江南古陆西北部塔下岩体年代学及成因研究
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位鸥祥,张达玉,刘劲松,陈雪锋,叶龙翔,蒋华,钱祥,周涛发
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Geochronology and Genesis of Taxia Granodiorite Intrusion in the Northwest Jiangnan Proterozoic Terrane
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Ouxiang WEI,Dayu ZHANG,Jinsong LIU,Xuefeng CHEN,Longxiang YE,Hua JIANG,Xiang QIAN,Taofa ZHOU
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表1 塔下花岗闪长岩中锆石的LA-ICP-MS U-Pb年龄测定结果
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Table 1 LA-ICP-MS U-Pb dating results of zircons from Taxia granodiorite
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样品编号 | Pbc /(×10-6) | 238U /(×10-6) | 232Th /(×10-6) | 232Th/238U | 207Pb/206Pb | 1? | 207Pb/235U | 1? | 206Pb/238U | 1? | 207Pb/206Pb年龄/Ma | 1? | 207Pb/235U 年龄/Ma | 1? | 206Pb/238U 年龄/Ma | 1? | TX-02-01 | 13.8 | 3 905 | 1 575 | 0.40 | 0.0888 | 0.0042 | 0.2254 | 0.0135 | 0.0178 | 0.0006 | 1 400 | 91.1 | 206 | 11.2 | 114 | 3.8 | TX-02-02 | 0.79 | 77.0 | 44.0 | 0.57 | 0.0656 | 0.0025 | 1.2407 | 0.0435 | 0.1321 | 0.0040 | 794 | 75.0 | 819 | 19.7 | 800 | 22.5 | TX-02-03 | 0.95 | 1 383 | 259 | 0.19 | 0.0575 | 0.0019 | 0.3125 | 0.0114 | 0.0385 | 0.0013 | 509 | 76.8 | 276 | 8.8 | 243 | 7.9 | TX-02-04 | 0.41 | 184 | 193 | 1.05 | 0.0662 | 0.0020 | 1.3265 | 0.0408 | 0.1462 | 0.0041 | 813 | 64.8 | 857 | 17.8 | 879 | 23.3 | TX-02-05 | 8.67 | 1 946 | 414 | 0.21 | 0.0740 | 0.0022 | 0.8608 | 0.0271 | 0.0846 | 0.0025 | 1 043 | 59.3 | 631 | 14.8 | 523 | 14.8 | TX-02-06 | 2.33 | 391 | 249 | 0.64 | 0.0626 | 0.0022 | 1.2052 | 0.0365 | 0.1342 | 0.0038 | 694 | 76.7 | 803 | 16.8 | 812 | 21.6 | TX-02-07 | 2.51 | 722 | 157 | 0.22 | 0.0556 | 0.0023 | 0.2881 | 0.0121 | 0.0374 | 0.0014 | 435 | 92.6 | 257 | 9.5 | 237 | 8.6 | TX-02-08 | 3.15 | 2 583 | 1 636 | 0.63 | 0.0671 | 0.0025 | 0.2418 | 0.0086 | 0.0254 | 0.0008 | 839 | 77.8 | 220 | 7.0 | 162 | 5.0 | TX-02-09 | 1.52 | 255 | 82.6 | 0.32 | 0.0645 | 0.0027 | 0.9272 | 0.0387 | 0.1024 | 0.0039 | 761 | 61.1 | 666 | 20.4 | 628 | 22.9 | TX-02-10 | 1.45 | 838 | 256 | 0.31 | 0.0642 | 0.0020 | 0.3191 | 0.0138 | 0.0357 | 0.0014 | 750 | 68.5 | 281 | 10.7 | 226 | 8.5 | TX-02-11 | 5.82 | 2 924 | 1 669 | 0.57 | 0.0633 | 0.0021 | 0.1768 | 0.0059 | 0.0203 | 0.0006 | 718 | 69.6 | 165 | 5.1 | 129 | 3.6 | TX-02-12 | 9.68 | 420 | 147 | 0.35 | 0.0678 | 0.0021 | 0.8522 | 0.0397 | 0.0907 | 0.0039 | 861 | 63.0 | 626 | 21.7 | 560 | 23.1 | TX-02-13 | 2.04 | 419 | 146 | 0.35 | 0.0723 | 0.0030 | 0.8463 | 0.0303 | 0.0845 | 0.0024 | 994 | 83.3 | 623 | 16.6 | 523 | 14.4 | TX-02-14 | 2.35 | 342 | 44.4 | 0.13 | 0.0627 | 0.0024 | 0.2472 | 0.0106 | 0.0288 | 0.0011 | 698 | 86.1 | 224 | 8.7 | 183 | 6.9 | TX-02-15 | 0.40 | 160 | 71.3 | 0.45 | 0.0678 | 0.0025 | 1.2975 | 0.0457 | 0.1392 | 0.0041 | 865 | 77.8 | 845 | 20.2 | 840 | 23.1 | TX-02-16 | 1.86 | 143 | 104 | 0.73 | 0.0664 | 0.0023 | 1.3042 | 0.0460 | 0.1422 | 0.0040 | 820 | 77.9 | 848 | 20.3 | 857 | 22.8 | TX-02-17 | 0.014 | 204 | 103 | 0.50 | 0.0654 | 0.0024 | 0.7951 | 0.0346 | 0.0879 | 0.0033 | 787 | 75.9 | 594 | 19.6 | 543 | 19.4 | TX-02-18 | 0 | 158 | 78.8 | 0.50 | 0.0686 | 0.0026 | 0.8630 | 0.0301 | 0.0916 | 0.0027 | 887 | 76.7 | 632 | 16.4 | 565 | 15.7 | TX-02-19 | 3.52 | 2 495 | 514 | 0.21 | 0.0582 | 0.0018 | 0.1720 | 0.0061 | 0.0213 | 0.0006 | 600 | 73.1 | 161 | 5.3 | 136 | 4.0 | TX-02-20 | 2.52 | 1 310 | 509 | 0.39 | 0.0518 | 0.0017 | 0.1861 | 0.0073 | 0.0258 | 0.0008 | 276 | 75.9 | 173 | 6.3 | 164 | 5.3 | TX-02-21 | 2.35 | 168 | 104 | 0.62 | 0.0794 | 0.0028 | 1.5266 | 0.0513 | 0.1386 | 0.0037 | 1 183 | 63.9 | 941 | 20.6 | 837 | 21.2 | TX-02-22 | 1.82 | 513 | 365 | 0.71 | 0.0871 | 0.0033 | 1.5124 | 0.0548 | 0.1206 | 0.0041 | 1 365 | 73.3 | 935 | 22.2 | 734 | 23.5 | TX-02-23 | 0.75 | 1 138 | 670 | 0.59 | 0.0541 | 0.0020 | 0.2355 | 0.0089 | 0.0315 | 0.0010 | 376 | 76.8 | 215 | 7.3 | 200 | 6.1 | TX-02-24 | 0.85 | 629 | 573 | 0.91 | 0.0513 | 0.0022 | 0.1650 | 0.0067 | 0.0233 | 0.0006 | 254 | 100.0 | 155 | 5.8 | 148 | 4.0 | TX-02-25 | 0.86 | 306 | 141 | 0.46 | 0.0703 | 0.0022 | 1.5158 | 0.0485 | 0.1555 | 0.0043 | 939 | 69.4 | 937 | 19.6 | 932 | 24.2 | TX-02-26 | 3.18 | 448 | 232 | 0.52 | 0.0690 | 0.0025 | 0.4979 | 0.0286 | 0.0509 | 0.0023 | 900 | 69.4 | 410 | 19.4 | 320 | 14.2 |
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