Evaluation of a potential supercritical geothermal system in the Kuju region, central Kyushu, Japan

Keigo Kitamura, Yuki Fujii, Haruhiro Inagaki, Koki Aizawa, Jun ichiro Ishibashi, Hiroki Saito, Yasuhiro Fujimitsu

Research output: Contribution to journalArticlepeer-review

Abstract

We derived the thermal structure of the Kuju region of volcanic activity in central Kyushu, Japan, to assess the potential existence of a supercritical geothermal system. Extrapolation of existing well-logging data suggests the presence of a high-temperature region beneath the area between the Hatchobaru geothermal power plant and Kuju-Iwoyama Volcano, which closely overlaps a low-resistivity body estimated from magnetotelluric data. Based on estimated temperatures exceeding 380 °C at the relatively shallow depth of -3.3 km above sea level, and considering evidence for magmatic fluid transport, this high-temperature region is a potential target for a supercritical geothermal reservoir.

Original languageEnglish
Article number102602
JournalGeothermics
Volume107
DOIs
Publication statusPublished - Jan 2023

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Geotechnical Engineering and Engineering Geology
  • Geology

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