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    遵义下寒武统富硒黑色岩系地球化学: 成因和硒富集机理

    冯彩霞 刘燊 胡瑞忠 刘家军 罗泰义 池国祥 齐有强

    冯彩霞, 刘燊, 胡瑞忠, 刘家军, 罗泰义, 池国祥, 齐有强, 2010. 遵义下寒武统富硒黑色岩系地球化学: 成因和硒富集机理. 地球科学, 35(6): 947-958. doi: 10.3799/dqkx.2010.109
    引用本文: 冯彩霞, 刘燊, 胡瑞忠, 刘家军, 罗泰义, 池国祥, 齐有强, 2010. 遵义下寒武统富硒黑色岩系地球化学: 成因和硒富集机理. 地球科学, 35(6): 947-958. doi: 10.3799/dqkx.2010.109
    FENG Cai-xia, LIU Shen, HU Rui-zhong, LIU Jia-jun, LUO Tai-yi, CHI Guo-xiang, QI You-qiang, 2010. Geochemistry of Lower Cambrian Se-Rich Black Rock Series in Zunyi, Guizhou Province, Southwest China: The Petrogenesis and Enrichment Mechanism of Selenium. Earth Science, 35(6): 947-958. doi: 10.3799/dqkx.2010.109
    Citation: FENG Cai-xia, LIU Shen, HU Rui-zhong, LIU Jia-jun, LUO Tai-yi, CHI Guo-xiang, QI You-qiang, 2010. Geochemistry of Lower Cambrian Se-Rich Black Rock Series in Zunyi, Guizhou Province, Southwest China: The Petrogenesis and Enrichment Mechanism of Selenium. Earth Science, 35(6): 947-958. doi: 10.3799/dqkx.2010.109

    遵义下寒武统富硒黑色岩系地球化学: 成因和硒富集机理

    doi: 10.3799/dqkx.2010.109
    基金项目: 

    国家自然科学基金项目 40972071

    国家自然科学基金项目 40773036

    国家自然科学基金项目 40634020

    贵州省科学技术基金项目 黔科合J字[2008]2015号

    详细信息
      作者简介:

      冯彩霞(1976-), 女, 副研究员, 主要从事分散元素地球化学研究.E-mail: fengcaixia@vip.gyig.ac.cn

    • 中图分类号: P618.76

    Geochemistry of Lower Cambrian Se-Rich Black Rock Series in Zunyi, Guizhou Province, Southwest China: The Petrogenesis and Enrichment Mechanism of Selenium

    • 摘要: 利用XRF、ICP-MS和氢化物原子荧光光谱测试方法系统分析了贵州遵义下寒武统富硒黑色岩系中钾质斑脱岩、磷块岩、黑色页岩、硅质岩和Ni-Mo金属层样品中的主元素、微量元素、稀土元素及分散元素Se的组成.地球化学研究表明: 该套黑色岩系在成因上主要表现为热水沉积特征, 同时存在火山活动的影响.另外, 各层位样品都具有分散元素硒的富集异常特征.综合研究表明, 研究区分散元素硒的富集可能与大量硫化物的存在、热水沉积作用和火山作用有关.

       

    • 图  1  研究区地质略图以及采样位置(据张光弟等,2002修改)

      1.南沱组;2.陡山沱组;3.灯影组;4.牛蹄塘组;5.明心寺组;6.明心寺组与金顶山组并层;7.清虚洞组;8.断层;9.地质界线;10.采样地点

      Fig.  1.  Sample location and geological sketch map of the study area

      图  2  遵义下寒武统富硒黑色岩系微量元素蛛网

      Fig.  2.  Trace elements spider diagram of the Lower Cambrian Se-rich black rock series in Zunyi

      图  3  遵义下寒武统富硒黑色岩系陨石和北美页岩稀土元素标准化模式

      Fig.  3.  Chondrite-normalized and North American shale-normalized REE patterns of the Lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province

      图  4  黑色岩系Zn-Co-Ni图解(Jai and Yu, 1992)

      Ⅰ.海底热水沉积;Ⅱ.水成沉积型深海锰结核

      Fig.  4.  Zn-Co-Ni diagram of the black rock series

      表  1  遵义下寒武统富硒黑色岩系常量元素含量(%)

      Table  1.   Major element contents (%) of the Lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province

      样品号 岩性 SiO2 Al2O3 Fe2O3 MgO CaO Na2O K2O MnO P2O5 TiO2 LOI Total
      znrp3-2 钾质斑脱岩 54.26 22.54 2.10 2.16 0.06 0.07 5.59 0.11 1.17 0.22 11.54 99.82
      znrp3-3 钾质斑脱岩 54.17 25.45 1.68 2.23 0.00 0.01 6.80 0.12 0.20 0.21 9.51 100.38
      znrp3-4 钾质斑脱岩 52.11 22.85 9.15 2.61 0.39 0.04 5.89 0.02 0.47 0.18 6.71 100.43
      znrp3-6 钾质斑脱岩 57.72 25.38 3.09 2.61 0.07 0.05 6.72 0.01 0.19 0.18 4.37 100.39
      znrp3-8 钾质斑脱岩 55.80 15.94 1.30 2.02 0.10 0.08 4.30 0.06 0.58 0.62 12.06 92.86
      znc-8 钾质斑脱岩 50.23 15.83 13.85 3.99 0.80 0.04 4.39 0.01 1.11 0.61 9.52 100.39
      znrp3-12 磷块岩 18.43 9.47 14.23 2.26 10.92 0.05 1.91 0.02 14.06 0.37 28.67 100.39
      znrp3-13 磷块岩 18.51 9.87 22.62 1.51 0.49 0.05 1.05 0.01 16.07 0.20 30.03 100.40
      znrp3-14 钙质磷块岩 0.06 1.17 2.02 0.05 37.20 0.04 0.22 0.02 28.27 0.02 31.12 100.20
      znc-6 钙质磷块岩 0.80 2.00 5.49 0.25 31.16 0.04 0.34 0.01 27.34 0.04 32.45 99.92
      znc-9 钙质磷块岩 6.61 6.19 8.64 1.43 24.38 0.06 1.33 0.00 20.23 0.18 31.30 100.35
      znrp3-15 黑色页岩 36.88 12.80 6.49 1.29 8.41 0.07 2.93 0.12 8.07 0.53 22.75 100.33
      znrp3-16 黑色页岩 65.69 11.78 5.39 1.11 1.62 0.64 2.50 0.08 0.73 0.58 8.73 98.86
      xz-1 黑色页岩 61.09 11.05 4.83 1.58 2.20 1.23 1.97 0.08 0.67 0.49 14.30 99.50
      xz-2 黑色页岩 54.57 18.37 1.23 2.97 0.13 0.09 4.73 0.08 0.31 0.18 16.04 98.70
      xz-7 黑色页岩 59.67 12.99 4.88 1.85 3.53 1.47 2.38 0.19 0.18 0.49 12.01 99.65
      znc-7-1 黑色页岩 62.23 20.31 6.35 2.46 0.06 0.00 5.13 0.02 1.17 0.29 8.80 106.81
      znc-10-1 碳硅质页岩 72.87 16.97 3.73 1.35 0.32 0.33 4.02 0.01 0.11 0.57 0.12 100.40
      znrp3-5 碳硅质页岩 65.86 16.21 4.94 1.97 0.37 0.02 3.95 0.14 1.01 0.17 5.78 100.41
      xz-8 碳硅质页岩 63.55 13.68 5.11 1.39 0.75 0.96 2.71 0.04 0.44 0.55 10.63 99.81
      znc-1 碳硅质页岩 72.44 10.28 0.76 0.78 0.11 0.47 2.63 0.02 0.33 0.66 10.90 99.38
      znc-2 碳硅质页岩 71.59 8.81 2.09 0.81 0.13 0.05 2.34 0.01 1.80 0.42 12.32 100.37
      znc-3 碳硅质页岩 65.29 6.65 0.65 0.56 0.41 0.11 1.64 0.02 0.64 0.26 23.32 99.55
      znc-4 碳硅质页岩 66.38 7.05 0.69 0.63 2.23 0.08 1.76 0.01 2.72 0.29 18.97 100.81
      znc-5 碳硅质页岩 70.98 6.93 1.16 0.61 2.76 0.05 1.73 0.02 3.48 0.29 13.33 101.34
      xz-6 钙质页岩 34.80 4.72 1.84 10.72 19.45 0.09 0.83 0.71 0.08 0.20 26.48 99.92
      znrp3-7 硅质岩 91.13 1.77 1.68 0.16 0.01 0.01 0.42 0.12 0.36 0.07 4.73 100.46
      下载: 导出CSV

      表  2  遵义下寒武统富硒黑色岩系微量元素含量(μg/g)

      Table  2.   Trace element and REE content (μg/g) of the Lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province

      样品号 V Cr Co Ni Cu Zn As Rb Sr Mo Sb Ba Pb Bi Th U Ba/Sr U/Th
      znrp3-2 2 100 149 5.76 37.0 51.4 70.7 49.4 188 36.8 68.9 1.88 3 790 13.4 0.76 31.1 26.7 103 0.86
      znrp3-3 1 810 151 2.89 14.7 40.5 16.1 21.2 161 13.0 32.1 1.98 4 270 10.3 0.70 28.0 29.8 328 1.06
      znrp3-4 1 390 113 3.52 13.4 92.2 24.3 25.0 148 15.5 36.6 1.63 3 970 13.1 0.68 25.1 27.7 256 1.10
      znrp3-6 276 9.11 3.70 10.1 45.6 24.4 33.7 136 65.2 23.9 2.23 8 680 66.6 1.11 31.8 13.0 133 0.41
      znrp3-8 727 696 58.8 40.4 59.6 35.7 26.3 165 59.7 20.5 1.99 6 960 20.8 0.58 12.6 46.4 117 3.68
      znc-8 132 99 47.8 37.5 87.3 119 39.2 156 37.2 31.0 3.29 3 470 48.4 0.29 5.06 26.5 93.3 5.24
      7.50 1.60 0.83 0.31 1.12 0.63 16.00 1.47 0.10 24.83 4.28 11.21 2.05 0.36 2.93 13.70
      znrp3-12 783 351 13.6 16.7 55.9 26.8 25.5 103 200 29.6 2.71 2 920 150 0.25 6.73 151 14.6 22.4
      znrp3-13 1 410 1 030 24.3 16.8 39.2 52.9 45.8 53.1 87.4 36.7 3.23 5 160 120 0.29 7.04 94.4 59.04 13.4
      znrp3-14 535 413 16.4 47.2 18.7 65.1 14.6 12.3 517 4.71 1.00 985 70.0 0.19 2.69 149 1.91 55.3
      znc-6 621 408 24.8 48.7 21.9 24.8 20.4 19.7 307 17.1 1.51 1 670 101 0.14 1.71 276 5.44 161
      znc-9 772 343 19.0 33.7 40.8 43.7 30.0 73.2 555 27.7 1.97 5 330 69.1 0.15 3.42 107 9.60 31.3
      5.76 4.01 0.79 0.40 0.63 0.56 13.43 0.48 0.87 16.20 4.12 6.94 7.29 0.11 0.57 75.08
      znrp3-15 1 810 2 620 46.6 413 92.9 808 64.7 120 187 14.6 6.35 2 530 30.5 0.36 18.5 31.6 13.5 1.71
      znrp3-16 251 103 45.4 865 59.6 686 98.2 94.5 87.2 428 9.96 1 470 71.7 0.54 11.1 73.0 16.9 6.58
      xz-1 322 82.5 57.4 516 85.1 632 64.4 92.9 128 545 7.63 1 020 76.7 0.57 10.1 120 8.0 11.9
      xz-2 1 530 165 16.8 75.50 29.5 77.7 29.8 142 45.9 298 2.28 11 900 22.2 0.75 30.0 19.6 259 0.65
      xz-7 348 78.6 26.6 228 51.2 244 33.2 116 144 94.3 4.56 1 490 39.5 0.31 9.35 26.5 10.3 2.83
      znc-7-1 920 131 38.8 42.9 39.9 61.5 56.2 189 37.1 42.2 2.09 3 570 38.8 0.67 23.3 46.6 96.2 2.00
      znc-10-1 52.6 21.0 22.9 16.3 3.14 61.4 8.62 143 48.6 0.74 0.44 431 6.03 0.11 12.1 2.18 8.87 0.18
      znrp3-5 694 211 39.8 59.8 50.7 143 58.6 128 76.0 67.2 2.60 8 230 52.2 0.69 22.4 28.0 108 1.25
      xz-8 461 100 45.9 1110 79.7 485 162 131 68.3 360 8.64 1 500 76.4 0.55 11.2 98.8 22.0 8.82
      znc-1 3 720 735 31.2 50.9 7.56 23.9 58.4 119 23.7 53.4 7.51 2 210 32.6 0.32 8.85 19.7 93.2 2.23
      znc-2 1 090 1 290 27.0 56.0 42.6 22.3 28.1 97.1 14.9 32.0 1.86 2 030 18.0 0.35 7.07 25.5 136 3.61
      znc-3 1 000 953 83.2 69.7 11.9 42.6 19.1 69.1 22.3 41.6 1.82 1 420 14.8 0.24 5.30 19.0 63.7 3.58
      znc-4 1 050 1 080 102 68.4 18.9 38.9 19.0 73.2 46.6 23.1 1.99 1 460 16.0 0.26 5.23 22.4 31.3 4.28
      znc-5 744 542 68.4 44.9 31.6 19.6 18.0 74.4 63.6 31.0 1.92 2 650 18.4 0.22 5.63 25.8 41.7 4.58
      xz-6 138 25 23.2 449 11.6 122 25.5 36.8 242 18.9 2.22 919 17.1 0.08 3.92 6.75 3.80 1.72
      6.59 4.27 1.82 3.33 0.73 3.03 24.42 1.00 0.22 95.57 8.14 6.17 2.53 0.21 1.61 18.21
      znrp3-7 706 664 56.9 37.9 56.4 34.2 26.1 165 59.8 20.0 1.94 7 030 21.2 0.62 12.8 48.3 118 3.77
      4.94 5.23 2.30 0.47 1.01 0.45 12.87 1.53 0.16 13.99 3.82 15.18 1.51 0.33 1.68 23.33
      ZNRP3-18 221 54.3 178 18 700 852 2 140 4 469 8.44 167 38 900 235 862 440 11.9 3.27 48.2 5.16 14.7
      ZY-2 584 48.1 207 24 500 755 5 530 5 226 21.0 349 59 600 287 519 882 5.56 3.63 515 1.49 142
      2.81 0.40 7.79 266 14.35 50.26 2 388 0.14 0.68 34 441 514 1.49 47.21 4.59 0.45 136
      143 127 24.7 81.3 56 76.3 2.03 108 382 1.43 0.507 463 14 1.9 7.6 2.07
      注:Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ和Ⅵ分别代表钾质斑脱岩、磷块岩、黑色页岩、硅质岩、Ni-Mo和地壳元素丰度值;富集层样品中各微量元素平均值相对地壳元素丰度值的富集系数;地壳元素丰度值据黎彤,1992.
      下载: 导出CSV

      表  3  遵义下寒武统富硒黑色岩系稀土元素含量(μg/g)及相关参数

      Table  3.   REE content (μg/g) and relative parameters of the Lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province

      样品号 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ∑REE LREE/HREE (La/Yb)n (La/Sm)n (Gd/Yb)n δ Eus δCes
      znrp3-2 63.1 131.0 17.7 69.5 16.3 1.00 13.4 2.56 15.5 3.56 9.91 1.53 10.3 1.44 357 5.13 4.14 2.44 1.05 0.30 0.85
      znrp3-3 23.7 49.8 7.05 28.5 6.93 0.37 6.28 1.34 9.32 2.27 6.86 1.09 7.95 1.16 153 3.21 2.01 2.15 0.64 0.24 0.84
      znrp3-4 28.4 57.9 8.15 32.7 7.94 0.43 7.22 1.59 10.8 2.67 7.64 1.22 8.48 1.20 176 3.32 2.26 2.25 0.69 0.25 0.83
      znrp3-6 79.8 164.0 21.7 83.7 20.3 0.61 16.3 3.02 18.0 4.12 11.6 1.68 11.1 1.55 437 5.50 4.86 2.47 1.19 0.15 0.86
      znrp3-8 12.6 20.0 4.94 26.0 8.45 0.59 9.56 1.84 11.7 2.72 7.52 1.18 8.28 1.20 117 1.65 1.03 0.94 0.94 0.29 0.55
      znc-8 11.5 18.8 5.3 28.5 8.22 1.36 8.01 1.34 7.61 1.59 3.86 0.49 2.96 0.40 100 2.81 2.63 0.88 2.19 0.73 0.52
      znrp3-12 132.0 161.0 39.2 166.0 36.8 7.57 32.9 5.66 31.6 6.64 16.1 1.99 11.7 1.34 651 5.02 7.62 2.26 2.28 0.95 0.49
      znrp3-13 49.3 87.5 18.0 70.2 14.7 3.12 9.73 1.95 9.83 2.06 5.96 0.94 8.21 1.24 283 6.08 4.06 2.11 0.96 1.15 0.64
      znrp3-14 156.0 146.0 37.0 163 33.5 7.78 34.0 6.77 40.2 9.71 25.8 3.06 16.7 2.17 682 3.93 6.31 2.93 1.65 1.01 0.42
      znc-6 127.0 124.0 29.5 127 26.3 5.82 26.3 4.55 27.1 6.51 17.1 2.16 12.3 1.59 537 4.50 6.98 3.04 1.73 0.97 0.44
      znc-9 184.0 215.0 50.5 210 45.3 9.49 40.3 7.07 40.0 8.84 21.6 2.62 14.3 1.64 851 5.24 8.69 2.56 2.28 0.98 0.49
      znrp3-15 52.3 63.5 11.8 52.1 12.30 2.70 11.55 2.37 14.00 3.26 9.09 1.30 8.78 1.33 246 3.77 4.03 2.68 1.07 1.00 0.56
      znrp3-16 49.6 89.4 9.13 35.7 6.69 1.56 5.85 1.17 6.58 1.55 4.33 0.55 3.37 0.49 216 8.04 9.95 4.67 1.41 1.09 0.92
      xz-1 48.3 78.4 9.15 35.8 6.83 1.38 6.07 1.05 6.13 1.45 3.85 0.51 3.03 0.41 202 7.99 10.77 4.45 1.62 0.94 0.81
      xz-2 57.6 120.0 16.0 64.1 17.0 0.51 16.4 3.22 20.3 4.58 12.5 1.86 12.3 1.67 348 3.78 3.16 2.13 1.08 0.14 0.86
      xz-7 21.9 42.2 5.30 20.6 4.52 0.80 3.67 0.66 4.02 0.94 2.66 0.37 2.42 0.36 110 6.32 6.12 3.05 1.23 0.86 0.85
      znc-7-1 48.5 98.8 14.2 59.6 14.6 1.14 11.8 2.16 12.5 2.79 7.46 1.09 7.21 0.96 283 5.15 4.55 2.09 1.32 0.38 0.82
      znc-10-1 37.9 78.4 9.18 34.9 6.71 1.18 4.79 0.92 5.42 1.23 3.42 0.50 3.59 0.49 189 8.26 7.13 3.56 1.08 0.91 0.92
      znrp3-5 53.4 103.0 14.8 60.5 16.0 1.28 15.7 3.11 19.5 4.40 11.7 1.68 10.4 1.41 317 3.67 3.47 2.10 1.22 0.35 0.80
      xz-8 29.9 56.3 6.86 27.1 5.30 1.01 4.34 0.77 4.31 1.00 2.66 0.37 2.43 0.34 143 7.80 8.31 3.55 1.45 0.92 0.86
      znc-1 27.7 40.8 5.30 18.5 2.74 0.45 1.97 0.36 2.16 0.57 1.82 0.29 2.00 0.29 105 10.1 9.36 6.36 0.80 0.86 0.73
      znc-2 20.6 21.8 3.96 16.7 3.37 0.57 4.00 0.75 5.74 1.72 5.37 0.81 5.37 0.77 92 2.73 2.59 3.85 0.60 0.69 0.53
      znc-3 27.7 31.1 6.12 25.4 5.42 0.94 5.36 0.97 6.43 1.64 4.65 0.64 3.94 0.53 121 4.00 4.75 3.22 1.10 0.77 0.52
      znc-4 18.0 24.5 5.32 23.1 5.36 1.01 5.04 0.89 5.75 1.49 4.15 0.59 3.63 0.51 99 3.51 3.35 2.11 1.12 0.85 0.55
      znc-5 16.7 27.5 6.24 27.3 6.75 1.31 5.46 0.97 5.68 1.27 3.48 0.47 2.98 0.41 107 4.14 3.79 1.56 1.48 0.94 0.59
      xz-6 12.2 22.1 2.82 11.0 2.60 0.42 2.31 0.41 2.59 0.59 1.68 0.24 1.59 0.22 61 5.31 5.18 2.95 1.18 0.75 0.82
      znrp3-7 12.4 20.1 4.95 26.3 8.60 0.63 9.26 1.80 11.8 2.78 7.62 1.19 8.09 1.23 117 1.67 1.04 0.91 0.93 0.31 0.56
      ZNRP3-18 37.9 66.1 7.55 32.5 6.50 1.69 5.81 1.08 6.00 1.35 3.29 0.39 2.03 0.28 172 7.53 12.6 3.67 2.32 1.21 0.85
      ZY-2 98.1 126.0 20.2 88.4 16.9 4.25 17.08 2.77 16.1 3.76 9.27 1.08 5.67 0.68 410 6.27 11.7 3.65 2.44 1.10 0.62
      注:北美页岩标准化REE数据据Sun and McDonough, 1989δCesδEus指北美页岩标准化后计算的值;δCe=Ces/Ce*;Ce*=(Las·Prs)1/2δEus=Eus/Eu*;Eu*=(Sms·Gds)1/2.
      下载: 导出CSV

      表  4  遵义下寒武统富硒黑色岩系分散元素Se含量(μg/g)

      Table  4.   The Se content (μg/g) of the Lower Cambrian Se-rich black rock series in Zunyi, Guizhou Province

      样品 Se 样品 Se 样品 Se 样品 Se 样品 Se 富集系数
      znrp3-2 30.3 znrp3-12 118 znrp3-15 2.34 znc-10-1 20.1 znc-4 20.1 801
      znrp3-3 16.9 znrp3-13 46.1 znrp3-16 34.6 znrp3-5 82.2 znc-5 15.6 531.2
      znrp3-4 78.6 znrp3-14 1.20 xz-1 39.2 xz-8 44.9 xz-6 21.8 449
      znrp3-6 219 znc-6 5.24 xz-2 36.9 znc-1 20.9 ZNRP3-18 1 006 123
      znrp3-8 11.4 znc-9 68.5 xz-7 44.9 znc-2 89.4 ZY-2 998 11 133
      znc-8 76.3 znrp3-7 11.1 znc-7-1 104 znc-3 28.7 地壳丰度 0.09
      注:Ⅰ、Ⅱ、Ⅲ、Ⅳ和Ⅴ分别代表钾质斑脱岩、磷块岩、黑色页岩、硅质岩和Ni-Mo富集层样品中分散元素Se平均含量相对地壳元素丰度值的富集系数;地壳元素丰度值据黎彤,1992.
      下载: 导出CSV
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    • 收稿日期:  2009-12-22
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