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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: Original composition and formation process of slab-derived deep brine from Kashio mineral spring in central Japan

Fig. 7

Relationship between the 4He/20Ne ratio and 20Ne concentrations in the Kashio A samples. The gray solid curve indicates the trend by adding air to the sample KNK-16-M005 up to 4.0 × 10−2 cm3STP per 10 g of sample water, based on the concentration of He and Ne and their stable isotope ratio of air (Ozima and Podosek 2002). Numbers along the curve indicate the amount of air added (cm3STP per 10 g of sample water). The variation of 4He/20Ne ratio and 20Ne concentration in Kashio A samples is clearly explained by air contamination

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