Zircon and apatite U-Pb geochronology of the Paleoproterozoic (Eburnean) basement and late Neoproterozoic (Pan-African) metamorphism and magmatism from Port-Béni, Armorican Massif (France)

Special Issue Some applications of LA-ICP-MS U-Pb geochronology: A tribute to Jean Louis Paquette

Open Access

Fig. 7

(A) Tera-Wasserburg diagram for the apatite dating for the orthogneiss sample PB-18-3 yeilding a lower intercept date of 614.5 ± 5.5 Ma; (B) Wetherill concordia diagram for the zircon grains extracted from the granodiorite sample PB-18-2 with a concordia date of 604.5 ± 2.0 Ma; (C) Tera Wasserburg concordia diagraom for the apatite grains extracted from the doleritic dyke sample PB-18-1 yielding a lower intercept date of 597 ± 15 Ma.

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