T7[Topic] From magma source and magma plumbing system to volcano formation and hydrothermal alteration

[T7-P-30] Examination of primary magma segregation depth by olivine-augite maximum fractionation method : An example of the Katakurazawa lava flows from Akita-Komagatake volcano in the volcanic front, Northeast Japan arc

*Tomimasa HATAKEYAMA¹, Mitsuhiro YASUI^1,2, Masataka AIZAWA³, Takumi IMURA⁴, Takashi HOSHIDE⁵, Akira CHIBA⁵, Aoi HIRATA⁵, Kakeru SATO¹, Ryota SAWAFUJI¹, Ryo IMAI¹, Shigeki KODAMA¹, Yoshitada ASAKAWA¹, Tsukasa OHBA⁵, Masao BAN⁴, Ministry of Land, Infrastructure, Transport and Tourism Yuzawa Office of River and National Highway⁶ (1. Sohken consult. Co. Ltd., 2. Guide group of Happo-Shirakami Geopark, 3. Hokkaido Education University, 4. Yamagata University, 5. Akita University, 6. Ministry of Land, Infrastructure, Transport and Tourism Yuzawa Office of River and National Highway)

Keywords:

Northeast Japan arc,Akita-Komagatake volcano,Katakurazawa lava,Primary magma,Maximum fractionation method