Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province

Autores
Mateo FerNández Caso, P.M.; Montero, D.G.; Leal, P.R.; Ramos, V.A.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Magmatism related to the growth and migration of the Andean arc was developed from the 36°40'S to the 38°20'S latitude, in the northwestern sector of the Neuquén Province, by the end of the Mesozoic. Hypabyssal and extrusive facies, which outcrop in the Pichaihue area, were described based on petrologic studies. The first ones are composed of andesites that are emplaced as lacoliths, dikes or sills intruding the Mesozoic sedimentary sequences. In addition, basalts outcrops were recognized. The extrusive facies consist of breccia or massive lavas and little domes. The geochemistry reveals an arc-like calc-alkaline signature with a normal crust and trace-element patterns which suggest a similar source. Based on regional knowledge, three groups are proposed: Cerro Mocho dikes with Ti anomalies and higher Sm/Yb; extrusive facies of the Upper Cretaceous- Paleocene (Rivera Andesite); and the hypabyssal facies of thr Eocene (Colipilli Dikes). Finally, the occurrences of these rocks in this segment of the Andes indicate an important shift to the East of the Upper Cretaceous-Eocene volcanic arc that reveals its easternmost position.
Fil:Mateo FerNández Caso, P.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Montero, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Leal, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Rev. Asoc. Geol. Argent. 2011;68(2):173-184
Materia
Cayanta
Colipilli
Neuquén basin
Tertiary magmatism
andesite
Cretaceous
dike
emplacement
Eocene
geochemistry
island arc
magmatism
Mesozoic
outcrop
petrography
petrology
Tertiary
trace element
Andes
Argentina
Neuquen
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_v68_n2_p173_MateoFerNandezCaso
Acceder
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oai_identifier_str paperaa:paper_00044822_v68_n2_p173_MateoFerNandezCaso
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province Mateo FerNández Caso, P.M.Montero, D.G.Leal, P.R.Ramos, V.A.CayantaColipilliNeuquén basinTertiary magmatismandesiteCretaceousdikeemplacementEocenegeochemistryisland arcmagmatismMesozoicoutcroppetrographypetrologyTertiarytrace elementAndesArgentinaNeuquenMagmatism related to the growth and migration of the Andean arc was developed from the 36°40'S to the 38°20'S latitude, in the northwestern sector of the Neuquén Province, by the end of the Mesozoic. Hypabyssal and extrusive facies, which outcrop in the Pichaihue area, were described based on petrologic studies. The first ones are composed of andesites that are emplaced as lacoliths, dikes or sills intruding the Mesozoic sedimentary sequences. In addition, basalts outcrops were recognized. The extrusive facies consist of breccia or massive lavas and little domes. The geochemistry reveals an arc-like calc-alkaline signature with a normal crust and trace-element patterns which suggest a similar source. Based on regional knowledge, three groups are proposed: Cerro Mocho dikes with Ti anomalies and higher Sm/Yb; extrusive facies of the Upper Cretaceous- Paleocene (Rivera Andesite); and the hypabyssal facies of thr Eocene (Colipilli Dikes). Finally, the occurrences of these rocks in this segment of the Andes indicate an important shift to the East of the Upper Cretaceous-Eocene volcanic arc that reveals its easternmost position.Fil:Mateo FerNández Caso, P.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Montero, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Leal, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2011info: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_v68_n2_p173_MateoFerNandezCasoRev. Asoc. Geol. Argent. 2011;68(2):173-184reponame: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/ar2025-10-16T09:30:01Zpaperaa:paper_00044822_v68_n2_p173_MateoFerNandezCasoInstitucionalhttps://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 09:30:02.678Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
title Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
spellingShingle Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
Mateo FerNández Caso, P.M.
Cayanta
Colipilli
Neuquén basin
Tertiary magmatism
andesite
Cretaceous
dike
emplacement
Eocene
geochemistry
island arc
magmatism
Mesozoic
outcrop
petrography
petrology
Tertiary
trace element
Andes
Argentina
Neuquen
title_short Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
title_full Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
title_fullStr Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
title_full_unstemmed Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
title_sort Petrography and geochemistry of upper cretaceous-eocene magmatism in the pichaihue area, neuquén province
dc.creator.none.fl_str_mv Mateo FerNández Caso, P.M.
Montero, D.G.
Leal, P.R.
Ramos, V.A.
author Mateo FerNández Caso, P.M.
author_facet Mateo FerNández Caso, P.M.
Montero, D.G.
Leal, P.R.
Ramos, V.A.
author_role author
author2 Montero, D.G.
Leal, P.R.
Ramos, V.A.
author2_role author
author
author
dc.subject.none.fl_str_mv Cayanta
Colipilli
Neuquén basin
Tertiary magmatism
andesite
Cretaceous
dike
emplacement
Eocene
geochemistry
island arc
magmatism
Mesozoic
outcrop
petrography
petrology
Tertiary
trace element
Andes
Argentina
Neuquen
topic Cayanta
Colipilli
Neuquén basin
Tertiary magmatism
andesite
Cretaceous
dike
emplacement
Eocene
geochemistry
island arc
magmatism
Mesozoic
outcrop
petrography
petrology
Tertiary
trace element
Andes
Argentina
Neuquen
dc.description.none.fl_txt_mv Magmatism related to the growth and migration of the Andean arc was developed from the 36°40'S to the 38°20'S latitude, in the northwestern sector of the Neuquén Province, by the end of the Mesozoic. Hypabyssal and extrusive facies, which outcrop in the Pichaihue area, were described based on petrologic studies. The first ones are composed of andesites that are emplaced as lacoliths, dikes or sills intruding the Mesozoic sedimentary sequences. In addition, basalts outcrops were recognized. The extrusive facies consist of breccia or massive lavas and little domes. The geochemistry reveals an arc-like calc-alkaline signature with a normal crust and trace-element patterns which suggest a similar source. Based on regional knowledge, three groups are proposed: Cerro Mocho dikes with Ti anomalies and higher Sm/Yb; extrusive facies of the Upper Cretaceous- Paleocene (Rivera Andesite); and the hypabyssal facies of thr Eocene (Colipilli Dikes). Finally, the occurrences of these rocks in this segment of the Andes indicate an important shift to the East of the Upper Cretaceous-Eocene volcanic arc that reveals its easternmost position.
Fil:Mateo FerNández Caso, P.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Montero, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Leal, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Magmatism related to the growth and migration of the Andean arc was developed from the 36°40'S to the 38°20'S latitude, in the northwestern sector of the Neuquén Province, by the end of the Mesozoic. Hypabyssal and extrusive facies, which outcrop in the Pichaihue area, were described based on petrologic studies. The first ones are composed of andesites that are emplaced as lacoliths, dikes or sills intruding the Mesozoic sedimentary sequences. In addition, basalts outcrops were recognized. The extrusive facies consist of breccia or massive lavas and little domes. The geochemistry reveals an arc-like calc-alkaline signature with a normal crust and trace-element patterns which suggest a similar source. Based on regional knowledge, three groups are proposed: Cerro Mocho dikes with Ti anomalies and higher Sm/Yb; extrusive facies of the Upper Cretaceous- Paleocene (Rivera Andesite); and the hypabyssal facies of thr Eocene (Colipilli Dikes). Finally, the occurrences of these rocks in this segment of the Andes indicate an important shift to the East of the Upper Cretaceous-Eocene volcanic arc that reveals its easternmost position.
publishDate 2011
dc.date.none.fl_str_mv 2011
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_v68_n2_p173_MateoFerNandezCaso
url http://hdl.handle.net/20.500.12110/paper_00044822_v68_n2_p173_MateoFerNandezCaso
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. 2011;68(2):173-184
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 12.706009

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