北祁连西段熬油沟组玄武岩地球化学特征及构造意义
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刘懿馨, 侯克选, 沙鑫, 马蓁, 王金荣
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Geochemical Characteristics and Tectonic Significance of Aoyougou Group Basalts in Western North Qilian
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Yixin Liu, Kexuan Hou, Xin Sha, Zhen Ma, Jinrong Wang
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表1 北祁连西段熬油沟组玄武岩主微量元素(%)、微量元素(×10-6)分析结果 |
Table 1 The contents of major (%) and trace elements (×10-6)of Aoyougou Group Basalts in the Western North Qilian |
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样号 | 14-KW-H30 | 14-KW-H31 | 14-KW-H32 | 14-KW-H33 | 14-KW-H34 | 14-KW-H35 | 14-KW-H36 | SiO2 | 44.86 | 44.56 | 45.64 | 45.56 | 48.07 | 46.78 | 46.64 | Al2O3 | 15.64 | 16.15 | 15.72 | 15.16 | 15.47 | 15.71 | 15.59 | TiO2 | 2.90 | 2.43 | 2.50 | 2.30 | 1.96 | 2.55 | 2.39 | TFe2O3 | 13.01 | 10.99 | 11.30 | 10.58 | 10.49 | 11.53 | 11.04 | MnO | 0.65 | 0.85 | 0.72 | 0.46 | 0.46 | 0.63 | 0.55 | MgO | 6.71 | 6.35 | 5.68 | 5.99 | 5.37 | 5.80 | 5.75 | CaO | 2.57 | 2.99 | 3.22 | 5.51 | 3.56 | 2.74 | 3.67 | Na2O | 1.91 | 1.08 | 1.72 | 1.61 | 1.60 | 2.07 | 2.57 | K2O | 4.33 | 6.07 | 5.36 | 5.13 | 6.01 | 4.95 | 4.27 | P2O5 | 0.49 | 0.56 | 0.54 | 0.51 | 0.47 | 0.56 | 0.52 | LOI | 6.41 | 7.27 | 7.01 | 6.40 | 6.05 | 6.12 | 6.59 | Total | 99.48 | 99.30 | 99.41 | 99.21 | 99.51 | 99.44 | 99.58 | Mg# | 48 | 51 | 48 | 50 | 48 | 48 | 48 | Ba | 1 280 | 3 810 | 2 380 | 1 790 | 2 040 | 1 890 | 1 290 | Rb | 42.80 | 67.20 | 83.00 | 68.40 | 86.80 | 64.60 | 40.00 | Cs | 2.99 | 3.49 | 3.32 | 2.89 | 3.18 | 3.21 | 2.75 | Th | 3.12 | 3.19 | 3.65 | 3.13 | 3.37 | 3.71 | 3.30 | U | 0.80 | 0.73 | 0.78 | 0.94 | 0.77 | 0.80 | 0.79 | Nb | 43.90 | 36.20 | 36.90 | 42.00 | 36.90 | 37.90 | 39.00 | Ta | 3.55 | 2.75 | 2.78 | 3.02 | 2.86 | 2.88 | 2.98 | Pb | 4.27 | 3.81 | 4.03 | 3.19 | 3.81 | 6.15 | 3.08 | Sr | 211.00 | 275.00 | 312.00 | 307.00 | 250.00 | 257.00 | 236.00 | Zr | 272.00 | 236.00 | 236.00 | 264.00 | 238.00 | 248.00 | 252.00 | Hf | 6.81 | 5.59 | 5.96 | 6.27 | 5.80 | 6.04 | 6.19 | P | 2 140 | 2 446 | 2 358 | 2 227 | 2 052 | 2 446 | 2 271 | Cr | 246.00 | 165.00 | 181.00 | 223.00 | 123.00 | 170.00 | 207.00 | Ni | 134.00 | 96.10 | 93.30 | 107.00 | 54.80 | 94.90 | 91.10 | Co | 50.20 | 39.60 | 38.80 | 37.40 | 28.00 | 45.00 | 34.60 | V | 274.00 | 229.00 | 220.00 | 204.00 | 169.00 | 236.00 | 213.00 | Sc | 24.90 | 20.60 | 21.80 | 15.50 | 16.70 | 24.20 | 20.60 | Ga | 24.00 | 21.20 | 21.20 | 22.30 | 20.70 | 21.50 | 21.30 | La | 27.90 | 29.00 | 36.90 | 35.80 | 33.90 | 36.80 | 31.10 | Ce | 61.60 | 63.80 | 81.20 | 79.40 | 75.90 | 78.20 | 67.20 | Pr | 7.85 | 8.53 | 10.40 | 9.82 | 9.25 | 10.20 | 8.28 | Nd | 31.20 | 35.60 | 42.80 | 40.20 | 37.10 | 41.20 | 32.40 | Sm | 7.43 | 8.24 | 9.15 | 8.69 | 8.47 | 9.40 | 7.46 | Eu | 2.54 | 3.30 | 3.33 | 3.10 | 2.96 | 3.28 | 2.66 | Gd | 7.23 | 7.56 | 8.76 | 8.17 | 7.62 | 8.75 | 7.07 | Tb | 1.18 | 1.19 | 1.38 | 1.29 | 1.23 | 1.45 | 1.11 | Dy | 6.58 | 6.44 | 7.30 | 6.53 | 6.36 | 7.39 | 5.96 | Ho | 1.23 | 1.20 | 1.34 | 1.23 | 1.22 | 1.35 | 1.11 | Er | 3.24 | 3.06 | 3.42 | 3.06 | 3.12 | 3.56 | 2.90 | Tm | 0.46 | 0.42 | 0.47 | 0.43 | 0.44 | 0.48 | 0.42 | Yb | 2.89 | 2.60 | 2.91 | 2.72 | 2.75 | 2.96 | 2.60 | Lu | 0.43 | 0.38 | 0.42 | 0.38 | 0.40 | 0.41 | 0.38 | Y | 30.10 | 27.50 | 31.00 | 26.40 | 25.50 | 31.80 | 24.80 | ∑REEEE | 191.86 | 198.82 | 240.78 | 227.22 | 216.22 | 237.23 | 195.45 | LREE | 138.52 | 148.47 | 183.78 | 177.01 | 167.58 | 179.08 | 149.10 | HREE | 53.34 | 50.35 | 57.00 | 50.21 | 48.64 | 58.15 | 46.35 | LREE/HREE | 2.60 | 2.95 | 3.22 | 3.53 | 3.45 | 3.08 | 3.22 | δEu | 1.02 | 1.12 | 1.06 | 1.05 | 1.05 | 1.04 | 1.05 | δCe | 0.86 | 0.86 | 0.87 | 0.87 | 0.88 | 0.87 | 0.87 | (La/Yb)N | 6.92 | 8.00 | 9.10 | 9.44 | 8.84 | 8.92 | 8.58 | Nb /U | 54.88 | 49.59 | 47.31 | 44.68 | 47.92 | 47.38 | 49.37 |
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