for the tectonic development of the North Patagonian Andes  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
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info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-06-19T17:27:33Z  
dc.journal.volume
128  
dc.journal.number
5-6  
dc.journal.pagination
807-823  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Encinas, Alfonso. Universidad de Concepción; Chile  
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Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina  
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Fil: Oliveros, Veronica. Universidad de Concepción; Chile  
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Fil: De Girolamo Del Mauro, Lizet. Universidad de Concepción; Chile  
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Fil: Tapia, Francisca. Universidad de Concepción; Chile  
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Fil: Riffo, Ricardo. Universidad de Concepción; Chile  
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Fil: Hervé, Francisco. Universidad de Chile; Chile. Universidad Andres Bello; Chile  
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Fil: Finger, Kenneth L.. University of California Berkeley; Estados Unidos  
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Fil: Valencia, Victor A.. Washington State University; Estados Unidos  
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Fil: Gianni, Guido Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina  
dc.description.fil
Fil: Alvarez Pontoriero, Orlando. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.journal.title
Geological Society Of America Bulletin  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/B31303.1  
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info:eu-repo/semantics/altIdentifier/url/http://bulletin.geoscienceworld.org/content/128/5-6/807  
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info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsabulletin/article-abstract/128/5-6/807/126305/late-oligocene-early-miocene-submarine-volcanism?redirectedFrom=fulltext