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. 2020 May 4;28(5):1871–1890. doi: 10.1007/s10040-020-02153-7

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© The Author(s) 2020

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Fig. 5 — a Stable isotopic ratios of water samples from the springs (SP), the waterfall above the Central Cone (WF), the meadow stream (MS), one of the lakeshore groundwater discharge points (GD), and Hathataga Lake. b Dissolved Ca and SO₄ concentrations of water samples. All samples were collected during July 14–28, 2015