1985 年 94 巻 6 号 p. 516-527
The main features of volcanic activities of Iwo-jima are unusual uplift of land and extensive geothermal activities. The rate of total heat discharge is estimated to be an order of 108 cal/sec, which is extremely large for the thermal output from a geothermal area. Part of such a large heat discharge rate must be transferred upward by high enthalpy magmatic gas. This deduction is consistent with geochemical data.