岩泉町付近の含ざくろ石熱変成岩について

概要

論文の詳細を見る
The petrological characters of garnet-bearing thermally metamorphosed rocks from the Nake sate district are treated with the brief description of general thermal metamorphism in the present district. For the purpose to clarify the metamorphic conditions, chemical analyses of metamorphic rocks, biotites and garnets have been carried out. In the present district, garnet is found restricted only in the politic thin layers laminated within highly metamorphosed compact chert, while curdierite appears in the hornfelses of common argillaceous rock origin. There is no difference in MnO-MgO-FeO ratio between the garnet-bearing and garnet-free rocks, while in AKF diagram they show distinct difference in Al_2O_3 content. It may be due to their chemical peculiarity that garnet does not appear in the metamorphic rocks of common argillaceous rock origin.
地学団体研究会の論文
1963-09-25