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Table 7 U, Th and Pb SIMS zircon data of the micaschist AV17-07 from Monte Mucrone that yield the age of the Alpine HP metamorphic event

From: The evolution of the Sesia Zone (Western Alps) from Carboniferous to Cretaceous: insights from zircon and allanite geochronology

Spot name U (µg/g) Th (µg/g) Th/U f206a Concordia diagram (208Pb corr.) 206Pb/238U
Age (Ma)
 ± 1σ Comments
207Pb/235U  ± 1σ% 206Pb/238U  ± 1σ% ρ
Monte Mucrone–AV17-07 micaschist
 @13 207 1 0.01 2.58 0.06260 8.13 0.01023 2.12 0.2629 65.6 1.4 Rim2
 @18 199 1 0.01 2.25 0.06597 4.35 0.01024 2.22 0.4904 65.7 1.5 Rim2
 @1 241 2 0.01 1.72 0.06392 4.32 0.01032 2.02 0.4221 66.2 1.3 Rim2
 @25 198 1 0.01 2.05 0.07004 4.43 0.01046 2.11 0.4485 67.1 1.4 Rim2
 @34 339 2 0.01 0.69 0.07086 3.19 0.01056 1.70 0.5095 67.7 1.1 Rim2
 @14 178 1 0.01 2.32 0.07012 4.65 0.01098 2.19 0.4475 70.4 1.5 Rim2
 @23 287 1 0.01 0.36 0.07005 4.27 0.01124 2.89 0.6531 72.0 2.1 Rim2
  1. Data were processed using SQUID 2.50
  2. a% of common 206Pb on total 206Pb