Volcanogenic CO₂ Degassing in the Songliao Continental Rift System, NE China

Figure 5

Triangle plot of N₂-He-Ar (a) and CO₂-³He-⁴He (b) for the cold spring gases in WMVF (modified from Giggenbach et al. [47]). Filled and open symbols represent, respectively, data in this study and published data in [18–22, 48]. The compiled data in previous studies are available in Supplementary Table S3. Abbreviations: NYQ: South spring; BYQ: North spring; FHQ: Fanhua spring; HLQ: Hualin spring; ASW: air-saturated water; Arc average: arc-related volatiles (, [49]; , [46]); SCLM: subcontinental lithospheric mantle (, [50]; , [51]); DMM: depleted MORB-source mantle (, [52]; , [46]).

(a)

(b)