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Bateman, K.*; Murayama, Shota*; Hanamachi, Yuji*; Wilson, J.*; Seta, Takamasa*; Amano, Yuki; Kubota, Mitsuru*; Ouchi, Yuji*; Tachi, Yukio
Minerals (Internet), 12(7), p.883_1 - 883_20, 2022/07
Times Cited Count：1 Percentile：0.02(Geochemistry & Geophysics)Bateman, K.; Murayama, Shota*; Hanamachi, Yuji*; Wilson, J.*; Seta, Takamasa*; Amano, Yuki; Kubota, Mitsuru*; Ouchi, Yuji*; Tachi, Yukio
Minerals (Internet), 11(9), p.1026_1 - 1026_23, 2021/09
Times Cited Count：2 Percentile：22.02(Geochemistry & Geophysics)Takeda, Masaki; Ono, Hirokazu; Tachi, Yukio; Murayama, Shota*
no journal, ,
This study characterized the solute transport properties of fault zone fractures in a mudstone by applying the modelling approach, which could be addressed heterogeneity in the fault zone fractures. Breakthrough curves (BTCs) derived from dipole tests were simulated with GoldSim code and the model assuming three flow paths individually consisted in the flow and stagnant domain. This modelling approach gave good agreement with the BTCs of uranine and Mo for pulse injection tests. However, there are some gaps of BTCs trend of uranine, Mo and Cs for continuous tests between in situ and simulation results. These gaps can be caused by larger tracer recovery in simulation results than tests results. We will continue to develope the more realistic model and optimal model parameters that can be appropriately treated to uncertainty of transport paths.
Murayama, Shota*; Takeda, Masaki; Ono, Hirokazu; Tachi, Yukio
no journal, ,
To evaluate mass transport in a fault zone containing multiple fractures, it is necessary to develop an mass transfer model based on the characteristics of the actual fault zone, and to conduct an in-situ tracer test. It is important to obtain information on the transport path and parameters through the tracer test. This paper presents the results of the tracer test conducted in a fault zone in the 350m research drift of Horonobe URL. The spatial distributions of the fractures and transport paths were evaluated based on the observation of the core sample collected after the tracer test and the tracer concentration analysis on the fracture surface. Furthermore, the transport model was applied and validated thorough the interpretation of the test results.
Fukatsu, Yuta; Akagi, Yosuke*; Sato, Hisao*; Murayama, Shota*; Ishidera, Takamitsu; Tachi, Yukio
no journal, ,
no abstracts in English
Murayama, Shota*; Fukatsu, Yuta; Ishidera, Takamitsu; Tachi, Yukio
no journal, ,
no abstracts in English
