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| | Abstract | | The utilization of geophysical investigation in active fault survey is effective in clarifying subsurface fault structure in spatial manner. We conducted a high density CSAMT survey across the two active faults that had been conducted geophysical surveys such as reflection and gravity. The result of the investigation at the Aomori-wan west fault (AWF) shows the sharp low resistivity zone and displacement of low resistivity zone that were interpreted fault zone conductor (FZC) of AWF and displaced mud rock. The result of the investigation at the Senya fault shows the complex low resistivity structure that was interpreted displacement of mud rock caused by thrust-front migration. Thus the result which derived from CSAMT survey contributed to interpret fault structure in detail, we concluded that applying high density CSAMT survey combining with other geophysical survey to active fault is more effective. |
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