Geochemistry of an Early Proterozoic Basic Granulite-Gneiss Suite and Petrogenetic Implications, Arunta Inlier, Central Australia

Abstract Granulite-gneiss terrains of the southwestern Arunta Inlier, central Australia, include basic granulites pervasively intruded by stringers, bands, lenses and stocks of gneiss. The basic granulites include LIL element-depleted types, continental tholeiitic compositions and Fe-rich garnetiferous granulites. All display light/heavy REE enrichment. The basic granulites include layered anorthosite-pyroxenite units, including both LIL element-depleted and LIL element-enriched meta-cumulates. Comparisons between depleted and enriched basic granulites suggest LIL element mobility in the increasing sequence: Sr