测 点 号 | 含量/10-6 | Th/U | 同位素比值 | 年龄/Ma | ||||||||
238U | 232Th | 206Pb | 206Pb | ±% | 207Pb | ±% | 207Pb | ±% | 206Pb | ±1б | ||
238U | 235U | 206Pb | 238U | |||||||||
1 | 183.85 | 144.72 | 4.46 | 0.79 | 0.0232 | 0.0003 | 0.1545 | 0.0045 | 0.0484 | 0.0014 | 148.0 | 1.8 |
2 | 274.32 | 185.70 | 9.43 | 0.68 | 0.0324 | 0.0003 | 0.2297 | 0.0045 | 0.0516 | 0.0010 | 205.8 | 2.0 |
3 | 105.19 | 93.46 | 2.71 | 0.89 | 0.0230 | 0.0003 | 0.1529 | 0.0066 | 0.0485 | 0.0020 | 146.5 | 1.8 |
4 | 473.17 | 188.37 | 16.29 | 0.40 | 0.0326 | 0.0003 | 0.2294 | 0.0037 | 0.0512 | 0.0008 | 206.6 | 1.9 |
5 | 962.14 | 870.34 | 24.22 | 0.90 | 0.0231 | 0.0002 | 0.1552 | 0.0021 | 0.0488 | 0.0006 | 147.4 | 1.2 |
6 | 255.08 | 132.57 | 8.54 | 0.52 | 0.0324 | 0.0004 | 0.2297 | 0.0060 | 0.0516 | 0.0014 | 205.7 | 2.4 |
7 | 159.38 | 115.06 | 3.82 | 0.72 | 0.0231 | 0.0003 | 0.1630 | 0.0055 | 0.0515 | 0.0017 | 147.4 | 1.7 |
8 | 321.72 | 192.21 | 9.26 | 0.60 | 0.0293 | 0.0006 | 0.1967 | 0.0061 | 0.0497 | 0.0017 | 185.9 | 3.7 |
9 | 924.18 | 313.38 | 33.43 | 0.34 | 0.0324 | 0.0005 | 0.2180 | 0.0048 | 0.0487 | 0.0008 | 205.5 | 3.1 |
10 | 499.28 | 255.59 | 26.20 | 0.51 | 0.0467 | 0.0004 | 0.3691 | 0.0051 | 0.0573 | 0.0008 | 294.4 | 2.6 |
11 | 298.39 | 234.64 | 7.02 | 0.79 | 0.0244 | 0.0004 | 0.1757 | 0.0063 | 0.0526 | 0.0019 | 155.1 | 2.6 |
12 | 1151.65 | 165.18 | 38.65 | 0.14 | 0.0325 | 0.0003 | 0.2324 | 0.0038 | 0.0520 | 0.0008 | 206.2 | 2.1 |
13 | 373.08 | 259.95 | 9.21 | 0.70 | 0.0229 | 0.0003 | 0.1569 | 0.0046 | 0.0499 | 0.0014 | 146.0 | 2.1 |
14 | 502.74 | 219.32 | 11.54 | 0.44 | 0.0232 | 0.0003 | 0.1618 | 0.0044 | 0.0508 | 0.0014 | 147.8 | 1.9 |
15 | 1346.34 | 84.04 | 88.84 | 0.06 | 0.0634 | 0.0007 | 0.4823 | 0.0050 | 0.0553 | 0.0005 | 396.0 | 4.0 |
16 | 508.47 | 301.93 | 18.81 | 0.59 | 0.0325 | 0.0003 | 0.2187 | 0.0039 | 0.0487 | 0.0009 | 206.4 | 1.9 |
17 | 1747.26 | 2657.20 | 44.36 | 1.52 | 0.0231 | 0.0002 | 0.1593 | 0.0021 | 0.0500 | 0.0007 | 147.4 | 1.4 |
18 | 343.93 | 249.77 | 8.38 | 0.73 | 0.0231 | 0.0003 | 0.1567 | 0.0032 | 0.0493 | 0.0010 | 147.4 | 1.7 |
19 | 150.77 | 116.16 | 3.90 | 0.77 | 0.0231 | 0.0003 | 0.1599 | 0.0060 | 0.0506 | 0.0020 | 147.5 | 2.1 |
20 | 316.79 | 253.58 | 8.05 | 0.80 | 0.0231 | 0.0003 | 0.1629 | 0.0045 | 0.0516 | 0.0017 | 147.0 | 1.9 |
21 | 153.09 | 136.03 | 3.62 | 0.89 | 0.0229 | 0.0005 | 0.1574 | 0.0073 | 0.0501 | 0.0023 | 146.0 | 2.9 |
22 | 408.92 | 448.37 | 10.60 | 1.10 | 0.0230 | 0.0003 | 0.1557 | 0.0041 | 0.0494 | 0.0015 | 146.6 | 2.0 |
23 | 315.95 | 259.52 | 7.63 | 0.82 | 0.0230 | 0.0003 | 0.1554 | 0.0035 | 0.0493 | 0.0011 | 146.4 | 1.8 |
24 | 406.63 | 333.45 | 9.58 | 0.82 | 0.0230 | 0.0003 | 0.1551 | 0.0040 | 0.0489 | 0.0012 | 146.4 | 2.1 |
25 | 716.51 | 141.65 | 26.33 | 0.20 | 0.0325 | 0.0004 | 0.2356 | 0.0061 | 0.0523 | 0.0013 | 206.2 | 2.7 |
26 | 530.89 | 94.74 | 18.83 | 0.18 | 0.0326 | 0.0003 | 0.2261 | 0.0034 | 0.0504 | 0.0007 | 206.6 | 2.0 |
27 | 1292.15 | 636.07 | 32.55 | 0.49 | 0.0230 | 0.0002 | 0.1572 | 0.0026 | 0.0496 | 0.0007 | 146.4 | 1.6 |
28 | 131.59 | 134.01 | 3.08 | 1.02 | 0.0231 | 0.0004 | 0.1575 | 0.0076 | 0.0501 | 0.0024 | 147.2 | 2.7 |
29 | 409.17 | 274.42 | 10.25 | 0.67 | 0.0231 | 0.0003 | 0.1575 | 0.0033 | 0.0495 | 0.0009 | 147.3 | 1.7 |
30 | 231.99 | 192.85 | 5.58 | 0.83 | 0.0231 | 0.0003 | 0.1538 | 0.0044 | 0.0485 | 0.0013 | 147.1 | 2.0 |