Open Access
Table 3
Results of U-Pb dating on the muscovite leucogranite (GB15-12).
| Grain | 207Pb (cps) |
U (ppm) |
Pb (ppm) |
Th U |
206Pbc (%) |
206Pb 238U |
±2σ (%) |
207Pb 235U |
±2σ (%) |
207Pb 206Pb |
±2σ (%) |
rho | 206Pb 238U |
±2σ (Ma) |
207Pb 235U |
±2σ (Ma) |
207Pb 206Pb |
±2σ (Ma) |
conc. (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GB15-12 | |||||||||||||||||||
| a575 | 280055 | 4078 | 175 | 0.19 | 15.28 | 0.03332 | 2.6 | 0.2774 | 10.1 | 0.06038 | 9.8 | 0.26 | 211 | 5 | 249 | 23 | 617 | 212 | 34 |
| a576 | 909894 | 5435 | 379 | 0.42 | 1.63 | 0.06654 | 1.6 | 0.5509 | 2.8 | 0.06004 | 2.4 | 0.56 | 415 | 6 | 446 | 10 | 605 | 51 | 69 |
| a577 | 593912 | 2619 | 283 | 0.92 | 11.88 | 0.08270 | 2.9 | 0.763 | 7.9 | 0.06691 | 7.4 | 0.37 | 512 | 14 | 576 | 35 | 835 | 153 | 61 |
| a578 | 473293 | 1670 | 180 | 0.19 | 3.88 | 0.09880 | 1.9 | 0.8283 | 5.0 | 0.06081 | 4.7 | 0.37 | 607 | 11 | 613 | 23 | 632 | 100 | 96 |
| a579 | 2165504 | 9343 | 1153 | 1.71 | 4.80 | 0.10230 | 4.2 | 0.8543 | 6.1 | 0.06055 | 4.4 | 0.69 | 628 | 25 | 627 | 29 | 623 | 95 | 101 |
| a580 | 331136 | 2154 | 127 | 1.51 | 9.00 | 0.04131 | 2.2 | 0.3617 | 8.5 | 0.0635 | 8.2 | 0.27 | 261 | 6 | 313 | 23 | 725 | 173 | 36 |
| a581 | 1050074 | 4236 | 508 | 0.95 | 4.14 | 0.10490 | 1.5 | 0.9228 | 4.4 | 0.0638 | 4.2 | 0.34 | 643 | 9 | 664 | 22 | 735 | 88 | 87 |
| a582 | 1091240 | 5727 | 352 | 0.33 | 0.09 | 0.05574 | 3.1 | 0.4479 | 3.2 | 0.05828 | 0.7 | 0.98 | 350 | 11 | 376 | 10 | 540 | 14 | 65 |
| a583 | 1632903 | 4381 | 618 | 1.84 | 3.98 | 0.10030 | 2.5 | 0.8344 | 5.6 | 0.06031 | 5 | 0.44 | 616 | 15 | 616 | 26 | 615 | 109 | 100 |
| a584 | 1783453 | 9460 | 1008 | 0.19 | 15.35 | 0.08274 | 2.6 | 0.7363 | 7.9 | 0.06454 | 7.5 | 0.32 | 512 | 13 | 560 | 35 | 759 | 158 | 67 |
| a585 | 630422 | 3796 | 241 | 0.32 | 5.90 | 0.05573 | 3.0 | 0.4434 | 6.5 | 0.05771 | 5.8 | 0.5 | 350 | 10 | 373 | 21 | 519 | 128 | 67 |
| a586 | 542273 | 3642 | 197 | 1.13 | 7.19 | 0.04261 | 3.8 | 0.3609 | 7.7 | 0.06143 | 6.7 | 0.49 | 269 | 10 | 313 | 21 | 654 | 145 | 41 |
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