U-Pb SHRIMP and Sm-Nd analysis for Ribeira belt mesoproterozoic and neoproterozoic terranes - Campanha, Ginaldo Ademar da Cruz; Tassinari, Colombo Celso Gaeta; Basei, Miguel Angelo Stipp; Nutman, Allen; Feleiros, F. M. (South American Symposium on Isotope Geology, 2008)