Details of the Abstract
| Title of paper | Three-dimensional resistivity structure around Beppu geothermal zone |
| List of authors | Aizawa, K., Yamamoto, Y., Muramatsu, D., Aniya, S., Tanabe, H., Wakabayashi, A., Fujita, S., Shito, A., Koyama, T., Shiozaki, I., Ichiki, M. |
| Affiliation(s) | Kyushu University, Kyushu University, Kyushu University, Kyushu University, Kyushu University, Kyushu University, Kyushu University, Kyushu University, University of Tokyo, Tottori University, Tohoku University |
| Summary | To delineate fluid pathways and associated heat sources, we conducted broadband magnetotelluric (MT) surveys from 2014 to 2020 around Beppu geothermal field. The resultant resistivity structure shows two conductors situated beneath southwestern side of Garan volcano and beneath Beppu bay at depth of 3~8 km. The earthquake swarms in 2007 occurred within a resistive zone sandwiched by the two conductors. Other seismicity occurred at resistive zones. Therefore, we interpret the conductive zones as ductile zones with temperatures exceeding 400°C. There are two heat sources for Beppu hot springs: one is located beneath southwestern side of Garan volcano, another is located beneath Beppu Bay. |
| Session Keyword | 4.0 Tectonics and geodynamics, including magmatism |
| File upload |
4.0_three-dimensional_resisti_aizawa_01.pdf
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