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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/228611
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:44:22Zoai: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:34982025-09-29 10:44:22.692CONICET 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 |
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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 |
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conferenceObject |
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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 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/url/https://congresogeologicochileno.cl/wp-content/uploads/2018/12/Libro-de-Actas-XVCongresoGeologicoChileno2018-2.pdf |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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Universidad de Concepción |
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Universidad de Concepción |
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