Hornblende fractionation in high-K tholeiitic magmas: evidence from the Yoneyama Formation of central Japan for a hydrous magma differentiation

Masataka Aizawa, University of the Ryukyus, Okinawa, Japan, Satoshi Okamura, Hokkaido Education Univ, Sapporo, Japan, Toshiro Takahashi, Niigata University, Niigata, Japan, Ryuichi Shinjo, Univ Ryukyus, Nishihara, Okinawa, Japan and Yoneyama Research Group