UnB - Instituto de Geociências - Produção Científica
RESUMOS/ABSTRACTS de artigos publicados em revistas com corpo editorial
O COMPLEXO DE BARRO ALTO NA REGIÃO DE CERES - RUBIATABA, GOIÁS
JOSÉ CARUSO M. DANNI
REINHARDT A. FUCK
RAUL M. KUYUMJIAN
OTHON H. LEONARDO
MANFREDO WINGE
Revista Brasileira de Geociências( 1984)14(2):128-136
ABSTRACT
The geology of the westernmost part of the Barro Alto Complex is reviewed in the light of more detailed mapping and petrographic work. The complex is thrusted over Archean tonalitic basement and it is intruded by younger granitoids. Its rocks are formed by hypersthene-bearing granulites derived from (a) a plutonic suíte of banded gabbronorites, (b) massive intrusive gabbros and diorites, and (c) a supracrustal suíte of mafic to felsic volcanics interlayered with chert, iron formation, pelite and calc-silicate rocks. This is tentatively separated from the younger(?) and similar Serra da Malacacheta Sequence of layered mafic plutonics metamorphosed into garnet amphibolites, which upgrades into the Juscelândia metavolcanic-sedimentary Sequence. The Araxá Group is limited to a dull pile of chlorite-moscovite schists thrusted up both sequences.