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The electrical resistivity of drilled core from the Hokuroku district, northern part of Akita Prefecture, were measured by the Four-Electrode method. The measurements were carried out under the condition that the sample had been super-saturated with water.The electrical resistivities of the rocks show such characteristics as follows;1) A close correlation is found between resistivity and water content.2) The relation between resistivity ρ (ohm cm) and water content X (weight %) is given by a formula log ρ=A-BX, were A and B are the constants related to rock type respectively and they are very sensitive to the change of rock facies.These fundamental relations may suggest a useful measure to respect of rock body condition.
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