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

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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 unk...

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Autores principales: González, Santiago Nicolás, Greco, Gerson Alan, González, Pablo Diego, Sato, Ana María, Llambías, Eduardo Jorge, Varela, Ricardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79824
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79824
record_format dspace
spelling I19-R120-10915-798242024-02-09T17:57:18Z http://sedici.unlp.edu.ar/handle/10915/79824 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 Greco, Gerson Alan González, Pablo Diego Sato, Ana María Llambías, Eduardo Jorge Varela, Ricardo 2016 2019-08-26T18:03:00Z en Geología Patagonia Trachyandesite Mildly alkaline Extension Postorogenic 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 Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 69-82
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
spellingShingle Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
González, Santiago Nicolás
Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
topic_facet Geología
Patagonia
Trachyandesite
Mildly alkaline
Extension
Postorogenic
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.
format Articulo
Articulo
author González, Santiago Nicolás
Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
author_facet González, Santiago Nicolás
Greco, Gerson Alan
González, Pablo Diego
Sato, Ana María
Llambías, Eduardo Jorge
Varela, Ricardo
author_sort González, Santiago Nicolás
title Geochemistry of a Triassic dyke swarm in the North Patagonian Massif, Argentina : Implications for a postorogenic event of the Permian Gondwanide orogeny
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
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/79824
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