The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region

Autores
Zaffarana, C.B.; Montenegro, T.; Somoza, R.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Small outcrops of biotitic-amphibolic schists and amphibolites found in two localities suggest that the Cushamen Formation is host rock of the Central Patagonian Batholith in Gastre. The characteristics of these rocks were investigated using structural, petrographic, magnetic fabric, and garnet chemical-zonation studies. Garnet is observed as a late product of contact metamorphism. Structural data from the studied area and from other localities in the region are in conflict with models that invoke the occurrence of uniform, large-scale dextral displacements along the Gastre lineament in Mesosoic times. Rather, the data suggest that the Gastre granitoids record heterogeneous low-temperature deformation of likely Late Triassic age. This low-temperature deformation appears as small, localized outcrops, and we suggest that it is related to the accommodation of the successive magma batches that built the Central Patagonian Batholith.
Fil:Zaffarana, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Montenegro, T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Somoza, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Rev. Asoc. Geol. Argent. 2012;69(1):106-126
Materia
Basement rocks
Central patagonian batholith
Garnet zonation
Gastre
Gastre fault system
North-patagonian massif
amphibolite
basement rock
batholith
biotite
deformation mechanism
displacement
fault zone
garnet
Jurassic
low temperature
schist
structural geology
Triassic
Argentina
Chubut
Cushamen
Patagonia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00044822_v69_n1_p106_Zaffarana
Acceder
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oai_identifier_str paperaa:paper_00044822_v69_n1_p106_Zaffarana
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region Zaffarana, C.B.Montenegro, T.Somoza, R.Basement rocksCentral patagonian batholithGarnet zonationGastreGastre fault systemNorth-patagonian massifamphibolitebasement rockbatholithbiotitedeformation mechanismdisplacementfault zonegarnetJurassiclow temperatureschiststructural geologyTriassicArgentinaChubutCushamenPatagoniaSmall outcrops of biotitic-amphibolic schists and amphibolites found in two localities suggest that the Cushamen Formation is host rock of the Central Patagonian Batholith in Gastre. The characteristics of these rocks were investigated using structural, petrographic, magnetic fabric, and garnet chemical-zonation studies. Garnet is observed as a late product of contact metamorphism. Structural data from the studied area and from other localities in the region are in conflict with models that invoke the occurrence of uniform, large-scale dextral displacements along the Gastre lineament in Mesosoic times. Rather, the data suggest that the Gastre granitoids record heterogeneous low-temperature deformation of likely Late Triassic age. This low-temperature deformation appears as small, localized outcrops, and we suggest that it is related to the accommodation of the successive magma batches that built the Central Patagonian Batholith.Fil:Zaffarana, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Montenegro, T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Somoza, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00044822_v69_n1_p106_ZaffaranaRev. Asoc. Geol. Argent. 2012;69(1):106-126reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-10-16T09:29:58Zpaperaa:paper_00044822_v69_n1_p106_ZaffaranaInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-10-16 09:29:59.926Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
title The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
spellingShingle The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
Zaffarana, C.B.
Basement rocks
Central patagonian batholith
Garnet zonation
Gastre
Gastre fault system
North-patagonian massif
amphibolite
basement rock
batholith
biotite
deformation mechanism
displacement
fault zone
garnet
Jurassic
low temperature
schist
structural geology
Triassic
Argentina
Chubut
Cushamen
Patagonia
title_short The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
title_full The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
title_fullStr The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
title_full_unstemmed The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
title_sort The host rock of the central Patagonian batholith in Gastre: Further insights on the late Triassic to early Jurassic deformation in the region
dc.creator.none.fl_str_mv Zaffarana, C.B.
Montenegro, T.
Somoza, R.
author Zaffarana, C.B.
author_facet Zaffarana, C.B.
Montenegro, T.
Somoza, R.
author_role author
author2 Montenegro, T.
Somoza, R.
author2_role author
author
dc.subject.none.fl_str_mv Basement rocks
Central patagonian batholith
Garnet zonation
Gastre
Gastre fault system
North-patagonian massif
amphibolite
basement rock
batholith
biotite
deformation mechanism
displacement
fault zone
garnet
Jurassic
low temperature
schist
structural geology
Triassic
Argentina
Chubut
Cushamen
Patagonia
topic Basement rocks
Central patagonian batholith
Garnet zonation
Gastre
Gastre fault system
North-patagonian massif
amphibolite
basement rock
batholith
biotite
deformation mechanism
displacement
fault zone
garnet
Jurassic
low temperature
schist
structural geology
Triassic
Argentina
Chubut
Cushamen
Patagonia
dc.description.none.fl_txt_mv Small outcrops of biotitic-amphibolic schists and amphibolites found in two localities suggest that the Cushamen Formation is host rock of the Central Patagonian Batholith in Gastre. The characteristics of these rocks were investigated using structural, petrographic, magnetic fabric, and garnet chemical-zonation studies. Garnet is observed as a late product of contact metamorphism. Structural data from the studied area and from other localities in the region are in conflict with models that invoke the occurrence of uniform, large-scale dextral displacements along the Gastre lineament in Mesosoic times. Rather, the data suggest that the Gastre granitoids record heterogeneous low-temperature deformation of likely Late Triassic age. This low-temperature deformation appears as small, localized outcrops, and we suggest that it is related to the accommodation of the successive magma batches that built the Central Patagonian Batholith.
Fil:Zaffarana, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Montenegro, T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Somoza, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Small outcrops of biotitic-amphibolic schists and amphibolites found in two localities suggest that the Cushamen Formation is host rock of the Central Patagonian Batholith in Gastre. The characteristics of these rocks were investigated using structural, petrographic, magnetic fabric, and garnet chemical-zonation studies. Garnet is observed as a late product of contact metamorphism. Structural data from the studied area and from other localities in the region are in conflict with models that invoke the occurrence of uniform, large-scale dextral displacements along the Gastre lineament in Mesosoic times. Rather, the data suggest that the Gastre granitoids record heterogeneous low-temperature deformation of likely Late Triassic age. This low-temperature deformation appears as small, localized outcrops, and we suggest that it is related to the accommodation of the successive magma batches that built the Central Patagonian Batholith.
publishDate 2012
dc.date.none.fl_str_mv 2012
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/20.500.12110/paper_00044822_v69_n1_p106_Zaffarana
url http://hdl.handle.net/20.500.12110/paper_00044822_v69_n1_p106_Zaffarana
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Rev. Asoc. Geol. Argent. 2012;69(1):106-126
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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score 12.712165

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