Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Poster

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

[A-HW25] Isotope Hydrology 2018

Wed. May 23, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Masaya Yasuhara(Rissho Univ.)

[AHW25-P04] Study of volatile flux from magma of Aso volcano through shallow groundwater layer

*Masaaki Takahashi1, Kohei Kazahaya1, Tsutomu Sato1, Hiroshi A Takahashi1, Yuki Tosaki1, Yasuo Tomishima1, Noritoshi Morikawa1, Akinobu Miyakoshi1, Akihiko Inamura1, Jun Daimaru1, Hinako Shimizu1, Hiroko Handa1, Atsuko Nakama1 (1.The National Institute of Advanced Industrial Science and Technology)

Keywords:Aso, volatile flux from magma, river survey

In order to investigate the volatile flux from magma of Aso Volcano through shallow groundwater system, we are conducting river surveys in and around the Aso caldera area. According to the last year's survey, it was deduced that fluxes of S and Cl from magma of Aso Volcano through shallow groundwater system are 66 ton S/day (160kg/day/km2) and 30 ton Cl/day (70kg/day/km2). Calculated S and Cl fluxes are similar scale with those released by volcanic gases from the Aso volcano, 215 ton S/day and 16 ton Cl/day.

In this year, a river survey was conducted around the Aso caldera area (Midori, Kikuchi, Chikugo, Ono and Gokase Rivers). It is resulted that flow rate of S and Cl of those rivers are 3-11kg/day/km2 and 4-40kg/day/km2.

This study was supported by the Secretariat of the Nuclear Regulation Authority, Japan.