On the Petrochemical Character of the Pelitic Gneiss from the Southwestern Part in the Hida Metamorphic Belt, Central Japan

In the Hida Metamorphic Belt, metapelites develop in a small amount, in contrast to wide development of basic and calcareous metamorphites. The metapelites in the district have been clarified to be higher in CaO, FeO and MgO contents while lower in Al-excess as compared to the usual metapelite. Judged from the petrochemical characteristics and the mode of occurrence, it is probable that the metapelites in question should not be derived from rocks of "miogeosynclinal" character of higher maturity, but from those intermingled with basic volcanic materials. Also have been discussed the similarity and the difference between the metapelites from other high T-low P type metamorphic belts in Japan along with the Precambrian metapelites from the Kamiaso conglomerate.