青海省天峻县阳康地区花岗岩岩体锆石U-Pb年代学及地球化学特征研究
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方永坤, 曹成刚, 董峻麟, 李领贵
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Geochronology and geochemistry of the granodiorite intrusion in Yangkang area of Qinghai Province and its geological significance
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FANG Yong-Kun, Cao Cheng-Gang, DONG Jun-Lin, LI Ling-Gui
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表1 阳康地区花岗闪长岩同位素测年结果
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Table 1 Isotopic dating results of granodiorite in Yangkang area
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样品号 | 含量/10-6 | 同位素比值 | 年龄/Ma | | Pb | U | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206U | 1σ | 208Pb/232U | 1σ | 232Pb/238U | 1σ | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206U | 1σ | 1 | 63 | 638 | 0.0707 | 0.0004 | 0.5532 | 0.0097 | 0.0568 | 0.0010 | 0.0226 | 0.0004 | 1.6932 | 0.0068 | 440 | 3 | 447 | 8 | 482 | 38 | 2 | 48 | 628 | 0.0707 | 0.0004 | 0.5410 | 0.0090 | 0.0555 | 0.0009 | 0.0235 | 0.0007 | 0.6166 | 0.0015 | 440 | 3 | 439 | 7 | 432 | 36 | 3 | 78 | 920 | 0.0710 | 0.0004 | 0.5520 | 0.0077 | 0.0564 | 0.0008 | 0.0240 | 0.0010 | 0.9622 | 0.0009 | 442 | 2 | 446 | 6 | 468 | 31 | 5 | 23 | 235 | 0.0721 | 0.0006 | 0.5671 | 0.0315 | 0.0571 | 0.0032 | 0.0277 | 0.0018 | 1.3363 | 0.0021 | 449 | 4 | 456 | 25 | 495 | 122 | 7 | 21 | 247 | 0.0713 | 0.0005 | 0.5598 | 0.0333 | 0.0569 | 0.0034 | 0.0330 | 0.0028 | 0.6607 | 0.0042 | 444 | 3 | 451 | 27 | 489 | 132 | 8 | 44 | 515 | 0.0706 | 0.0005 | 0.5488 | 0.0134 | 0.0564 | 0.0013 | 0.0355 | 0.0033 | 0.6807 | 0.0014 | 440 | 3 | 444 | 11 | 467 | 51 | 9 | 27 | 315 | 0.0719 | 0.0004 | 0.5660 | 0.0186 | 0.0571 | 0.0019 | 0.0310 | 0.0029 | 0.7146 | 0.0032 | 448 | 3 | 455 | 15 | 494 | 72 | 10 | 18 | 201 | 0.0720 | 0.0005 | 0.5630 | 0.0280 | 0.0567 | 0.0028 | 0.0290 | 0.0026 | 0.8715 | 0.0019 | 448 | 3 | 453 | 23 | 482 | 109 | 11 | 14 | 167 | 0.0718 | 0.0005 | 0.5527 | 0.0353 | 0.0559 | 0.0035 | 0.0300 | 0.0025 | 0.6928 | 0.0006 | 447 | 3 | 447 | 29 | 447 | 140 | 13 | 20 | 232 | 0.0719 | 0.0005 | 0.5566 | 0.0259 | 0.0561 | 0.0026 | 0.0234 | 0.0015 | 1.0709 | 0.0039 | 448 | 3 | 449 | 21 | 458 | 102 | 15 | 21 | 258 | 0.0713 | 0.0004 | 0.5546 | 0.0192 | 0.0564 | 0.0020 | 0.0219 | 0.0011 | 0.8837 | 0.0045 | 444 | 3 | 448 | 16 | 470 | 77 | 16 | 14 | 182 | 0.0716 | 0.0005 | 0.5564 | 0.0243 | 0.0564 | 0.0024 | 0.0201 | 0.0010 | 0.6374 | 0.0030 | 446 | 3 | 449 | 20 | 468 | 95 | 17 | 37 | 534 | 0.0712 | 0.0004 | 0.5471 | 0.0108 | 0.0557 | 0.0011 | 0.0182 | 0.0009 | 0.3169 | 0.0017 | 443 | 3 | 443 | 9 | 442 | 43 | 20 | 21 | 318 | 0.0718 | 0.0004 | 0.5666 | 0.0210 | 0.0572 | 0.0021 | 0.0201 | 0.0008 | 0.0628 | 0.0003 | 447 | 3 | 456 | 17 | 499 | 82 | 23 | 15 | 184 | 0.0708 | 0.0004 | 0.5558 | 0.0207 | 0.0569 | 0.0021 | 0.0201 | 0.0008 | 0.8942 | 0.0039 | 441 | 3 | 449 | 17 | 489 | 81 | 24 | 32 | 436 | 0.0717 | 0.0004 | 0.5524 | 0.0121 | 0.0559 | 0.0012 | 0.0180 | 0.0007 | 0.4893 | 0.0004 | 447 | 2 | 447 | 10 | 447 | 48 | 26 | 17 | 211 | 0.0714 | 0.0004 | 0.5634 | 0.0191 | 0.0572 | 0.0019 | 0.0192 | 0.0009 | 0.8418 | 0.0031 | 445 | 3 | 454 | 15 | 499 | 73 | 30 | 18 | 244 | 0.0712 | 0.0004 | 0.5579 | 0.0207 | 0.0568 | 0.0021 | 0.0205 | 0.0011 | 0.4750 | 0.0007 | 443 | 3 | 450 | 17 | 485 | 81 |
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