Rock and mineral chemistry of hydrothermal syenite in the Yasu Granite pluton, west of Lake Biwa, Shiga Prefecture, central Japan

Abstract

This report describes analytical results of bulk rock chemistry and mineral chemistry for the Yasu hydrothermal syenite, which underwent dequrtzfication, K-feldspathization, albitization, Fe-enrichment with mineralization characterized by sphalerite. In the assemblage and chemistry of minerals, the Yasu syenite is basically similar to the Hira hydrothermal syenite, but rather different in bulk rock chemistry.