(a) to (c) Representative cathodoluminescence images of (a) magmatic apatite from two mica granite, (b) altered magmatic apatite from greisen and (c) hydrothermal apatite from mineralized vein selvages. (d) to (e) Tera–Wasserburg concordia diagrams, in which apatite analyses were reported to define lower intercept date. (d) Results obtained for magmatic apatite from the unaltered two-mica granite. (e) Results obtained for altered magmatic apatite from greisen. Black ellipses correspond to analyses of altered magmatic apatite and red ellipses correspond to hydrothermal oscillatory zoning overgrowths (f) Results obtained for hydrothermal apatite from the mineralized veins (veins selvages). The black dashed lines represent the unforced discordias used for age determination, the (²⁰⁷Pb/²⁰⁶Pb)₀ values obtained from the upper intersect of discordias are also indicated. Ellipses and errors on ages are reported at 2σ.