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Fig. 5 | Swiss Journal of Geosciences

Fig. 5

From: Precambrian to Paleozoic zircon record in the Siviez-Mischabel basement (western Swiss Alps)

Fig. 5

Zircon U–Pb concordia plots for two metasedimentary rock samples from the Siviez-Mischabel nappe. a Analyses of core areas from sample 618, shown in green, give Archean and Proterozoic ages. Three Carboniferous-Permian (yellow) data correspond to spots on zircons lacking a highly luminescent rim. b The age spectrum obtained from sample 644 can be grouped into ages >1 Ga (violet) and <1 Ga (blue). The two oldest and the one youngest dating results are not included in the “staircase” plots. Colored ellipses correspond to more than 90 % concordant data, gray ellipses to less than 90 %. Errors are reported at the 2σ-level

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