Development and Application of high frequency auto sampling tool for volcanic fluids near the craters

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04100
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17040:Solid earth sciences-related
• Research Institution: The University of Tokyo
• Principal Investigator: MORI TOSHIYA 東京大学, 大学院理学系研究科(理学部), 准教授 (40272463)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 火山性流体 / 自動採取 / 温泉水 / 噴気ガス / 蒸気井

Outline of Final Research Achievements

Geochemical monitoring of volcanic fluids has a potential to detect the changes beneath the volcanoes. In previous studies, most of the geochemical data were obtained by sampling and laboratory analyses by reseachers. Thus, the data frequencies were usually low and detailed discussion for temporal variation was difficult. To overcome this problem, high frequency autosampling tools for volcanic fluids for both water and gas samples were developed using small CNC ( computer numerical control ) instruments and were tested and validated for variouis kind of volcanic fluids including hot spring waters, soil gas, fumarolic gas from steam-well and etc.

Free Research Field

火山化学

Academic Significance and Societal Importance of the Research Achievements

これまでの多くの火山性流体の地球化学的研究では、データ頻度が低く、火山活動の時間変化を詳細にに議論することは難しかった。本研究課題では、火山性流体の液体試料および気体試料に対応した高頻度自動採取装置を開発し、様々な形態の火山性流体試料の高頻度自動採取を行うことで、高頻度採取の有効性を示した。本研究課題で開発した装置のような方法で、火山性流体の高頻度採取が行われるようになれば、地球化学的データをより有効に利用して、火山現象の理解や火山活動評価が進展するものと期待される。