Open AccessContribuição à Geologia da Região de Frades, Município de Teresópolis (Rio de Janeiro)
Author(s) -
João Baptista de Oliveira e Souza Filho,
Benedito Souza Gomes,
Francisco José da Silva
Publication year - 1977
Publication title -
anuário do instituto de geociências
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.202
H-Index - 12
eISSN - 1982-3908
pISSN - 0101-9759
DOI - 10.11137/1977_0_129-134
Subject(s) - migmatite , gneiss , geology , schist , metamorphic rock , geochemistry , geography , humanities , art
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.