Supplementary Material

Supplementary Appendix 1: Comparisons of the geochemical compositions of the Trégor dolerites and of the dolerites with mafic to intermediate volcanic rocks from the Paimpol Formation

Supplementary Figure 1: Cathodoluminescence imaging of the yellow zircon grains extracted from the orthogneiss sample PB-18-3. Letters refer to the grain numbers noted in Supplementary Table 4.

Supplementary Figure 2: Cathodoluminescence imaging of the pink zircon grains extracted from the orthogneiss sample PB-18-3. Numbers refer to the grain numbers noted in Supplementary Table 4.

Supplementary Figure 3:: Cathodoluminescence imaging of the apatite grains extracted from the orthogneiss sample PB-18-3.

Supplementary Figure 4:: Cathodoluminescence imaging of the zircon grains extracted from the granodiorite sample PB-18-2. Numbers refer to the grain numbers noted in Supplementary Table 4.

Supplementary Figure 5:: Cathodoluminescence imaging of some the apatite grains extracted from the doleritic dyke sample PB-18-1.

Supplementary Table 1:: Operating conditions for the apatite LA-ICP-MS dating in this study.

Supplementary Table 2: Operating conditions for the zircon LA-ICP-MS dating in this study

Supplementary Table 3: U-Pb analyses of the primary and secondary reference materials analyzed during this study.

Supplementary Table 4: U-Pb analyses of zircon grains from sample PB-18-3 and PB-18-2 analyzed during this study.

Supplementary Table 5: U-Pb analyses of apatite grains from sample PB-18-3 and PB-18-1 analyzed during this study.

© M. Poujol et al., Published by EDP Sciences 2024