C-4: Physics and chemistry of melt and fluid and their roles in volcanic and igneous processes.

[PC4-04] Noble gas abundance and isotope ratios dissolved in lake and spring water at an active volcano, Mt. Zao, Japan, using new apparatus

*Keiko Sato^1,3, Hidenori Kumagai^2,3 (1. Sakura no Seibo Junior College (Japan), 2. Gakushuin Women's College (Japan), 3. Submarine Resources Research Center, JAMSTEC (Japan))

Keywords:Noble gas, isotope ratio, surface water, Zao volcano, mantle components