U-PB geochronology of granitoid rocks in the southern portion of São Francisco Craton: new insights on the paleoproterozoic evolution of the mineiro belt - Barbosa, Natali; Teixeira, Wilson; Avila, Ciro Alexandre; Bongiolo, Everton Marques; Passamani, Fernanda Monteiro; Silva, Marize Muniz da (South American Symposium on Isotope Geology, 2012)