Garnets in some metasomatic syenitic rocks of southwestern Japan

Abstract

In Southwest Japan, ugrandite garnests of various compositions are frequently found in the metasomatic syenitic rocks occurring in granites. Some of these garnests were separated, and studied chemically and optically. Their chemical compositions, and physical and optical properties are given in Table 2 and 3, respecitvely. The equilibrium relations between the garnests and some other coexisthing minerals such as hedenbergitic pyroxene, aegirine-augite, and plagioclase, are discussed in detail.