Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonic...

Autores
Gonzalez Guillot, Mauricio Alberto; Torres Carbonell, Pablo Juan; Cao, Sebastián José; Lobo, Constanza; Bordese, Sofía; Hollanda, María Helena B.M.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report the field geology, petrography, geochemistry and geochronology data for two dyke swarms in the Fuegian Andes, with the aim of correlating them with known suites and of improving the knowledge on the magmatism of the Late Cretaceous rear-arc and its relation with ductile deformation. We also provide keys for correlation based on amphibole K2O content. The Trapecio dyke swarm is mildly alkaline and ferriferous, with a zircon U-Pb age of 75 Ma; thus it belongs to the Fuegian Potassic Magmatism (78-68 Ma). The Ushuaia Peninsula dyke swarm, also known as Ushuaia Peninsula Andesites (UPA), was shown to be high-K calc-alkaline and magnesian. New radiometric ages gave 87-86 Ma. While the UPA dyke swarm exhibits foliation associated with ductile deformation, the Trapecio dyke swarm is post-kinematic and reveals emplacement controlled by the slaty cleavage in the metapelite host. Field and geophysical evidence suggest both swarms overlie small upper-crustal plutons, mostly buried. The variable composition of dykes suggests a protracted history of dyke injection, mostly fed from deeper reservoirs. Contact metamorphism around both pluton-dyke systems is very weak. By comparison with adjacent plutons we argue that the main variables controlling aureole development are small magma volumes and low injection rates.
Fil: Gonzalez Guillot, Mauricio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cao, Sebastián José. Universidad Nacional de Tierra del Fuego. Instituto de Ciencias Polares, Recursos Naturales y Ambiente; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
Fil: Lobo, Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Bordese, Sofía. La.Te. Andes S.A.; Argentina
Fil: Hollanda, María Helena B.M.. Universidade de Sao Paulo; Brasil
Materia
Fuegian Andes
Ushuaia
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:11336/232658
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/232658
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network_name_str CONICET Digital (CONICET)
spelling Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonicsGonzalez Guillot, Mauricio AlbertoTorres Carbonell, Pablo JuanCao, Sebastián JoséLobo, ConstanzaBordese, SofíaHollanda, María Helena B.M.Fuegian AndesUshuaiahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We report the field geology, petrography, geochemistry and geochronology data for two dyke swarms in the Fuegian Andes, with the aim of correlating them with known suites and of improving the knowledge on the magmatism of the Late Cretaceous rear-arc and its relation with ductile deformation. We also provide keys for correlation based on amphibole K2O content. The Trapecio dyke swarm is mildly alkaline and ferriferous, with a zircon U-Pb age of 75 Ma; thus it belongs to the Fuegian Potassic Magmatism (78-68 Ma). The Ushuaia Peninsula dyke swarm, also known as Ushuaia Peninsula Andesites (UPA), was shown to be high-K calc-alkaline and magnesian. New radiometric ages gave 87-86 Ma. While the UPA dyke swarm exhibits foliation associated with ductile deformation, the Trapecio dyke swarm is post-kinematic and reveals emplacement controlled by the slaty cleavage in the metapelite host. Field and geophysical evidence suggest both swarms overlie small upper-crustal plutons, mostly buried. The variable composition of dykes suggests a protracted history of dyke injection, mostly fed from deeper reservoirs. Contact metamorphism around both pluton-dyke systems is very weak. By comparison with adjacent plutons we argue that the main variables controlling aureole development are small magma volumes and low injection rates.Fil: Gonzalez Guillot, Mauricio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; ArgentinaFil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Cao, Sebastián José. Universidad Nacional de Tierra del Fuego. Instituto de Ciencias Polares, Recursos Naturales y Ambiente; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; ArgentinaFil: Lobo, Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Bordese, Sofía. La.Te. Andes S.A.; ArgentinaFil: Hollanda, María Helena B.M.. Universidade de Sao Paulo; BrasilGeological Society Publications House2024-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/232658Gonzalez Guillot, Mauricio Alberto; Torres Carbonell, Pablo Juan; Cao, Sebastián José; Lobo, Constanza; Bordese, Sofía; et al.; Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics; Geological Society Publications House; Journal of the Geological Society; 181; 3; 3-2024; 1-440016-7649CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.lyellcollection.org/doi/abs/10.1144/jgs2023-094info:eu-repo/semantics/altIdentifier/doi/10.1144/jgs2023-094info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:42Zoai:ri.conicet.gov.ar:11336/232658instacron: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 10:45:42.456CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
title Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
spellingShingle Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
Gonzalez Guillot, Mauricio Alberto
Fuegian Andes
Ushuaia
title_short Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
title_full Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
title_fullStr Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
title_full_unstemmed Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
title_sort Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics
dc.creator.none.fl_str_mv Gonzalez Guillot, Mauricio Alberto
Torres Carbonell, Pablo Juan
Cao, Sebastián José
Lobo, Constanza
Bordese, Sofía
Hollanda, María Helena B.M.
author Gonzalez Guillot, Mauricio Alberto
author_facet Gonzalez Guillot, Mauricio Alberto
Torres Carbonell, Pablo Juan
Cao, Sebastián José
Lobo, Constanza
Bordese, Sofía
Hollanda, María Helena B.M.
author_role author
author2 Torres Carbonell, Pablo Juan
Cao, Sebastián José
Lobo, Constanza
Bordese, Sofía
Hollanda, María Helena B.M.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Fuegian Andes
Ushuaia
topic Fuegian Andes
Ushuaia
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report the field geology, petrography, geochemistry and geochronology data for two dyke swarms in the Fuegian Andes, with the aim of correlating them with known suites and of improving the knowledge on the magmatism of the Late Cretaceous rear-arc and its relation with ductile deformation. We also provide keys for correlation based on amphibole K2O content. The Trapecio dyke swarm is mildly alkaline and ferriferous, with a zircon U-Pb age of 75 Ma; thus it belongs to the Fuegian Potassic Magmatism (78-68 Ma). The Ushuaia Peninsula dyke swarm, also known as Ushuaia Peninsula Andesites (UPA), was shown to be high-K calc-alkaline and magnesian. New radiometric ages gave 87-86 Ma. While the UPA dyke swarm exhibits foliation associated with ductile deformation, the Trapecio dyke swarm is post-kinematic and reveals emplacement controlled by the slaty cleavage in the metapelite host. Field and geophysical evidence suggest both swarms overlie small upper-crustal plutons, mostly buried. The variable composition of dykes suggests a protracted history of dyke injection, mostly fed from deeper reservoirs. Contact metamorphism around both pluton-dyke systems is very weak. By comparison with adjacent plutons we argue that the main variables controlling aureole development are small magma volumes and low injection rates.
Fil: Gonzalez Guillot, Mauricio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cao, Sebastián José. Universidad Nacional de Tierra del Fuego. Instituto de Ciencias Polares, Recursos Naturales y Ambiente; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
Fil: Lobo, Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Bordese, Sofía. La.Te. Andes S.A.; Argentina
Fil: Hollanda, María Helena B.M.. Universidade de Sao Paulo; Brasil
description We report the field geology, petrography, geochemistry and geochronology data for two dyke swarms in the Fuegian Andes, with the aim of correlating them with known suites and of improving the knowledge on the magmatism of the Late Cretaceous rear-arc and its relation with ductile deformation. We also provide keys for correlation based on amphibole K2O content. The Trapecio dyke swarm is mildly alkaline and ferriferous, with a zircon U-Pb age of 75 Ma; thus it belongs to the Fuegian Potassic Magmatism (78-68 Ma). The Ushuaia Peninsula dyke swarm, also known as Ushuaia Peninsula Andesites (UPA), was shown to be high-K calc-alkaline and magnesian. New radiometric ages gave 87-86 Ma. While the UPA dyke swarm exhibits foliation associated with ductile deformation, the Trapecio dyke swarm is post-kinematic and reveals emplacement controlled by the slaty cleavage in the metapelite host. Field and geophysical evidence suggest both swarms overlie small upper-crustal plutons, mostly buried. The variable composition of dykes suggests a protracted history of dyke injection, mostly fed from deeper reservoirs. Contact metamorphism around both pluton-dyke systems is very weak. By comparison with adjacent plutons we argue that the main variables controlling aureole development are small magma volumes and low injection rates.
publishDate 2024
dc.date.none.fl_str_mv 2024-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/232658
Gonzalez Guillot, Mauricio Alberto; Torres Carbonell, Pablo Juan; Cao, Sebastián José; Lobo, Constanza; Bordese, Sofía; et al.; Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics; Geological Society Publications House; Journal of the Geological Society; 181; 3; 3-2024; 1-44
0016-7649
CONICET Digital
CONICET
url http://hdl.handle.net/11336/232658
identifier_str_mv Gonzalez Guillot, Mauricio Alberto; Torres Carbonell, Pablo Juan; Cao, Sebastián José; Lobo, Constanza; Bordese, Sofía; et al.; Field geology, petrology and geochronology of pluton-dyke systems, the Trapecio and Ushuaia Peninsula dyke swarms (Fuegian Andes): Emplacement conditions and relation with tectonics; Geological Society Publications House; Journal of the Geological Society; 181; 3; 3-2024; 1-44
0016-7649
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.lyellcollection.org/doi/abs/10.1144/jgs2023-094
info:eu-repo/semantics/altIdentifier/doi/10.1144/jgs2023-094
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.publisher.none.fl_str_mv Geological Society Publications House
publisher.none.fl_str_mv Geological Society Publications House
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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score 13.070432

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