Summary of the main metamorphic mineral sequence and P–T paths of the studied samples. (A) Reconstructed P–T paths for samples AR736, see text for details. (B) Simplified petrological model for sample AR736 showing the garnet and staurolite evolutions and their relationships with the metamorphic stages, crystallisation of monazite (in orange) and ages: (1) Nucleation and crystallisation of garnet and staurolite along the prograde path and incorporation of inclusions near the peak of pressure; (2) beginning of decompression path and peak of metamorphism associated with staurolite resorption, garnet slight resorption and crystallisation of monazite starting at 330 ± 6 Ma; (3) Garnet breakdowns and monazite crystallisation continues. Dextral shearing partially or totally recrystallized older monazite grains assisted by aqueous fluids until 305 Ma. The staurolite rims crystallize around staurolite cores and in its fractures, biotite is chloritized and garnet incorporates MnO. (C) Reconstructed P–T paths for samples AR14, see text for details. (D) Simplified petrological model for sample AR14 showing the garnet evolution and its relationships with the metamorphic stages, crystallisation of monazite and ages: (1) Nucleation and crystallisation of garnet along an unknown prograde path and incorporation of inclusions; (2) beginning of decompression path associated with intra-crystalline diffusion in Grt_core and Grt_mantle followed by Grt_rim1 crystallization. Staurolite and monazite may start to crystallize; (3) Temperature increases, leading to the crystallization of sillimanite and Grt_rim2 and to the hypothetical breakdown of staurolite. (4) Garnet incorporates MnO and biotite is chloritized. Monazite recrystallization is assisted by dextral shearing and aqueous fluids throughout the entire decompression path.