Research Article
Volcanogenic CO2 Degassing in the Songliao Continental Rift System, NE China
Table 1
Chemical and C-He isotopic compositions of the spring gases in the WMVF.
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(1) is the observed 3He/4He ratio divided by the 3He/4He ratio in the air (, [42]). (2) , where β represents the Bunsen coefficients assuming a groundwater recharge temperature of 10°C (βNe/βHe = 1.25, [43]), (4He/20Ne)M is the measured ratio of samples, and (4He/20Ne)Air is the ratio of the air (0.32, [42]). (3) is the air-corrected Helium isotope ratio by applying the following formula [44]: . |