Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)

Autores
Cingolani, Carlos Alberto; Abre, Paulina; Uriz, Norberto Javier
Año de publicación
2017
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The present isotopic data are the result of a study of basement rocks of the San Rafael Block, located at the Mendoza Province, Argentina. Two areas were sampled, the type section of the Cerro La Ventana Formation known as Leones-Ponón Trehué-La Estrechura region and ductile-deformed rocks of the El Nihuil Mafic Unit. The Rb–Sr, Sm–Nd, Pb–Pb, and U–Pb methodologies were applied in order to constrain the basement age, tectonic history and to discuss relationships with equivalent Mesoproterozoic units located along the Cuyania terrane in the proto-An- dean Gondwana margin. The Rb–Sr isochron yielded an age of 1148 ± 83 Ma, with initial ratio of 0.70292 indicat- ive of a slightly evolved Mesoproterozoic source. The Sm–Nd isochron indicates an age of 1228 ± 63 Ma, whereas TDM ages ranges between 1.23–1.64 Ga with εNd in between −0.94 and +4.7 recording a source less evolved than CHUR for the time of crystallization. In Pb/Pb diagrams the samples plot similarly to rocks from the basement of Cuyania terrane. Zircon U–Pb data obtained from tonalitic facies (Leones River type section) yielded a crystalliza- tion age of 1214.7 ± 6.5 Ma (ID-TIMS). In situ U–Pb (LA-ICP-MS) zircon data carried out at two different laborat- ories on tonalitic orthogneisses (El Nihuil Mafic Unit) record an intercept at 1256 ± 10 Ma plotted in a concordia diagram, whereas in a Tera-Wasserburg diagram the age is of 1222 ± 6.9 Ma. Therefore, a Mesoproterozoic age for the basement of the San Rafael Block is here confirmed; this ca. 1.2 Ga age is found elsewhere within the Cuyania allochthonous terrane.
Fil: Cingolani, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Abre, Paulina. Universidad de la República; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
XX Congreso Geológico Argentino
San Miguel de Tucumán
Argentina
Asociación Geológica Argentina
Materia
CUYANIA TERRANE
SAN RAFAEL BLOCK
CERRO LA VENTANA FORMATION
MESOPROTEROZOIC BASEMENT
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:11336/224885
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/224885
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)Cingolani, Carlos AlbertoAbre, PaulinaUriz, Norberto JavierCUYANIA TERRANESAN RAFAEL BLOCKCERRO LA VENTANA FORMATIONMESOPROTEROZOIC BASEMENThttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The present isotopic data are the result of a study of basement rocks of the San Rafael Block, located at the Mendoza Province, Argentina. Two areas were sampled, the type section of the Cerro La Ventana Formation known as Leones-Ponón Trehué-La Estrechura region and ductile-deformed rocks of the El Nihuil Mafic Unit. The Rb–Sr, Sm–Nd, Pb–Pb, and U–Pb methodologies were applied in order to constrain the basement age, tectonic history and to discuss relationships with equivalent Mesoproterozoic units located along the Cuyania terrane in the proto-An- dean Gondwana margin. The Rb–Sr isochron yielded an age of 1148 ± 83 Ma, with initial ratio of 0.70292 indicat- ive of a slightly evolved Mesoproterozoic source. The Sm–Nd isochron indicates an age of 1228 ± 63 Ma, whereas TDM ages ranges between 1.23–1.64 Ga with εNd in between −0.94 and +4.7 recording a source less evolved than CHUR for the time of crystallization. In Pb/Pb diagrams the samples plot similarly to rocks from the basement of Cuyania terrane. Zircon U–Pb data obtained from tonalitic facies (Leones River type section) yielded a crystalliza- tion age of 1214.7 ± 6.5 Ma (ID-TIMS). In situ U–Pb (LA-ICP-MS) zircon data carried out at two different laborat- ories on tonalitic orthogneisses (El Nihuil Mafic Unit) record an intercept at 1256 ± 10 Ma plotted in a concordia diagram, whereas in a Tera-Wasserburg diagram the age is of 1222 ± 6.9 Ma. Therefore, a Mesoproterozoic age for the basement of the San Rafael Block is here confirmed; this ca. 1.2 Ga age is found elsewhere within the Cuyania allochthonous terrane.Fil: Cingolani, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Abre, Paulina. Universidad de la República; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; ArgentinaXX Congreso Geológico ArgentinoSan Miguel de TucumánArgentinaAsociación Geológica ArgentinaAsociación Geológica Argentina2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/224885Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza); XX Congreso Geológico Argentino; San Miguel de Tucumán; Argentina; 2017; 25-31CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://geologica.org.ar/xx-cga-2017-tucuman/Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:55:31Zoai:ri.conicet.gov.ar:11336/224885instacron: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 09:55:31.553CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
title Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
spellingShingle Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
Cingolani, Carlos Alberto
CUYANIA TERRANE
SAN RAFAEL BLOCK
CERRO LA VENTANA FORMATION
MESOPROTEROZOIC BASEMENT
title_short Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
title_full Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
title_fullStr Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
title_full_unstemmed Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
title_sort Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza)
dc.creator.none.fl_str_mv Cingolani, Carlos Alberto
Abre, Paulina
Uriz, Norberto Javier
author Cingolani, Carlos Alberto
author_facet Cingolani, Carlos Alberto
Abre, Paulina
Uriz, Norberto Javier
author_role author
author2 Abre, Paulina
Uriz, Norberto Javier
author2_role author
author
dc.subject.none.fl_str_mv CUYANIA TERRANE
SAN RAFAEL BLOCK
CERRO LA VENTANA FORMATION
MESOPROTEROZOIC BASEMENT
topic CUYANIA TERRANE
SAN RAFAEL BLOCK
CERRO LA VENTANA FORMATION
MESOPROTEROZOIC BASEMENT
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 present isotopic data are the result of a study of basement rocks of the San Rafael Block, located at the Mendoza Province, Argentina. Two areas were sampled, the type section of the Cerro La Ventana Formation known as Leones-Ponón Trehué-La Estrechura region and ductile-deformed rocks of the El Nihuil Mafic Unit. The Rb–Sr, Sm–Nd, Pb–Pb, and U–Pb methodologies were applied in order to constrain the basement age, tectonic history and to discuss relationships with equivalent Mesoproterozoic units located along the Cuyania terrane in the proto-An- dean Gondwana margin. The Rb–Sr isochron yielded an age of 1148 ± 83 Ma, with initial ratio of 0.70292 indicat- ive of a slightly evolved Mesoproterozoic source. The Sm–Nd isochron indicates an age of 1228 ± 63 Ma, whereas TDM ages ranges between 1.23–1.64 Ga with εNd in between −0.94 and +4.7 recording a source less evolved than CHUR for the time of crystallization. In Pb/Pb diagrams the samples plot similarly to rocks from the basement of Cuyania terrane. Zircon U–Pb data obtained from tonalitic facies (Leones River type section) yielded a crystalliza- tion age of 1214.7 ± 6.5 Ma (ID-TIMS). In situ U–Pb (LA-ICP-MS) zircon data carried out at two different laborat- ories on tonalitic orthogneisses (El Nihuil Mafic Unit) record an intercept at 1256 ± 10 Ma plotted in a concordia diagram, whereas in a Tera-Wasserburg diagram the age is of 1222 ± 6.9 Ma. Therefore, a Mesoproterozoic age for the basement of the San Rafael Block is here confirmed; this ca. 1.2 Ga age is found elsewhere within the Cuyania allochthonous terrane.
Fil: Cingolani, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Abre, Paulina. Universidad de la República; Uruguay. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
XX Congreso Geológico Argentino
San Miguel de Tucumán
Argentina
Asociación Geológica Argentina
description The present isotopic data are the result of a study of basement rocks of the San Rafael Block, located at the Mendoza Province, Argentina. Two areas were sampled, the type section of the Cerro La Ventana Formation known as Leones-Ponón Trehué-La Estrechura region and ductile-deformed rocks of the El Nihuil Mafic Unit. The Rb–Sr, Sm–Nd, Pb–Pb, and U–Pb methodologies were applied in order to constrain the basement age, tectonic history and to discuss relationships with equivalent Mesoproterozoic units located along the Cuyania terrane in the proto-An- dean Gondwana margin. The Rb–Sr isochron yielded an age of 1148 ± 83 Ma, with initial ratio of 0.70292 indicat- ive of a slightly evolved Mesoproterozoic source. The Sm–Nd isochron indicates an age of 1228 ± 63 Ma, whereas TDM ages ranges between 1.23–1.64 Ga with εNd in between −0.94 and +4.7 recording a source less evolved than CHUR for the time of crystallization. In Pb/Pb diagrams the samples plot similarly to rocks from the basement of Cuyania terrane. Zircon U–Pb data obtained from tonalitic facies (Leones River type section) yielded a crystalliza- tion age of 1214.7 ± 6.5 Ma (ID-TIMS). In situ U–Pb (LA-ICP-MS) zircon data carried out at two different laborat- ories on tonalitic orthogneisses (El Nihuil Mafic Unit) record an intercept at 1256 ± 10 Ma plotted in a concordia diagram, whereas in a Tera-Wasserburg diagram the age is of 1222 ± 6.9 Ma. Therefore, a Mesoproterozoic age for the basement of the San Rafael Block is here confirmed; this ca. 1.2 Ga age is found elsewhere within the Cuyania allochthonous terrane.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/224885
Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza); XX Congreso Geológico Argentino; San Miguel de Tucumán; Argentina; 2017; 25-31
CONICET Digital
CONICET
url http://hdl.handle.net/11336/224885
identifier_str_mv Crustal history of the Mesoproterozoic basement of the San Rafael Block (Mendoza); XX Congreso Geológico Argentino; San Miguel de Tucumán; Argentina; 2017; 25-31
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://geologica.org.ar/xx-cga-2017-tucuman/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Geológica Argentina
publisher.none.fl_str_mv Asociación Geológica Argentina
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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