Fig. 1

Geotectonic map of the Sesia Zone (after Manzotti et al. 2014; Regis et al. 2015; Giuntoli and Engi 2016) showing age data for the pre-Alpine metamorphism in the Eclogitic Micaschist Complex. Age data are from: (1) Bussy et al. (1998); (2) Cenki-Tok et al. (2011); (3) Kunz et al. (2018); (4) Paquette et al. (1989); (5) Regis et al. (2014); (6) Rubatto (1998); (7) Rubatto et al. (1999) and (8) this study. P–T paths for the EMC are from: (1) Lardeaux and Spalla (1991); (2) Rebay and Spalla (2001); (3) Giuntoli et al. (2018a)