Development of a helium isotope ratio analysis system for volcanic activity monitoring

2016 Fiscal Year Final Research Report

• Project/Area Number: 26610179
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geochemistry/Cosmochemistry
• Research Institution: The University of Tokyo
• Principal Investigator: SUMINO Hirochika 東京大学, 大学院総合文化研究科, 准教授 (90332593)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ヘリウム / 同位体 / 火山活動 / 温泉ガス / 連続測定 / 伊豆大島 / 富士山 / 草津白根山

Outline of Final Research Achievements

In order to contribute early warning of volcanic eruptions, helium isotope ratio analysis system, which involves a simple gas extraction and helium purification system for hot- and cold-spring waters and a noble gas mass spectrometer, was developed. Helium isotope ratio distributions of volcanic gases and hot/cold spring waters around Izu-Oshima, Fuji, and Kusatsu-Shirane volcanoes were investigated to accumulate data on magmatic helium emission in a quiescent period and to clarify sampling sites for continuous monitoring in the future.

Free Research Field

同位体地球化学