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Abstract:

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.

Registro:

Documento: Artículo
Título:Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay
Autor:Bettucci, L.S.; Cosarinsky, M.; Ramos, V.A.
Filiación:Depto. de Geología, Facultad de Ciencias, Univ. de la Republica, Uruguay
Depto. de Geología, Fac. de Ciencias Exactas y Naturales, UBA, Argentina
Palabras clave:Back-arc basin; Brasiliano cycle; Lavalleja Group; Neoproterozoic; Uruguay
Año:2001
Volumen:4
Número:3
Página de inicio:395
Página de fin:407
DOI: http://dx.doi.org/10.1016/S1342-937X(05)70339-7
Título revista:Gondwana Research
Título revista abreviado:Gondwana Res.
ISSN:1342937X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v4_n3_p395_Bettucci

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Citas:

---------- APA ----------
Bettucci, L.S., Cosarinsky, M. & Ramos, V.A. (2001) . Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay. Gondwana Research, 4(3), 395-407.
http://dx.doi.org/10.1016/S1342-937X(05)70339-7
---------- CHICAGO ----------
Bettucci, L.S., Cosarinsky, M., Ramos, V.A. "Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay" . Gondwana Research 4, no. 3 (2001) : 395-407.
http://dx.doi.org/10.1016/S1342-937X(05)70339-7
---------- MLA ----------
Bettucci, L.S., Cosarinsky, M., Ramos, V.A. "Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay" . Gondwana Research, vol. 4, no. 3, 2001, pp. 395-407.
http://dx.doi.org/10.1016/S1342-937X(05)70339-7
---------- VANCOUVER ----------
Bettucci, L.S., Cosarinsky, M., Ramos, V.A. Tectonic Setting of the Late Proterozoic Lavalleja Group (Dom Feliciano Belt), Uruguay. Gondwana Res. 2001;4(3):395-407.
http://dx.doi.org/10.1016/S1342-937X(05)70339-7