Natural analogue study focused on trace elements of sedimentary and granitic rocks in Tono area, Gifu prefecture, Japan

Mizuno, Takashi   ; Nagata, Hiroshi ; Iwatsuki, Teruki  ; Honda, Teruyuki*

This paper aims to understanding the behavior of the elements related to the change of the chemical properties of sedimentary rocks and granitic rocks distributed in the Tono area, Gifu prefecture, using natural analogue approach. As a result, in the sedimentary rocks, it is indicated that REE and U are migrated in response to the change of pH and/or redox condition. These elements will be dissolved from the rocks and introduced into clayminerals, carbonate minerals and phosphate minerals. On the other hand, ingranitic rocks, these elements do not show the systematical variation. It is needed to more detail analysis (ex. chemical analysis of each separated minerals) for understanding their behavior in the granitic rocks.