Fluid emission along the Nankai Trough

Our most recent publication is now available on-line!

  • Tomonaga, Y., Yagasaki, K., Park, J.-O., Ashi, J., Toyoda, S., Takahata, N., & Sano, Y. (2020). Fluid emission along the Nankai Trough: He isotopes reveal direct seafloor mantle-fluid emission in the Kumano Basin (southwest Japan), ACS Earth Space Chem., doi:10.1021/acsearthspacechem.0c00229.

The work is directly related to the NoGOS project and the time I enjoyed working in the Marine Analytical Chemistry group at the Atmosphere and Ocean Research Institute (AORI) of the University of Tokyo.

Gas monitoring in Japan

At present we are installing an on-line gas monitoring system at an hydrothermal well in the city of Beppu (Oita Prefecture, Japan), along the Japan Median Tectonic Line. This project is performed within the frame of a scientific collaboration between the Institute of Geological Sciences of the University of Bern, the Swiss Federal Institute of Aquatic Science and Technology (Eawag) (Dr. Kipfer), the Atmosphere and Ocean Research Institute (AORI) of The University of Tokyo (Dr. Sano), and the Institute for Geothermal Sciences of Kyoto University (Dr. Shibata).

The monitoring aims to provide a comprehensive dataset to infer any possible relation between gas geochemistry and seismic activity in the surrounding region. The measurements will last until the end of May 2018.

Hydrothermal well sampling in Beppu (JP)

Here you can find a few images of the fieldwork conducted at the beginning of December in the region of Beppu (Japan).

Gas sampling performed by Dr. Kagoshima (Atmosphere and Ocean Research Institute, The University of Tokyo) and Dr. Shibata (Institute for Geothermal Sciences, Kyoto University).

A short visit at Umi Jigoku (one of the Hells of Beppu).