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2 夏如淡色花岗岩?伟晶岩中白云母化学成分
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Table 2 Chemical compositions of micas from the Xiaru leucogranite?pegmatite
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| 未矿化白云母花岗岩 | 平均 | | 含钨白云母花岗岩 | 平均 | | 含铌钽钨白云母花岗岩 | 平均 | | 含铌钽伟晶岩 | 平均 | | |
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| 1 | 2 | 3 | n=10 | | 4 | 5 | n=7 | | 6 | 7 | 8 | n=14 | | 9 | 10 | 11 | 12 | n=19 | | | EPMA (wt.%) | | | SiO2 | 46.26 | 46.06 | 46.64 | 45.87 | | 46.64 | 45.43 | 45.77 | | 45.28 | 45.67 | 46.68 | 45.58 | | 45.21 | 45.93 | 46.03 | 46.36 | 45.70 | | | TiO2 | 0.59 | 0.55 | 0.87 | 0.61 | | 0.66 | 0.43 | 0.63 | | 0.58 | 0.56 | 0.42 | 0.45 | | 0.36 | 0.18 | 0.14 | 0.31 | 0.25 | | | Al2O3 | 29.68 | 30.48 | 32.37 | 30.35 | | 30.20 | 31.58 | 30.59 | | 33.66 | 33.76 | 32.33 | 33.53 | | 35.23 | 35.41 | 35.86 | 33.19 | 34.62 | | | FeO | 6.37 | 5.93 | 6.59 | 6.04 | | 5.63 | 5.29 | 5.73 | | 4.41 | 4.27 | 5.05 | 4.47 | | 3.44 | 2.39 | 2.62 | 3.98 | 3.36 | | | MnO | 0.19 | 0.26 | 0.26 | 0.21 | | 0.14 | 0.18 | 0.17 | | 0.11 | 0.14 | 0.14 | 0.12 | | 0.09 | 0.07 | 0.19 | 0.10 | 0.11 | | | MgO | 1.05 | 0.72 | 1.05 | 0.83 | | 0.73 | 0.48 | 0.64 | | 0.18 | 0.21 | 0.26 | 0.19 | | 0.35 | 0.51 | 0.13 | 0.43 | 0.32 | | | CaO | 0.02 | - | 0.05 | 0.02 | | 0.01 | - | 0.01 | | - | 0.01 | - | 0.00 | | - | 0.05 | 0.02 | 0.01 | 0.02 | | | Na2O | 0.18 | 0.19 | 0.40 | 0.25 | | 0.40 | 0.29 | 0.29 | | 0.32 | 0.42 | 0.34 | 0.37 | | 0.32 | 0.20 | 0.15 | 0.29 | 0.32 | | | K2O | 10.45 | 10.35 | 10.48 | 10.30 | | 10.03 | 10.40 | 10.19 | | 10.33 | 10.32 | 10.18 | 10.28 | | 10.53 | 10.53 | 10.43 | 10.02 | 10.25 | | | F | 0.59 | 0.18 | 0.67 | 0.34 | | 0.50 | 0.23 | 0.41 | | 0.37 | 0.38 | 0.50 | 0.37 | | 0.13 | 0.12 | - | 0.04 | 0.10 | | | Cl | 0.00 | - | 0.01 | 0.00 | | 0.01 | - | 0.00 | | 0.00 | 0.00 | 0.00 | 0.00 | | - | 0.00 | 0.00 | 0.00 | 0.00 | | | H2O* | 4.11 | 4.29 | 4.40 | 4.22 | | 4.16 | 4.29 | 4.19 | | 4.26 | 4.28 | 4.22 | 4.26 | | 4.42 | 4.44 | 4.51 | 4.44 | 4.41 | | | O=F,Cl | 0.25 | 0.08 | 0.28 | 0.14 | | 0.21 | 0.10 | 0.17 | | 0.16 | 0.16 | 0.21 | 0.16 | | 0.05 | 0.05 | - | 0.02 | 0.04 | | | LA⁃ICP⁃MS (wt.%) | | | | | | | | | | | | | | Li2O | 0.65 | 0.33 | 0.88 | 0.56 | | 0.43 | 0.87 | 0.65 | | 0.30 | 0.35 | 0.34 | 0.33 | | 0.24 | 0.24 | 0.14 | 0.43 | 0.24 | | | Rb2O | 0.29 | 0.33 | 0.39 | 0.32 | | 0.37 | 0.37 | 0.35 | | 0.28 | 0.28 | 0.36 | 0.30 | | 0.28 | 0.27 | 0.43 | 0.22 | 0.30 | | | Cs2O | 0.03 | 0.03 | 0.04 | 0.03 | | 0.02 | 0.03 | 0.02 | | 0.01 | 0.01 | 0.02 | 0.02 | | 0.01 | 0.01 | 0.02 | 0.00 | 0.02 | | | Total | 100.20 | 99.62 | 100.20 | 99.74 | | 99.71 | 99.76 | 99.46 | | 99.94 | 100.51 | 100.64 | 100.12 | | 100.56 | 100.30 | 100.67 | 99.80 | 99.98 | | | 以22个O原子计算 | | | | | | | | | | | | | | Si | 6.314 | 6.308 | 6.405 | 6.278 | | 6.359 | 6.192 | 6.267 | | 6.127 | 6.139 | 6.280 | 6.155 | | 6.052 | 6.121 | 6.120 | 6.237 | 6.138 | | | Al iv | 1.686 | 1.692 | 1.893 | 1.722 | | 1.641 | 1.808 | 1.733 | | 1.873 | 1.861 | 1.720 | 1.845 | | 1.948 | 1.879 | 1.880 | 1.763 | 1.862 | | | Al vi | 3.088 | 3.228 | 3.327 | 3.169 | | 3.212 | 3.265 | 3.204 | | 3.495 | 3.488 | 3.407 | 3.492 | | 3.612 | 3.683 | 3.741 | 3.500 | 3.618 | | | Ti | 0.060 | 0.057 | 0.090 | 0.063 | | 0.068 | 0.044 | 0.065 | | 0.059 | 0.057 | 0.042 | 0.046 | | 0.036 | 0.018 | 0.014 | 0.031 | 0.025 | | | Fe | 0.727 | 0.679 | 0.756 | 0.691 | | 0.641 | 0.603 | 0.657 | | 0.499 | 0.480 | 0.569 | 0.505 | | 0.385 | 0.266 | 0.291 | 0.448 | 0.378 | | | Mn | 0.022 | 0.030 | 0.030 | 0.025 | | 0.017 | 0.021 | 0.019 | | 0.013 | 0.016 | 0.016 | 0.014 | | 0.011 | 0.008 | 0.022 | 0.011 | 0.013 | | | Mg | 0.214 | 0.146 | 0.214 | 0.170 | | 0.149 | 0.098 | 0.130 | | 0.037 | 0.041 | 0.053 | 0.038 | | 0.071 | 0.102 | 0.026 | 0.086 | 0.063 | | | Li | 0.358 | 0.182 | 0.483 | 0.308 | | 0.235 | 0.475 | 0.359 | | 0.165 | 0.188 | 0.187 | 0.177 | | 0.130 | 0.127 | 0.075 | 0.234 | 0.129 | | | Ca | 0.004 | | 0.007 | 0.003 | | 0.001 | | 0.001 | | | 0.001 | | 0.001 | | | 0.007 | 0.002 | 0.001 | 0.003 | | | Na | 0.048 | 0.051 | 0.106 | 0.067 | | 0.106 | 0.076 | 0.077 | | 0.084 | 0.109 | 0.089 | 0.096 | | 0.084 | 0.051 | 0.039 | 0.075 | 0.084 | | | K | 1.818 | 1.807 | 1.839 | 1.799 | | 1.744 | 1.807 | 1.780 | | 1.782 | 1.770 | 1.747 | 1.770 | | 1.798 | 1.791 | 1.769 | 1.720 | 1.756 | | | Rb | 0.025 | 0.029 | 0.034 | 0.028 | | 0.032 | 0.032 | 0.031 | | 0.025 | 0.024 | 0.031 | 0.026 | | 0.024 | 0.023 | 0.036 | 0.019 | 0.026 | | | Cs | 0.002 | 0.002 | 0.002 | 0.002 | | 0.001 | 0.002 | 0.001 | | 0.001 | 0.001 | 0.001 | 0.001 | | 0.001 | 0.001 | 0.001 | 0.000 | 0.001 | | | F | 0.255 | 0.078 | 0.291 | 0.148 | | 0.217 | 0.097 | 0.176 | | 0.159 | 0.163 | 0.213 | 0.158 | | 0.054 | 0.050 | | 0.017 | 0.044 | | | Cl | 0.001 | | 0.003 | 0.001 | | 0.003 | | 0.001 | | 0.000 | 0.000 | 0.001 | 0.001 | | | 0.000 | 0.000 | 0.000 | 0.001 | | | OH* | 3.744 | 3.922 | 4.000 | 3.852 | | 3.780 | 3.903 | 3.823 | | 3.841 | 3.837 | 3.786 | 3.841 | | 3.946 | 3.950 | 4.000 | 3.983 | 3.955 | | | LA⁃ICP⁃MS (×10-6) | | | | | | | | | | | | | | Be | 34 | 39 | 47 | 35 | | 22 | 23 | 24 | | 39 | 27 | 35 | 32 | | 26 | 32 | 46 | 26 | 31 | | | B | 71 | 72 | 189 | 100 | | 125 | 168 | 122 | | 144 | 139 | 104 | 166 | | 98 | 170 | 348 | 124 | 174 | | | Sc | 61 | 47 | 61 | 49 | | 49 | 43 | 50 | | 114 | 107 | 131 | 116 | | 96 | 63 | 11 | 31 | 57 | | | V | 23 | 21 | 25 | 20 | | 14 | 14 | 15 | | 2.0 | 2.3 | 1.9 | 2.0 | | 4.1 | 0.40 | 0.99 | 18 | 5.5 | | | Cr | 4 | 12 | 51 | 10 | | 7.5 | 51 | 13 | | - | - | 1.4 | 2.5 | | 1.5 | - | 2.3 | 2.7 | 2.3 | | | Co | 2.6 | 3.4 | 3.5 | 2.9 | | 2.8 | 3.0 | 2.6 | | 0.32 | - | 1.3 | 1.0 | | 1.6 | 0.63 | - | - | 0.62 | | | Ni | 2.1 | 0.93 | 2.8 | 1.6 | | 2.3 | 2.6 | 1.4 | | - | 0.66 | - | 0.22 | | 0.63 | 0.67 | - | - | 0.20 | | | Cu | - | 1.1 | 2.1 | 0.66 | | 0.68 | 0.48 | 0.45 | | 0.38 | 0.72 | 0.05 | 0.48 | | 1.1 | - | 0.15 | - | 1.2 | | | Zn | 90 | 109 | 115 | 97 | | 114 | 113 | 104 | | 77 | 78 | 72 | 78 | | 124 | 166 | 275 | 135 | 143 | | | Ga | 102 | 98 | 116 | 94 | | 104 | 101 | 107 | | 150 | 147 | 167 | 157 | | 151 | 135 | 212 | 187 | 167 | | | Ge | 2.1 | 3.7 | 6.3 | 4.1 | | 3.6 | 2.6 | 3.2 | | 2.8 | 4.4 | 6.8 | 5.1 | | 6.4 | 4.9 | 3.3 | 3.9 | 5.3 | | | Sr | 1.1 | 1.6 | 2.2 | 1.4 | | 1.3 | 2.2 | 1.4 | | 0.68 | 0.70 | 0.79 | 0.68 | | 0.74 | 0.82 | 0.14 | 0.87 | 0.93 | | | | 1 | 2 | 3 | n=10 | | 4 | 5 | n=7 | | 6 | 7 | 8 | n=14 | | 9 | 10 | 11 | 12 | n=19 | | | Zr | 0.49 | 1.2 | 1.2 | 0.84 | | 0.77 | 1.0 | 0.90 | | 0.91 | 0.93 | 0.68 | 0.80 | | 0.94 | 0.67 | 1.4 | 0.15 | 0.68 | | | Nb | 196 | 209 | 341 | 233 | | 247 | 314 | 298 | | 343 | 354 | 295 | 329 | | 90 | 173 | 245 | 17 | 168 | | | Mo | - | 0.08 | 0.26 | 0.09 | | - | - | 0.04 | | 0.10 | - | 1.6 | 0.28 | | - | - | - | - | 0.11 | | | Ag | 0.13 | - | 0.53 | 0.15 | | 0.03 | 0.10 | 0.18 | | 0.03 | - | - | 0.02 | | 0.10 | - | 0.57 | 0.12 | 0.11 | | | Cd | - | 0.37 | 0.67 | 0.20 | | 0.07 | - | 0.14 | | 0.10 | 0.09 | 0.10 | 0.03 | | 0.09 | - | 0.37 | 0.20 | 0.06 | | | In | 1.2 | 1.4 | 1.6 | 1.1 | | 1.2 | 1.1 | 1.4 | | 2.0 | 2.0 | 2.3 | 1.8 | | 1.7 | 1.6 | 0.67 | 1.2 | 1.3 | | | Sn | 235 | 254 | 289 | 214 | | 210 | 218 | 237 | | 233 | 253 | 320 | 244 | | 236 | 204 | 85 | 259 | 200 | | | Sb | 0.15 | - | 0.60 | 0.26 | | - | 0.06 | 0.10 | | - | - | - | 0.08 | | - | 0.21 | 0.32 | - | 0.09 | | | Ba | 78 | 66 | 96 | 78 | | 65 | 61 | 49 | | 6.1 | 3.4 | 0.91 | 4.8 | | 5.1 | 7.2 | 3.4 | 2.1 | 7.4 | | | Hf | 0.04 | 0.08 | 0.13 | 0.08 | | 0.06 | 0.13 | 0.09 | | 0.14 | 0.12 | 0.15 | 0.12 | | 0.13 | 0.15 | 0.17 | - | 0.15 | | | Ta | 27 | 33 | 91 | 41 | | 39 | 69 | 70 | | 48 | 53 | 37 | 50 | | 19 | 38 | 19 | 1.1 | 41 | | | W | 233 | 231 | 276 | 183 | | 143 | 222 | 221 | | 181 | 209 | 136 | 183 | | 100 | 138 | 18 | 16 | 90 | | | Au | 0.11 | 0.26 | 0.44 | 0.21 | | 0.22 | 0.40 | 0.34 | | 0.29 | 0.33 | 0.14 | 0.25 | | 0.03 | 0.22 | 0.18 | 0.02 | 0.21 | | | Tl | 8.6 | 11 | 13 | 10 | | 11 | 11 | 11 | | 8.2 | 8.3 | 8.4 | 8.3 | | 7.6 | 8.0 | 15 | 7.0 | 9.6 | | | Pb | 3.3 | 3.5 | 4.4 | 3.0 | | 1.5 | 2.1 | 2.5 | | 3.4 | 3.3 | 3.3 | 3.1 | | 4.0 | 3.1 | 4.2 | 6.1 | 4.4 | | | Th | 0.00 | - | 0.04 | 0.01 | | 0.04 | 0.03 | 0.01 | | 0.00 | - | 0.01 | 0.01 | | - | - | - | 0.00 | 0.15 | | | U | - | 0.01 | 0.03 | 0.01 | | 0.03 | 0.01 | 0.01 | | 0.01 | - | 0.01 | 0.01 | | 0.01 | 0.02 | - | 0.01 | 0.24 | | |
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