Fig. 12

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Diagramme Concordia obtenus pour le zircon du granite de Chanon (A), et diagrammes Concordia Tera-Wasserburg obtenus sur la coupole de Montebras pour l’apatite du microgranite (B), la manganocolumbite « coltan » (C), la cassitérite (D) et l’apatite (E) du leucogranite albitique, deux cassitérites de la pegmatite stockscheider (F et G), et une cassitérite de filon de quartz stannifère (H) ; n correspond au nombre d’analyses utilisées pour calculer la concordia. Les ellipses et les erreurs sont à 2 σ.
Concordia diagram obtained for zircon from Chanon granite (A) and Tera-Wasserburg concordia diagrams obtained on the Montebras cupola for apatite from microgranite (B), manganocolumbite “coltan” (C), cassiterite (D) and apatite (E) from albitic leucogranite, two cassiterite from stockscheider pegmatite (F and G), and a cassiterite from a tin-bearing quartz vein (H); n corresponds to the number of analyses used for calculation per sample. Ellipses and errors are reported at 2 σ.
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