JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Poster

A (Atmospheric and Hydrospheric Sciences) » A-HW Hydrology & Water Environment

[A-HW35] [EJ] Isotope Hydrology 2017

Sat. May 20, 2017 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL7)

[AHW35-P05] Preliminary study of volatile flux from magma of Aso volcano through shallow groundwater layer, Kumamoto Prefecture, Southwest Japan

*Masaaki Takahashi1, Kohei Kazahaya1, Tsutomu Sato1, Hiroshi A Takahashi1, Akinobu Miyakoshi1, Yuki Tosaki1, Noritoshi Morikawa1, Akihiko Inamura1, Jun Daimaru1, Hiroko Handa1, Atsuko Nakama1, Hinako Shimizu1, Hisako Takeuchi1 (1.The National Institute of Advanced Industrial Science and Technology)

Keywords:Aso caldera, groundwater and river survey, volatile flux of magma, hydrogen and oxygen isotopic ratio

Volatile flux of magma of Aso volcano through shallow ground water layer is preliminary studied by groundwater and river (Shirakawa, Kurokawa and Midorikawa) surveys in Aso caldera and adjacent areas.
Flow rates of S and Cl of Kurokawa river (Ofuchi Bridge, Aso-dani, Akamizu) are 53.7ton/day and 25ton/day, and of Shirakawa river (Myoken Bridge, Nango-dani, Kain) are 12.3ton/day and 5.4ton/day, respectively.
It is necessary to understand volatile flux of magma of Aso volcano through shallow groundwater layer considering the amount of sulfur and chlorine supplied from rainfall or strata, or the influence of hot spring water (deep groundwater) to shallow groundwater layer.
This study was supported by the Secretariat of the Nuclear Regulation Authority, Japan.