supported by the CNPq/Universal Project(Grant No.485539/2012-8);the Instituto Nacional de Ciencia e Tecnologia de Geociencias da Amazonia(INCT/GEOCIAM; Grant No.610010/2009-3)
The southeastern Guyana Shield,northeast Amazonian Craton,in the north of Brazil,is part of a widespread orogenic belt developed during the Transamazonian orogenic cycle(2.26-1.95 Ga)that includes a large Archean cont...