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    南海表层沉积物中细粒组分的稀土元素地球化学特征

    刘建国 陈忠 颜文 陈木宏 殷学博

    刘建国, 陈忠, 颜文, 陈木宏, 殷学博, 2010. 南海表层沉积物中细粒组分的稀土元素地球化学特征. 地球科学, 35(4): 563-571. doi: 10.3799/dqkx.2010.072
    引用本文: 刘建国, 陈忠, 颜文, 陈木宏, 殷学博, 2010. 南海表层沉积物中细粒组分的稀土元素地球化学特征. 地球科学, 35(4): 563-571. doi: 10.3799/dqkx.2010.072
    LIU Jian-guo, CHEN Zhong, YAN Wen, CHEN Mu-hong, YIN Xue-bo, 2010. Geochemical Characteristics of Rare Earth Elements in the Fine-Grained Fraction of Surface Sediment from South China Sea. Earth Science, 35(4): 563-571. doi: 10.3799/dqkx.2010.072
    Citation: LIU Jian-guo, CHEN Zhong, YAN Wen, CHEN Mu-hong, YIN Xue-bo, 2010. Geochemical Characteristics of Rare Earth Elements in the Fine-Grained Fraction of Surface Sediment from South China Sea. Earth Science, 35(4): 563-571. doi: 10.3799/dqkx.2010.072

    南海表层沉积物中细粒组分的稀土元素地球化学特征

    doi: 10.3799/dqkx.2010.072
    基金项目: 

    国家自然科学基金 40631007

    国家"973"项目 2007CB815905

    国家"973"项目 2009CB219502

    国家基金委-广东联合基金 U0733003

    国家科技支撑计划项目 2006BAB19B03

    中国科学院知识创新工程领域前沿项目 SQ200713

    中国科学院知识创新工程领域前沿项目 LYQY200704

    中国科学院边缘海地质重点实验室开放基金 MSGL08-16

    中国科学院海洋地质与环境重点实验室开放基金 MGE2008KG08

    详细信息
      作者简介:

      刘建国(1978-), 男, 助理研究员, 从事海洋沉积与古环境研究.E-mail: jgliu@scsio.ac.cn

    • 中图分类号: P595;P736.4

    Geochemical Characteristics of Rare Earth Elements in the Fine-Grained Fraction of Surface Sediment from South China Sea

    • 摘要: 对南海表层沉积物中的细粒组分进行电感耦合等离子体质谱法测试, 探讨南海稀土元素分布特征及其影响因素.结果表明, 南海表层沉积物中稀土元素分布主要与陆源物质输入、生物活动和火山物质补给密切相关.南海细粒组分的配分模式与中国黄土的接近, 与周边的珠江、湄公河等河流输入物质也有相似性, 而与南海碱性玄武岩存在显著差异, 表明南海沉积物主要来自于周边大陆.稀土元素趋势分析表明, 珠江口往外至海南岛南部海域中沉积物朝东南方向向陆坡输送; 台西南至珠江口往外海域沉积物大多向南输运; 吕宋岛西部海域包括黄岩岛附近海域的火山物质主要向西北方向输送, 向西可达113°E、向北可至20°N附近; 南海南部沉积物整体上向南沙海槽西北部附近海域输送.

       

    • 图  1  南海表层沉积物取样站位分布

      Fig.  1.  Sampling location for surficial sediments of the South China Sea

      图  2  南海表层沉积物部分稀土元素参数分布等值线

      a.∑REE;b.∑LREE/∑HREE;c.δ Ce;d.δEu;e.∑MREE/∑REE;f.Eu/Sm

      Fig.  2.  Contour of some rare earth element distribution for surficial sediments of South China Sea

      图  3  南海沉积物与中国黄土、长江口、珠江口、湄公河沉积物以及南海碱性玄武岩稀土元素北美页岩标准化模式比较

      Fig.  3.  Comparison of NASC-normalized REE pattern of South China Sea sediments, Chinese loess, Yangtze River Mouth, Pearl River Mouth, Mekong River sediments and Cenozoic basalt in the South China Sea

      图  4  南海表层沉积物不同来源稀土元素北美页岩标准化模式

      07-DAN代表陆源为主;07-E407A代表火山源为主;NS93-9代表生物源为主

      Fig.  4.  NASC-normalized REE pattern of various source sediments in the South China Sea

      图  5  南海表层沉积物稀土元素三组分图解

      a.南北方向剖面;b.近东西方向剖面,剖面具体位置见图 1

      Fig.  5.  Triangular diagram of REE of surface sediments in the South China Sea

      图  6  南海北部陆架、南部陆架、珠江口、湄公河沉积物与印度尼西亚鲕粒岩的稀土元素配分模式

      Fig.  6.  NASC-normalized REE pattern of the northern slope, southern slope, Pearl River Mouth, Mekong River sediments and Indonesia ooids

      图  7  南海表层沉积物中稀土元素搬运趋势分布

      Fig.  7.  Transport patterns of REE in surface sediments of the South China Sea

      表  1  南海表层沉积物中细粒组分的稀土元素含量(10-6)

      Table  1.   Concentrations of REEs in the fine-grained fraction of surface sediments from the South China Sea

      元素 La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu ∑REE
      最大值 76.5 151.9 17.2 64.0 10.4 1.5 10.6 1.3 6.8 1.4 3.8 0.6 3.9 0.6 349.8
      最小值 5.7 5.9 1.2 4.3 1.0 0.2 1.0 0.2 0.9 0.2 0.5 0.1 0.5 0.1 21.7
      平均值 35.4 69.5 7.9 29.4 5.4 1.1 5.5 0.8 4.2 0.9 2.5 0.4 2.4 0.4 165.6
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