Preservation of Permian allanite within an Alpine eclogite facies shear zone at Mt Mucrone, Italy: Mechanical and chemical behavior of allanite during mylonitization

► Preservation of Permian allanite within an Alpine eclogite facies shear zone. ► Mechanical and chemical shielding of allanite during mylonite formation. ► Remarkable resistance to deformation of allanite. ► Permian veins reworked as ductile shear zones of during Alpine orogeny. ► Scattered Alpine ages for partially recrystallized allanite in undeformed rocks.