R6: Plutonic rocks, volcanic rocks and subduction factory

[R6-P-13] Differentiation Processes of Granitic Magma Chamber Recorded in 'Oshima-ishi' Distributed in Oshima, Geiyo islands, Ehime Prefecture

*Kazuya SHIMOOKA^1,2, Soichiro AONO², Takahito ONISHI², Toko FUKUI², Motohiro TSUBOI¹, Toshiro TAKAHASHI³, Satoshi SAITO² (1. Kwansei Gakuin Univ., 2. Ehime Univ., 3. Niigata Univ.)

Keywords:Oshima-ishi, Cretaceous granitoids, Differentiation Processes, Mafic magma, Oshima, Geiyo islands