Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny

Autores
González, Santiago Nicolás; Greco, Gerson Alan; González, Pablo Diego; Sato, Ana María; Llambías, Eduardo Jorge; Varela, Ricardo
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Permo-Triassic magmatism is widespread in the eastern North Patagonian Massif and has been related tothe Gondwanide orogeny. Although a magmatic arc setting is widely accepted for the Permian plutonicrocks, the origin and geotectonic setting for the Triassic plutonic and volcanic rocks are still unknown. ANW-SE Triassic dyke swarm composed of andesites and latites with minor rhyolites was previouslydescribed in the Sierra GrandeeRincon de Paileman area. The dyke swarm was associated withextensional tectonics which was linked to a postorogenic process.In this paper we present new geochemical data of the rocks that form the swarm. Trachyandesites andrhyolites were separated based on their geochemical characteristics. Both groups may be consideredoriginated from different sources. On the other hand, the content of incompatible elements (LILE andHFSE) indicates a strong relation between the swarm and an active continental margin. The samples alsoshow a transitional signature between continental-arc and postcollisional or anorogenic settings.The new geochemical data on the dyke swarm support the idea of a magmatism that was linked to apostorogenic extensional tectonic regime related to a continental magmatic arc. Such an extensionstarted in the Paleopacific margin of Pangea during the Anisian and might indicate the beginning of thePangea break-up.
Facultad de Ciencias Naturales y Museo
Centro de Investigaciones Geológicas
Materia
Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/79824
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/79824
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogenyGonzález, Santiago NicolásGreco, Gerson AlanGonzález, Pablo DiegoSato, Ana MaríaLlambías, Eduardo JorgeVarela, RicardoGeologíaPatagoniaTrachyandesiteMildly alkalineExtensionPostorogenicPermo-Triassic magmatism is widespread in the eastern North Patagonian Massif and has been related tothe Gondwanide orogeny. Although a magmatic arc setting is widely accepted for the Permian plutonicrocks, the origin and geotectonic setting for the Triassic plutonic and volcanic rocks are still unknown. ANW-SE Triassic dyke swarm composed of andesites and latites with minor rhyolites was previouslydescribed in the Sierra GrandeeRincon de Paileman area. The dyke swarm was associated withextensional tectonics which was linked to a postorogenic process.In this paper we present new geochemical data of the rocks that form the swarm. Trachyandesites andrhyolites were separated based on their geochemical characteristics. Both groups may be consideredoriginated from different sources. On the other hand, the content of incompatible elements (LILE andHFSE) indicates a strong relation between the swarm and an active continental margin. The samples alsoshow a transitional signature between continental-arc and postcollisional or anorogenic settings.The new geochemical data on the dyke swarm support the idea of a magmatism that was linked to apostorogenic extensional tectonic regime related to a continental magmatic arc. Such an extensionstarted in the Paleopacific margin of Pangea during the Anisian and might indicate the beginning of thePangea break-up.Facultad de Ciencias Naturales y MuseoCentro de Investigaciones Geológicas2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf69-82http://sedici.unlp.edu.ar/handle/10915/79824enginfo:eu-repo/semantics/altIdentifier/issn/0895-9811info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.04.009info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-29T15:19:42Zoai:sedici.unlp.edu.ar:10915/79824Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-29 15:19:42.653SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
title Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
spellingShingle Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
González, Santiago Nicolás
Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
title_short Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
title_full Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
title_fullStr Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
title_full_unstemmed Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
title_sort Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
dc.creator.none.fl_str_mv González, Santiago Nicolás
Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
author González, Santiago Nicolás
author_facet González, Santiago Nicolás
Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
author_role author
author2 Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
topic Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
dc.description.none.fl_txt_mv Permo-Triassic magmatism is widespread in the eastern North Patagonian Massif and has been related tothe Gondwanide orogeny. Although a magmatic arc setting is widely accepted for the Permian plutonicrocks, the origin and geotectonic setting for the Triassic plutonic and volcanic rocks are still unknown. ANW-SE Triassic dyke swarm composed of andesites and latites with minor rhyolites was previouslydescribed in the Sierra GrandeeRincon de Paileman area. The dyke swarm was associated withextensional tectonics which was linked to a postorogenic process.In this paper we present new geochemical data of the rocks that form the swarm. Trachyandesites andrhyolites were separated based on their geochemical characteristics. Both groups may be consideredoriginated from different sources. On the other hand, the content of incompatible elements (LILE andHFSE) indicates a strong relation between the swarm and an active continental margin. The samples alsoshow a transitional signature between continental-arc and postcollisional or anorogenic settings.The new geochemical data on the dyke swarm support the idea of a magmatism that was linked to apostorogenic extensional tectonic regime related to a continental magmatic arc. Such an extensionstarted in the Paleopacific margin of Pangea during the Anisian and might indicate the beginning of thePangea break-up.
Facultad de Ciencias Naturales y Museo
Centro de Investigaciones Geológicas
description Permo-Triassic magmatism is widespread in the eastern North Patagonian Massif and has been related tothe Gondwanide orogeny. Although a magmatic arc setting is widely accepted for the Permian plutonicrocks, the origin and geotectonic setting for the Triassic plutonic and volcanic rocks are still unknown. ANW-SE Triassic dyke swarm composed of andesites and latites with minor rhyolites was previouslydescribed in the Sierra GrandeeRincon de Paileman area. The dyke swarm was associated withextensional tectonics which was linked to a postorogenic process.In this paper we present new geochemical data of the rocks that form the swarm. Trachyandesites andrhyolites were separated based on their geochemical characteristics. Both groups may be consideredoriginated from different sources. On the other hand, the content of incompatible elements (LILE andHFSE) indicates a strong relation between the swarm and an active continental margin. The samples alsoshow a transitional signature between continental-arc and postcollisional or anorogenic settings.The new geochemical data on the dyke swarm support the idea of a magmatism that was linked to apostorogenic extensional tectonic regime related to a continental magmatic arc. Such an extensionstarted in the Paleopacific margin of Pangea during the Anisian and might indicate the beginning of thePangea break-up.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/79824
url http://sedici.unlp.edu.ar/handle/10915/79824
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0895-9811
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.04.009
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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