P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margi...

Autores
Castro, Brigida Marta Ester; Arancibia, Gloria; Morata, Diego; Belmar, Mauricio; Previley, Lorena Cristina; Pontoriero, Sandra Inés
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The geodynamic evolution of the proto-Andean margin of Gondwana during the Paleozoic was characterized by repeated subduction processes associated with the docking of several terranes, including the Cuyania–Precordillera terrane and the Chilenia terrane, and the development of the calc–alkaline Famatinian continental magmatic arc. In the Sierra de La Huerta (30°56′–31°29′ S and 67°17′–67°32′ W), at the southwestern end of the Western Sierras Pampeanas, some mafic to ultramafic igneous bodies belonging to the Famatinian arc were affected by regional metamorphism of the medium-pressure granulite facies (7–7.5 kbar, ≈ 850 °C). After this regional metamorphism, local mylonitization under amphibolite facies along discrete NW–SE to NNW–SSE striking ductile shear zones occurred. A 40Ar/39Ar plateau age of 432 ± 4 Ma was obtained on rather homogeneous hornblende porphyroclasts from a metagabbro mylonite. The textures and mineral chemistry of the mylonitized metagabbro allow its P–T–t evolution from magmatic crystallization to mylonitization to be constrained. Geochronological data obtained from mylonite provide evidence that orogenesis was active at least until the Early Silurian. This deformational event would have been related to uplift and decompression during the later stages of the orogenesis, probably associated with the accretion of the Precordillera terrane to the southwestern Gondwana margin.
Fil: Castro, Brigida Marta Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
Fil: Arancibia, Gloria. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); Chile
Fil: Morata, Diego. Universidad de Chile; Chile
Fil: Belmar, Mauricio. Universidad de Chile; Chile
Fil: Previley, Lorena Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
Fil: Pontoriero, Sandra Inés. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
Materia
METAGABBROIC MYLONITES
P-T PATH
FAMATINIAN OROGENY
ARGENTINA
40AR 39AR DATING
SIERRA DE LA HUERTA
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:11336/158233

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network_name_str CONICET Digital (CONICET)
spelling P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana marginCastro, Brigida Marta EsterArancibia, GloriaMorata, DiegoBelmar, MauricioPreviley, Lorena CristinaPontoriero, Sandra InésMETAGABBROIC MYLONITESP-T PATHFAMATINIAN OROGENYARGENTINA40AR 39AR DATINGSIERRA DE LA HUERTAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The geodynamic evolution of the proto-Andean margin of Gondwana during the Paleozoic was characterized by repeated subduction processes associated with the docking of several terranes, including the Cuyania–Precordillera terrane and the Chilenia terrane, and the development of the calc–alkaline Famatinian continental magmatic arc. In the Sierra de La Huerta (30°56′–31°29′ S and 67°17′–67°32′ W), at the southwestern end of the Western Sierras Pampeanas, some mafic to ultramafic igneous bodies belonging to the Famatinian arc were affected by regional metamorphism of the medium-pressure granulite facies (7–7.5 kbar, ≈ 850 °C). After this regional metamorphism, local mylonitization under amphibolite facies along discrete NW–SE to NNW–SSE striking ductile shear zones occurred. A 40Ar/39Ar plateau age of 432 ± 4 Ma was obtained on rather homogeneous hornblende porphyroclasts from a metagabbro mylonite. The textures and mineral chemistry of the mylonitized metagabbro allow its P–T–t evolution from magmatic crystallization to mylonitization to be constrained. Geochronological data obtained from mylonite provide evidence that orogenesis was active at least until the Early Silurian. This deformational event would have been related to uplift and decompression during the later stages of the orogenesis, probably associated with the accretion of the Precordillera terrane to the southwestern Gondwana margin.Fil: Castro, Brigida Marta Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; ArgentinaFil: Arancibia, Gloria. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); ChileFil: Morata, Diego. Universidad de Chile; ChileFil: Belmar, Mauricio. Universidad de Chile; ChileFil: Previley, Lorena Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; ArgentinaFil: Pontoriero, Sandra Inés. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; ArgentinaElsevier2008-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/158233Castro, Brigida Marta Ester; Arancibia, Gloria; Morata, Diego; Belmar, Mauricio; Previley, Lorena Cristina; et al.; P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin; Elsevier; Gondwana Research; 13; 2; 3-2008; 216-2261342-937XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.gr.2007.05.005info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1342937X07000895info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:55Zoai:ri.conicet.gov.ar:11336/158233instacron: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:34982025-09-03 10:10:56.268CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
title P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
spellingShingle P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
Castro, Brigida Marta Ester
METAGABBROIC MYLONITES
P-T PATH
FAMATINIAN OROGENY
ARGENTINA
40AR 39AR DATING
SIERRA DE LA HUERTA
title_short P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
title_full P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
title_fullStr P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
title_full_unstemmed P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
title_sort P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin
dc.creator.none.fl_str_mv Castro, Brigida Marta Ester
Arancibia, Gloria
Morata, Diego
Belmar, Mauricio
Previley, Lorena Cristina
Pontoriero, Sandra Inés
author Castro, Brigida Marta Ester
author_facet Castro, Brigida Marta Ester
Arancibia, Gloria
Morata, Diego
Belmar, Mauricio
Previley, Lorena Cristina
Pontoriero, Sandra Inés
author_role author
author2 Arancibia, Gloria
Morata, Diego
Belmar, Mauricio
Previley, Lorena Cristina
Pontoriero, Sandra Inés
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv METAGABBROIC MYLONITES
P-T PATH
FAMATINIAN OROGENY
ARGENTINA
40AR 39AR DATING
SIERRA DE LA HUERTA
topic METAGABBROIC MYLONITES
P-T PATH
FAMATINIAN OROGENY
ARGENTINA
40AR 39AR DATING
SIERRA DE LA HUERTA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The geodynamic evolution of the proto-Andean margin of Gondwana during the Paleozoic was characterized by repeated subduction processes associated with the docking of several terranes, including the Cuyania–Precordillera terrane and the Chilenia terrane, and the development of the calc–alkaline Famatinian continental magmatic arc. In the Sierra de La Huerta (30°56′–31°29′ S and 67°17′–67°32′ W), at the southwestern end of the Western Sierras Pampeanas, some mafic to ultramafic igneous bodies belonging to the Famatinian arc were affected by regional metamorphism of the medium-pressure granulite facies (7–7.5 kbar, ≈ 850 °C). After this regional metamorphism, local mylonitization under amphibolite facies along discrete NW–SE to NNW–SSE striking ductile shear zones occurred. A 40Ar/39Ar plateau age of 432 ± 4 Ma was obtained on rather homogeneous hornblende porphyroclasts from a metagabbro mylonite. The textures and mineral chemistry of the mylonitized metagabbro allow its P–T–t evolution from magmatic crystallization to mylonitization to be constrained. Geochronological data obtained from mylonite provide evidence that orogenesis was active at least until the Early Silurian. This deformational event would have been related to uplift and decompression during the later stages of the orogenesis, probably associated with the accretion of the Precordillera terrane to the southwestern Gondwana margin.
Fil: Castro, Brigida Marta Ester. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
Fil: Arancibia, Gloria. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); Chile
Fil: Morata, Diego. Universidad de Chile; Chile
Fil: Belmar, Mauricio. Universidad de Chile; Chile
Fil: Previley, Lorena Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
Fil: Pontoriero, Sandra Inés. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Geología "Dr. Emiliano Aparicio"; Argentina
description The geodynamic evolution of the proto-Andean margin of Gondwana during the Paleozoic was characterized by repeated subduction processes associated with the docking of several terranes, including the Cuyania–Precordillera terrane and the Chilenia terrane, and the development of the calc–alkaline Famatinian continental magmatic arc. In the Sierra de La Huerta (30°56′–31°29′ S and 67°17′–67°32′ W), at the southwestern end of the Western Sierras Pampeanas, some mafic to ultramafic igneous bodies belonging to the Famatinian arc were affected by regional metamorphism of the medium-pressure granulite facies (7–7.5 kbar, ≈ 850 °C). After this regional metamorphism, local mylonitization under amphibolite facies along discrete NW–SE to NNW–SSE striking ductile shear zones occurred. A 40Ar/39Ar plateau age of 432 ± 4 Ma was obtained on rather homogeneous hornblende porphyroclasts from a metagabbro mylonite. The textures and mineral chemistry of the mylonitized metagabbro allow its P–T–t evolution from magmatic crystallization to mylonitization to be constrained. Geochronological data obtained from mylonite provide evidence that orogenesis was active at least until the Early Silurian. This deformational event would have been related to uplift and decompression during the later stages of the orogenesis, probably associated with the accretion of the Precordillera terrane to the southwestern Gondwana margin.
publishDate 2008
dc.date.none.fl_str_mv 2008-03
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/11336/158233
Castro, Brigida Marta Ester; Arancibia, Gloria; Morata, Diego; Belmar, Mauricio; Previley, Lorena Cristina; et al.; P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin; Elsevier; Gondwana Research; 13; 2; 3-2008; 216-226
1342-937X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/158233
identifier_str_mv Castro, Brigida Marta Ester; Arancibia, Gloria; Morata, Diego; Belmar, Mauricio; Previley, Lorena Cristina; et al.; P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin; Elsevier; Gondwana Research; 13; 2; 3-2008; 216-226
1342-937X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gr.2007.05.005
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1342937X07000895
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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