Trace element geochemistry and Sr-Nd characteristics of mesoproterozoic mafic intrusive rocks from Rondonia, Sw Amazonian craton: new petrogenetic insights - Girardi, Vicente Antonio Vitorio; Teixeira, Wilson; Bettencourt, Jorge Silva; Andrade, Sandra; Navarro, Margareth Sugano; Sato, Kei (South American Symposium on Isotope Geology, 2008)