Contribuição à Geologia da Região de Frades, Município de Teresópolis (Rio de Janeiro)

João Baptista Filho, Benedito Souza Gomes, Francisco José da Silva

Abstract


A geological mapping at the scale 1:50,000 based on air photographs at the scale 1:20.000 is being held near Frades, a small village between Teresopolis and Nova Friburgo, State of Rio de Janeiro, Brazil. The main rock types are a coarse grained gneiss, migmatites and granites. The pigmatites exibits a dark differentiate (melanosome), sometimes widespread in area, which has been mapped as amphibolite sensu strictu. The latter, until now considered of magmatic origin, seems to have formed through migmatization processes.



DOI: https://doi.org/10.11137/1977_0_129-134

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