(A) ²⁰⁸Pb/²³²Th vs. ²⁰⁶Pb/²³⁸U diagram for monazites in sample AG17-J15a. Dashed ellipses correspond to discordant data. Dark ellipses correspond to concordant ages affected (or not) by mixing between M1 and M2 monazite domains. White ellipses correspond to M2 analyses affected by common Pb contamination and mixing with the M1 domain. Grey ellipses correspond to analyses used for the Discordia calculation. (B) Tera–Wasserburg diagram for the same sample. (C) ²⁰⁸Pb/²³²Th vs. ²⁰⁶Pb/²³⁸U diagram for monazites (sample AG17-J15b) and (D) associated Tera–Wasserburg diagram. (E) ²⁰⁸Pb/²³²Th versus ²⁰⁶Pb/²³⁸U diagram for monazites in sample AG17-J6b. Dashed ellipses correspond to discordant data. Grey ellipses correspond to analyses used for the Discordia calculation. This sample is characterized by two populations of chemically distinct monazites, which allow two Discordia lines to be drawn. See the text for detailed explanations. (F) Tera–Wasserburg diagram for the same sample.