Geological evolution of the basement rocks in the central-eastern part of the Rondônia tin province, SW Amazonian craton, Brazil: U-Pb and Sm-Nd isotopic constraints - Payolla, Bruno Leonelo; Bettencourt, Jorge Silva; Kozuch, Marianne; Leite Junior, Washington Barbosa; Fetter, Allen Hutcheson; Van Schmus, William Randall (Workshop "Geology of the SW Amazonian Craton : State-of-the-Art", 2001)