[A-HW23] Tracer Hydrology: Advances in Measurement and Modelling

[AHW23-P03] Long-term on-line gas monitoring at Mt. Fuji – What do we learn (from a hydrological and geochemical perspective)?

*Yama Tomonaga^1,2, Stephanie Lisa Musy¹, Friederike Currle¹, Naoto Takahata³, Yuji Sano⁴, Oliver S. Schilling^1,5 (1.Hydrogeology, Department of Environmental Sciences, University of Basel, Switzerland, 2.Entracers GmbH, Duebendorf, Switzerland, 3.Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan, 4.Marine Core Research Institute, Kochi University, Kochi, Japan, 5.Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland)

Keywords:noble gases, GE-MIMS, groundwater, seismicity, flow dynamics

A portable mass spectrometer system (also known as miniRUEDI; Brennwald et al., 2016) was installed at a drinking water pumping station close to Mt. Fuji to analyze the gas composition in the extracted water. Previously, such an analytical setup has been shown to allow a reliable and robust continuous on-site monitoring of gases in environmental (e.g., Giroud et al., 2023) and engineered systems (e.g., Tomonaga et al., 2019).
With this contribution we would like to present the insights delivered by the on-line gas monitoring conducted at Mt. Fuji and stimulate a discussion on the potential of the chosen approach from a hydrological and geochemical perspective.


References

- Brennwald, M. S., Schmidt, M., Oser, J., & Kipfer, R. (2016). A portable and autonomous mass spectrometric system for on-site environmental gas analysis. Environ. Sci. Technol. 50(24), 13455–13463, doi:10.1021/acs.est.6b03669.

- Giroud, S., Tomonaga, Y., Brennwald, M. S., Takahata, N., Shibata, T., Sano, Y., & Kipfer, R. (2023). New experimental approaches enabling the continuous monitoring of gas species in hydrothermal fluids. Front. Water, 4, 1032094, doi:10.3389/frwa.2022.1032094.

- Tomonaga, Y., Giroud, N., Brennwald, M. S., Horstmann, E., Diomidis, N., Kipfer, R., & Wersin, P. (2019). On-line monitoring of the gas composition in the Full-scale Emplacement experiment at Mont Terri (Switzerland). Appl. Geochem., 100, 234-243, doi:10.1016/j.apgeochem.2018.11.015.