Fig. 13From: 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 TunnelMajor dissolved components of water inflow (meq L−1) at observation point 23.676 (Paragneiss of the Gotthard-Massif) for different sampling dates (Schöller Diagram): Yellow–red data from 2006 and 2007, blue from 2008 and 2009. Mg below detection limit = 0.02 mg L−1 (log meq L−1 = − 2.78)Back to article page