柴北缘夏日达乌铌钽矿区花岗岩地球化学特征及地质意义

魏生云,王建国,郭学忠,邢佳

Geochemical Characteristics and Geological Significance of Granite in Xiaridawu Niobium-Tantalum Mining Area，Northern Margin of Qaidam Basin

Shengyun WEI,Jianguo WANG,Xuezhong GUO,Jia XING

表2 研究区铌钽矿样品微量和稀土元素分析结果

Table 2 Analysis results of trace elements and rare earth elements of niobium-tantalum ore samples in study area

元素 各样品微量和稀土元素含量 DS1-Wu DS2-Wu DS3-Wu DS4-Wu DS5-Wu DS6-Wu DS7-Wu DS8-Wu DS9-Wu DS10-Wu Rb 408.00 448.00 381.00 404.00 416.00 451.00 391.00 368.00 341.00 433.00 Ba 83.90 97.10 205.00 92.30 104.00 108.00 84.60 88.40 73.70 86.20 Th 21.30 19.20 441.00 19.70 29.20 37.50 23.60 45.00 230.00 13.20 U 5.35 6.74 11.10 4.59 4.75 5.01 4.64 3.57 6.62 5.06 Nb 122.00 120.00 144.00 113.00 132.00 133.00 135.00 123.00 125.00 125.00 Ta 7.84 7.57 9.28 7.63 8.63 8.83 8.99 8.18 8.33 8.34 Sr 28.50 28.10 21.30 32.40 36.20 41.90 28.50 21.50 24.10 30.50 Hf 6.64 6.70 7.78 7.03 7.17 7.68 7.30 7.12 6.38 6.49 Zr 152.00 148.00 169.00 147.00 158.00 159.00 152.00 149.00 142.00 148.00 Y 11.40 13.90 14.00 12.80 13.40 13.60 12.40 8.98 12.80 13.50 La 16.50 15.90 15.80 16.70 20.30 21.50 20.90 19.00 13.90 16.90 Ce 20.80 21.00 20.40 21.90 27.70 28.40 29.20 25.00 17.90 22.00 Pr 1.64 1.72 2.21 1.73 2.46 2.43 2.67 2.20 1.79 1.85 Nd 4.48 4.45 6.13 4.48 6.54 5.84 7.02 5.90 5.06 4.61 Sm 0.65 0.68 0.91 0.66 0.96 0.89 1.05 0.80 0.82 0.68 Eu 0.08 0.11 0.15 0.10 0.14 0.13 0.09 0.10 0.11 0.11 Gd 0.62 0.79 0.87 0.75 0.93 0.82 0.88 0.80 0.79 0.88 Tb 0.19 0.21 0.24 0.20 0.23 0.25 0.21 0.10 0.22 0.22 Dy 1.65 2.02 1.90 1.76 1.99 1.88 1.62 1.30 1.69 1.91 Ho 0.43 0.52 0.49 0.48 0.51 0.51 0.45 0.30 0.44 0.47 Er 1.84 2.26 1.88 1.97 2.06 2.11 1.71 1.40 1.77 1.91 Tm 0.40 0.46 0.43 0.45 0.44 0.46 0.36 0.30 0.39 0.41 Yb 3.04 3.64 3.17 3.48 3.37 3.68 2.69 2.30 2.90 3.12 Lu 0.46 0.52 0.47 0.50 0.53 0.53 0.43 0.30 0.45 0.50 ΣREE 52.78 54.28 55.05 55.16 68.16 69.43 69.28 59.24 48.23 55.57 ΣLREE 44.15 43.86 45.60 45.57 58.10 59.19 60.93 52.47 39.58 46.15 ΣHREE 8.63 10.42 9.45 9.59 10.06 10.24 8.35 6.77 8.65 9.42 LREE/HREE 5.12 4.21 4.83 4.75 5.78 5.78 7.30 7.75 4.58 4.90 δEu 0.38 0.46 0.51 0.43 0.45 0.46 0.28 0.32 0.41 0.43 δCe 0.77 0.79 0.73 0.80 0.80 0.79 0.81 0.79 0.74 0.78 （La/Sm）N 15.97 14.71 10.92 15.92 13.30 15.20 12.52 15.28 10.66 15.63 （La/Yb）N 3.66 2.94 3.36 3.24 4.06 3.94 5.24 5.58 3.23 3.65 （Sm/Nd）N 0.45 0.47 0.46 0.45 0.45 0.47 0.46 0.40 0.50 0.45 （Gd/Yb）N 0.16 0.18 0.22 0.17 0.22 0.18 0.26 0.27 0.22 0.23