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Report No.

Provenance analysis to understand formation and development of mountains

Niwa, Masakazu  ; Shimizu, Mayuko  ; Yasue, Kenichi; Nishimura, Shusaku; Amamiya, Hiroki; Ueki, Tadamasa; Horiuchi, Yasuharu

Uplift and associated denudation of mountains affect hydraulic gradient and groundwater flow path. In the case of a safety assessment for geological disposal of radioactive wastes, uplift and denudation will be examined in terms of nuclide migration driven by deep groundwater as well as potential exposure of repositories. Provenance analysis based on sedimentological, petrological, mineralogical and geochemical approaches in downstream area is often helpful for understanding onset times and processes of uplift and associated denudation of mountains in upstream area. In this study, quick quantification analysis for heavy minerals and measurement of electron spin resonance signal for quartz to estimate provenance rocks, and paleo-current analysis using magnetic anisotropy of susceptibility for fine sand were developed.



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