Stratigraphic sequence and characteristics of the source area of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian:Constraints from detrital zircon LA-ICP-MS U-Pb dating
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摘要:
闽西南地区下古生界魏坊组与东坑口组地层层序长期以来一直存在争议。应用LA-ICP-MS U-Pb测年，对闽西南地区下古生界魏坊组与东坑口组进行了120颗碎屑锆石的U-Pb测年，获得锆石年龄范围为506~3431Ma，主要分布于511~2796Ma之间，主要峰值年龄为964Ma，次要峰值年龄为514Ma，并存在813Ma、1231Ma、2483Ma的次级峰。年龄谱特征显示，魏坊组沉积早于东坑口组，东坑口组时代不属于中上寒武世。下古生界物源以964Ma峰值为代表，反映Grenville构造热事件的物源最显著。还获得了较丰富的峰值年龄为514Ma的泛非期构造热事件年龄，以及古太古代锆石年龄记录，为闽西南地区下古生界地层层序的确立和物源研究提供了重要新资料。
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关键词:
- 地层层序 /
- 魏坊组 /
- 东坑口组 /
- 碎屑锆石 /
- LA-ICP-MS U-Pb测年
Abstract:The stratigraphic sequence of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian has long been a problem of controversy. In this paper, the authors studied geochronology of 120 detrital zircon samples from the Lower Paleozoic Weifang Formation and Dongkengkou Formation sedimentary rocks in southwestern Fujian by LA-ICP-MS U-Pb dating, and obtained zircon ages ranging from 506Ma to 3431Ma, with most of the data from 511Ma to 2796Ma, the main peak value 964Ma, a secondary peak value 514Ma, and secondary peak values 813Ma, 1231Ma, 2483Ma. Characteristics of the age spectrum suggest that Weifang Formation was deposited earlier than Dongkengkou Formation. Age of Dongkengkou Formation does not belong to MiddleUpper Cambrian. Lower Paleozoic source with peak value at 964Ma most significantly reflects the Grenville tectonic event. The authors also received peak value age of 514Ma of Pan-African tectonic event. In addition, the authors found Paleoarchean zircon ages record. Important new information is thus provided for the establishment of Lower Paleozoic stratigraphic sequence; source studies.
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表 2 魏坊组碎屑锆石(S401)U-Th-Pb测年结果
Table 2. U-Th-Pb dating results of detrital zircons from Weifang Formation (S401)
样品号与测点 232Th/10-6 238U/10-6 Th/U Pb*/10-6 207Pb/206pb 206Pb/238U 207Pb/235U 207Pb/206Pb 206Pb/238U 207Pb/235U 谐和度 比值 1σ 比值 1σ 比值 1σ 年龄/Ma 1σ 年龄/ Ma 1σ 年龄/ Ma 1σ 401-01 811.2 1358.6 0.60 25.0 0.0854 0.0018 0.2070 0.0019 2.4401 0.0296 1324.9 41.3 1212.8 10.2 1254.5 8.7 103 401-02 544.4 1401.3 0.39 24.8 0.0923 0.0019 0.2573 0.0023 3.2772 0.0315 1473.7 38.1 1475.8 11.6 1475.7 7.5 100 401-03 393.7 973.3 0.40 37.5 0.0739 0.0063 0.1749 0.0048 1.7837 0.1475 1039.1 162.6 1038.9 26.3 1039.5 53.8 100 401-04 361.1 748.5 0.48 28.6 0.2798 0.0056 0.6627 0.0059 25.5875 0.2310 3361.9 30.8 3277.6 22.8 3330.9 8.8 102 401-05 117.5 137.9 0.85 25.1 0.0661 0.0022 0.1296 0.0015 1.1820 0.0324 809.6 67.5 785.5 8.8 792.2 15.1 101 401-06 104.7 236.3 0.44 29.0 0.1819 0.0038 0.4996 0.0048 12.5372 0.1373 2669.8 34.0 2612.3 20.8 2645.5 10.3 101 401-07 573.7 424.3 1.35 24.6 0.0965 0.0022 0.2729 0.0027 3.6354 0.0487 1558.2 41.3 1555.6 13.4 1557.3 10.7 100 401-08 57.6 58.5 0.98 27.1 0.0638 0.0040 0.1204 0.0024 1.0599 0.0629 735.0 127.5 732.9 13.8 733.8 31.0 100 401-09 125.5 394.7 0.32 28.6 0.1282 0.0029 0.3475 0.0035 6.1474 0.0824 2073.8 38.6 1922.4 16.9 1997.0 11.7 104 401-10 187.8 101.4 1.85 24.3 0.0593 0.0025 0.0826 0.0011 0.6761 0.0254 579.4 89.0 511.5 6.5 524.4 15.4 103 401-11 213.1 1082.3 0.20 47.3 0.1392 0.0049 0.3986 0.0076 7.6565 0.2420 2217.4 59.6 2162.7 35.2 2191.5 28.4 101 401-12 127.9 1153.8 0.11 24.6 0.0655 0.0014 0.1332 0.0012 1.2044 0.0142 791.4 44.5 806.2 6.8 802.6 6.5 100 401-13 106.5 145.0 0.73 35.2 0.0858 0.0071 0.0999 0.0028 1.1814 0.0930 1332.7 151.5 613.5 16.5 791.9 43.3 129 401-14 286.2 462.1 0.62 24.4 0.0704 0.0016 0.1565 0.0015 1.5200 0.0219 940.7 46.8 937.0 8.2 938.5 8.8 100 401-15 97.1 169.1 0.57 29.9 0.1686 0.0037 0.4668 0.0050 10.8578 0.1447 2544.0 36.6 2469.3 21.9 2511.0 12.4 102 401-16 159.8 424.0 0.38 24.8 0.0614 0.0017 0.0986 0.0010 0.8345 0.0174 652.2 58.5 606.0 5.9 616.1 9.6 102 401-17 40.3 125.4 0.32 31.0 0.1718 0.0037 0.4746 0.0049 11.2443 0.1404 2574.7 35.8 2503.7 21.4 2543.6 11.7 102 401-18 265.4 508.4 0.52 26.1 0.0962 0.0022 0.2540 0.0025 3.3721 0.0463 1552.5 42.0 1459.1 12.7 1497.9 10.7 103 401-19 100.9 634.0 0.16 25.4 0.0703 0.0016 0.1556 0.0014 1.5079 0.0199 935.7 45.4 932.3 8.0 933.6 8.1 100 401-20 559.3 954.1 0.59 24.7 0.0735 0.0017 0.1676 0.0016 1.6999 0.0229 1028.3 45.1 999.0 8.6 1008.5 8.6 101 401-21 168.1 99.1 1.70 25.4 0.0700 0.0029 0.1533 0.0022 1.4797 0.0539 928.2 81.9 919.2 12.4 922.1 22.1 100 401-22 87.8 75.1 1.19 27.0 0.0965 0.0027 0.2654 0.0032 3.5329 0.0768 1557.5 52.0 1517.5 16.4 1534.6 17.2 101 401-23 499.0 399.9 1.25 26.9 0.1603 0.0033 0.4482 0.0041 9.9093 0.1008 2458.7 34.6 2387.2 18.3 2426.4 9.4 102 401-24 85.1 139.2 0.61 30.9 0.1964 0.0044 0.5363 0.0060 14.5301 0.1987 2796.7 36.0 2767.9 25.1 2785.0 13.0 101 401-25 130.1 181.3 0.72 34.6 0.2927 0.0075 0.6352 0.0109 25.6408 0.5335 3431.9 39.3 3170.0 42.9 3332.9 20.3 105 401-26 236.8 269.4 0.88 23.7 0.0576 0.0018 0.0831 0.0009 0.6597 0.0165 512.8 67.6 514.6 5.3 514.4 10.1 100 401-27 155.0 84.9 1.83 25.2 0.0578 0.0047 0.0834 0.0018 0.6651 0.0522 523.6 170.2 516.2 10.9 517.7 31.9 100 401-28 89.7 166.0 0.54 26.2 0.0752 0.0021 0.1773 0.0020 1.8377 0.0398 1072.7 56.1 1052.1 10.8 1059.0 14.3 101 401-29 344.6 793.5 0.43 24.5 0.0673 0.0015 0.1290 0.0012 1.1964 0.0157 845.8 46.2 782.1 6.7 798.9 7.3 102 401-30 262.8 438.5 0.60 24.4 0.0713 0.0017 0.1621 0.0015 1.5934 0.0233 965.1 47.2 968.5 8.5 967.6 9.1 100 401-31 185.9 315.4 0.59 25.2 0.0686 0.0019 0.1473 0.0016 1.3927 0.0291 886.1 56.7 885.5 8.8 885.8 12.4 100 401-32 52.7 91.9 0.57 30.6 0.1754 0.0040 0.5007 0.0056 12.1115 0.1722 2609.9 37.4 2616.7 24.0 2613.1 13.3 100 401-33 316.4 102.9 3.07 29.7 0.1482 0.0049 0.4175 0.0075 8.5348 0.2433 2325.6 55.0 2249.2 33.9 2289.6 25.9 102 401-34 508.0 1120.5 0.45 32.4 0.1616 0.0040 0.4379 0.0052 9.7563 0.1598 2472.2 40.2 2341.0 23.5 2412.0 15.1 103 401-35 525.6 1112.5 0.47 26.2 0.1657 0.0035 0.4539 0.0043 10.3714 0.1115 2514.7 35.2 2412.3 18.9 2468.5 10.0 102 401-36 161.7 109.5 1.48 28.5 0.1655 0.0040 0.4759 0.0055 10.8622 0.1683 2512.8 39.1 2509.3 24.2 2511.4 14.4 100 401-37 346.8 592.0 0.59 24.6 0.0727 0.0017 0.1650 0.0015 1.6544 0.0225 1005.8 45.9 984.6 8.5 991.2 8.6 101 401-38 362.6 507.7 0.71 24.3 0.0721 0.0017 0.1684 0.0016 1.6730 0.0235 987.6 46.5 1003.1 8.7 998.3 8.9 100 401-39 34.1 77.0 0.44 27.0 0.0661 0.0026 0.1344 0.0018 1.2250 0.0425 809.7 80.8 812.8 10.2 812.0 19.4 100 401-40 215.1 193.6 1.11 27.0 0.0881 0.0026 0.2221 0.0027 2.6973 0.0608 1383.7 54.9 1293.1 14.0 1327.7 16.7 103 401-41 80.8 89.2 0.91 31.7 0.1748 0.0045 0.4879 0.0066 11.7608 0.2215 2604.3 42.0 2561.5 28.7 2585.5 17.6 101 401-42 43.1 138.1 0.31 31.9 0.1591 0.0036 0.4571 0.0049 10.0269 0.1401 2446.0 38.2 2426.6 21.8 2437.3 12.9 100 401-43 142.4 257.3 0.55 29.4 0.0878 0.0030 0.2223 0.0031 2.6923 0.0776 1379.1 64.3 1293.9 16.3 1326.3 21.4 103 401-44 170.3 641.9 0.27 25.6 0.07400 0.0017 0.1652 0.0016 1.6843 0.0236 1040.4 46.3 985.4 8.6 1002.6 8.9 102 401-45 87.2 201.4 0.43 29.8 0.1891 0.0041 0.5261 0.0052 13.7192 0.1574 2734.5 35.1 2725.0 21.8 2730.5 10.9 100 401-46 671.8 681.7 0.99 23.5 0.0573 0.0017 0.0830 0.0009 0.6558 0.0153 503.8 65.3 513.8 5.2 512.0 9.4 100 401-47 159.2 157.4 1.01 26.2 0.0645 0.0032 0.1261 0.0020 1.1221 0.0513 759.3 101.7 765.5 11.7 764.0 24.5 100 401-48 60.1 49.8 1.21 30.6 0.1600 0.0042 0.4543 0.0061 10.023 0.1935 2455.8 43.5 2414.3 27.0 2436.9 17.8 101 401-49 96.2 172.8 0.56 29.2 0.1026 0.0029 0.2954 0.0036 4.1773 0.0876 1671.2 50.6 1668.3 17.9 1669.6 17.2 100 401-50 106.6 132.8 0.80 26.6 0.0894 0.0024 0.2436 0.0027 3.0032 0.0571 1413.2 50.0 1405.3 13.8 1408.4 14.5 100 401-51 233.1 235.0 0.99 29.2 0.0885 0.0036 0.2268 0.0038 2.7667 0.1018 1392.7 76.9 1317.8 19.9 1346.6 27.4 102 401-52 326.7 190.7 1.71 25.6 0.0598 0.0040 0.0832 0.0016 0.6863 0.0432 597.1 138.1 515.2 9.5 530.6 26.0 103 401-53 138.1 234.4 0.59 25.8 0.0725 0.0020 0.1628 0.0017 1.6277 0.0337 1000.5 55.5 972.3 9.6 981.0 13.0 101 401-54 158.4 317.4 0.50 27.2 0.1153 0.0026 0.3366 0.0032 5.3517 0.0671 1885.0 39.9 1870.1 15.6 1877.2 10.7 100 401-55 352.0 1165.1 0.30 24.1 0.0622 0.0014 0.1010 0.0009 0.8658 0.0117 679.6 48.8 620.4 5.4 633.3 6.4 102 401-56 185.8 262.2 0.71 26.8 0.1075 0.0025 0.3045 0.0030 4.5132 0.0598 1757.5 41.2 1713.5 14.6 1733.4 11.0 101 401-57 194.4 406.6 0.48 25.8 0.0741 0.0019 0.1705 0.0017 1.7413 0.0312 1043.2 51.6 1015.0 9.5 1024.0 11.6 101 401-58 123.0 345.8 0.36 26.3 0.0719 0.0020 0.1526 0.0016 1.5120 0.0230 982.1 54.8 915.5 8.9 935.3 12.1 102 401-59 368.9 579.1 0.64 24.2 0.0622 0.0020 0.1120 0.0012 0.9594 0.0242 679.5 66.1 684.1 6.8 683.0 12.5 100 401-60 539.5 586.7 0.92 25.6 0.0758 0.0022 0.1696 0.0019 1.7720 0.0393 1089.0 57.4 1010.0 10.4 1035.2 14.4 102 注：Pb*为放射性成因铅(Pb*=0.241*206Pb+0.221*207Pb+0.524*208Pb)，谐和度=100×年龄(207Pb/235U)/年龄(206Pb/238U) 
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表 3 东坑口组碎屑锆石(S402)U-Th-Pb测年结果
Table 3. U-Th-Pb dating results of detrital zircons from Dongkengkou Formation (S402)
样品号与测点 232Th/10-6 238U/10-6 Th/U Pb*/10-6 207Pb/206Pb 206Pb/238U 207Pb/235U 207Pb/206Pb 206Pb/238U 207Pb/235U 谐和度 比值 1σ 比值 1σ 比值 1σ 年龄/Ma 1σ 年龄/Ma 1σ 年龄/Ma 1σ 402-01 219.4 399.7 0.55 27.0 0.1577 0.0032 0.4495 0.0039 9.7728 0.0864 2430.8 33.8 2392.8 17.3 2413.6 8.1 101 402-02 143.2 835.6 0.17 25.8 0.0789 0.0016 0.1705 0.0015 1.8559 0.0173 1170.7 39.9 1014.7 8.1 1065.5 6.2 105 402-03 133.2 660.1 0.20 24.7 0.0706 0.0015 0.1535 0.0014 1.4937 0.0157 944.9 42.5 920.5 7.5 927.8 6.4 101 402-04 109.5 135.2 0.81 25.7 0.1034 0.0022 0.2890 0.0026 4.1200 0.0424 1685.4 38.0 1636.7 12.9 1658.3 8.4 101 402-05 609.9 480.6 1.27 25.1 0.0988 0.0020 0.2723 0.0024 3.7106 0.0346 1602.1 37.6 1552.4 12.0 1573.7 7.5 101 402-06 196.4 527.6 0.37 26.7 0.1517 0.0031 0.3921 0.0034 8.2014 0.0756 2365.1 34.3 2132.4 15.9 2253.5 8.3 106 402-07 97.9 235.4 0.42 26.6 0.1074 0.0022 0.2870 0.0026 4.2490 0.0440 1755.5 37.7 1626.2 12.9 1683.5 8.5 104 402-08 53.7 111.0 0.48 27.3 0.0757 0.0021 0.1521 0.0017 1.5880 0.0336 1087.0 55.1 912.9 9.2 965.5 13.2 106 402-09 61.4 170.0 0.36 24.8 0.0714 0.0016 0.1574 0.0014 1.5487 0.0196 967.4 44.6 942.3 8.0 950.0 7.8 101 402-10 462. 5 556.0 0.83 23.1 0.0574 0.0013 0.0818 0.0007 0.6474 0.0077 506.7 47.6 506.7 4.3 506.9 4.8 100 402-11 373.1 771.4 0.48 24.5 0.0737 0.0016 0.1682 0.0015 1.7081 0.0194 1031.9 42.7 1002.1 8.3 1011.6 7.3 101 402-12 529.6 608.9 0.87 24.1 0.0764 0.0016 0.1871 0.0016 1.9719 0.0200 1106.7 41.1 1105.5 8.9 1106.0 6.8 100 402-13 457.5 600.0 0.76 24.3 0.0664 0.0017 0.1234 0.0012 1.1304 0.0210 819.2 53.6 750.4 7.1 767.9 10.0 102 402-14 271.8 358.5 0.76 26.1 0.1171 0.0024 0.3280 0.0029 5.2971 0.0508 1912.6 36.4 1828.8 14.1 1868.4 8.2 102 402-15 112.5 1659.6 0.07 27.3 0.0762 0.0017 0.1605 0.0015 1.6852 0.0198 1099.4 42.8 959.3 8.1 1003.0 7.5 105 402-16 141.8 219.5 0.65 24.3 0.0713 0.0016 0.1609 0.0015 1.5829 0.0193 967.1 44.1 961.8 8.1 963.5 7.6 100 402-17 121.9 272.4 0.45 24.6 0.0773 0.0016 0.1932 0.0017 2.0587 0.0226 1128.3 41.8 1138.7 9.3 1135.2 7.5 100 402-18 94.4 452.7 0.21 27.5 0.0773 0.0019 0.1614 0.0016 1.7207 0.0280 1129.8 48.0 964.3 8.9 1016.3 10.4 105 402-19 218.8 534.3 0.41 31.1 0.0817 0.0030 0.1690 0.0024 1.9043 0.0605 1239.4 70.4 1006.3 13.2 1082.6 21.1 108 402-20 88.4 477.0 0.19 24.7 0.0706 0.0015 0.1517 0.0014 1.4762 0.0159 944.6 42.9 910.7 7.5 920.7 6.5 101 402-21 97.6 694.7 0.14 25.4 0.0821 0.0017 0.2124 0.0019 2.4024 0.0229 1246.6 39.6 1241.3 9.9 1243.3 6.8 100 402-22 165.7 254.8 0.65 27.0 0.1821 0.0037 0.5181 0.0046 13.0061 0.1206 2671.7 33.4 2691.1 19.5 2680.1 8.7 100 402-23 350.1 520.9 0.67 27.2 0.1724 0.0035 0.4597 0.0040 10.9253 0.0991 2580.7 33.6 2438.2 17.8 2516.8 8.4 103 402-24 409.0 614.2 0.67 25.6 0.1005 0.0021 0.2677 0.0023 3.7087 0.0344 1632.9 37.5 1529.0 11.9 1573.2 7.4 103 402-25 71.5 307.8 0.23 26.2 0.1123 0.0023 0.3327 0.0030 5.1518 0.0500 1836.8 36.9 1851.5 14.3 1844.7 8.3 100 402-26 120.8 231.5 0.52 24.8 0.0865 0.0018 0.2365 0.0021 2.8198 0.0305 1348.9 40.4 1368.3 11.1 1360.8 8.1 99 402-27 362.6 627.2 0.58 24.2 0.0712 0.0015 0.1506 0.0014 1.4777 0.0165 962.2 43.1 904.2 7.6 921.3 6.8 102 402-28 194.8 571.8 0.34 24.0 0.0705 0.0015 0.1611 0.0014 1.5662 0.0161 943.7 42.3 962.7 7.9 956.9 6.4 99 402-29 551.2 963.2 0.57 24.4 0.1061 0.0022 0.3355 0.0030 4.9078 0.0443 1733.0 36.8 1865.2 14.1 1803.6 7.6 97 402-30 29.9 49.7 0.60 26.5 0.0965 0.0022 0.2655 0.0026 3.5333 0.0510 1557.5 42.9 1518.1 13.5 1534.7 11.4 101 402-31 51.6 209.6 0.25 26.2 0.1108 0.0023 0.3324 0.0030 5.0803 0.0519 1813.2 37.5 1850.0 14.5 1832.8 8.7 99 402-32 81.6 209.0 0.39 26.6 0.0643 0.002 0.1122 0.0014 0.9950 0.0303 751.9 73.9 685.5 8.1 701.3 15.4 102 402-33 273.2 888.4 0.31 24.0 0.0712 0.0015 0.1612 0.0014 1.5824 0.0155 963.4 41.8 963.2 7.9 963.3 6.1 100 402-34 62.2 313.2 0.20 26.8 0.1294 0.0027 0.3835 0.0034 6.8425 0.0656 2089.9 35.8 2092.5 15.9 2091.2 8.5 100 402-35 78.5 118.4 0.66 24.6 0.0737 0.0017 0.1786 0.0017 1.8144 0.0261 1033.0 46.4 1059.1 9.3 1050.7 9.4 99 402-36 306.5 579.3 0.53 24.5 0.0809 0.0017 0.2051 0.0018 2.2874 0.0227 1218.2 40.3 1202.8 9.7 1208.4 7.0 100 402-37 22.9 1347.0 0.02 29.0 0.1151 0.0024 0.3241 0.0028 5.1425 0.0467 1881.0 36.3 1809.7 13.8 1843.1 7.7 102 402-38 268.9 175.1 1.54 24.0 0.0698 0.0016 0.1514 0.0014 1.4572 0.0189 922.1 45.5 908.9 7.9 912.8 7.8 100 402-39 324.3 295.2 1.10 24.2 0.0735 0.0016 0.1703 0.0016 1.7247 0.0198 1026.3 43.1 1013.7 8.5 1017.8 7.4 100 402-40 117.4 154.0 0.76 25.1 0.0803 0.0018 0.1865 0.0017 2.0635 0.0250 1203.2 42.7 1102.2 9.4 1136.8 8.3 103 402-41 227.9 600.0 0.38 27.1 0.1570 0.0032 0.4483 0.0040 9.7023 0.0933 2423.1 34.6 2387.6 18.0 2406.9 8.9 101 402-42 149.2 708.9 0.21 23.9 0.0736 0.0015 0.1831 0.0016 1.8579 0.0181 1030.2 41.4 1083.8 8.8 1066.2 6.4 98 402-43 58.5 323.7 0.18 30.6 0.1121 0.0024 0.2820 0.0026 4.3594 0.0499 1833.6 38.5 1601.5 13.3 1704.7 9.5 106 402-44 110.7 149.4 0.74 24.9 0.0816 0.0018 0.2088 0.0019 2.3501 0.0275 1236.0 41.8 1222.7 10.3 1227.6 8.3 100 402-45 146.3 147.5 0.99 23.5 0.0588 0.0015 0.0876 0.0008 0.7099 0.0123 559.5 54.3 541.1 5.0 544.7 7.3 101 402-46 215.9 474.8 0.45 24.3 0.0730 0.0016 0.1713 0.0015 1.7248 0.0184 1014.5 42.1 1019.2 8.5 1017.8 6.9 100 402-47 65.8 108.3 0.61 25.6 0.0841 0.0019 0.2129 0.0021 2.4673 0.0341 1293.7 44.1 1244.0 10.9 1262.5 10.0 101 402-48 123.0 168.4 0.73 24.7 0.0874 0.0019 0.2423 0.0022 2.920 0.0323 1369.4 40.6 1398.6 11.5 1387.2 8.4 99 402-49 98.5 158.9 0.62 24.5 0.0718 0.0017 0.1625 0.0015 1.6092 0.0223 980.0 46.1 970.9 8.5 973.8 8.7 100 402-50 136.5 328.4 0.42 24.4 0.0665 0.0015 0.1349 0.0012 1.2366 0.0151 822.1 45.4 815.4 7.0 817.4 6.9 100 402-51 161.7 173.7 0.93 25.0 0.0826 0.0018 0.2042 0.0019 2.3265 0.0271 1260.5 41.8 1197.6 10.1 1220.4 8.3 102 402-52 21.5 797.3 0.03 40.3 0.0755 0.0018 0.1607 0.0016 1.6726 0.0250 1081.5 46.8 960.5 8.7 998.2 9.5 104 402-53 111.0 386.0 0.29 24.5 0.0720 0.0016 0.1614 0.0015 1.6018 0.0179 985.5 43.1 964.3 8.1 970.9 7.0 101 402-54 156.2 294.8 0.53 23.8 0.0597 0.0014 0.0909 0.0009 0.7486 0.0108 593.0 49.4 561.0 5.0 567.4 6.3 101 402-55 121.2 307.9 0.39 25.4 0.0891 0.0019 0.2331 0.0021 2.8659 0.0302 1407.1 39.9 1350.8 11.1 1373.0 7.9 102 402-56 140.8 273.5 0.51 25.1 0.0795 0.0017 0.1966 0.0018 2.1545 0.0256 1183.7 42.6 1156.9 9.8 1166.5 8.2 101 402-57 110.4 142.9 0.77 25.3 0.0796 0.0018 0.1898 0.0018 2.0829 0.0292 1186.1 45.0 1120.5 9.9 1143.2 9.6 102 402-58 132.2 328.1 0.40 27.3 0.1691 0.0035 0.5123 0.0047 11.9482 0.1185 2548.9 34.4 2666.3 20.1 2600.4 9.3 98 402-59 153.1 1178.0 0.13 28.3 0.1412 0.0030 0.3710 0.0035 7.2235 0.0763 2241.6 36.1 2034.1 16.3 2139.4 9.4 105 402-60 159.8 188.4 0.85 26.7 0.1626 0.0034 0.4806 0.0044 10.7806 0.1048 2483.2 34.5 2530.0 19.0 2504.4 9.0 99 注：Pb*为放射性成因铅(Pb*=0.241*206Pb+0.221*207Pb+0.524*208Pb)，谐和度=100×年龄(207Pb/235U)/年龄(206Pb/238U)
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