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 Pat...

Autores: Encinas, Alfonso; Folguera Telichevsky, Andres; Oliveros, Veronica; De Girolamo Del Mauro, Lizet; Tapia, Francisca; Riffo, Ricardo; Hervé, Francisco; Finger, Kenneth L.; Valencia, Victor A.; Gianni, Guido Martin; Alvarez Pontoriero, Orlando
Año de publicación: 2015
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: 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.
Fil: Encinas, Alfonso. Universidad de Concepción; Chile
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
Fil: Oliveros, Veronica. Universidad de Concepción; Chile
Fil: De Girolamo Del Mauro, Lizet. Universidad de Concepción; Chile
Fil: Tapia, Francisca. Universidad de Concepción; Chile
Fil: Riffo, Ricardo. Universidad de Concepción; Chile
Fil: Hervé, Francisco. Universidad de Chile; Chile. Universidad Andres Bello; Chile
Fil: Finger, Kenneth L.. University of California Berkeley; Estados Unidos
Fil: Valencia, Victor A.. Washington State University; Estados Unidos
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
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
Materia: Tectonica
Back Arc
Extension
Nivel de accesibilidad: acceso abierto
Condiciones de uso: https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
Institución: Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador: oai:ri.conicet.gov.ar:11336/21842

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network_name_str	CONICET Digital (CONICET)
spelling	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 AndesEncinas, AlfonsoFolguera Telichevsky, AndresOliveros, VeronicaDe Girolamo Del Mauro, LizetTapia, FranciscaRiffo, RicardoHervé, FranciscoFinger, Kenneth L.Valencia, Victor A.Gianni, Guido MartinAlvarez Pontoriero, OrlandoTectonicaBack ArcExtensionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The 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.Fil: Encinas, Alfonso. Universidad de Concepción; ChileFil: 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"; ArgentinaFil: Oliveros, Veronica. Universidad de Concepción; ChileFil: De Girolamo Del Mauro, Lizet. Universidad de Concepción; ChileFil: Tapia, Francisca. Universidad de Concepción; ChileFil: Riffo, Ricardo. Universidad de Concepción; ChileFil: Hervé, Francisco. Universidad de Chile; Chile. Universidad Andres Bello; ChileFil: Finger, Kenneth L.. University of California Berkeley; Estados UnidosFil: Valencia, Victor A.. Washington State University; Estados UnidosFil: 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"; ArgentinaFil: 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; ArgentinaGeological Society of America2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21842Encinas, 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; 807-8231943-2674CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1130/B31303.1info:eu-repo/semantics/altIdentifier/url/http://bulletin.geoscienceworld.org/content/128/5-6/807info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsabulletin/article-abstract/128/5-6/807/126305/late-oligocene-early-miocene-submarine-volcanism?redirectedFrom=fulltextinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:41Zoai:ri.conicet.gov.ar:11336/21842instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:35:42.035CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv	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
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
spellingShingle	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 Encinas, Alfonso Tectonica Back Arc Extension
title_short	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
title_full	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
title_fullStr	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
title_full_unstemmed	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
title_sort	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.creator.none.fl_str_mv	Encinas, Alfonso Folguera Telichevsky, Andres Oliveros, Veronica De Girolamo Del Mauro, Lizet Tapia, Francisca Riffo, Ricardo Hervé, Francisco Finger, Kenneth L. Valencia, Victor A. Gianni, Guido Martin Alvarez Pontoriero, Orlando
author	Encinas, Alfonso
author_facet	Encinas, Alfonso Folguera Telichevsky, Andres Oliveros, Veronica De Girolamo Del Mauro, Lizet Tapia, Francisca Riffo, Ricardo Hervé, Francisco Finger, Kenneth L. Valencia, Victor A. Gianni, Guido Martin Alvarez Pontoriero, Orlando
author_role	author
author2	Folguera Telichevsky, Andres Oliveros, Veronica De Girolamo Del Mauro, Lizet Tapia, Francisca Riffo, Ricardo Hervé, Francisco Finger, Kenneth L. Valencia, Victor A. Gianni, Guido Martin Alvarez Pontoriero, Orlando
author2_role	author author author author author author author author author author
dc.subject.none.fl_str_mv	Tectonica Back Arc Extension
topic	Tectonica Back Arc Extension
purl_subject.fl_str_mv	https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv	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. Fil: Encinas, Alfonso. Universidad de Concepción; Chile 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 Fil: Oliveros, Veronica. Universidad de Concepción; Chile Fil: De Girolamo Del Mauro, Lizet. Universidad de Concepción; Chile Fil: Tapia, Francisca. Universidad de Concepción; Chile Fil: Riffo, Ricardo. Universidad de Concepción; Chile Fil: Hervé, Francisco. Universidad de Chile; Chile. Universidad Andres Bello; Chile Fil: Finger, Kenneth L.. University of California Berkeley; Estados Unidos Fil: Valencia, Victor A.. Washington State University; Estados Unidos 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 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
description	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.
publishDate	2015
dc.date.none.fl_str_mv	2015-01
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/11336/21842 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 1943-2674 CONICET Digital CONICET
url	http://hdl.handle.net/11336/21842
identifier_str_mv	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 1943-2674 CONICET Digital CONICET
dc.language.none.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	info:eu-repo/semantics/altIdentifier/doi/10.1130/B31303.1 info:eu-repo/semantics/altIdentifier/url/http://bulletin.geoscienceworld.org/content/128/5-6/807 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
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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dc.publisher.none.fl_str_mv	Geological Society of America
publisher.none.fl_str_mv	Geological Society of America
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repository.mail.fl_str_mv	dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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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 Pat...

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