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3 榆树沟山金矿花岗闪长斑岩主量元素(%)和微量元素(×10-6)分析结果
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Table 3 Analysis results of major elements(%) and trace elements(×10-6)of granodiorite porphyry in Yushugoushan gold deposit
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元素(化合物)名称 | 样品编号及分析结果 |
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2YY-1 | 2YY-2 | 2YY-3 | 2YY-4 | 2YY-5 | 2YY-6 | 2YY-7 | 2YY-8 | 2YY-9 |
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SiO2 | 67.2 | 67.9 | 66.2 | 65.9 | 66.9 | 66.5 | 64.9 | 67.1 | 66.5 | TiO2 | 0.21 | 0.20 | 0.20 | 0.20 | 0.22 | 0.21 | 0.20 | 0.21 | 0.20 | Al2O3 | 16.1 | 15.7 | 16.7 | 16.1 | 17.2 | 16.5 | 16.5 | 16.4 | 15.9 | TFe2O3 | 1.82 | 1.58 | 1.57 | 2.43 | 1.90 | 2.11 | 1.78 | 1.71 | 1.78 | FeO | 0.80 | 0.70 | 0.54 | 0.54 | 0.30 | 0.50 | 0.60 | 0.82 | 0.82 | MnO | 0.04 | 0.03 | 0.04 | 0.08 | 0.05 | 0.05 | 0.04 | 0.04 | 0.18 | MgO | 1.41 | 1.08 | 1.12 | 1.24 | 0.91 | 1.06 | 1.39 | 1.43 | 1.37 | CaO | 2.47 | 2.42 | 2.85 | 2.87 | 2.04 | 2.54 | 3.33 | 2.10 | 2.30 | Na2O | 4.46 | 4.70 | 4.56 | 4.07 | 4.48 | 4.38 | 4.35 | 4.51 | 3.94 | K2O | 2.17 | 1.73 | 1.61 | 2.39 | 2.11 | 2.22 | 1.70 | 2.05 | 2.92 | P2O5 | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 | 0.06 | 0.07 | 0.07 | LOI | 4.20 | 4.36 | 4.89 | 4.63 | 4.01 | 3.91 | 5.89 | 3.98 | 4.53 | total | 100 | 99.7 | 99.8 | 100 | 99.9 | 99.6 | 100 | 99.5 | 99.7 | Mg# | 37 | 35 | 36 | 28 | 27 | 28 | 38 | 39 | 37 | A/NCK | 1.14 | 1.12 | 1.16 | 1.11 | 1.29 | 1.16 | 1.10 | 1.22 | 1.15 | σ | 1.82 | 1.66 | 1.64 | 1.82 | 1.82 | 1.85 | 1.67 | 1.79 | 2.00 | Li | 31.5 | 37.7 | 33.4 | 19.6 | 36.8 | 23.0 | 8.31 | 42.1 | 3.92 | Be | 1.17 | 0.95 | 1.18 | 1.09 | 1.19 | 1.03 | 1.09 | 1.47 | 1.56 | Sc | 3.58 | 3.28 | 3.45 | 3.68 | 3.96 | 3.85 | 3.45 | 3.38 | 3.39 | V | 23.1 | 22.5 | 22.2 | 24.7 | 27.1 | 24.9 | 23.0 | 22.9 | 24.7 | Cr | 24.6 | 22.7 | 31.6 | 32.9 | 37.3 | 35.6 | 32.1 | 24.1 | 23.1 | Co | 4.26 | 3.81 | 4.15 | 5.93 | 4.69 | 5.06 | 4.86 | 4.68 | 3.26 | Ni | 17.2 | 15.0 | 12.7 | 22.8 | 16.6 | 26.0 | 20.6 | 18.5 | 11.1 | Cu | 8.10 | 6.50 | 2.34 | 8.43 | 10.4 | 3.24 | 2.74 | 8.48 | 3.23 | Zn | 23.3 | 19.5 | 12.7 | 21.9 | 16.9 | 19.8 | 20.6 | 29.9 | 12.1 | Ga | 17.0 | 16.2 | 16.8 | 17.0 | 18.2 | 17.5 | 17.4 | 17.3 | 17.3 | Rb | 82.5 | 65.3 | 54.1 | 93.7 | 77.1 | 87.0 | 57.1 | 79.1 | 123 | Hf | 2.43 | 2.26 | 2.27 | 2.33 | 2.44 | 2.46 | 2.19 | 2.58 | 2.56 | Ta | 0.11 | 0.12 | 0.10 | 0.11 | 0.13 | 0.13 | 0.09 | 0.11 | 0.11 | Tl | 0.44 | 0.39 | 0.31 | 0.53 | 0.43 | 0.45 | 0.32 | 0.47 | 0.65 | Pb | 8.29 | 6.42 | 5.93 | 4.23 | 6.17 | 5.05 | 4.53 | 6.47 | 7.18 | Th | 1.90 | 1.80 | 1.64 | 2.07 | 2.12 | 2.12 | 1.67 | 1.93 | 1.90 | U | 1.61 | 0.85 | 0.69 | 1.00 | 1.14 | 1.10 | 0.84 | 1.08 | 0.85 | Sr | 482 | 374 | 411 | 329 | 352 | 365 | 289 | 486 | 352 | Y | 5.06 | 4.44 | 4.32 | 5.05 | 4.99 | 5.20 | 4.11 | 5.48 | 5.15 | Zr | 81.0 | 73.7 | 71.9 | 72.4 | 80.3 | 76.1 | 68.8 | 81.3 | 82.8 | Nb | 1.51 | 1.45 | 1.36 | 1.67 | 1.80 | 1.65 | 1.29 | 1.58 | 1.51 | Sn | 0.56 | 0.50 | 0.49 | 0.53 | 0.58 | 0.53 | 0.41 | 0.60 | 0.53 | Cs | 5.35 | 4.34 | 3.50 | 5.31 | 5.13 | 5.07 | 3.97 | 5.42 | 6.83 | Ba | 295 | 282 | 585 | 748 | 305 | 385 | 233 | 285 | 502 | Sr/Y | 95.3 | 84.0 | 95.2 | 65.1 | 70.5 | 70.2 | 70.4 | 88.7 | 68.2 | La | 5.44 | 5.54 | 5.29 | 5.86 | 5.91 | 5.84 | 5.21 | 5.86 | 5.69 | Ce | 11.7 | 11.7 | 11.2 | 12.3 | 12.5 | 12.3 | 11.1 | 12.8 | 12.2 | Pr | 1.50 | 1.55 | 1.46 | 1.59 | 1.63 | 1.62 | 1.46 | 1.68 | 1.57 | Nd | 6.12 | 6.33 | 5.87 | 6.32 | 6.46 | 6.49 | 6.03 | 6.78 | 6.44 | Sm | 1.25 | 1.40 | 1.39 | 1.46 | 1.43 | 1.54 | 1.37 | 1.68 | 1.50 | Eu | 0.40 | 0.37 | 0.42 | 0.52 | 0.44 | 0.47 | 0.40 | 0.41 | 0.47 | Gd | 1.23 | 1.10 | 1.21 | 1.19 | 1.25 | 1.28 | 1.10 | 1.27 | 1.25 | Tb | 0.18 | 0.17 | 0.16 | 0.18 | 0.18 | 0.18 | 0.15 | 0.18 | 0.17 | Dy | 0.89 | 0.90 | 0.86 | 0.92 | 0.96 | 1.03 | 0.80 | 1.04 | 0.99 | Ho | 0.18 | 0.15 | 0.16 | 0.18 | 0.18 | 0.17 | 0.15 | 0.18 | 0.16 | Er | 0.45 | 0.45 | 0.38 | 0.48 | 0.48 | 0.47 | 0.39 | 0.47 | 0.47 | Tm | 0.06 | 0.06 | 0.06 | 0.07 | 0.07 | 0.07 | 0.06 | 0.07 | 0.06 | Yb | 0.40 | 0.38 | 0.39 | 0.45 | 0.47 | 0.45 | 0.38 | 0.49 | 0.43 | Lu | 0.06 | 0.06 | 0.06 | 0.07 | 0.08 | 0.07 | 0.05 | 0.07 | 0.07 | ∑REE | 29.9 | 30.1 | 28.9 | 31.6 | 32.0 | 32.0 | 28.7 | 32.9 | 31.5 | δEu | 0.91 | 0.83 | 0.89 | 0.97 | 0.90 | 0.90 | 0.87 | 0.79 | 0.91 | (La/Yb)N | 9.06 | 9.89 | 9.24 | 8.70 | 8.55 | 8.69 | 9.25 | 8.03 | 8.86 |
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