Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes

Autores
Litvak, Vanesa Dafne; Iannelli, Sofía; Fernández Paz, Lucía; Poma, Stella Maris; Folguera Telichevsky, Andres
Año de publicación
2018
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Geochemical variations in arc-related magmas allow correlating their magmatic evolution with changes in the geodynamic context of the Andean subduction zone. This work focuses on Cenozoic times, comparing geochemical evolution of arc-related products through different Andean segments, including those located both in a frontal and in a retroarc position, together with alkaline retroarc volcanism associated with arc dynamics. During Paleocene to middle Eocene arc magmatism along the Southern Central Andes was constrained to the volcanic front and showed variable slab input. On the contrary, in the North Patagonian Andes, intraplate alkaline-like magmas are registered in the retroarc zone. By late Eocene to middle Oligocene times, low volumes of arc volcanism were erupted along the Andes with mostly tholeiitic composition. Arc volcanism changed to a more typical tholeiitic to calc-alkaline Andean-type by late Oligocene in the Southern Central Andes, associated with the breakup of the Farallón plate; meanwhile, arc-derived magmas in North Patagonia still showed mostly tholeiitic composition. Arc magmatism by Miocene to middle Pliocene times in Southern Central Andes show typical calc-alkaline features, while arc-derived products were expanded to the east, associated with a progressive shallow subduction regime, developed both in the present-day Pampean-Chilean flat- slab segment (∽28°-33°S) and the late Miocene Payenia shallow subduction segment (∽33°-38°S). Particularly in the Pampean- Chilean segment, middle Miocene to late Miocene arc rocks show trace elements, and Sr, Nd whole-rock isotopic ratios and in-situ Hf and O isotopic composition that display a trend towards an increase of crustal contributions, either by assimilation during magma ascent through a thick crust or linked to forearc subduction erosion and/or sediment contributions into the mantle wedge. Coeval arc magmatism in North Patagonia also showed calc-alkaline geochemical features but was mainly spatially restricted to the main Andean axis. Overall, geochemical evolution of Cenozoic arc magmas reflects the direct influence of the variable geodynamic parameters along Southern Central and North Patagonian Andes.
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: Iannelli, Sofía. 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: 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: Poma, Stella Maris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
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
XV Congreso Geológico Chileno
Concepción
Chile
Universidad de Concepción
Colegio de Geólogos
Sociedad Geológica de Chile
Materia
Cenozoic
arc-related volcanism
Andes
magmatic evolution
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:11336/228611
Acceder
id CONICETDig_4ae31d51f4608f492809ffb20884c199
oai_identifier_str oai:ri.conicet.gov.ar:11336/228611
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian AndesLitvak, Vanesa DafneIannelli, SofíaFernández Paz, LucíaPoma, Stella MarisFolguera Telichevsky, AndresCenozoicarc-related volcanismAndesmagmatic evolutionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Geochemical variations in arc-related magmas allow correlating their magmatic evolution with changes in the geodynamic context of the Andean subduction zone. This work focuses on Cenozoic times, comparing geochemical evolution of arc-related products through different Andean segments, including those located both in a frontal and in a retroarc position, together with alkaline retroarc volcanism associated with arc dynamics. During Paleocene to middle Eocene arc magmatism along the Southern Central Andes was constrained to the volcanic front and showed variable slab input. On the contrary, in the North Patagonian Andes, intraplate alkaline-like magmas are registered in the retroarc zone. By late Eocene to middle Oligocene times, low volumes of arc volcanism were erupted along the Andes with mostly tholeiitic composition. Arc volcanism changed to a more typical tholeiitic to calc-alkaline Andean-type by late Oligocene in the Southern Central Andes, associated with the breakup of the Farallón plate; meanwhile, arc-derived magmas in North Patagonia still showed mostly tholeiitic composition. Arc magmatism by Miocene to middle Pliocene times in Southern Central Andes show typical calc-alkaline features, while arc-derived products were expanded to the east, associated with a progressive shallow subduction regime, developed both in the present-day Pampean-Chilean flat- slab segment (∽28°-33°S) and the late Miocene Payenia shallow subduction segment (∽33°-38°S). Particularly in the Pampean- Chilean segment, middle Miocene to late Miocene arc rocks show trace elements, and Sr, Nd whole-rock isotopic ratios and in-situ Hf and O isotopic composition that display a trend towards an increase of crustal contributions, either by assimilation during magma ascent through a thick crust or linked to forearc subduction erosion and/or sediment contributions into the mantle wedge. Coeval arc magmatism in North Patagonia also showed calc-alkaline geochemical features but was mainly spatially restricted to the main Andean axis. Overall, geochemical evolution of Cenozoic arc magmas reflects the direct influence of the variable geodynamic parameters along Southern Central and North Patagonian Andes.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"; ArgentinaFil: Iannelli, Sofía. 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: 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: Poma, Stella Maris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: 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"; ArgentinaXV Congreso Geológico ChilenoConcepciónChileUniversidad de ConcepciónColegio de GeólogosSociedad Geológica de ChileUniversidad de Concepción2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228611Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 852-852CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://congresogeologicochileno.cl/wp-content/uploads/2018/12/Libro-de-Actas-XVCongresoGeologicoChileno2018-2.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:17:29Zoai:ri.conicet.gov.ar:11336/228611instacron: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:34982025-10-22 12:17:30.292CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
title Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
spellingShingle Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
Litvak, Vanesa Dafne
Cenozoic
arc-related volcanism
Andes
magmatic evolution
title_short Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
title_full Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
title_fullStr Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
title_full_unstemmed Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
title_sort Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes
dc.creator.none.fl_str_mv Litvak, Vanesa Dafne
Iannelli, Sofía
Fernández Paz, Lucía
Poma, Stella Maris
Folguera Telichevsky, Andres
author Litvak, Vanesa Dafne
author_facet Litvak, Vanesa Dafne
Iannelli, Sofía
Fernández Paz, Lucía
Poma, Stella Maris
Folguera Telichevsky, Andres
author_role author
author2 Iannelli, Sofía
Fernández Paz, Lucía
Poma, Stella Maris
Folguera Telichevsky, Andres
author2_role author
author
author
author
dc.subject.none.fl_str_mv Cenozoic
arc-related volcanism
Andes
magmatic evolution
topic Cenozoic
arc-related volcanism
Andes
magmatic evolution
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Geochemical variations in arc-related magmas allow correlating their magmatic evolution with changes in the geodynamic context of the Andean subduction zone. This work focuses on Cenozoic times, comparing geochemical evolution of arc-related products through different Andean segments, including those located both in a frontal and in a retroarc position, together with alkaline retroarc volcanism associated with arc dynamics. During Paleocene to middle Eocene arc magmatism along the Southern Central Andes was constrained to the volcanic front and showed variable slab input. On the contrary, in the North Patagonian Andes, intraplate alkaline-like magmas are registered in the retroarc zone. By late Eocene to middle Oligocene times, low volumes of arc volcanism were erupted along the Andes with mostly tholeiitic composition. Arc volcanism changed to a more typical tholeiitic to calc-alkaline Andean-type by late Oligocene in the Southern Central Andes, associated with the breakup of the Farallón plate; meanwhile, arc-derived magmas in North Patagonia still showed mostly tholeiitic composition. Arc magmatism by Miocene to middle Pliocene times in Southern Central Andes show typical calc-alkaline features, while arc-derived products were expanded to the east, associated with a progressive shallow subduction regime, developed both in the present-day Pampean-Chilean flat- slab segment (∽28°-33°S) and the late Miocene Payenia shallow subduction segment (∽33°-38°S). Particularly in the Pampean- Chilean segment, middle Miocene to late Miocene arc rocks show trace elements, and Sr, Nd whole-rock isotopic ratios and in-situ Hf and O isotopic composition that display a trend towards an increase of crustal contributions, either by assimilation during magma ascent through a thick crust or linked to forearc subduction erosion and/or sediment contributions into the mantle wedge. Coeval arc magmatism in North Patagonia also showed calc-alkaline geochemical features but was mainly spatially restricted to the main Andean axis. Overall, geochemical evolution of Cenozoic arc magmas reflects the direct influence of the variable geodynamic parameters along Southern Central and North Patagonian Andes.
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: Iannelli, Sofía. 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: 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: Poma, Stella Maris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
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
XV Congreso Geológico Chileno
Concepción
Chile
Universidad de Concepción
Colegio de Geólogos
Sociedad Geológica de Chile
description Geochemical variations in arc-related magmas allow correlating their magmatic evolution with changes in the geodynamic context of the Andean subduction zone. This work focuses on Cenozoic times, comparing geochemical evolution of arc-related products through different Andean segments, including those located both in a frontal and in a retroarc position, together with alkaline retroarc volcanism associated with arc dynamics. During Paleocene to middle Eocene arc magmatism along the Southern Central Andes was constrained to the volcanic front and showed variable slab input. On the contrary, in the North Patagonian Andes, intraplate alkaline-like magmas are registered in the retroarc zone. By late Eocene to middle Oligocene times, low volumes of arc volcanism were erupted along the Andes with mostly tholeiitic composition. Arc volcanism changed to a more typical tholeiitic to calc-alkaline Andean-type by late Oligocene in the Southern Central Andes, associated with the breakup of the Farallón plate; meanwhile, arc-derived magmas in North Patagonia still showed mostly tholeiitic composition. Arc magmatism by Miocene to middle Pliocene times in Southern Central Andes show typical calc-alkaline features, while arc-derived products were expanded to the east, associated with a progressive shallow subduction regime, developed both in the present-day Pampean-Chilean flat- slab segment (∽28°-33°S) and the late Miocene Payenia shallow subduction segment (∽33°-38°S). Particularly in the Pampean- Chilean segment, middle Miocene to late Miocene arc rocks show trace elements, and Sr, Nd whole-rock isotopic ratios and in-situ Hf and O isotopic composition that display a trend towards an increase of crustal contributions, either by assimilation during magma ascent through a thick crust or linked to forearc subduction erosion and/or sediment contributions into the mantle wedge. Coeval arc magmatism in North Patagonia also showed calc-alkaline geochemical features but was mainly spatially restricted to the main Andean axis. Overall, geochemical evolution of Cenozoic arc magmas reflects the direct influence of the variable geodynamic parameters along Southern Central and North Patagonian Andes.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
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/11336/228611
Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 852-852
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228611
identifier_str_mv Geochemical evolution of Cenozoic arc-related magmas in Southern Central and North Patagonian Andes; XV Congreso Geológico Chileno; Concepción; Chile; 2018; 852-852
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://congresogeologicochileno.cl/wp-content/uploads/2018/12/Libro-de-Actas-XVCongresoGeologicoChileno2018-2.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Universidad de Concepción
publisher.none.fl_str_mv Universidad de Concepción
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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