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

杨彦,黄增保,郭小刚,许延龙,颜华

Zircon U-Pb Age and Geochemical Characteristics of Granodiorite Porphyry Veins in Yushugoushan Gold Deposit，Northern Qilian Mountain，and Its Geological Significance

Yan YANG,Zengbao HUANG,Xiaogang GUO,Yanlong XU,Hua YAN

表2 榆树沟山金矿花岗闪长斑岩锆石Hf同位素分析结果

Table 2 Zircon Hf isotopic analysis results of granodiorite porphyry in Yushugoushan gold deposit

分析点 年龄/Ma 176Lu/177Hf 176Yb/177Hf 176Hf/177Hf 1σ εHf（t） 1σ TDM1/Ma TDM2/Ma fLu/Hf 2YTW-1-01 427 0.000891 0.033070 0.282808 0.000012 10.42 0.69 628 708 -0.97 2YTW-1-02 419 0.000821 0.029117 0.282830 0.000012 11.08 0.68 595 665 -0.98 2YTW-1-03 430 0.000914 0.033599 0.282781 0.000013 9.52 0.71 666 760 -0.97 2YTW-1-04 423 0.000933 0.033873 0.282802 0.000014 10.10 0.74 637 723 -0.97 2YTW-1-07 420 0.000676 0.023652 0.282788 0.000013 9.62 0.71 653 747 -0.98 2YTW-1-08 422 0.000651 0.023588 0.282759 0.000012 8.65 0.69 692 802 -0.98 2YTW-1-09 418 0.001001 0.036883 0.282805 0.000014 10.10 0.73 633 718 -0.97 2YTW-1-10 426 0.000932 0.033217 0.282786 0.000013 9.63 0.72 659 751 -0.97 2YTW-1-12 433 0.001279 0.042216 0.282299 0.000014 -7.59 0.73 1 355 1 710 -0.96 2YTW-1-13 439 0.001456 0.055032 0.282447 0.000015 -2.24 0.76 1 151 1 420 -0.96 2YTW-1-14 420 0.000712 0.024911 0.282781 0.000014 9.36 0.73 663 762 -0.98 2YTW-1-15 421 0.000880 0.029601 0.282775 0.000014 9.14 0.73 674 775 -0.97 2YTW-1-17 415 0.000987 0.033738 0.282733 0.000015 7.50 0.77 735 861 -0.97 2YTW-1-20 420 0.000807 0.026503 0.282765 0.000015 8.78 0.75 687 794 -0.98 2YTW-1-22 422 0.000903 0.030813 0.282779 0.000015 9.28 0.75 669 767 -0.97 2YTW-1-23 421 0.000984 0.033896 0.282760 0.000015 8.59 0.77 697 805 -0.97 2YTW-1-24 419 0.000830 0.030687 0.282823 0.000012 10.81 0.69 605 680 -0.97 2YTW-1-05 2 377 0.000503 0.019017 0.281561 0.000020 9.72 0.98 2 335 2 317 -0.98 2YTW-1-06 1 094 0.000732 0.027900 0.281993 0.000013 -3.86 0.76 1 758 2 027 -0.98 2YTW-1-11 802 0.000704 0.026321 0.282647 0.000013 12.94 0.74 850 869 -0.98 2YTW-1-18 961 0.000695 0.025192 0.282054 0.000013 -4.57 0.74 1 672 1 961 -0.98 2YTW-1-21 1 389 0.000904 0.032823 0.282475 0.000021 19.55 0.96 1 096 980 -0.97