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Report No.

Data of groundwater chemistry obtained in the Horonobe Underground Research Laboratory Project (FY2020)

Miyakawa, Kazuya   

Development of technologies to investigate properties of deep geological environment and model development of geological environment have been pursued in "Geoscientific Research" in the Horonobe Underground Research Laboratory (HURL) project. In the fiscal year 2020, to proceed remaining important issues which were deduced from the conclusion of the investigations during the fiscal year 2015-2019, basic data such as groundwater chemistry need to be successively acquired. In the fiscal year 2020, groundwater was sampled from boreholes drilled in the 140 m, 250 m, 350 m gallery in the HURL, and water rings settled in three each vertical shaft, and groundwater chemistries of 41 samples were analyzed. Here, analytical results of groundwater chemistry such as physicochemical parameters, dissolved ions, oxygen and hydrogen isotope ratios, and tritium content, which were obtained in the fiscal year 2020, were reported along with a detailed description of analytical methods.



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