O CONGLOMERADO SAMBURÁ (GRUPO BAMBUÍ, NEOPROTEROZÓICO) E ROCHAS SEDIMENTARES ASSOCIADAS NO FLANCO LESTE DA SERRA DA PIMENTA, SW DE MINAS GERAIS: UM SISTEMA DE FAN DELTA.

Résumé

In the southwest part of São Francisco Craton occur neoproterozoic metasedimentary rocks of the Bambuí Group.  Among these rocks the Samburá Conglomerate outcrops nearby the external (eastern) region of the southernmost part of Brasilia Thrust Belt.  Sedimentological studies carried on these rocks at Serra da Pimenta region reveals that they belong to a fan delta system developed at the toes of thrust fault escarpments of Brasilia Thrust Belt. Petrographic analysis of clasts of Samburá Conglomerate pointed to Canastra Group and Pium-í greenstone belt rocks of Serra da Pimenta mountains as source rocks. The fan delta deposits are rested above shallow marine carbonate rocks of the base of Bambuí Group.