| Title | Nationwide Geothermal Exploration Survey Project (2nd Step) with Special Reference to the Hakkoda Area, Japan |
|---|---|
| Authors | Muraoka, Hirofumi; Hori, Hasao; Takagi, Shinichiro |
| Year | 1985 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Exploration; Japan; Hakkoda; Volcanics; Geology; K Ar; Gravity; Geophysics; CSAMT; Case History |
| Abstract | Geological, gravimetric and CSAMT surveys in the Hakkoda area, northeast Japan, were carried out. The Quaternary composite volcano systems are defined as Okiura caldera, southern Hakkoda volcano, Hakkoda caldera and northern Hakkoda volcano in historical order. Hot springs are exclusively associated with the oldest Okiura caldera and youngest northern Hakkoda volcano. However, the Shimoyu hot springs with the highest temperature in the area are significantly distant from them. All the methods consistently indicated that the Shimoyu hydrothermal system is developed along a reverse fault zone, and the heat may be ultimately supplied from the northern Hakkoda volcano. |