The Kitomyo Schist from Kurosegawa Belt, Shikoku, has been long considered as the oldest records of subduction metamorphism in Japan, based on an early 1970s K-Ar dating of white mica. The schist consists of mafic and pelitic layers and occurs as ...
Owing to the detailed geological, petrological, and geochronological studies of the Ayukawa-Sanbagawa area (the type locality of the Sanbagawa metamorphic belt), Kanto Mountains, it is clarified that the Sanbagawa metamorphic belt consists of seve...