Allanite subgroup minerals associated with granitic rocks in Innor Zone of Southwest Japan

Abstract

As a result of my research, it became clear that there were differences in amounts of Mn and REE of allanite subgroup minerals between granitic rocks and pegmatite in Innor Zone of southwest Japan. Behavior of Mn and REE may be different between Hiroshima granitic pegmatite and Ryoke granitic pegmatite. Allanite subgroup minerals of the pegmatite in Innor Zone of southwest Japan are characterized to be rich in Mn, Y, MREE and HREE. On the other hand, allanite subgroup minerals of granitic rocks are rich in LREE, and poor in Mn and Y. Moreover, uedaite-(Ce) was found out at 4 localities of Tateiwa Mine, Sho Mine, Ishitegawa dam and Omishima Island. In addition, the mineral corresponding to phase of uedaite-(Y) was also discovered.