Differentiation trends of granitoids from the Ryoke and Sanyo belts, eastern part of Yamaguchi Prefecture

Abstract

In this study, we investigate the magma processes of the granitoids from the Ryoke and Sanyo belts, the Yashiro district, eastern part of Yamaguchi prefecture, with respect to the Kfs-porphyritic granite, Rhoke belt, and the coarse-grained granite, Sanyo belt, in comparison with differentiation trends of these granitoids. Considering behavior of Nb and Y, and zircon saturation temperature, the coarse-grained granite would preserve a supra-solidus condition until 680˚C and was strongly influenced from fluid under the latest stage of its magma process.