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    珠江口沉积地球化学特征与古环境演化过程

    王珊珊 曹志敏 兰东兆 郑志昌

    王珊珊, 曹志敏, 兰东兆, 郑志昌, 2010. 珠江口沉积地球化学特征与古环境演化过程. 地球科学, 35(2): 261-267. doi: 10.3799/dqkx.2010.026
    引用本文: 王珊珊, 曹志敏, 兰东兆, 郑志昌, 2010. 珠江口沉积地球化学特征与古环境演化过程. 地球科学, 35(2): 261-267. doi: 10.3799/dqkx.2010.026
    WANG Shan-shan, CAO Zhi-min, LAN Dong-zhao, ZHENG Zhi-chang, 2010. Geochemical Characteristics of Sediment of Pearl River Estuary and Its Paleoenvironmental Evolution. Earth Science, 35(2): 261-267. doi: 10.3799/dqkx.2010.026
    Citation: WANG Shan-shan, CAO Zhi-min, LAN Dong-zhao, ZHENG Zhi-chang, 2010. Geochemical Characteristics of Sediment of Pearl River Estuary and Its Paleoenvironmental Evolution. Earth Science, 35(2): 261-267. doi: 10.3799/dqkx.2010.026

    珠江口沉积地球化学特征与古环境演化过程

    doi: 10.3799/dqkx.2010.026
    基金项目: 

    国家海洋局"908"专项"重要三角洲演变规律及重大事件的沉积记录与可持续发展研究" No.908-02-02-05

    详细信息
      作者简介:

      王珊珊(1980-), 女, 博士, 主要从事海洋环境地质学和海洋工程研究.E-mail: shanshwang@gmail.com

    • 中图分类号: P628;P59

    Geochemical Characteristics of Sediment of Pearl River Estuary and Its Paleoenvironmental Evolution

    • 摘要: 利用ICP-AES法和重铬酸钾氧化还原容量法测定珠江口沉积物中的微量元素和总有机质含量, 结合沉积物粒度参数, 采用因子分析方法识别控制沉积物化学组成和元素行为的3个因子: 流域侵蚀因子、表生沉积作用控制因子和海洋环境控制因子.研究发现, 3个控制因子的得分曲线基本反映了该地区气候干湿、冷暖的强弱变化, 可作为恢复古气候环境的代用曲线; 在本岩心所代表的沉积年代中共有5次较为明显的环境变化, 为深入研究珠江三角洲区域古环境、古气候演化提供了重要的参考依据.

       

    • 图  1  研究区环境和采样站位图

      Fig.  1.  Setting and sampling station of core ZXZ2

      图  2  沉积柱地球化学和粒度参数指标垂直剖面图

      Fig.  2.  Vertical profiles of chemical elements and mean grain size in the sediments of core ZXZ2

      图  3  珠江口ZXZ2孔沉积物因子得分曲线图

      Fig.  3.  Curves of factor scores of sediments of core ZXZ2

      表  1  因子分析结果

      Table  1.   Results of factor analysis

      公因子 变量及公因子负载 方差贡献(%)
      F1 Co 0.873  Cu 0.906  Ni 0.925  Zn 0.807  Cr 0.628  平均粒径 0.710 42.06
      F2 Sr 0.885  Ba 0.949 21.95
      F3 Zr 0.748  有机质 -0.937 21.58
      下载: 导出CSV

      表  2  沉积物因子得分

      Table  2.   Factor scores of sediments of core ZXZ2

      编号 深度(m) F1因子 F2因子 F3因子
      1 0.0~0.2 0.814 1.005 0.561
      2 0.2~0.4 0.714 -0.473 1.197
      3 0.4~0.6 0.995 -0.137 2.616
      4 0.6~0.8 1.720 0.351 -0.090
      5 0.8~1.0 0.482 -0.245 -0.046
      6 1.0~1.2 0.252 0.272 -0.962
      7 1.2~1.4 -0.145 0.720 -0.318
      8 1.4~1.6 -0.356 0.495 -0.552
      9 1.6~1.8 -0.380 0.082 -0.242
      10 1.8~2.0 0.134 0.241 -1.359
      11 2.0~2.2 -0.488 0.418 -0.566
      12 2.2~2.4 -0.523 1.597 -0.155
      13 2.4~2.6 -2.109 -0.342 1.076
      14 2.6~2.8 -1.899 -1.134 0.486
      15 3.0~3.2 0.839 -2.920 -1.008
      16 3.3~3.5 -0.052 0.070 -0.639
      下载: 导出CSV
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    • 收稿日期:  2009-02-15
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