Geochemistry and Nd Isotopic evidence of the pensamiento granitoid complex, Rondonian-San Ignacio province, eastern precambrian shield of Bolivia: petrogenetic constraints for a plutonic arc - Matos, Ramiro; Teixeira, Wilson; Cordani, Umberto G.; Geraldes, Mauro Cesar; Bettencourt, Jorge Silva; Sato, Kei (South American Symposium on Isotope Geology, 2008)