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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Origins and pathways of deeply derived carbon and fluids observed in hot spring waters from non-active volcanic fields, western Kumamoto, Japan

Fig. 3

δ2H versus δ18O diagrams. ad Isotopic signatures for the surface waters, High-Cl, Low-concentration, and High-HCO3 fluids, respectively. Isotopic compositional field for hypothesized magmatic water is after Giggenbach (1992). Local meteoric water line in Kumamoto (ca. 20 km northeast from Uto district) is after Okumura et al. (2018)

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