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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

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

Fig. 2

Hydrochemical classification based on trilinear diagram. a Comparison between surface waters and groundwaters from hot spring sites. b Classification of three different types of groundwaters from hot spring sites. c Difference in Cl− concentrations among three types of fluids. d Diversity in HCO3− concentrations among three types of fluids

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