Fig. 8

Schematic profile from Domodossola to the Kander valley depicting the temperature distribution. RSCM data were projected into the plane of the cross section. Color coding for temperature is shown above the profile. Small inset map (top right) shows metamorphic reaction isograds and maximum isotherms within the Aar/Gotthard massifs and northern Lepontine dome and the traces of the two cross section parts. For reference only, a geothermal gradient of 25 °C/km is shown to the left of the section. Cross section A–A′ inspired by Ziegler and Isler (2013) and Herwegh and Pfiffner (2005), cross section B–B′ modified after Campani et al. (2014). The data point at the 600 °C isotherm in the south is based on sample Si9410 of Todd and Engi (1997). The slight shift between the contour line and the single data point is based on the contouring. ZSC Zone of Sion Courmayeur (Valaisan), FAP fold axial plane