Evidence of Tectonic Control on the Geochemical Features of the Volatiles Vented along the Nebrodi-Peloritani Mts (Southern Apennine Chain, Italy)

Figure 3

Helium isotopes (normalized to the atmosphere) vs. ⁴He/²⁰Ne ratios. The samples represent a mixing between the atmosphere and a radiogenic-type end member. The mixing boundary lines are built with the following end members: atmosphere (as dissolved air) vs. ; mantle (Sub Continental European Mantle (SCEM)) vs (Dunai and Baur [59]); and continental crust vs. . Symbols and labels are as in Figure 2 (dissolved gas samples). Open blue marks refer to bubbling gases from Peloritani Mts.