Mineralogical Study of Gravity Concentrate of Uranium Ore from Suishoyama Pegmatite, Fukushima Prefecture

Abstract

The mineral composition of the gravity concentrate of uranium ore from Suishoyama pegmatitedeposit, Fukushima Pref. has been determined. Though many rare minerals from this district havebeen described by several authors, it is shown that the only quantatively important ones constitutingthis concentrate are uraninite, samarskite, fergusonite, columbite and wolframite. From the mineralogical composition it is proved that more than 80% of the uranium is contained in uraninite andthe rest is in fergusonite and samarskite.
Magnetic and electrostatic responses of these minerals are given.