Contact metamorphism in metapelites from the Nova Lima group, Rio das Velhas supergroup, quadrilátero ferrífero: a monazite Th-U-Pb, dating by the electron-probe microanalyser - Vlach, Silvio Roberto Farias; Basei, Miguel Angelo Stipp; Campos Neto, Mario da Costa; Caby, Renaud (South American Symposium on Isotope Geology, 2003)