Supplementary materialsText 1: Hydrogen isotope measurements and calculation of ẟDwater valuesText 2: EBSD analytical methodsText 3: Microprobe analytical methodsText 4: Ti-in-Ms geothermometer applicationText 5: Muscovite40Ar/39Ar geochronology analytical methods (Rennes)Text 6: Zircon, Monazite and Apatite U-Pb dating analytical methods (Rennes)Text 7: Monazite LA-ICP-MS U-Pb dating analytical methods (Portsmouth)Figure 1: Cathodoluminescence images of apatite dated by U/Pb (Rennes)Table 1: Microprobe analysis of muscovite and Ti-in-Ms geothermometryTable 2: Ar/Ar dating analytical parametersTable 3: Ar/Ar dating on muscovite results( Excel spreadsheet attached)Table 4: Operating conditions for the LA-ICP-MS equipmentTable 5: U/Pb dating on monazite and zircon from leucogranite results (Rennes) (Excel spreadsheet)Table 6: Operating conditions for the LA-ICP-MS equipment (Apatite - Rennes)Table 7: U/Pb dating on apatite from leucogranite results (Rennes) (Excel spreadsheet attached)Table 8: Operating conditions for the LA-ICP-MS equipment (Monazite - Portsmouth)Table 9: U/Pb dating on monazite from migmatiteresults (Portsmouth) (Excel spreadsheet attached)Supplementary references