Determination on the stable isotopic compositions of water vapor in volcanic plume using Cavity-ring down spectroscopy

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13914
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geochemistry/Cosmochemistry
• Research Institution: Nagoya University
• Principal Investigator: Tsunogai Urumu 名古屋大学, 環境学研究科, 教授 (50313367)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 水蒸気 / 火山ガス / 安定同位体 / 噴煙 / キャビティリングダウン分光分析 / 遠隔測定 / マグマ噴火 / 水蒸気噴火

Outline of Final Research Achievements

The stable isotopic compositions of water vapor emitted during volcanic eruptions can be useful tracers to differentiate magmatic eruption from phreatic eruption. In this study, a simple and convenient analytical system was developed to determine both concentration and stable isotopic compositions of atmospheric water vapor in volcanic plume sampled in glass bottles using Cavity-ring down spectroscopy. By using the analytical system developed in this study, we can estimate the stable isotopic compositions of water vapor in a volcanic fumarole remotely from those in volcanic plume derived from the volcanic fumarole.

Free Research Field

地球化学