Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay

The Lavalleja Group exposed along the Dom Feliciano orogenic belt is located in the southeast of Uruguay. This group consists of volcano-sedimentary rocks, developed during the Neoproterozoic Brasiliano cycle. The geochemical signature of the igneous rocks of the Lavalleja Group, mainly metagabbros...

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Detalles Bibliográficos
Autores principales:	Cosarinsky, Mariana, Ramos, Victor Alberto
Publicado:	2001
Materias:	Back-arc basin Brasiliano cycle Lavalleja Group Neoproterozoic Uruguay
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v4_n3_p395_Bettucci http://hdl.handle.net/20.500.12110/paper_1342937X_v4_n3_p395_Bettucci
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_1342937X_v4_n3_p395_Bettucci
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spelling	paper:paper_1342937X_v4_n3_p395_Bettucci2023-06-08T16:10:35Z Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay Cosarinsky, Mariana Ramos, Victor Alberto Back-arc basin Brasiliano cycle Lavalleja Group Neoproterozoic Uruguay The Lavalleja Group exposed along the Dom Feliciano orogenic belt is located in the southeast of Uruguay. This group consists of volcano-sedimentary rocks, developed during the Neoproterozoic Brasiliano cycle. The geochemical signature of the igneous rocks of the Lavalleja Group, mainly metagabbros and basic and acidic metavolcanic rocks, indicates a back-arc basin tectonic setting. The metamorphic grade increases to the southeast, from very low grade, lower green-schist facies, in the Minas Formation, to a medium grade, amphibolite facies, in Fuente del Puma and Zanja del Tigre Formations. The metamorphic mineral assemblages correspond to a low-pressure regional metamorphism associated with a high thermal gradient. A compressive deformational event that probably corresponds to the closure of the Lavalleja basin during a continental collision, was recognized. The petrology, geochemistry, metamorphic grade, and tectonic setting are consistent with a back-arc basin setting for the Lavalleja Group. Fil:Cosarinsky, M. 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. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v4_n3_p395_Bettucci http://hdl.handle.net/20.500.12110/paper_1342937X_v4_n3_p395_Bettucci
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Back-arc basin Brasiliano cycle Lavalleja Group Neoproterozoic Uruguay
spellingShingle	Back-arc basin Brasiliano cycle Lavalleja Group Neoproterozoic Uruguay Cosarinsky, Mariana Ramos, Victor Alberto Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
topic_facet	Back-arc basin Brasiliano cycle Lavalleja Group Neoproterozoic Uruguay
description	The Lavalleja Group exposed along the Dom Feliciano orogenic belt is located in the southeast of Uruguay. This group consists of volcano-sedimentary rocks, developed during the Neoproterozoic Brasiliano cycle. The geochemical signature of the igneous rocks of the Lavalleja Group, mainly metagabbros and basic and acidic metavolcanic rocks, indicates a back-arc basin tectonic setting. The metamorphic grade increases to the southeast, from very low grade, lower green-schist facies, in the Minas Formation, to a medium grade, amphibolite facies, in Fuente del Puma and Zanja del Tigre Formations. The metamorphic mineral assemblages correspond to a low-pressure regional metamorphism associated with a high thermal gradient. A compressive deformational event that probably corresponds to the closure of the Lavalleja basin during a continental collision, was recognized. The petrology, geochemistry, metamorphic grade, and tectonic setting are consistent with a back-arc basin setting for the Lavalleja Group.
author	Cosarinsky, Mariana Ramos, Victor Alberto
author_facet	Cosarinsky, Mariana Ramos, Victor Alberto
author_sort	Cosarinsky, Mariana
title	Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
title_short	Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
title_full	Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
title_fullStr	Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
title_full_unstemmed	Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
title_sort	tectonic setting of the late proterozoic lavalleja group (dom feliciano belt), uruguay
publishDate	2001
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v4_n3_p395_Bettucci http://hdl.handle.net/20.500.12110/paper_1342937X_v4_n3_p395_Bettucci
work_keys_str_mv	AT cosarinskymariana tectonicsettingofthelateproterozoiclavallejagroupdomfelicianobelturuguay AT ramosvictoralberto tectonicsettingofthelateproterozoiclavallejagroupdomfelicianobelturuguay
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Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay

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