Age, petrography and geochemistry of Cerro Falkner's granitoid

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Cerro Falkner is composed of granitic rocks underlying volcanic rocks of the Ventana Formation of Paleogene age. Those intrusives are graniodioritic in composition, metaluminous to peraluminous, subalkaline, with characteristics of volcanic arc granites that are concordant with other granitoids of t...

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Autores principales:	Crosta, S., Vattuone, M.E., Latorre, C.O.
Formato:	Artículo publishedVersion
Lenguaje:	Inglés
Publicado:	2008
Materias:	Cerro Falkner Lower Cretaceous Granodiorites Neuquén Cretaceous geochronology granitoid granodiorite igneous geochemistry Paleogene petrography potassium-argon dating volcanism Argentina Neuquen South America
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p152_Crosta
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paperaa:paper_00044822_v63_n1_p152_Crosta
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spelling	paperaa:paper_00044822_v63_n1_p152_Crosta2023-06-12T16:40:13Z Age, petrography and geochemistry of Cerro Falkner's granitoid Rev. Asoc. Geol. Argent. 2008;63(1):152-155 Crosta, S. Vattuone, M.E. Latorre, C.O. Cerro Falkner Lower Cretaceous Granodiorites Neuquén Cretaceous geochronology granitoid granodiorite igneous geochemistry Paleogene petrography potassium-argon dating volcanism Argentina Cerro Falkner Neuquen South America Cerro Falkner is composed of granitic rocks underlying volcanic rocks of the Ventana Formation of Paleogene age. Those intrusives are graniodioritic in composition, metaluminous to peraluminous, subalkaline, with characteristics of volcanic arc granites that are concordant with other granitoids of the Cordillera Patagónica Septentrional's northern segment. The age obtained by the K-Ar method on tschemakitic amphiboles (125 ± 20 Ma) points out a minimun age from the lower Cretaceous for the Cerro Falkner's granodiorite. Therefore the use of the term Los Machis Formation (Upper Cretaceous) would be incorrect for these rocks. This age, allows us to relate the granitic rocks on the study area to the lower Cretaceous, coeval with the volcanism of the Divisadero Group. Fil:Crosta, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vattuone, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Latorre, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p152_Crosta
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language	Inglés
orig_language_str_mv	eng
topic	Cerro Falkner Lower Cretaceous Granodiorites Neuquén Cretaceous geochronology granitoid granodiorite igneous geochemistry Paleogene petrography potassium-argon dating volcanism Argentina Cerro Falkner Neuquen South America
spellingShingle	Cerro Falkner Lower Cretaceous Granodiorites Neuquén Cretaceous geochronology granitoid granodiorite igneous geochemistry Paleogene petrography potassium-argon dating volcanism Argentina Cerro Falkner Neuquen South America Crosta, S. Vattuone, M.E. Latorre, C.O. Age, petrography and geochemistry of Cerro Falkner's granitoid
topic_facet	Cerro Falkner Lower Cretaceous Granodiorites Neuquén Cretaceous geochronology granitoid granodiorite igneous geochemistry Paleogene petrography potassium-argon dating volcanism Argentina Cerro Falkner Neuquen South America
description	Cerro Falkner is composed of granitic rocks underlying volcanic rocks of the Ventana Formation of Paleogene age. Those intrusives are graniodioritic in composition, metaluminous to peraluminous, subalkaline, with characteristics of volcanic arc granites that are concordant with other granitoids of the Cordillera Patagónica Septentrional's northern segment. The age obtained by the K-Ar method on tschemakitic amphiboles (125 ± 20 Ma) points out a minimun age from the lower Cretaceous for the Cerro Falkner's granodiorite. Therefore the use of the term Los Machis Formation (Upper Cretaceous) would be incorrect for these rocks. This age, allows us to relate the granitic rocks on the study area to the lower Cretaceous, coeval with the volcanism of the Divisadero Group.
format	Artículo Artículo publishedVersion
author	Crosta, S. Vattuone, M.E. Latorre, C.O.
author_facet	Crosta, S. Vattuone, M.E. Latorre, C.O.
author_sort	Crosta, S.
title	Age, petrography and geochemistry of Cerro Falkner's granitoid
title_short	Age, petrography and geochemistry of Cerro Falkner's granitoid
title_full	Age, petrography and geochemistry of Cerro Falkner's granitoid
title_fullStr	Age, petrography and geochemistry of Cerro Falkner's granitoid
title_full_unstemmed	Age, petrography and geochemistry of Cerro Falkner's granitoid
title_sort	age, petrography and geochemistry of cerro falkner's granitoid
publishDate	2008
url	http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p152_Crosta
work_keys_str_mv	AT crostas agepetrographyandgeochemistryofcerrofalknersgranitoid AT vattuoneme agepetrographyandgeochemistryofcerrofalknersgranitoid AT latorreco agepetrographyandgeochemistryofcerrofalknersgranitoid
_version_	1769810255171026944

Age, petrography and geochemistry of Cerro Falkner's granitoid

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