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.
Highlights
The main rock types are a coarse grained gneiss, mi~ matites and granites
A geo1ogica1 mapping at the sca1e 1:50.000 based on air photographs at the scale 1:20.000 is being held near
which has been mapped as amphibolite sensu strictu
Summary
Os corpos graníticos da região de Frades (RJ), que são de especial importância na elucidação da geologia da Serra do Mar, foram somente estudados, at; o presente, em cariter regional por ROSIE R (1957, 1965) e EBE~T (1957, 1968). M.) da Secretaria de Estado de Comircio, Ind~stria e Turismo do Estado do Rio de Janeir o
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