The Re-Os isotopic systematics and PGE signatures of chromites from the Campo Formoso and Jacuri valley mafic-ultramafic stratiform complexes of northern Bahia, Brazil - Kirk, Jason Donald; Correia, Ciro Teixeira; Girardi, Vicente Antonio Vitorio; Petronilho, Liliane Aparecida; Sá, José Haroldo da Silva; Oliveira, P. H. (South American Symposium on Isotope Geology, 2008)