Behavior of trace elements in the fault and altered zones of the Toki granite

Arai, Yusuke*; Honda, Teruyuki*; Iwatsuki, Teruki  ; Nomura, Masao*

Rare earth elements (REEs) in altered part and fault of Toki granite were analyzed to understand mobility in deep environment. REEs occurs in an oxidized minerals at altered part, in a carbonates and ion exchangeable minerals at fault, respectively. Light REEs tend to be involved in sulphide or phosphorate minerals and heavy REEs seem to be in clay, carbonate minerals. These results imply that the migration of minor actinoides in granite might be retarded by such minerals in fracture and fault.