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Swiss Journal of Geosciences
Fig. 10 | Swiss Journal of Geosciences

Fig. 10

From: Deep hydrochemical section through the Central Alps: evolution of deep water in the continental upper crust and solute acquisition during water–rock-interaction along the Sedrun section of the Gotthard Base Tunnel

Fig. 10

Stable isotope composition of tunnel water with respect to GMWL (red). Inflow water follow a trend (orange) parallel to the GMWL with a shift of δ2H = 3 ‰ (black arrow). Also shown are the time series in the GM-Paragneiss (TM = 23.676 km) and Röti-dolomite of the UGZ (TM = 22.460 km) marked with red arrow. Accuracy of determination: δ18O ± 0.25 ‰, δ2H ± 1.5 ‰

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