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Table 2 U, Th and Pb SIMS zircon data of the eclogite AV16-21 from Ivozio Complex, the eclogite AV16-47 and the blueschist AV16-44 from Malone Valley

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 (204Pb corr.) 206Pb/238U Age (Ma)  ± 1σ Comments
207Pb/235U  ± 1σ% 206Pb/238U  ± 1σ% ρ
Ivozio Complex–AV16-21 eclogite
 @12 2797 190 0.07 0.13 0.3787 1.95 0.05159 1.87 0.9616 324.3 5.9 Core
 @15 1224 59 0.05 0.02 0.3859 1.98 0.05267 1.91 0.9619 330.9 6.2 Core
 @7 4281 793 0.19 0.10 0.3973 1.98 0.05352 1.87 0.9449 336.1 6.1 Core
 @14 3151 228 0.07 0.01 0.3958 1.90 0.05383 1.88 0.9888 338.0 6.2 Core
 @6 495 15 0.03 0.78 0.4035 5.99 0.05449 1.87 0.3128 342.0 6.2 Core
 @5 871 94 0.11 0.39 0.3957 3.41 0.05453 1.87 0.5499 342.3 6.2 Core
 @16 3467 257 0.07 0.01 0.4004 1.91 0.05470 1.89 0.9898 343.3 6.3 Core
 @8 2198 146 0.07 0.17 0.4017 2.29 0.05523 1.90 0.8279 346.6 6.4 Core
 @13 2000 123 0.06 0.02 0.4139 1.89 0.05635 1.87 0.9921 353.4 6.4 Core
 @1 2910 208 0.07 0.02 0.4203 1.89 0.05660 1.87 0.9888 354.9 6.5 Core
 @10 4297 334 0.08 0.02 0.4389 1.89 0.05964 1.88 0.9964 373.4 6.8 Possible inheritance
 @11 1096 87 0.08 0.02 0.4570 2.16 0.06246 2.04 0.9473 390.5 7.7 Possible inheritance
 @2 95 43 0.45 0.23 0.5007 2.74 0.06593 1.89 0.6887 411.6 7.5 Possible inheritance
Malone Valley–AV16-44 blueschist
 @6 357 24 0.07 0.10 0.3286 2.28 0.04475 2.02 0.8849 282.2 5.6 Rim
 @1 41 1 0.03 1.23 0.3143 5.73 0.04650 1.88 0.3284 293.0 5.4 Rim
 @7 311 20 0.06 0.16 0.3376 2.11 0.04703 1.90 0.9042 296.3 5.5 Rim
 @5 496 64 0.13 0.07 0.3399 2.01 0.04718 1.88 0.9389 297.2 5.5 Rim
 @3 77 30 0.39 0.13 0.8102 2.19 0.09825 1.91 0.8714 604.1 11.0 Core
 @2 49 27 0.56 0.52 0.9077 2.97 0.10530 1.88 0.6322 645.4 11.6 Core
Malone Valley–AV16-47 eclogite
 @11 9 2 0.21 4.49 0.2492 27.62 0.03858 2.53 0.0916 244.0 6.1 Possible Pb loss
 @16 8 3 0.35 3.29 0.2370 38.35 0.04164 1.95 0.0507 263.0 5.0  
 @8 6 1 0.21 3.07 0.2882 25.48 0.04221 2.09 0.0819 266.5 5.4  
 @13 9 3 0.36 2.55 0.2792 23.51 0.04331 2.00 0.0850 273.3 5.4  
 @15 6 3 0.45 3.32 0.3055 19.83 0.04344 1.98 0.0998 274.1 5.3  
 @14 7 2 0.32 2.35 0.2919 18.63 0.04351 2.13 0.1141 274.5 5.7  
 @18 16 3 0.20 2.41 0.2493 20.12 0.04465 2.02 0.1002 281.6 5.6  
 @7 16 5 0.28 1.52 0.3323 13.06 0.04484 1.94 0.1483 282.8 5.4  
 @2 15 2 0.16 0.62 0.3214 8.33 0.04489 1.93 0.2322 283.1 5.4  
 @6 11 5 0.41 1.63 0.3190 12.89 0.04497 1.91 0.1481 283.6 5.3  
 @4 16 6 0.36 1.71 0.3125 18.19 0.04510 1.95 0.1072 284.4 5.4  
 @17 323 34 0.11 0.08 0.3241 2.04 0.04540 1.88 0.9252 286.2 5.3  
 @3 10 1 0.15 2.04 0.3043 20.62 0.04547 1.93 0.0936 286.7 5.4  
 @19 6 1 0.20 3.26 0.3110 31.62 0.04550 1.88 0.0594 286.9 5.3  
 @12 9 4 0.42 1.57 0.3485 14.47 0.04553 1.89 0.1304 287.0 5.3  
 @20 14 6 0.44 2.12 0.3099 16.01 0.04574 1.89 0.1181 288.3 5.3  
 @10 8 2 0.27 3.35 0.3028 22.59 0.04577 1.92 0.0848 288.5 5.4  
 @1 7 3 0.38 2.74 0.2845 27.23 0.04581 1.91 0.0701 288.8 5.4  
 @9 7 2 0.30 1.69 0.3783 16.51 0.04608 1.93 0.1167 290.4 5.5  
 @5 10 2 0.18 2.49 0.3107 24.39 0.04657 2.13 0.0871 293.4 6.1  
Ivozio Complex–AV16-21 eclogite
 @12 2797 190 0.07 0.13 0.3787 1.95 0.05159 1.87 0.9616 324.3 5.9 Core
 @15 1224 59 0.05 0.02 0.3859 1.98 0.05267 1.91 0.9619 330.9 6.2 Core
 @7 4281 793 0.19 0.10 0.3973 1.98 0.05352 1.87 0.9449 336.1 6.1 Core
 @14 3151 228 0.07 0.01 0.3958 1.90 0.05383 1.88 0.9888 338.0 6.2 Core
 @6 495 15 0.03 0.78 0.4035 5.99 0.05449 1.87 0.3128 342.0 6.2 Core
 @5 871 94 0.11 0.39 0.3957 3.41 0.05453 1.87 0.5499 342.3 6.2 Core
 @16 3467 257 0.07 0.01 0.4004 1.91 0.05470 1.89 0.9898 343.3 6.3 Core
 @8 2198 146 0.07 0.17 0.4017 2.29 0.05523 1.90 0.8279 346.6 6.4 Core
 @13 2000 123 0.06 0.02 0.4139 1.89 0.05635 1.87 0.9921 353.4 6.4 Core
 @1 2910 208 0.07 0.02 0.4203 1.89 0.05660 1.87 0.9888 354.9 6.5 Core
 @10 4297 334 0.08 0.02 0.4389 1.89 0.05964 1.88 0.9964 373.4 6.8 Possible inheritance
 @11 1096 87 0.08 0.02 0.4570 2.16 0.06246 2.04 0.9473 390.5 7.7 Possible inheritance
 @2 95 43 0.45 0.23 0.5007 2.74 0.06593 1.89 0.6887 411.6 7.5 Possible inheritance
  1. Data were processed using the CAMECA-CIPS software. The dates that were not used for the age calculations shown in Figs. 3, 4 and 7 are reported in italics
  2. a\(\mathrm{f}206= \frac{{}^{206}{\mathrm{Pb}}_{\mathrm{common}}}{{}^{206}{\mathrm{Pb}}_{\mathrm{total}}}*100\)