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4 夏如淡色花岗岩?伟晶岩中代表性石榴子石的主量(wt.%)和微量成分(×10-6)分析结果
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Table 4 Major (wt.%) and trace (×10-6) elements of representative garnets 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 | 36.12 | 36.36 | | 35.84 | 35.89 | 35.66 | 35.83 | | 36.64 | 37.12 | 36.59 | 36.32 | 36.31 | 36.37 | | TiO2 | 0.00 | 0.02 | | 0.14 | 0.13 | 0.18 | 0.15 | | 0.07 | 0.11 | 0.11 | 0.06 | 0.14 | 0.12 | | Al2O3 | 21.25 | 21.24 | | 21.14 | 21.14 | 21.33 | 21.23 | | 21.27 | 20.44 | 21.55 | 21.36 | 21.08 | 21.10 | | FeO | 22.27 | 22.54 | | 24.58 | 24.84 | 22.59 | 19.02 | | 22.70 | 21.52 | 16.91 | 15.64 | 12.43 | 9.53 | | | 1 | 2 | | 3 | 4 | 5 | 6 | | 7 | 8 | 9 | 10 | 11 | 12 | | MnO | 16.82 | 17.05 | | 16.25 | 16.01 | 18.49 | 21.07 | | 17.79 | 20.55 | 23.23 | 24.95 | 28.93 | 31.86 | | MgO | 0.10 | 0.12 | | 0.08 | 0.13 | 0.09 | 0.08 | | 0.05 | 0.04 | 0.04 | 0.03 | - | - | | CaO | 2.49 | 2.32 | | 1.33 | 1.58 | 1.31 | 1.63 | | 1.54 | 0.99 | 1.49 | 1.53 | 1.23 | 1.00 | | Total | 99.05 | 99.65 | | 99.36 | 99.72 | 99.65 | 99.01 | | 100.06 | 100.79 | 99.92 | 99.89 | 100.12 | 99.98 | | 锰铝榴石 | 39.4 | 39.7 | | 38.3 | 37.7 | 43.8 | 49.7 | | 41.1 | 46.8 | 53.7 | 58.1 | 67.3 | 74.0 | | 铁铝榴石 | 52.8 | 53.0 | | 57.4 | 57.1 | 52.0 | 45.2 | | 54.2 | 50.2 | 41.8 | 37.3 | 29.1 | 23.0 | | 钙铝榴石 | 7.5 | 7.0 | | 4.0 | 4.7 | 3.9 | 4.9 | | 4.7 | 2.9 | 4.6 | 4.6 | 3.6 | 3.0 | | 镁铝榴石 | 0.4 | 0.5 | | 0.3 | 0.5 | 0.4 | 0.3 | | 0.2 | 0.2 | 0.2 | 0.1 | 0.0 | 0.0 | | Mn/(Mn+Fe) | 0.43 | 0.43 | | 0.40 | 0.39 | 0.45 | 0.52 | | 0.44 | 0.49 | 0.58 | 0.61 | 0.70 | 0.77 | | LA⁃ICP⁃MS (×10-6) | Li | 172 | 221 | | 304 | 188 | 374 | 344 | | 236 | 328 | 357 | 369 | 135 | 77 | | Be | - | 0.14 | | 0.11 | - | 0.34 | 0.67 | | - | 0.15 | 0.37 | 0.12 | - | - | | B | 8.0 | 7.3 | | 11 | 3.2 | 11 | 13 | | 4.3 | 12 | 8.7 | 14 | 19 | 15 | | Sc | 53 | 51 | | 116 | 119 | 166 | 150 | | 61 | 48 | 142 | 40 | 38 | 22 | | V | 5.9 | 7.8 | | 0.96 | 0.75 | 1.3 | 0.22 | | 0.36 | 0.64 | 1.6 | 1.2 | 0.11 | - | | Cr | 507 | 4.9 | | - | 2.0 | - | 1.4 | | 0.98 | - | 2.3 | 2.5 | - | 2.1 | | Co | 2.4 | 2.3 | | 1.5 | 1.8 | 1.6 | 1.3 | | 0.72 | 0.63 | 0.39 | 0.71 | - | 0.18 | | Ni | - | 0.26 | | 0.32 | 0.11 | 0.10 | 0.21 | | - | 0.38 | 0.23 | 0.13 | - | 0.52 | | Cu | 0.51 | - | | - | 0.01 | 0.65 | 0.06 | | - | 3.2 | - | 3.4 | 1.4 | 0.18 | | Zn | 12 | 10 | | 55 | 56 | 52 | 47 | | 63 | 91 | 97 | 87 | 97 | 81 | | Ga | 15 | 16 | | 32 | 23 | 38 | 38 | | 37 | 42 | 40 | 52 | 37 | 37 | | Ge | 50 | 62 | | 62 | 55 | 62 | 57 | | 64 | 83 | 70 | 89 | 63 | 43 | | Rb | 0.72 | 16 | | 0.21 | 0.27 | 0.50 | 0.28 | | - | 0.43 | 0.25 | 0.14 | 0.07 | - | | Sr | 0.28 | 0.47 | | 0.13 | 0.25 | 0.36 | 0.20 | | 0.01 | 0.06 | 0.19 | 0.16 | 0.01 | - | | Y | 1801 | 2161 | | 2920 | 1678 | 3916 | 3612 | | 2326 | 3224 | 3618 | 4393 | 1109 | 556 | | Zr | 0.49 | 0.27 | | 3.3 | 1.8 | 7.7 | 8.5 | | 6.5 | 8.2 | 14 | 25 | 28 | 22 | | Nb | 0.04 | 1.5 | | 0.42 | 0.48 | 9.4 | 15 | | 1.5 | 7.6 | 4.4 | 21 | 52 | 69 | | Mo | 2.1 | 1.4 | | 1.9 | 1.7 | 1.2 | 2.0 | | 2.0 | 1.6 | 3.0 | 2.6 | 3.1 | 2.6 | | Ag | - | - | | 0.20 | - | - | 0.17 | | 0.15 | 0.34 | 0.20 | 0.06 | 0.34 | 0.02 | | Cd | 1.7 | 2.3 | | 5.0 | 4.7 | 5.6 | 5.5 | | 5.3 | 5.9 | 6.2 | 7.1 | 10 | 9.1 | | In | 0.03 | 0.05 | | 0.13 | 0.05 | 0.24 | 0.17 | | 0.38 | 0.34 | 0.31 | 0.56 | 0.25 | 0.36 | | Sn | 2.2 | 1.5 | | 17 | 9.2 | 42 | 50 | | 79 | 75 | 62 | 129 | 38 | 34 | | Sb | - | 1.7 | | 0.07 | 0.08 | - | 0.08 | | - | 0.40 | 0.10 | - | - | - | | Cs | 1.4 | 1.4 | | 0.02 | 0.87 | - | 0.04 | | 0.03 | - | - | - | 0.00 | 0.00 | | Ba | 0.06 | 0.33 | | - | - | - | - | | - | - | - | - | - | - | | Hf | 0.07 | 0.12 | | 0.32 | 0.19 | 0.60 | 0.94 | | 0.60 | 0.82 | 0.95 | 2.2 | 1.9 | 1.7 | | Ta | 0.11 | 0.55 | | 0.96 | 0.39 | 3.5 | 4.5 | | 2.2 | 11 | 3.3 | 24 | 14 | 15 | | W | 0.59 | 14 | | 0.46 | 0.36 | 0.73 | 0.38 | | 0.06 | 0.13 | 0.36 | 0.40 | 0.24 | 0.38 | | Au | - | - | | - | - | 0.03 | 0.02 | | - | 0.04 | - | 0.11 | 0.06 | 0.05 | | Tl | 0.10 | 0.16 | | 0.00 | 0.01 | 0.00 | - | | - | - | - | - | 0.01 | - | | Bi | - | 0.20 | | 0.00 | 0.02 | - | - | | 0.00 | - | - | 0.02 | - | 0.01 | | Pb | 0.09 | - | | 0.07 | 0.05 | - | - | | 0.06 | - | 0.00 | - | 0.05 | 0.03 | | Th | 0.02 | 0.06 | | 0.03 | - | - | - | | - | - | - | - | 0.02 | 0.00 | | U | 0.02 | 0.12 | | 0.07 | 0.06 | 0.22 | 0.33 | | 0.09 | 0.21 | 0.26 | 0.94 | 1.8 | 2.0 | | La | 0.09 | 0.01 | | - | - | - | - | | 0.01 | - | - | - | - | 0.01 | | Ce | 0.27 | 0.01 | | - | 0.02 | 0.03 | 0.04 | | 0.03 | 0.02 | 0.04 | 0.04 | 0.07 | 0.13 | | Pr | 0.04 | 0.00 | | - | 0.01 | 0.03 | 0.03 | | 0.03 | 0.01 | 0.06 | 0.07 | 0.07 | 0.11 | | Nd | 0.41 | 0.04 | | 0.19 | 0.06 | 0.69 | 0.99 | | 0.71 | 0.72 | 1.1 | 1.2 | 1.5 | 2.4 | | Sm | 0.66 | 0.60 | | 4.3 | 2.3 | 9.1 | 10 | | 8.4 | 8.2 | 13 | 16 | 15 | 21 | | Eu | 0.10 | 0.06 | | 0.05 | 0.01 | 0.09 | 0.07 | | 0.07 | 0.05 | 0.06 | 0.01 | 0.04 | 0.05 | | | 1 | 2 | | 3 | 4 | 5 | 6 | | 7 | 8 | 9 | 10 | 11 | 12 | | Gd | 7.3 | 7.0 | | 44 | 22 | 75 | 84 | | 70 | 94 | 85 | 119 | 85 | 74 | | Tb | 5.6 | 7.2 | | 30 | 16 | 43 | 46 | | 38 | 54 | 47 | 70 | 34 | 22 | | Dy | 122 | 157 | | 355 | 197 | 495 | 492 | | 344 | 464 | 482 | 638 | 213 | 110 | | Ho | 59 | 82 | | 86 | 54 | 126 | 111 | | 60 | 77 | 104 | 111 | 22 | 11 | | Er | 342 | 477 | | 302 | 216 | 474 | 368 | | 161 | 199 | 318 | 289 | 39 | 19 | | Tm | 94 | 132 | | 58 | 48 | 102 | 72 | | 30 | 34 | 59 | 52 | 5.4 | 2.8 | | Yb | 970 | 1391 | | 479 | 469 | 975 | 616 | | 218 | 266 | 487 | 400 | 33 | 19 | | Lu | 148 | 251 | | 63 | 70 | 142 | 81 | | 24 | 32 | 61 | 46 | 2.7 | 1.9 | | LREE | 1.6 | 0.72 | | 4.5 | 2.4 | 10.0 | 11 | | 9.3 | 9.0 | 14 | 17 | 16 | 24 | | HREE | 1748 | 2504 | | 1417 | 1093 | 2433 | 1871 | | 947 | 1220 | 1644 | 1726 | 434 | 260 | | ΣREE | 1749 | 2505 | | 1422 | 1095 | 2443 | 1882 | | 956 | 1229 | 1658 | 1743 | 451 | 284 | | δEu | 0.14 | 0.08 | | 0.01 | 0.01 | 0.01 | 0.01 | | 0.66 | 0.71 | 1.33 | 0.89 | 3.66 | 4.51 | | k(HREE) | 0.31 | 0.34 | | 0.13 | 0.18 | 0.15 | 0.11 | | 0.04 | 0.03 | 0.09 | 0.04 | -0.11 | -0.12 | |
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