北祁连榆树沟山金矿区花岗闪长斑岩脉锆石U-Pb年龄、地球化学特征及其地质意义
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杨彦,黄增保,郭小刚,许延龙,颜华
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Zircon U-Pb Age and Geochemical Characteristics of Granodiorite Porphyry Veins in Yushugoushan Gold Deposit,Northern Qilian Mountain,and Its Geological Significance
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Yan YANG,Zengbao HUANG,Xiaogang GUO,Yanlong XU,Hua YAN
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表1 榆树沟山金矿花岗闪长斑岩锆石LA-ICP MS U-Pb测年结果
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Table 1 Zircon LA-ICP MS U-Pb dating results of granodiorite porphyry in Yushugoushan gold deposit
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分析点 | w(B)/(×10-6) | Th/U | 同位素比值 | 同位素年龄/Ma |
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Th | U | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ |
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2YTW-1-01 | 25.0 | 72.0 | 0.35 | 0.0577 | 0.0027 | 0.5381 | 0.0242 | 0.0685 | 0.0010 | 520 | 103 | 437 | 16 | 427 | 6 | 2YTW-1-02 | 42.5 | 103 | 0.41 | 0.0555 | 0.0021 | 0.5113 | 0.0180 | 0.0672 | 0.0007 | 432 | 88 | 419 | 12 | 419 | 5 | 2YTW-1-03 | 43.0 | 99.3 | 0.43 | 0.0540 | 0.0021 | 0.5132 | 0.0202 | 0.0689 | 0.0007 | 369 | 89 | 421 | 14 | 430 | 4 | 2YTW-1-04 | 86.9 | 160 | 0.54 | 0.0561 | 0.0019 | 0.5245 | 0.0177 | 0.0678 | 0.0006 | 457 | 71 | 428 | 12 | 423 | 4 | 2YTW-1-07 | 61.4 | 130 | 0.47 | 0.0539 | 0.0021 | 0.4990 | 0.0184 | 0.0673 | 0.0008 | 369 | 85 | 411 | 12 | 420 | 5 | 2YTW-1-08 | 27.1 | 67.7 | 0.40 | 0.0566 | 0.0028 | 0.5229 | 0.0245 | 0.0676 | 0.0009 | 476 | 109 | 427 | 16 | 422 | 5 | 2YTW-1-09 | 127 | 206 | 0.62 | 0.0570 | 0.0016 | 0.5268 | 0.0152 | 0.0669 | 0.0006 | 500 | 60 | 430 | 10 | 418 | 4 | 2YTW-1-10 | 61.9 | 120 | 0.52 | 0.0568 | 0.0021 | 0.5355 | 0.0199 | 0.0683 | 0.0008 | 483 | 47 | 435 | 13 | 426 | 5 | 2YTW-1-12 | 142 | 298 | 0.48 | 0.0571 | 0.0014 | 0.5495 | 0.0144 | 0.0694 | 0.0007 | 494 | 52 | 445 | 9 | 433 | 4 | 2YTW-1-13 | 247 | 403 | 0.61 | 0.0580 | 0.0012 | 0.5644 | 0.0119 | 0.0705 | 0.0006 | 528 | 44 | 454 | 8 | 439 | 3 | 2YTW-1-14 | 43.1 | 101 | 0.43 | 0.0563 | 0.0023 | 0.5206 | 0.0210 | 0.0674 | 0.0007 | 465 | 91 | 426 | 14 | 420 | 4 | 2YTW-1-15 | 60.2 | 117 | 0.52 | 0.0562 | 0.0020 | 0.5209 | 0.0181 | 0.0676 | 0.0008 | 461 | 75 | 426 | 12 | 421 | 5 | 2YTW-1-17 | 106 | 160 | 0.66 | 0.0566 | 0.0016 | 0.5179 | 0.0146 | 0.0665 | 0.0006 | 476 | 63 | 424 | 10 | 415 | 4 | 2YTW-1-20 | 34.8 | 77.9 | 0.45 | 0.0600 | 0.0028 | 0.5579 | 0.0268 | 0.0673 | 0.0010 | 611 | 104 | 450 | 17 | 420 | 6 | 2YTW-1-22 | 58.8 | 125 | 0.47 | 0.0567 | 0.0022 | 0.5283 | 0.0199 | 0.0677 | 0.0007 | 480 | 85 | 431 | 13 | 422 | 4 | 2YTW-1-23 | 59.8 | 128 | 0.47 | 0.0549 | 0.0020 | 0.5107 | 0.0183 | 0.0676 | 0.0007 | 406 | 81 | 419 | 12 | 421 | 4 | 2YTW-1-24 | 38.0 | 106 | 0.36 | 0.0541 | 0.0022 | 0.5007 | 0.0196 | 0.0672 | 0.0007 | 376 | 91 | 412 | 13 | 419 | 4 | 2YTW-1-05 | 157 | 360 | 0.44 | 0.1651 | 0.0024 | 10.1903 | 0.1496 | 0.4459 | 0.0031 | 2 509 | 25 | 2 452 | 14 | 2 377 | 14 | 2YTW-1-06 | 178 | 188 | 0.95 | 0.0758 | 0.0017 | 1.9384 | 0.0415 | 0.1849 | 0.0015 | 1 100 | 44 | 1 094 | 14 | 1 094 | 8 | 2YTW-1-11 | 118 | 273 | 0.43 | 0.0694 | 0.0014 | 1.2830 | 0.0429 | 0.1325 | 0.0032 | 911 | 36 | 838 | 19 | 802 | 18 | 2YTW-1-18 | 114 | 133 | 0.85 | 0.0702 | 0.0016 | 1.5593 | 0.0375 | 0.1608 | 0.0015 | 1 000 | 47 | 954 | 15 | 961 | 8 | 2YTW-1-21 | 233 | 352 | 0.66 | 0.1005 | 0.0015 | 3.3541 | 0.0745 | 0.2405 | 0.0035 | 1 633 | 28 | 1 494 | 17 | 1 389 | 18 | 2YTW-2-01 | 30.9 | 75.3 | 0.41 | 0.0564 | 0.0029 | 0.5393 | 0.0282 | 0.0691 | 0.0008 | 465 | 115 | 438 | 19 | 431 | 5 | 2YTW-2-02 | 82.5 | 133 | 0.62 | 0.0583 | 0.0022 | 0.5526 | 0.0231 | 0.0681 | 0.0008 | 543 | 82 | 447 | 15 | 424 | 5 | 2YTW-2-03 | 36.2 | 96.9 | 0.37 | 0.0469 | 0.0097 | 0.5433 | 0.1096 | 0.0675 | 0.0013 | 55.7 | 420 | 441 | 72 | 421 | 8 | 2YTW-2-04 | 31.9 | 67.4 | 0.47 | 0.0531 | 0.0030 | 0.5042 | 0.0263 | 0.0694 | 0.0009 | 332 | 131 | 415 | 18 | 433 | 5 | 2YTW-2-05 | 57.4 | 128 | 0.45 | 0.0553 | 0.0021 | 0.5209 | 0.0202 | 0.0682 | 0.0008 | 433 | 85 | 426 | 13 | 425 | 5 | 2YTW-2-06 | 24.9 | 67.0 | 0.37 | 0.0504 | 0.0026 | 0.4791 | 0.0238 | 0.0691 | 0.0009 | 213 | 114 | 397 | 16 | 431 | 5 | 2YTW-2-07 | 57.6 | 130 | 0.44 | 0.0530 | 0.0018 | 0.4850 | 0.0169 | 0.0666 | 0.0008 | 328 | 75 | 401 | 12 | 416 | 5 | 2YTW-2-08 | 133 | 223 | 0.60 | 0.0567 | 0.0016 | 0.5429 | 0.0156 | 0.0695 | 0.0009 | 480 | 61 | 440 | 10 | 433 | 5 | 2YTW-2-09 | 35.1 | 83.9 | 0.42 | 0.0555 | 0.0024 | 0.5266 | 0.0228 | 0.0689 | 0.0008 | 435 | 92 | 430 | 15 | 430 | 5 | 2YTW-2-10 | 36.8 | 75.9 | 0.49 | 0.0588 | 0.0025 | 0.5611 | 0.0232 | 0.0698 | 0.0009 | 561 | 93 | 452 | 15 | 435 | 6 | 2YTW-2-11 | 31.4 | 79.4 | 0.39 | 0.0564 | 0.0026 | 0.5130 | 0.0220 | 0.0667 | 0.0009 | 478 | 102 | 420 | 15 | 416 | 5 | 2YTW-2-12 | 99.8 | 178 | 0.56 | 0.0576 | 0.0018 | 0.5248 | 0.0159 | 0.0660 | 0.0006 | 522 | 67 | 428 | 11 | 412 | 4 | 2YTW-2-13 | 45.2 | 100 | 0.45 | 0.0545 | 0.0021 | 0.5135 | 0.0193 | 0.0683 | 0.0008 | 391 | 87 | 421 | 13 | 426 | 5 | 2YTW-2-14 | 59.5 | 143 | 0.42 | 0.0593 | 0.0020 | 0.5460 | 0.0178 | 0.0668 | 0.0007 | 589 | 76 | 442 | 12 | 417 | 4 | 2YTW-2-15 | 50.4 | 120 | 0.42 | 0.0597 | 0.0024 | 0.5490 | 0.0209 | 0.0668 | 0.0007 | 591 | 87 | 444 | 14 | 417 | 4 | 2YTW-2-16 | 34.8 | 87.6 | 0.40 | 0.0592 | 0.0021 | 0.5573 | 0.0199 | 0.0683 | 0.0009 | 576 | 80 | 450 | 13 | 426 | 6 | 2YTW-2-17 | 64.7 | 149 | 0.44 | 0.0603 | 0.0021 | 0.5538 | 0.0192 | 0.0664 | 0.0007 | 613 | 44 | 448 | 13 | 414 | 4 | 2YTW-2-19 | 58.6 | 119 | 0.49 | 0.0543 | 0.0022 | 0.5066 | 0.0209 | 0.0674 | 0.0007 | 383 | 86 | 416 | 14 | 420 | 4 | 2YTW-2-20 | 64.6 | 132 | 0.49 | 0.0578 | 0.0022 | 0.5448 | 0.0201 | 0.0683 | 0.0007 | 524 | 83 | 442 | 13 | 426 | 4 |
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