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    西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学

    张志 陈毓川 唐菊兴 李壮 宋俊龙 杨毅 胡正华 杨欢欢 杨超 康浩然

    张志, 陈毓川, 唐菊兴, 李壮, 宋俊龙, 杨毅, 胡正华, 杨欢欢, 杨超, 康浩然, 2015. 西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学. 地球科学, 40(1): 77-97. doi: 10.3799/dqkx.2015.006
    引用本文: 张志, 陈毓川, 唐菊兴, 李壮, 宋俊龙, 杨毅, 胡正华, 杨欢欢, 杨超, 康浩然, 2015. 西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学. 地球科学, 40(1): 77-97. doi: 10.3799/dqkx.2015.006
    Zhang Zhi, Chen Yuchuan, Tang Juxing, Li Zhuang, Song Junlong, Yang Yi, Hu Zhenghua, Yang Huanhuan, Yang Chao, Kang Haoran, 2015. Zircon U-Pb Age and Geochemical Characteristics of Volcanic Rocks in Gaerqiong-Galale Cu-Au Ore District, Tibet. Earth Science, 40(1): 77-97. doi: 10.3799/dqkx.2015.006
    Citation: Zhang Zhi, Chen Yuchuan, Tang Juxing, Li Zhuang, Song Junlong, Yang Yi, Hu Zhenghua, Yang Huanhuan, Yang Chao, Kang Haoran, 2015. Zircon U-Pb Age and Geochemical Characteristics of Volcanic Rocks in Gaerqiong-Galale Cu-Au Ore District, Tibet. Earth Science, 40(1): 77-97. doi: 10.3799/dqkx.2015.006

    西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学

    doi: 10.3799/dqkx.2015.006
    基金项目: 

    国土资源部公益性行业科研专项项目 201011013-3

    国家"973"项目 2011CB403103

    国家自然科学基金项目 41172077

    青藏专项优选项目 12120113037400

    详细信息
      作者简介:

      张志(1985-), 男, 博士研究生, 主要从事青藏高原地质矿产研究.E-mail: tancer@qq.com

      通讯作者:

      唐菊兴, E-mail: tangjuxing@126.com

    • 中图分类号: P581

    Zircon U-Pb Age and Geochemical Characteristics of Volcanic Rocks in Gaerqiong-Galale Cu-Au Ore District, Tibet

    • 摘要: 尕尔穷-嘎拉勒铜金矿集区是班-怒结合带南部的重要矿集区.矿集区内发育大面积火山岩, 利用锆石U-Pb年代学方法, 首次精确测定了研究区内不同地层中火山岩年龄, 并结合其岩石地球化学特征探讨了其形成构造背景.研究表明, 区内朗久组火山角砾岩成岩年龄为141.7.0±0.47 Ma(MSWD=0.43), 多爱组流纹岩年龄为136.80±0.48 Ma(MSWD=0.79), 形成时代为早白垩世初期, 属于班公湖-怒江洋南向俯冲的岩浆作用响应; 原定多爱组火山角砾岩(GE火山角砾岩)年龄为85.20±0.53 Ma(MSWD=3.40), 形成时代为晚白垩世, 不属于早白垩世多爱组产物, 属于洋盆消亡后羌塘陆块与冈底斯陆块汇聚阶段的火山作用产物, 晚于尕尔穷铜金矿的成矿年龄(86.87±0.50 Ma).岩石地球化学特征表明, 区内火山岩均具有相对富集Rb、Th、U等大离子亲石元素(LILE), 而亏损Ta、Nb、Yb、Ti等高场强元素(HFSE)的特征, 显示出弧火山岩特性.结合区域已有火山岩研究资料表明, 在班公湖-怒江洋南向俯冲过程中, 从早白垩世初至中晚期均有比较连续的火山作用, 持续时间约为30 Ma(140~110 Ma); 在班公湖-怒江洋盆消亡后的羌塘陆块与冈底斯陆块汇聚晚阶段, 又伴随有晚白垩世火山作用的发生, 该期火山作用与区内成矿岩体年龄相当, 可能为同一岩浆系统的产物. 关键字: 火山岩; 班公湖-怒江特提斯洋; 俯冲; 碰撞; 尕尔穷-嘎拉勒矿集区; 地球化学.

       

    • 图  1  尕尔穷-嘎拉勒矿集区地质简图

      唐菊兴等,2013修改

      Fig.  1.  Generalized geological map of the Gerqiong-Glale Cu-Au ore field

      图  2  尕尔穷-嘎拉勒矿集区火山岩照片

      a.朗久组火山角砾岩;b.多爱组凝灰岩;c.GE火山角砾岩;d.多爱组流纹岩

      Fig.  2.  The Photos of volcanic rocks in Gaerqiong-Galale ore district

      图  3  尕尔穷-嘎拉勒矿集区火山岩锆石CL图像及锆石年龄谐和图

      Fig.  3.  CL image and concordia diagram of U-Pb data for zircons of volcanic rocks in Gaerqiong-Galale ore district

      图  4  尕尔穷-嘎拉勒矿集区火山岩TAS(a)、SiO2-K2O(b)、Yb+Ta-Rb(c)和La/Yb-Ba/La(d)图解

      图d底图据朱弟成等(2006)

      Fig.  4.  TAS (a)、SiO2 vs. K2O (b)、Yb+Ta vs. Rb (c)、La/Yb vs. Ba/La (d) diagrams of volcanic rocks in Gaerqiong-Galale ore district

      图  5  尕尔穷-嘎拉勒矿集区火山岩HarKer图解

      Fig.  5.  Harker diagram of volcanic rocks in Gaerqiong-Galale ore district

      图  6  尕尔穷-嘎拉勒矿集区火山岩微量元素标准化蛛网图(a)及稀土元素球粒陨石标准化配分图(b)

      Fig.  6.  Primitive mantle normalized trace element spider diagram (a) and Chondrit-normalized REE-patterns (b) for volcanic rocks in Gaerqiong-Galale ore district

      表  1  尕尔穷-嘎拉勒矿集区朗久组火山角砾岩LA-ICP-MS锆石U-Pb同位素测年结果

      Table  1.   Zircons U-Pb data of the Langjiu group volcanic breccias in Gaerqiong-Galale ore district

      测点号 元素含量(10-6) Th/U 同位素比值 表面年龄(Ma)
      Pb U Tu 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ
      1 4.34 188.55 125.90 0.67 0.049 9 0.002 2 0.152 7 0.006 9 0.022 2 0.000 1 191.84 101.50 144.27 6.54 141.39 0.87
      2 1.61 66.81 59.29 0.89 0.048 5 0.004 2 0.149 5 0.012 8 0.022 3 0.000 2 125.17 202.68 141.47 12.15 142.44 1.31
      3 9.29 360.88 344.95 0.96 0.049 1 0.001 3 0.150 9 0.003 9 0.022 3 0.000 1 151.72 61.20 142.69 3.69 142.14 0.94
      4 6.64 261.36 295.70 1.13 0.048 9 0.002 2 0.148 9 0.006 8 0.022 1 0.000 1 143.59 104.70 140.94 6.40 140.78 0.85
      5 28.96 965.95 1 817.90 1.88 0.048 7 0.000 4 0.149 8 0.001 4 0.022 3 0.000 1 133.99 18.38 141.77 1.33 142.23 0.92
      6 8.96 370.09 289.90 0.78 0.049 1 0.001 2 0.150 2 0.003 7 0.022 2 0.000 1 150.74 57.92 142.12 3.52 141.60 0.86
      7 4.67 190.09 156.45 0.82 0.049 5 0.002 0 0.151 4 0.006 2 0.022 2 0.000 1 169.78 95.71 143.18 5.88 141.58 0.90
      8 5.57 234.62 166.34 0.71 0.048 9 0.001 6 0.149 3 0.004 9 0.022 1 0.000 1 144.27 77.47 141.27 4.68 141.09 0.84
      9 8.34 331.49 299.56 0.90 0.049 2 0.001 6 0.151 0 0.004 9 0.022 2 0.000 1 159.41 74.68 142.79 4.63 141.79 0.81
      10 3.70 146.37 136.50 0.93 0.048 7 0.002 6 0.149 8 0.009 0 0.022 3 0.000 1 131.74 127.31 141.74 8.54 142.34 0.95
      11 6.41 251.87 279.12 1.11 0.049 2 0.002 0 0.149 9 0.006 2 0.022 1 0.000 1 157.12 96.51 141.82 5.85 140.90 0.86
      12 3.88 158.51 120.75 0.76 0.048 7 0.001 8 0.150 3 0.005 5 0.022 4 0.000 1 133.77 86.41 142.19 5.22 142.69 0.84
      13 10.58 385.37 542.74 1.41 0.048 9 0.001 9 0.149 6 0.008 3 0.022 2 0.000 1 143.33 93.29 141.60 7.86 141.49 0.95
      14 5.03 171.36 304.90 1.78 0.049 2 0.002 8 0.150 5 0.008 6 0.022 2 0.000 1 157.42 130.87 142.34 8.17 141.44 0.91
      下载: 导出CSV

      表  2  尕尔穷-嘎拉勒矿集区GE火山角砾岩LA-ICP-MS锆石U-Pb测年结果

      Table  2.   Zircons U-Pb data of the Duoai group volcanic breccias in Gaerqiong-Galale ore district

      测点号 元素含量(10-6) Th/U 同位素比值 表面年龄(Ma)
      Pb U Tu 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ
      1 10.84 720.49 702.24 0.97 0.048 3 0.001 6 0.088 8 0.002 8 0.013 3 0.000 1 114.09 77.34 86.35 2.72 85.35 0.52
      2 7.43 463.57 635.91 1.37 0.047 8 0.001 5 0.088 2 0.002 8 0.013 4 0.000 1 90.66 74.74 85.84 2.69 85.67 0.52
      3 8.50 507.48 802.55 1.58 0.048 9 0.001 8 0.089 9 0.003 8 0.013 3 0.000 1 143.46 86.47 87.45 3.73 85.41 0.53
      4 9.25 534.29 987.51 1.85 0.047 9 0.001 2 0.087 6 0.002 2 0.013 3 0.000 1 95.08 59.49 85.23 2.19 84.88 0.50
      5 4.64 270.93 503.85 1.86 0.047 5 0.002 1 0.086 2 0.003 9 0.013 1 0.000 1 76.70 105.38 83.92 3.79 84.18 0.54
      6 6.79 383.34 769.37 2.01 0.047 7 0.001 8 0.086 9 0.003 3 0.013 2 0.000 1 82.33 88.27 84.63 3.19 84.71 0.53
      7 8.49 496.48 822.28 1.66 0.048 1 0.001 3 0.088 6 0.002 4 0.013 4 0.000 1 102.66 63.81 86.20 2.37 85.61 0.50
      8 12.78 788.11 1 125.61 1.43 0.048 5 0.001 0 0.088 1 0.001 8 0.013 2 0.000 1 122.66 46.28 85.71 1.71 84.39 0.49
      9 6.18 399.04 440.00 1.10 0.048 8 0.001 5 0.089 7 0.002 8 0.013 3 0.000 1 138.38 70.48 87.19 2.70 85.34 0.53
      10 7.42 452.13 672.36 1.49 0.048 6 0.001 3 0.088 0 0.002 4 0.013 1 0.000 1 129.40 62.49 85.64 2.32 84.08 0.50
      11 6.08 368.33 487.05 1.32 0.046 8 0.001 8 0.086 8 0.003 3 0.013 5 0.000 1 37.04 91.90 84.49 3.26 86.18 0.58
      12 12.33 739.63 1 120.10 1.51 0.049 5 0.001 0 0.090 8 0.001 9 0.013 3 0.000 1 170.17 44.92 88.21 1.82 85.21 0.52
      13 7.39 462.43 639.68 1.38 0.049 0 0.001 7 0.088 7 0.003 1 0.013 1 0.000 1 149.29 80.73 86.28 2.97 84.02 0.52
      14 7.27 430.22 618.90 1.44 0.048 5 0.001 5 0.091 6 0.002 8 0.013 7 0.000 1 122.51 71.75 88.98 2.76 87.74 0.53
      15 13.64 857.56 1 059.60 1.24 0.048 1 0.000 7 0.089 0 0.001 4 0.013 4 0.000 1 103.57 35.90 86.57 1.36 85.96 0.51
      下载: 导出CSV

      表  3  尕尔穷-嘎拉勒矿集区多爱组流纹岩LA-ICP-MS锆石U-Pb同位素测年

      Table  3.   Zircons U-Pb data of the Duoai group rhyolite in Gaerqiong-Galale ore district

      测点号 元素含量(10-6) Th/U 同位素比值 表面年龄(Ma)
      Pb U Tu 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ
      1 2.00 82.99 60.18 0.73 0.048 9 0.003 6 0.146 0 0.010 7 0.021 7 0.000 2 140.98 171.14 138.39 10.15 138.24 1.11
      2 2.64 112.21 70.50 0.63 0.048 5 0.003 9 0.144 2 0.011 7 0.021 6 0.000 2 121.32 188.99 136.76 11.06 137.65 1.06
      3 10.51 461.55 293.82 0.64 0.049 0 0.002 1 0.143 7 0.006 2 0.021 3 0.000 1 146.80 102.77 136.36 5.90 135.76 0.81
      4 2.80 110.62 114.95 1.04 0.049 2 0.004 1 0.144 7 0.012 0 0.021 3 0.000 2 156.91 194.36 137.21 11.40 136.07 1.07
      5 8.10 354.85 190.97 0.54 0.048 6 0.001 0 0.143 8 0.003 1 0.021 5 0.000 1 128.02 49.54 136.42 2.90 136.90 0.89
      6 2.36 103.22 55.87 0.54 0.049 3 0.003 6 0.145 7 0.010 9 0.021 5 0.000 1 159.99 173.02 138.09 10.29 136.82 0.94
      7 9.18 400.03 212.78 0.53 0.048 9 0.000 9 0.145 0 0.002 7 0.021 5 0.000 1 141.79 41.58 137.48 2.54 137.24 0.79
      8 6.39 260.55 221.41 0.85 0.048 6 0.001 9 0.143 7 0.005 6 0.021 4 0.000 1 129.61 90.72 136.36 5.31 136.8 0.85
      9 2.53 95.59 99.99 1.05 0.049 1 0.003 8 0.144 0 0.011 4 0.021 3 0.000 2 152.05 182.86 136.62 10.81 135.73 1.14
      10 3.50 151.53 79.57 0.53 0.049 1 0.003 6 0.143 8 0.010 6 0.021 2 0.000 2 151.86 171.09 136.42 10.05 135.53 0.97
      11 8.90 378.02 227.20 0.60 0.048 3 0.001 4 0.142 9 0.004 0 0.021 4 0.000 1 115.20 66.43 135.63 3.76 136.80 0.83
      12 6.83 300.99 131.64 0.44 0.048 8 0.001 9 0.145 5 0.005 7 0.021 6 0.000 1 137.55 89.50 137.94 5.38 137.96 0.85
      13 5.97 248.47 204.18 0.82 0.049 1 0.002 1 0.145 1 0.006 2 0.021 4 0.000 1 153.05 101.56 137.57 5.92 136.67 0.91
      14 3.59 148.34 126.59 0.85 0.048 7 0.004 8 0.142 5 0.013 8 0.021 2 0.000 2 134.69 229.12 135.28 13.09 135.31 1.17
      15 3.43 144.59 125.98 0.87 0.049 4 0.004 4 0.146 7 0.013 2 0.021 5 0.000 2 168.72 210.07 139.03 12.50 137.30 1.04
      下载: 导出CSV

      表  4  尕尔穷-嘎拉勒矿集区火山岩主量元素(10-2)分析结果

      Table  4.   Major element (10-2) composition of volcanic rocks in Gaerqiong-Galale ore district

      原样编号 多爱组凝灰岩 朗久组凝灰岩 多爱组流纹岩 朗久组火山角砾岩 GE火山角砾岩
      NGB01 NGB02 XGB01 XGB02 HGB01 HGB02 HGB03 EGB01 EGB02 JGB01 JGB02 JGB03
      SiO2 58.71 58.71 54.03 57.64 81.78 81.61 78.98 66.21 66.15 68.48 71.58 70.36
      Al2O3 19.24 19.09 17.83 16.08 6.39 6.78 6.28 15.23 14.74 12.92 10.78 11.47
      Fe2O3 0.092 0.049 2.00 3.25 0.26 0.052 0.16 0.73 0.84 2.24 1.65 1.85
      FeO 3.76 3.71 4.60 3.68 0.61 0.51 0.61 2.30 1.89 1.94 2.66 2.07
      MgO 2.24 2.24 4.18 3.39 0.32 0.50 0.44 1.74 1.38 0.91 0.52 0.49
      CaO 5.85 5.82 5.89 5.73 3.74 4.04 5.75 3.06 3.89 3.35 4.63 4.69
      Na2O 1.08 1.09 4.61 3.31 1.09 1.12 0.97 3.41 3.45 2.34 2.31 1.99
      K2O 6.07 5.97 3.36 2.95 3.29 3.01 2.98 1.81 1.72 4.77 3.73 4.79
      TiO2 0.62 0.61 0.87 0.76 0.10 0.11 0.10 0.49 0.40 0.41 0.22 0.25
      MnO 0.027 0.022 0.14 0.092 0.033 0.029 0.045 0.057 0.066 0.073 0.15 0.12
      P2O5 0.045 0.045 0.34 0.28 0.018 0.020 0.017 0.17 0.14 0.091 0.066 0.069
      LOSS 1.72 1.97 1.49 2.21 2.24 2.03 3.03 4.63 5.21 2.06 1.31 1.25
      Mg# 51.70 52.10 62.00 62.40 48.40 63.80 56.30 57.60 56.80 45.70 26.00 29.90
      总计 99.50 99.30 99.30 99.40 99.90 99.80 99.40 99.80 99.90 99.60 99.60 99.40
      石英(Q) 10.90 11.50 0.00 10.60 58.80 58.50 55.90 30.90 30.00 29.50 35.50 32.60
      钙长石(An) 29.50 29.50 18.40 20.90 2.88 4.71 4.14 14.90 19.60 10.90 8.18 8.39
      钠长石(Ab) 9.37 9.43 37.90 28.80 9.48 9.66 8.48 30.30 30.90 20.30 19.90 17.10
      正长石(Or) 36.70 36.20 20.30 17.90 19.90 18.20 18.30 11.20 10.80 28.90 22.40 28.80
      霞石(Ne) 0.00 0.00 1.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
      刚玉(C) 0.32 0.34 0.00 0.00 0.00 0.00 0.00 2.58 0.43 0.00 0.00 0.00
      透辉石(Di) 0.00 0.00 7.72 5.45 3.32 4.23 4.24 0.00 0.00 4.69 9.41 6.68
      紫苏辉石(Hy) 11.70 11.70 0.00 9.50 0.00 0.00 0.00 7.61 6.00 1.49 0.00 0.00
      硅灰石(Wo) 0.00 0.00 0.00 0.00 5.05 4.41 8.48 0.00 0.00 0.00 1.63 2.99
      橄榄石(Ol) 0.00 0.00 9.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
      钛铁矿(Il) 1.21 1.19 1.68 1.48 0.19 0.21 0.20 0.99 0.81 0.79 0.42 0.48
      磁铁矿(Mt) 0.14 0.07 2.97 4.64 0.38 0.08 0.24 1.11 1.28 3.19 2.44 2.73
      磷灰石(Ap) 0.11 0.11 0.80 0.68 0.04 0.05 0.04 0.41 0.35 0.22 0.15 0.16
      锆石(Zr) 0.05 0.05 0.04 0.03 0.01 0.01 0.01 0.03 0.02 0.03 0.02 0.02
      铬铁矿(Cm) 0.01 0.01 0.00 0.01 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00
      合计 100.04 100.03 99.99 100.02 100.00 100.01 100.02 100.03 100.02 100.03 100.02 100.03
      分异指数(DI) 57.00 57.10 59.20 57.40 88.10 86.30 82.70 72.40 71.60 78.70 77.80 78.60
      A/CNK 1.01 1.01 0.81 0.84 0.53 0.55 0.41 1.16 1.01 0.86 0.66 0.68
      固结指数(SI) 16.90 17.20 22.30 20.50 5.74 9.64 8.52 17.40 14.90 7.47 4.78 4.38
      注:Mg#=100×Mg(Mg+Fe2+).
      下载: 导出CSV

      表  5  尕尔穷-嘎拉勒矿集区火山岩微量元素(10-6)分析结果

      Table  5.   Trace element (10-6) composition of volcanic rocks in Gaerqiong-Galale ore district

      编号 多爱组凝灰岩 朗久组凝灰岩 多爱组流纹岩 朗久组火山角砾岩 GE火山角砾岩
      NGB01 NGB02 XGB01 XGB02 HGB01 HGB02 HGB03 EGB01 EGB02 JGB01 JGB02 JGB03
      As 2.44 2.10 4.24 13.90 67.60 34.90 69.50 5.11 8.18 7.02 9.90 5.53
      Ba 357.00 329.00 471.00 578.00 267.00 227.00 258.00 337.00 245.00 774.00 475.00 653.00
      Co 9.34 8.86 22.40 13.30 1.37 1.87 1.69 8.89 7.94 6.01 3.06 4.02
      Cr 33.50 34.40 15.80 26.70 6.18 5.94 5.97 34.60 31.50 6.57 9.41 6.65
      Cs 34.00 36.40 6.52 5.26 3.34 4.76 4.02 5.33 15.10 18.60 19.3 6.26
      Cu 26.20 14.50 25.80 9.26 12.60 4.78 4.36 5.06 21.80 51.20 23.10 34.50
      Ga 22.50 25.60 19.10 20.00 5.40 5.61 5.47 16.50 17.00 13.60 11.40 11.10
      Hf 8.22 8.21 4.95 4.13 1.46 1.81 1.56 3.90 3.23 4.60 3.53 3.44
      Nb 15.20 16.90 15.20 12.60 3.81 3.12 3.58 14.30 6.49 10.30 10.40 10.10
      Ni 18.70 17.40 13.90 9.03 4.26 5.11 3.97 24.70 22.10 3.32 3.71 2.15
      Pb 78.30 94.40 7.23 11.10 19.30 29.30 28.90 14.30 6.58 24.30 17.80 18.50
      Rb 382.00 369.00 175.00 134.00 182.00 171.00 158.00 95.00 101.00 189.00 168.00 201.00
      Sb 1.06 1.04 0.80 0.66 0.88 1.58 1.47 0.66 0.50 1.39 0.91 0.70
      Sc 16.50 15.60 13.70 16.60 1.91 1.99 1.89 6.22 5.67 7.32 5.78 5.58
      Sr 174.00 172.00 727.00 561.00 158.00 162.00 131.00 275.00 333.00 327.00 229.00 283.00
      Ta 1.40 1.48 0.96 0.86 0.39 0.17 0.27 1.09 0.62 0.86 0.99 0.95
      Th 21.50 24.10 7.87 9.21 5.36 5.93 5.10 8.32 6.54 14.40 17.70 17.60
      U 2.06 2.32 1.70 1.80 1.19 1.14 1.16 2.05 1.48 2.55 2.31 2.35
      V 61.40 58.80 145.00 133.00 10.10 9.29 9.80 55.20 47.00 44.30 21.40 25.30
      Zn 51.80 44.10 115.00 65.60 19.60 20.30 23.00 45.00 70.20 47.60 34.60 55.90
      Zr 272.00 271.00 185.00 153.00 47.60 59.20 49.50 139.00 117.00 156.00 113.00 109.00
      Ce 115.00 111.00 58.70 68.60 25.00 21.80 35.70 48.50 47.60 85.60 67.30 81.10
      Dy 7.70 7.21 4.20 4.81 1.44 1.36 2.23 1.83 1.70 3.78 4.00 3.62
      Er 4.72 4.37 2.43 2.74 0.95 0.92 1.35 1.05 0.96 2.29 2.47 2.23
      Eu 1.91 1.71 1.68 1.89 0.40 0.37 0.58 0.90 0.86 1.23 0.93 0.95
      Gd 8.79 7.99 5.25 6.00 1.61 1.44 2.32 2.70 2.70 5.43 4.83 4.85
      Ho 1.59 1.48 0.85 0.98 0.31 0.30 0.48 0.36 0.35 0.77 0.83 0.76
      La 52.60 50.00 30.50 33.00 12.30 10.60 13.30 28.50 24.30 50.90 39.70 45.00
      Lu 0.70 0.68 0.34 0.36 0.16 0.17 0.19 0.15 0.13 0.35 0.37 0.33
      Nd 48.80 44.50 28.00 33.00 8.95 7.71 12.10 18.00 18.30 37.00 30.60 32.10
      Pr 11.90 10.90 6.69 7.71 2.34 1.93 3.00 4.76 4.68 9.69 7.92 8.57
      Sm 9.53 8.52 5.35 6.54 1.66 1.38 2.48 2.82 3.04 6.05 5.26 5.21
      Tb 1.33 1.23 0.76 0.88 0.25 0.23 0.38 0.35 0.35 0.72 0.72 0.65
      Tm 0.68 0.65 0.34 0.37 0.15 0.15 0.19 0.15 0.13 0.33 0.37 0.32
      Y 36.20 35.50 23.90 22.90 9.73 9.30 11.20 10.90 9.58 19.40 21.60 18.70
      Yb 4.65 4.42 2.20 2.43 1.04 1.04 1.25 0.98 0.85 2.20 2.51 2.13
      ΣREE 270.00 254.00 147.00 169.00 56.60 49.30 75.50 111.00 106.00 206.00 168.00 188.00
      LREE 240.00 226.00 131.00 151.00 50.70 43.70 67.10 104.00 98.70 190.00 152.00 173.00
      HREE 30.20 28.00 16.30 18.60 5.92 5.59 8.39 7.58 7.15 15.90 16.10 14.90
      LREE/HREE 7.94 8.08 8.01 8.11 8.56 7.82 8.00 13.70 13.80 12.00 9.41 11.60
      LaN/YbN 8.12 8.11 9.95 9.72 8.51 7.29 7.59 20.90 20.60 16.60 11.40 15.20
      δEu 0.64 0.63 0.97 0.92 0.75 0.81 0.73 1.00 0.92 0.66 0.56 0.58
      δCe 1.12 1.17 1.01 1.06 1.14 1.18 1.39 1.02 1.09 0.95 0.93 1.01
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