GEOLOGICAL UNITS, AGES AND TECTONIC EVOLUTION OF THE NEOPROTEROZOIC DOM FELICIANO BELT, SOUTHERNMOST BRAZIL A REVIEW

JOSÉ CARLOS FRANTZ, MARCUS VINICIUS DORNELES REMUS, LÉO AFRANEO HARTMANN

Resumo


The Neoproterozoic Dom Feliciano Belt, southernmost Brazil, is divided in two the Western and Eastern Dom Feliciano Belts. The Western Belt consists of rock units related to juvenile accretion in a magmatic-arc while the Eastern Belt consists of rock units related to a continental collision. During the Brasiliano Cycle the evolution of these two different belts were integrated. The evolution of a juvenile magmatic arc/back-arc system in the Western Belt coincides with the closure of a passive platform-type basin with continental collision in the Eastern Belt. The collision between the juvenile magmatic arc and an older continental crust segment in the Western Belt can be the agent of a new compressive episode in the Eastern Belt with an intracontinental transpressive tectonics. These episodes were accomplished of an extensional tectonics in both belts.

Palavras-chave


Tectonic evolution; Neoproterozoic Dom Feliciano Belt; Southernmost Brazil.

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