Extended Data Fig. 2: Carbon and Radiocarbon data from the groundwater samples.
From: Passive degassing of lithospheric volatiles recorded in shallow young groundwater
Symbol colour correlates to the Δ40Ar of each groundwater sample (n = 17). a) The δ13C of dissolved oxygen concentration (DIC) as a function of DIC concentration. There is no correlation between δ13C and concentration. b) The δ13C of DIC vs radiocarbon in percent modern carbon (pmC). c) depth of groundwater well vs radiocarbon residence time (years). The four crustal samples identified in Fig. 2 are the shallow samples with residence times <10,000years and lowest Δ40Ar.
