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Swiss Journal of Geosciences
Fig. 4 | Swiss Journal of Geosciences

Fig. 4

From: Thermal evolution of a Variscan syn-orogenic intracontinental basin (Servoz basin, Western Alps): RSCM geothermometry and geochronology

Fig. 4

U–Pb LA-ICPMS results on the microconglomerate AR476. A Cathodoluminescence photos of zircons with locations of laser spots and associated single-grain concordia ages. B Zircon U–Pb Tera Wasserburg diagram. C Single-grain concordia ages histogram and probability distribution histogram were generated using a bin-width = 40 and a band-width = 10. Discordant ellipses (white ellipses) and concordant ellipses (grey ellipses) older than 650 Ma are not plotted in these diagrams. D Zoom-in of B on the youngest analyses. Only dark grey ellipses are used to calculate the concordia age. Error ellipses and uncertainties in ages are ± 2σ. € Zircon Th/U ratio vs. single-grain concordia age diagram. Th/U = 0.10 is the upper limit for metamorphic zircon after (1) and (2); 0.30 is the lower limit for the magmatic zircon after (2) and Th/U = 1 is the upper limit for the felsic zircon sources field after (3). (1): Rubatto, 2017; (2): Teipel et al. (2004) (3): Linnemann et al. (2011)

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