TITLE

Ocorrência de rochas da fácies granulito no Cinturão Mineiro, Minas Gerais, Brasil

AUTHOR(S)
Gomes, Newton Souza; Evangelista, Hanna Jordt; de Medeiros Júnior, Edgar Batista; Filippo, Raphael Carneiro; Germano, Luciano Fernandes
PUB. DATE
July 2010
SOURCE
Rem: Revista Escola de Minas;Jul2010, Vol. 63 Issue 3, p433
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Paleoproterozoic granitoids intruding the Archean greenstone belt of Rio das Velhas are found in the region of Lagoa Dourada, which belongs to the Mineiro Belt. The granitoids are cut by amphibolitized mafic rocks which contain xenoliths of granulite facies rocks. The rocks are mafic granulites, characterized by their granoblastic texture and by parageneses orthopyroxene-clinopyroxene-amphiboleplagioclase. As secondary minerals, actinolite, carbonate, epidote, cummingtonite, garnet and quartz can be found. Geothermometric determinations based on the mineral pairs orthopyroxene-clinopyroxene and amphibole-plagioclase yielded temperature values between 700°C and 853°C. The secondary mineral phases are interpreted as a result of a younger metamorphic event.
ACCESSION #
54312626

 

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