Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics

Autores
Fernández Paz, Lucía; Bechis, Florencia; Litvak, Vanesa Dafne; Echaurren Gonzalez, Andres; Encinas, Alfonso; Gonzalez, J.; Lucassen, Friedrich; Oliveros, Verónica; Valencia, Victor; Folguera Telichevsky, Andres
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
New geochemical and geochronological data reveal that late Oligocene-early Miocene time isa break point in the evolution of Andean magmatism. The Patagonian Andes registered theonset of arc volcanism since the late Eocene forming part of the El Maitén Belt, whosedevelopment was driven by the subduction of the Farallón/Nazca plates beneath the Andeanmargin (Rapela et al., 1988). New data indicate that during the Oligocene El Maitén Belt showa change from tholeiitic to calc-alkaline compositions, reflecting a more mature stage in arcevolution. Toward the early Miocene, Andean arc magmatism turned into basic tholeiitic lavaflows, which intercalate with marine deposits, suggesting their development under extensionaltectonics (e.g., Bechis et al., 2014). These rocks resemble E-MORB-like and OIB compositionswith primitive mantle sources, which strongly contrast with previous arc products. By this time,a global plate reorganization event would have caused an increase in convergence rates,accelerated roll back and a more orthogonal subduction geometry, triggering a widespreadmagmatism and the development of extensional basins in the upper plate (e.g., Fennell et al.,2018; Lonsdale, 2005; Muñoz et al., 2000). Records of volcanic associations with arc signatureduring the early Miocene can be found only in the western slope of the Andes, suggesting theretreat of the volcanic front toward the trench (e.g., Encinas et al., 2016; Muñoz et al., 2000).The proposed model suggests that slab rollback would have caused vigorous mantleconvection allowing the coexistence of arc related magmatism with deep-sourced intrusions.
Fil: Fernández Paz, Lucía. 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: Bechis, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio. Universidad Nacional de Río Negro. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentina
Fil: Litvak, Vanesa Dafne. 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: Echaurren Gonzalez, 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Encinas, Alfonso. Universidad de Concepción; Chile
Fil: Gonzalez, J.. Universidad de Concepción; Chile
Fil: Lucassen, Friedrich. Universitat Bremen; Alemania
Fil: Oliveros, Verónica. Universidad de Concepción; Chile
Fil: Valencia, Victor. Washington State University; Estados Unidos
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
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
Materia
Patagonian magmatism
mantle dynamics
subduction zone magmatism
Cenozoic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/222670
Acceder
id CONICETDig_52d7cb2ec9b9f141eed49586210f7dba
oai_identifier_str oai:ri.conicet.gov.ar:11336/222670
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamicsFernández Paz, LucíaBechis, FlorenciaLitvak, Vanesa DafneEchaurren Gonzalez, AndresEncinas, AlfonsoGonzalez, J.Lucassen, FriedrichOliveros, VerónicaValencia, VictorFolguera Telichevsky, AndresPatagonian magmatismmantle dynamicssubduction zone magmatismCenozoichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1New geochemical and geochronological data reveal that late Oligocene-early Miocene time isa break point in the evolution of Andean magmatism. The Patagonian Andes registered theonset of arc volcanism since the late Eocene forming part of the El Maitén Belt, whosedevelopment was driven by the subduction of the Farallón/Nazca plates beneath the Andeanmargin (Rapela et al., 1988). New data indicate that during the Oligocene El Maitén Belt showa change from tholeiitic to calc-alkaline compositions, reflecting a more mature stage in arcevolution. Toward the early Miocene, Andean arc magmatism turned into basic tholeiitic lavaflows, which intercalate with marine deposits, suggesting their development under extensionaltectonics (e.g., Bechis et al., 2014). These rocks resemble E-MORB-like and OIB compositionswith primitive mantle sources, which strongly contrast with previous arc products. By this time,a global plate reorganization event would have caused an increase in convergence rates,accelerated roll back and a more orthogonal subduction geometry, triggering a widespreadmagmatism and the development of extensional basins in the upper plate (e.g., Fennell et al.,2018; Lonsdale, 2005; Muñoz et al., 2000). Records of volcanic associations with arc signatureduring the early Miocene can be found only in the western slope of the Andes, suggesting theretreat of the volcanic front toward the trench (e.g., Encinas et al., 2016; Muñoz et al., 2000).The proposed model suggests that slab rollback would have caused vigorous mantleconvection allowing the coexistence of arc related magmatism with deep-sourced intrusions.Fil: Fernández Paz, Lucía. 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: Bechis, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio. Universidad Nacional de Río Negro. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; ArgentinaFil: Litvak, Vanesa Dafne. 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: Echaurren Gonzalez, 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaFil: Encinas, Alfonso. Universidad de Concepción; ChileFil: Gonzalez, J.. Universidad de Concepción; ChileFil: Lucassen, Friedrich. Universitat Bremen; AlemaniaFil: Oliveros, Verónica. Universidad de Concepción; ChileFil: Valencia, Victor. Washington State University; Estados UnidosFil: 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"; Argentina8th International Symposium on Andean GeodynamicsQuitoEcuadorEscuela Politécnica NacionalInstitut de Recherche pour le DéveloppementInternational Society for Animal Genetics2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/222670Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-2CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/8isag-abstracts/magmatism/22760-fernandez-paz-etal/fileInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:50:00Zoai:ri.conicet.gov.ar:11336/222670instacron: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:34982025-09-03 09:50:00.75CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
title Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
spellingShingle Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
Fernández Paz, Lucía
Patagonian magmatism
mantle dynamics
subduction zone magmatism
Cenozoic
title_short Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
title_full Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
title_fullStr Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
title_full_unstemmed Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
title_sort Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics
dc.creator.none.fl_str_mv Fernández Paz, Lucía
Bechis, Florencia
Litvak, Vanesa Dafne
Echaurren Gonzalez, Andres
Encinas, Alfonso
Gonzalez, J.
Lucassen, Friedrich
Oliveros, Verónica
Valencia, Victor
Folguera Telichevsky, Andres
author Fernández Paz, Lucía
author_facet Fernández Paz, Lucía
Bechis, Florencia
Litvak, Vanesa Dafne
Echaurren Gonzalez, Andres
Encinas, Alfonso
Gonzalez, J.
Lucassen, Friedrich
Oliveros, Verónica
Valencia, Victor
Folguera Telichevsky, Andres
author_role author
author2 Bechis, Florencia
Litvak, Vanesa Dafne
Echaurren Gonzalez, Andres
Encinas, Alfonso
Gonzalez, J.
Lucassen, Friedrich
Oliveros, Verónica
Valencia, Victor
Folguera Telichevsky, Andres
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Patagonian magmatism
mantle dynamics
subduction zone magmatism
Cenozoic
topic Patagonian magmatism
mantle dynamics
subduction zone magmatism
Cenozoic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv New geochemical and geochronological data reveal that late Oligocene-early Miocene time isa break point in the evolution of Andean magmatism. The Patagonian Andes registered theonset of arc volcanism since the late Eocene forming part of the El Maitén Belt, whosedevelopment was driven by the subduction of the Farallón/Nazca plates beneath the Andeanmargin (Rapela et al., 1988). New data indicate that during the Oligocene El Maitén Belt showa change from tholeiitic to calc-alkaline compositions, reflecting a more mature stage in arcevolution. Toward the early Miocene, Andean arc magmatism turned into basic tholeiitic lavaflows, which intercalate with marine deposits, suggesting their development under extensionaltectonics (e.g., Bechis et al., 2014). These rocks resemble E-MORB-like and OIB compositionswith primitive mantle sources, which strongly contrast with previous arc products. By this time,a global plate reorganization event would have caused an increase in convergence rates,accelerated roll back and a more orthogonal subduction geometry, triggering a widespreadmagmatism and the development of extensional basins in the upper plate (e.g., Fennell et al.,2018; Lonsdale, 2005; Muñoz et al., 2000). Records of volcanic associations with arc signatureduring the early Miocene can be found only in the western slope of the Andes, suggesting theretreat of the volcanic front toward the trench (e.g., Encinas et al., 2016; Muñoz et al., 2000).The proposed model suggests that slab rollback would have caused vigorous mantleconvection allowing the coexistence of arc related magmatism with deep-sourced intrusions.
Fil: Fernández Paz, Lucía. 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: Bechis, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio. Universidad Nacional de Río Negro. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentina
Fil: Litvak, Vanesa Dafne. 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: Echaurren Gonzalez, 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Encinas, Alfonso. Universidad de Concepción; Chile
Fil: Gonzalez, J.. Universidad de Concepción; Chile
Fil: Lucassen, Friedrich. Universitat Bremen; Alemania
Fil: Oliveros, Verónica. Universidad de Concepción; Chile
Fil: Valencia, Victor. Washington State University; Estados Unidos
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
8th International Symposium on Andean Geodynamics
Quito
Ecuador
Escuela Politécnica Nacional
Institut de Recherche pour le Développement
description New geochemical and geochronological data reveal that late Oligocene-early Miocene time isa break point in the evolution of Andean magmatism. The Patagonian Andes registered theonset of arc volcanism since the late Eocene forming part of the El Maitén Belt, whosedevelopment was driven by the subduction of the Farallón/Nazca plates beneath the Andeanmargin (Rapela et al., 1988). New data indicate that during the Oligocene El Maitén Belt showa change from tholeiitic to calc-alkaline compositions, reflecting a more mature stage in arcevolution. Toward the early Miocene, Andean arc magmatism turned into basic tholeiitic lavaflows, which intercalate with marine deposits, suggesting their development under extensionaltectonics (e.g., Bechis et al., 2014). These rocks resemble E-MORB-like and OIB compositionswith primitive mantle sources, which strongly contrast with previous arc products. By this time,a global plate reorganization event would have caused an increase in convergence rates,accelerated roll back and a more orthogonal subduction geometry, triggering a widespreadmagmatism and the development of extensional basins in the upper plate (e.g., Fennell et al.,2018; Lonsdale, 2005; Muñoz et al., 2000). Records of volcanic associations with arc signatureduring the early Miocene can be found only in the western slope of the Andes, suggesting theretreat of the volcanic front toward the trench (e.g., Encinas et al., 2016; Muñoz et al., 2000).The proposed model suggests that slab rollback would have caused vigorous mantleconvection allowing the coexistence of arc related magmatism with deep-sourced intrusions.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Simposio
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/222670
Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-2
CONICET Digital
CONICET
url http://hdl.handle.net/11336/222670
identifier_str_mv Variable magmatic features of Oligocene-early Miocene Patagonian magmatism as result of subduction-induced mantle dynamics; 8th International Symposium on Andean Geodynamics; Quito; Ecuador; 2019; 1-2
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.igepn.edu.ec/8isag-abstracts/magmatism/22760-fernandez-paz-etal/file
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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rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv International Society for Animal Genetics
publisher.none.fl_str_mv International Society for Animal Genetics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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