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    大宝山多金属矿区土壤-植被稀土元素生物地球化学特征

    王娟 王正海 耿欣 何凤萍 祖玉川 王磊

    王娟, 王正海, 耿欣, 何凤萍, 祖玉川, 王磊, 2014. 大宝山多金属矿区土壤-植被稀土元素生物地球化学特征. 地球科学, 39(6): 733-740. doi: 10.3799/dqkx.2014.068
    引用本文: 王娟, 王正海, 耿欣, 何凤萍, 祖玉川, 王磊, 2014. 大宝山多金属矿区土壤-植被稀土元素生物地球化学特征. 地球科学, 39(6): 733-740. doi: 10.3799/dqkx.2014.068
    Wang Juan, Wang Zhenghai, Geng Xin, He Fengping, Zu Yuchuan, Wang Lei, 2014. REE Biogeochemistry of Soil-Vegetation System in Dabaoshan Polymetallic Mine. Earth Science, 39(6): 733-740. doi: 10.3799/dqkx.2014.068
    Citation: Wang Juan, Wang Zhenghai, Geng Xin, He Fengping, Zu Yuchuan, Wang Lei, 2014. REE Biogeochemistry of Soil-Vegetation System in Dabaoshan Polymetallic Mine. Earth Science, 39(6): 733-740. doi: 10.3799/dqkx.2014.068

    大宝山多金属矿区土壤-植被稀土元素生物地球化学特征

    doi: 10.3799/dqkx.2014.068
    基金项目: 

    国家自然科学基金 41072247

    详细信息
      作者简介:

      王娟(1989-),女,在读研究生,主要从事国土资源环境遥感方面的研究工作.E-mail: shijuan1919@sina.com

      通讯作者:

      王正海,E-mail: wzhengh@mail.sysu.edu.cn

    • 中图分类号: P593

    REE Biogeochemistry of Soil-Vegetation System in Dabaoshan Polymetallic Mine

    • 摘要: 为研究采矿对土壤-植被REE生物地球化学特征的影响,采集大宝山多金属矿区及背景区土壤及优势植物芒萁、马尾松叶片,测量REE含量.对比分析样品中REE分布模式、∑REE、δEu、δCe及四重效应等地球化学特征.结果表明:受采矿活动影响,矿区土壤REE含量均值达284.99 mg/kg,显著高于背景区,且表土层REE含量明显高于心土层;相对于背景区,矿区土壤和植被轻重稀土分馏更弱;研究区土壤和植被都为Eu亏损,大都为Ce富集,马尾松与土壤REE含量呈正相关,REE富集植物芒萁在背景区富集系数反而更高;矿区环境抑制植物对REE正常的迁移和分异,对植被生长不利,植被REE分布分异特征是其对生长环境的反映和适应.

       

    • 图  1  研究区植被及采样分布

      Fig.  1.  Plants in study area and sampling area

      图  2  土壤稀土元素分布模式

      Fig.  2.  REE distribution pattern of soils

      图  3  植物REE分布模式

      Fig.  3.  REE distribution patterns of vegetation

      图  4  植被稀土元素吸收系数

      a.马尾松;b.芒萁

      Fig.  4.  The BAC of REE by vegetation

      表  1  土壤REE含量及相关参数

      Table  1.   The concentration REE in soils and key REE parameters

      La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm
      Ba 8.29 147.80 1.70 5.67 1.22 0.25 1.61 0.19 1.18 0.25 0.82 0.15
      Bb 8.43 176.40 1.74 5.85 1.27 0.27 1.77 0.20 1.22 0.25 0.85 0.15
      Ma 8.22 302.00 12.82 45.60 8.99 2.08 9.41 1.30 7.58 1.48 4.24 0.63
      Mb 18.95 240.20 3.83 13.46 2.79 0.68 3.76 0.51 3.30 0.71 2.21 0.36
      Yb Lu Y ∑Eu ∑Y ∑REE ∑Eu/∑Y δEu δCe Eu/Sm Sm/Nb Gd/Eu
      Ba 1.13 0.19 6.10 164.92 11.62 176.54 14.20 0.45 8.22 0.20 0.21 6.53
      Bb 1.18 0.19 5.70 193.95 11.51 205.46 16.85 0.47 9.60 0.21 0.22 6.57
      Ma 4.01 0.59 37.69 379.70 66.92 446.62 5.67 0.49 6.13 0.23 0.20 4.53
      Mb 2.38 0.36 17.86 279.91 31.44 311.35 8.90 0.53 5.88 0.24 0.21 5.54
      注:B.背景区;M.矿区;P.马尾松;D.芒萁;N.新叶;O.老叶;a.a层土壤;b.b层土壤;含量单位为mg/kg;与文中和其他图表中简写统一.
      下载: 导出CSV

      表  2  植被稀土元素相关参数

      Table  2.   Key REE parameters in vegetation

      马尾松 芒萁
      BN BO MN MO BN BO MN MO
      La 0.071 0.182 0.129 0.779 38.08 222.28 159.63 153.83
      Ce 0.405 1.377 0.181 1.768 345.27 2 387.77 309.06 565.83
      Pr 0.015 0.039 0.029 0.189 19.51 112.54 110.21 108.78
      Nd 0.054 0.140 0.103 0.707 13.23 76.23 83.64 83.11
      Sm 0.008 0.023 0.017 0.117 5.82 33.73 37.75 38.19
      Eu 0.002 0.006 0.003 0.024 2.79 15.35 17.24 17.44
      Gd 0.009 0.028 0.014 0.123 6.00 39.82 19.19 21.03
      Tb 0.001 0.003 0.001 0.016 2.74 15.09 9.84 9.90
      Dy 0.004 0.016 0.008 0.089 1.45 8.27 5.13 4.91
      Ho 0.001 0.004 0.001 0.017 1.19 5.93 3.02 2.86
      Er 0.002 0.011 0.004 0.047 1.01 5.62 2.79 2.67
      Tm 0.001 0.002 0.000 0.007 1.21 4.52 1.50 1.40
      Yb 0.002 0.011 0.003 0.043 0.81 4.29 1.30 1.23
      Lu 0.001 0.002 0.001 0.006 1.05 3.34 0.79 0.77
      Y 0.020 0.108 0.039 0.462 1.02 5.66 2.37 2.17
      ∑Ce 0.562 1.794 0.474 3.706 424.69 2 847.90 717.53 967.19
      ∑Y 0.038 0.183 0.072 0.809 16.48 92.54 45.93 46.94
      δEu 0.632 0.347 0.509 0.386 1.61 0.26 2.47 0.25
      Eu/Sm 5.833 5.091 5.125 5.206 0.48 0.46 0.46 0.46
      ∑Ce/∑Y 14.693 9.827 6.597 4.579 25.77 30.77 15.62 20.60
      δCe 2.590 6.310 0.470 9.821 2.64 5.72 0.41 10.73
      ∑REE 0.600 1.976 0.546 4.515 441.17 2 940.44 763.46 1 014.13
      Sm/Nb 0.140 0.161 0.162 0.166 0.44 0.44 0.45 0.46
      Gd/Eu 5.833 5.091 5.125 5.206 2.15 2.59 1.11 1.21
      下载: 导出CSV

      表  3  土壤和植被四重效应值

      Table  3.   REE tetrad effect in soils and plants

      土壤 马尾松 芒萁
      B M BN BO MN MO BN BO MN MO
      t1 0.81 0.80 1.26 1.45 0.63 0.78 3.66 3.98 1.60 2.19
      t3 1.25 1.08 0.85 0.70 0.78 0.81 0.74 0.73 0.93 0.90
      t4 0.68 0.69 1.15 0.65 0.58 0.66 1.13 1.00 1.03 1.03
      T 0.65 0.68 1.08 0.87 0.66 0.75 1.45 1.42 1.15 1.27
      下载: 导出CSV
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