活火山性温泉活動と水素同位体組成の偏り : 北海道登別温泉活動

概要

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It bears an important meaning in considering the evolution of the earth crust and the development of the ocean to clarify the characteristics of isotopic composition of the hydrogen in the earth crust or in magma, and compare them with that of fresh and oceanic water. The isotopic composition of the hydrogen exhaled onto the surface from the depth through volcanic hot springs is considered to show the original composition in the magma, in more un-contaminated form than the case of fresh or oceanic water. In this paper, the result of analyses of the isotopic composition of the hydrogen exhaled by volcanic hydrothermal activity at Noboribetsu, one of the most typical volcanic hot springs in Japan, is described. It is found that the protium in the hot spring shows higher ratio than in fresh water, and that the isotopic composition of the hydrogen varies with the variation of hydrothermal activity. It is considered that this variation in isotopic composition of the hydrogen is closely related to boiling phenomenon of the hydrothermal water.
特定非営利活動法人日本火山学会の論文
1961-06-30