Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Ion microprobe zircon data of analyzed peperite_
| Sample | U(ppm) | Th (ppm) | Th/U | 204Pb/206Pb | (%) error | 206Pbc (%) | 238U/206Pb* | ±% | 207Pb*/206Pb* | ±% | 207Pb*/235U | ±% | 206Pb*/238U | ±% | error corr. | 206pb/238U age (Ma) | ±(Ma) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SFP22-90.7.1 | 253 | 306 | 1.21 | 1.1E-3 | 58 | 2.06 | 83 | 1.7 | 0.031 | 33 | 0.051 | 33 | 0.012 | 1.7 | 0.05 | 77.3 | ±1 |
| SFP22-90.11.1 | 491 | 785 | 1.60 | 1.8E-4 | 100 | 0.33 | 82 | 1.2 | 0.045 | 7 | 0.075 | 7 | 0.012 | 1.2 | 0.17 | 78.3 | 1.0 |
| SFP22-90.6.1 | 316 | 345 | 1.09 | 7.5E-4 | 58 | 1.39 | 81 | 1.0 | 0.040 | 17 | 0.069 | 17 | 0.012 | 1.0 | 0.06 | 79.0 | 0.8 |
| SFP22-90.12.1 | 626 | 1171 | 1.87 | 1.2E-4 | 100 | 0.23 | 79 | 0.9 | 0.046 | 5 | 0.080 | 5 | 0.013 | 0.9 | 0.17 | 81.4 | 0.7 |
| SFP22-90.1.1 | 454 | 1113 | 2.45 | -7.8E-4 | 50 | 0.00 | 78 | 0.9 | 0.061 | 10 | 0.108 | 10 | 0.013 | 0.9 | 0.10 | 81.9 | 0.8 |
| SFP22-90.3.2 rejected | 444 | 1269 | 2.85 | -2.0E-3 | 32 | 0.00 | 77 | 1.8 | 0.074 | 12 | 0.133 | 12 | 0.013 | 1.8 | 0.15 | 82.9 | ±2 |
| SFP22-90.3.1 | 6 | 3 | 0.51 | 1.6E-2 | 100 | 30.64 | 108 | 45.8 | 0.126 | 64 | 0.160 | 79 | 0.009 | 45.8 | 0.58 | 59.1 | ±27 |
| SFP22-90.5.1 | 11 | 8 | 0.66 | -8.7E-3 | 100 | 0.00 | 65 | 16.1 | 0.189 | 49 | 0.399 | 51 | 0.015 | 16.1 | 0.31 | 98.2 | ±16 |
| SFP22-90.2.1 | 375 | 134 | 0.36 | ---- | --- | 0.00 | 21 | 0.7 | 0.052 | 1 | 0.334 | 2 | 0.047 | 0.7 | 0.44 | 294 | ±2 |
| SFP22-90.9.1 | 319 | 102 | 0.32 | 3.7E-4 | 26 | 0.67 | 14 | 0.6 | 0.059 | 4 | 0.564 | 4 | 0.070 | 0.6 | 0.14 | 435 | ±3 |
| SFP22-90.4.1 | 517 | 28 | 0.06 | 7.4E-5 | 41 | 0.13 | 14 | 0.6 | 0.054 | 1 | 0.530 | 1 | 0.071 | 0.6 | 0.45 | 443 | ±3 |
| SFP22-90.8.1 | 253 | 19 | 0.07 | 1.4E-4 | 41 | 0.26 | 14 | 0.7 | 0.054 | 2 | 0.546 | 2 | 0.073 | 0.7 | 0.34 | 453 | ±3 |