dependent. For assemblages with excess hematite. albite, muscovite and quartz, the paragenetic relations...system A1203-F~03-Fe0-MgO-Ca0 with excess quartz, albite and muscovite. A few authors have dealt with the...the one with excess Fe03. The Sanbagawa belt in Japan is suited to the study of this problem because of...in the system with excess FeO,. in the Asemi-gawa (river) area of the Sanbagawa belt in central Shikoku...address: JEOL Ltd, 3-1-2, Musashino-Akishima. Tokyo, Japan. the textural relationships and chemical heterogeneity |