Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina

A series of medium grade metamorphic rocks of the western sector of the Sierras Pampeanas Terrane in central western Argentina are represented by amphibolites, gneisses and schists derived from sedimentary as well as from igneous rocks. The metavolcanics consist of amphibolites, quartz-K-feldspar-mu...

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Detalles Bibliográficos
Autores principales:	Vujovich, G., Miller, H., Ramos, V.A.
Formato:	JOUR
Materias:	accretion island arc collision metavolcanic rocks Proterozoic tectonic model Argentina, Cordoba, Pampeanas Mountains
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_08959811_v7_n3-4_p309_Vujovich
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_08959811_v7_n3-4_p309_Vujovich2023-10-03T15:43:32Z Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina Vujovich, G. Miller, H. Ramos, V.A. accretion island arc collision metavolcanic rocks Proterozoic tectonic model Argentina, Cordoba, Pampeanas Mountains A series of medium grade metamorphic rocks of the western sector of the Sierras Pampeanas Terrane in central western Argentina are represented by amphibolites, gneisses and schists derived from sedimentary as well as from igneous rocks. The metavolcanics consist of amphibolites, quartz-K-feldspar-muscovite schists, and hornblende-biotite and biotite-epidote-plagioclase schists. Based on petrographic and geochemical data they are interpreted as originating as basaltic tholeiites, rhyolites and mesosilicic volcanics. The distribution and geochemical behavior are similar to present day western Pacific lavas, mainly those developed on island arcs or heavily attenuated continental crust. Based on these characteristics, an accretionary tectonic model involving a series of island-arc collisions is proposed for the Proterozoic. The complex Proterozoic tectonic history of the western Sierras Pampeanas has been partially obliterated by the emplacement of the Early Paleozoic magmatic arc rocks. © 1994. Fil:Vujovich, G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v7_n3-4_p309_Vujovich
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	accretion island arc collision metavolcanic rocks Proterozoic tectonic model Argentina, Cordoba, Pampeanas Mountains
spellingShingle	accretion island arc collision metavolcanic rocks Proterozoic tectonic model Argentina, Cordoba, Pampeanas Mountains Vujovich, G. Miller, H. Ramos, V.A. Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
topic_facet	accretion island arc collision metavolcanic rocks Proterozoic tectonic model Argentina, Cordoba, Pampeanas Mountains
description	A series of medium grade metamorphic rocks of the western sector of the Sierras Pampeanas Terrane in central western Argentina are represented by amphibolites, gneisses and schists derived from sedimentary as well as from igneous rocks. The metavolcanics consist of amphibolites, quartz-K-feldspar-muscovite schists, and hornblende-biotite and biotite-epidote-plagioclase schists. Based on petrographic and geochemical data they are interpreted as originating as basaltic tholeiites, rhyolites and mesosilicic volcanics. The distribution and geochemical behavior are similar to present day western Pacific lavas, mainly those developed on island arcs or heavily attenuated continental crust. Based on these characteristics, an accretionary tectonic model involving a series of island-arc collisions is proposed for the Proterozoic. The complex Proterozoic tectonic history of the western Sierras Pampeanas has been partially obliterated by the emplacement of the Early Paleozoic magmatic arc rocks. © 1994.
format	JOUR
author	Vujovich, G. Miller, H. Ramos, V.A.
author_facet	Vujovich, G. Miller, H. Ramos, V.A.
author_sort	Vujovich, G.
title	Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
title_short	Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
title_full	Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
title_fullStr	Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
title_full_unstemmed	Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina
title_sort	proterozoic metavolcanics from western sierras pampeanas terrane, argentina
url	http://hdl.handle.net/20.500.12110/paper_08959811_v7_n3-4_p309_Vujovich
work_keys_str_mv	AT vujovichg proterozoicmetavolcanicsfromwesternsierraspampeanasterraneargentina AT millerh proterozoicmetavolcanicsfromwesternsierraspampeanasterraneargentina AT ramosva proterozoicmetavolcanicsfromwesternsierraspampeanasterraneargentina
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Proterozoic metavolcanics from western Sierras Pampeanas terrane, Argentina

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