Magnetotelluric Interpretation Of The Geothermal System Of The Kuju Volcano, Southwest Japan

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Journal Article: Magnetotelluric Interpretation Of The Geothermal System Of The Kuju Volcano, Southwest Japan

Abstract
A magnetotelluric study was carried out in the Kuju volcanic area, southwest Japan, to clarify the geothermal structure of the volcanic body, as part of a fundamental study of the utilization of volcano energy conducted by the Geothermal Research Institute of Kyushu University. Two-dimensional (2-D) resistivity models based on MT data of the Kuju volcano and a three-dimensional (3-D) model of the Kuju-Iwoyama area have been constructed by a finite-element modeling technique. The 2-D models have shown some low-resistivity zones (less than 10 ohm-m) corresponding to fracture zones in the volcanic body. The 3-D model of the Kuju-Iwoyama area with the most intense geothermal activity, has revealed a very low-resistivity zone beneath the fumarolic area with a resistivity of the order of 1 ohm-m. Temperature, porosity and deposition of alteration minerals are considered as the causes of this low-resistivity zone.

Authors 
T. Mogi and S. Nakama








Published Journal 
Journal of Volcanology and Geothermal Research, 1993





DOI 
Not Provided
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Citation

T. Mogi,S. Nakama. 1993. Magnetotelluric Interpretation Of The Geothermal System Of The Kuju Volcano, Southwest Japan. Journal of Volcanology and Geothermal Research. (!) .