Extended Data Fig. 3: Triple Argon Plot (δ40Ar/36Ar vs δ38Ar/36Ar) for the groundwater samples (n = 17).
From: Passive degassing of lithospheric volatiles recorded in shallow young groundwater
Mean ± 1σ uncertainties shown, where no errors are shown these are within symbol size. Unfilled samples represent the four “Crustal” samples (Main text). There is no correlation between the two parameters and therefore changes in δ40Ar/36Ar are not a result of fractionation.
