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Facilities Methods Publications

First dating of an early Chibanian glacial overdeepening in the Alpine Foreland

Within the frame of a collaborative work involving the Eawag, the University of Basel, Nagra, and the University of Bern it was possible for the first time to date sediments deposited during the early Chibanian (Middle Pleistocene) using the 4He/U-Th medod. The respective article accepted by Geology and is freely available at the following address:

Tomonaga, Y., Buechi, M.W., Deplazes., G., & Kipfer, R. (in press). First dating of an early Chibanian (Middle Pleistocene) glacial overdeepening in the Alpine Foreland using the 4He/U-Th method. Geology, doi:10.1130/G52544.1.

At Entracers we now have all the know-how and technical means to apply the newly developed method applied to determine the radiogenic 4He concentrations in the pore water of coarse/semi-consolidated sediments as those found in the Hochfelden-Strassberg drilling!

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Publications

Revisiting Mt Fuji’s groundwater origins

Please enjoy the first research article of Nature Water which underlines the potential of on-site gas analyses in combination with other environmental tracers:

  • Schilling, O.S., Nagaosa, K., Schilling, T.U., Brennwald, M.S., Sohrin, R., Tomonaga, Y., Brunner, P., Kipfer, R., & Kato, K. (2023). Revisiting Mt Fuji’s groundwater origins with helium, vanadium and environmental DNA tracers. Nat. Water, 1, 60–73, doi:10.1038/s44221-022-00001-4.
Categories
Methods Publications

Gas-bentonite interactions in Engineered Barrier Systems

A collaborative research project involving the Swiss Federal Institute of Aquatic Science and Technology, the Institute of Geological Sciences at the University of Bern, and Posiva Oy targeted gas-bentonite interactions in relation to the gas dynamics in Engineered Barrier Systems. The outcome of the study has been published in the following open access article:

  • Tomonaga, Y., Wersin, P., Rufer, D., Pastina, B., Koho, P., Ville, H., & Kipfer, R. (2022). Gas-bentonite interactions: Towards a better understanding of gas dynamics in Engineered Barrier Systems. Appl. Geochem., 138, 105205, doi:10.1016/j.apgeochem.2022.105205.

Interested in conducting further investigations based on the same methods? Entracers GmbH can now provide the required know-how as well as the related analytical facilities!