| Abstract |
There are various origins of high temperature hot springs in Japan, for example, separation from magma, heating meteoric water heated near volcanic area and hot sedimentary aquifer. Recently in several hot spring, small binary power generation projects are progressing. And several geothermal power plant project is progressing near hot spring field, we have to survey relationship between hot spring reservoir and geothermal reservoir to understanding for hot spring owners. To understand geothermal system including hot spring resorts, we survey the isotope behavior at several hot spring fields in Japan. For example, in Matsunoyama hot spring field, the binary power generation test is carried out using Takanoyu #3 hot spring fluid with about 100 degree C and 10,000 mg/l Cl. The hydrogen isotope ratio is about -20 |