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| | Abstract | | 3-D inversion development has been conducted to solve issues in electromagnetic exploration as one of the technologies for the geological disposal of high-level radioactive waste. We applied 3-D MT and AMT methods to confirm the ability of fault detection and to study the possibility for estimating the distribution of salinity concentration in groundwater. 3-D MT result suggests the existing of Omagari fault and deep resistivity structure corresponding to nearby anti/syncline distribution show not horizontal but irregular shape corresponding to these (fault and anti/syncline's) locations. This trend is clear in south part of investigation area, becomes gradually unclear in north part of the area and is consistent with interpreted geological structure. 3-D AMT method indicates possibility to be able to estimate salinity distribution of groundwater in the area, because salinity concentration of pore-water by drilled core measurements consisted with analyzed resistivity. |
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