喜马拉雅夏如淡色花岗岩⁃伟晶岩的矿物学特征
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程飞越, 谢磊, 陈小明
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Mineralogical characteristics of the Xiaru leucogranite⁃pegmatite in the Himalayan oregen
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Feiyue Cheng, Lei Xie, Xiaoming Chen
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表3 夏如淡色花岗岩?伟晶岩中代表性电气石的主量(wt.%)和微量成分(×10-6)分析结果
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Table 3 Major (wt.%) and trace (×10-6) elements of representative tourmalines from the Xiaru leucogranite?pegmatite
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| 未矿化白云母花岗岩 | | 含铌钽钨白云母花岗岩 | | 含铌钽伟晶岩 |
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| 1 | 2 | 3 | 4 | | 5 | 6 | 7 | 8 | | 9 | 10 | 11 | 12 | EPMA (wt.%) | | | | | | | | | | | | | SiO2 | 34.01 | 34.52 | 34.52 | 34.95 | | 34.56 | 33.86 | 34.59 | 34.60 | | 33.96 | 34.81 | 35.11 | 33.87 | TiO2 | 0.35 | 0.20 | 0.33 | 0.32 | | 0.27 | 0.43 | 0.31 | 0.20 | | 0.62 | 0.24 | 0.46 | 1.21 | Al2O3 | 32.31 | 33.69 | 32.88 | 33.54 | | 34.20 | 32.27 | 33.65 | 34.24 | | 32.80 | 32.45 | 33.27 | 32.42 | Cr2O3 | 1.64 | 0.04 | - | 0.04 | | 0.01 | - | - | - | | - | 0.01 | - | - | FeO | 13.66 | 14.21 | 14.25 | 13.75 | | 15.11 | 16.76 | 15.46 | 15.01 | | 15.68 | 15.81 | 15.57 | 15.90 | MgO | 2.13 | 1.43 | 2.33 | 2.32 | | 0.76 | 0.65 | 0.66 | 0.54 | | 0.97 | 0.23 | 0.53 | 0.78 | CaO | 0.57 | 0.20 | 0.43 | 0.39 | | 0.11 | 0.28 | 0.14 | 0.10 | | 0.34 | 0.26 | 0.15 | 0.39 | MnO | 0.03 | 0.12 | 0.10 | 0.13 | | 0.10 | 0.11 | 0.10 | 0.12 | | 0.14 | 0.25 | 0.28 | 0.23 | Na2O | 1.92 | 2.01 | 2.16 | 1.91 | | 1.84 | 2.16 | 1.85 | 1.72 | | 1.98 | 1.96 | 2.12 | 2.11 | K2O | 0.08 | 0.05 | 0.05 | 0.04 | | 0.04 | 0.06 | 0.03 | 0.03 | | 0.07 | 0.04 | 0.03 | 0.02 | Cl | 0.02 | 0.01 | 0.02 | 0.01 | | - | 0.01 | - | - | | - | - | 0.01 | 0.01 | LA⁃ICP⁃MS (wt.%) | | | | | | | | | | | | | B2O3 | 10.20 | 9.76 | 9.60 | 9.73 | | 10.33 | 10.41 | 10.51 | 9.77 | | 9.78 | 9.68 | 9.68 | 9.55 | H2O* | 3.54 | 3.53 | 3.52 | 3.56 | | 3.57 | 3.51 | 3.57 | 3.53 | | 3.50 | 3.49 | 3.54 | 3.49 | Total* | 100.45 | 99.76 | 100.19 | 100.69 | | 100.9 | 100.52 | 100.86 | 99.86 | | 99.84 | 99.23 | 100.75 | 99.99 | 以31个阴离子(O2-,OH-,F-)计算 | | | | T: Si | 5.757 | 5.867 | 5.865 | 5.878 | | 5.806 | 5.775 | 5.816 | 5.879 | | 5.814 | 5.986 | 5.945 | 5.814 | Al | 0.243 | 0.133 | 0.135 | 0.122 | | 0.194 | 0.225 | 0.184 | 0.121 | | 0.186 | 0.014 | 0.055 | 0.186 | B | 2.980 | 2.862 | 2.815 | 2.824 | | 2.995 | 3.066 | 3.050 | 2.865 | | 2.891 | 2.874 | 2.828 | 2.830 | Z: Al | 6.000 | 6.000 | 6.000 | 6.000 | | 6.000 | 6.000 | 6.000 | 6.000 | | 6.000 | 6.000 | 6.000 | 6.000 | Y: Al | 0.203 | 0.614 | 0.450 | 0.526 | | 0.578 | 0.261 | 0.484 | 0.735 | | 0.432 | 0.562 | 0.584 | 0.373 | Ti | 0.045 | 0.026 | 0.042 | 0.040 | | 0.034 | 0.055 | 0.039 | 0.026 | | 0.080 | 0.031 | 0.059 | 0.156 | Cr | 0.219 | 0.005 | | 0.005 | | 0.001 | | | | | | 0.001 | | | Mg | 0.538 | 0.362 | 0.590 | 0.582 | | 0.190 | 0.165 | 0.165 | 0.137 | | 0.248 | 0.059 | 0.134 | 0.200 | Mn | 0.004 | 0.017 | 0.014 | 0.019 | | 0.014 | 0.016 | 0.014 | 0.017 | | 0.020 | 0.036 | 0.040 | 0.033 | | 1 | 2 | 3 | 4 | | 5 | 6 | 7 | 8 | | 9 | 10 | 11 | 12 | Fe2+ | 1.934 | 2.020 | 2.025 | 1.934 | | 2.123 | 2.390 | 2.174 | 2.133 | | 2.245 | 2.274 | 2.205 | 2.282 | ∑Y | 2.994 | 3.087 | 3.154 | 3.160 | | 2.973 | 2.937 | 2.935 | 3.083 | | 3.100 | 3.044 | 3.091 | 3.117 | X: Ca | 0.103 | 0.036 | 0.078 | 0.070 | | 0.020 | 0.051 | 0.025 | 0.018 | | 0.062 | 0.048 | 0.027 | 0.072 | Na | 0.630 | 0.662 | 0.712 | 0.623 | | 0.599 | 0.714 | 0.603 | 0.567 | | 0.657 | 0.653 | 0.696 | 0.702 | K | 0.017 | 0.011 | 0.011 | 0.009 | | 0.009 | 0.013 | 0.006 | 0.007 | | 0.015 | 0.009 | 0.006 | 0.004 | X□ | 0.249 | 0.290 | 0.199 | 0.298 | | 0.372 | 0.222 | 0.365 | 0.409 | | 0.265 | 0.290 | 0.270 | 0.222 | OH | 3.994 | 3.997 | 3.994 | 3.997 | | 4.000 | 3.997 | 4.000 | 4.000 | | 4.000 | 4.000 | 3.997 | 3.997 | Cl | 0.006 | 0.003 | 0.006 | 0.003 | | | 0.003 | | | | | | 0.003 | 0.003 | Mg/(Mg+Fe) | 0.22 | 0.15 | 0.23 | 0.23 | | 0.08 | 0.06 | 0.07 | 0.06 | | 0.10 | 0.03 | 0.06 | 0.08 | LA⁃ICP⁃MS (×10-6) | | | | | | | | | | | | | | Li | 350 | 289 | 223 | 372 | | 225 | 332 | 404 | 247 | | 509 | 544 | 471 | 487 | Be | 2.8 | 11 | 1.0 | 6.4 | | 8.2 | 0.92 | 6.1 | 9.2 | | 10 | 11 | 13 | 9.5 | V | 72 | 29 | 36 | 23 | | 3.7 | 2.5 | 2.1 | 2.3 | | 18 | 24 | 25 | 23 | Co | 20 | 13 | 17 | 18 | | 8.2 | 4.7 | 9.1 | 10 | | 2.8 | 3.1 | 2.8 | 3.1 | Ni | 15 | 5.1 | 8.6 | 5.8 | | 0.55 | 0.28 | 0.41 | 0.48 | | 0.57 | - | 0.12 | 0.14 | Cu | - | 0.35 | - | 0.69 | | - | 0.15 | - | - | | 2.3 | 1.6 | - | - | Zn | 220 | 194 | 193 | 251 | | 269 | 257 | 414 | 408 | | 1294 | 1232 | 1207 | 1234 | Ga | 91 | 117 | 116 | 63 | | 123 | 132 | 87 | 90 | | 144 | 147 | 134 | 119 | Ge | 1.7 | 5.9 | 2.3 | 3.3 | | 2.5 | 5.1 | 4.3 | 5.7 | | 5.1 | 5.1 | 3.5 | 2.1 | Rb | - | 0.06 | 0.06 | 0.04 | | - | - | - | - | | - | 0.39 | 0.22 | - | Sr | 9.3 | 4.4 | 7.3 | 21 | | 0.71 | 0.16 | 4.5 | 2.2 | | 4.0 | 4.7 | 4.1 | 3.8 | Y | 0.10 | 0.01 | 0.02 | 0.51 | | 0.03 | - | 0.02 | - | | 0.10 | 0.43 | 0.01 | 0.01 | Zr | 0.16 | 0.11 | 0.18 | 0.02 | | 0.12 | 0.10 | 0.02 | 0.09 | | 0.10 | 0.03 | 0.08 | - | Nb | 1.5 | 1.4 | 1.3 | 0.35 | | 1.5 | 0.58 | 1.1 | 0.51 | | 0.92 | 1.4 | 0.99 | 1.1 | Mo | 0.39 | - | 0.23 | - | | - | 0.08 | 0.07 | - | | - | 0.07 | 0.08 | - | Ag | 0.02 | - | - | 0.25 | | 0.12 | 0.43 | 0.09 | 0.05 | | - | - | - | 0.20 | Cd | - | 0.06 | - | - | | 0.15 | - | - | - | | 0.07 | 0.54 | 0.28 | - | In | 0.19 | 0.22 | 0.20 | 0.08 | | 0.17 | 0.18 | 0.10 | 0.09 | | 0.14 | 0.19 | 0.13 | 0.22 | Sn | 26 | 36 | 44 | 11 | | 28 | 32 | 15 | 14 | | 16 | 21 | 17 | 12 | Sb | - | - | 0.15 | 0.42 | | 0.03 | 0.10 | 0.04 | - | | 0.04 | - | - | - | Cs | - | 0.02 | 0.04 | - | | - | - | 0.02 | 0.05 | | 0.09 | 0.16 | 0.02 | 0.02 | Ba | - | - | - | 0.06 | | - | 0.07 | - | - | | - | - | - | - | Ta | 0.49 | 1.2 | 0.44 | 0.14 | | 0.63 | 0.28 | 0.62 | 0.26 | | 0.43 | 0.71 | 0.84 | 0.63 | W | 0.07 | - | 0.10 | - | | 0.07 | - | 0.06 | - | | 0.03 | 0.02 | 0.03 | 0.04 | Bi | 0.02 | 0.01 | 0.00 | 0.03 | | - | 0.02 | - | 0.02 | | 0.03 | 0.04 | 0.04 | - | Pb | 2.5 | 1.5 | 2.2 | 5.6 | | 0.81 | 0.33 | 6.6 | 2.3 | | 8.1 | 10 | 10 | 7.2 | Th | 0.01 | - | 0.01 | 0.03 | | 0.00 | 0.00 | 0.00 | - | | 0.01 | - | 0.00 | 0.01 | U | - | - | - | - | | - | - | - | - | | - | 0.01 | 0.00 | - |
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