Deutsch: Tsaté-Decke
Français: Nappe du Tsaté
Italiano: Falda del Tsaté
English: Tsaté Nappe
The Tsaté Nappe is an Upper Penninic tectonic unit of the Western Alps cropping out in southern Valais and in the Valle d’Aosta. It comprises oceanic metasediments (mainly calcschists and black shales of Cretaceous age) and ophiolitic rocks of Jurassic age originating from the Piemonte-Liguria Ocean. This nappe is characterized by a chaotic aspect and metamorphism under conditions of blueschist facies followed by greenschist facies. It is interpreted as the result of the formation of an accretionary wedge at the foot of the active Adriatic margin and the subsequent subduction below this continental plate.
Alpage du Tsaté (VS)
nappe du Tsaté (Sartori 1987, Escher et al. 1988, Marthaler & Stampfli 1989), zone du Combin auct., Upper ophiolitic units = Combin Zone Auct. = Tsaté nappe (Dal Piaz et al. 2015), Tsaté nappe (Steck et al. 2015), «zone du Combin» auct., Tsaté Nappe (TK500, Gouffon et al. 2024)