The Rio Alegre volcanosedimentar sequence (SW Amazonian craton, Brazil): chemical and isotopes (U/Pb and Sm/Nd) constrains and tectonic implications - Matos, João Batista de; Schorscher, Johann Hans Daniel; Geraldes, Mauro Cesar; Souza, Maria Zélia Aguiar de (Workshop "Geology of the SW Amazonian Craton : State-of-the-Art", 2001)