Subduction interface processes recorded by eclogite-facies shear zones (Monviso, W. Alps)

► Several eclogite-facies shear zones across a coherent slice of oceanic lithosphere. ► Coexistence of brittle and plastic deformation within the lawsonite-eclogite facies. ► Dissemination of eclogite clasts along the Shear Zones. ► Locally pervasive fluid flow led to the crystallization of hydrated paragenesis.