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    南海表层沉积物中的碳酸钙含量分布及其影响因素

    张兰兰 陈木宏 陈忠 向荣 刘建国

    张兰兰, 陈木宏, 陈忠, 向荣, 刘建国, 2010. 南海表层沉积物中的碳酸钙含量分布及其影响因素. 地球科学, 35(6): 891-898. doi: 10.3799/dqkx.2010.104
    引用本文: 张兰兰, 陈木宏, 陈忠, 向荣, 刘建国, 2010. 南海表层沉积物中的碳酸钙含量分布及其影响因素. 地球科学, 35(6): 891-898. doi: 10.3799/dqkx.2010.104
    ZHANG Lan-lan, CHEN Mu-hong, CHEN Zhong, XIANG Rong, LIU Jian-guo, 2010. Distribution of Calcium Carbonate and Its Controlling Factors in Surface Sediments of the South China Sea. Earth Science, 35(6): 891-898. doi: 10.3799/dqkx.2010.104
    Citation: ZHANG Lan-lan, CHEN Mu-hong, CHEN Zhong, XIANG Rong, LIU Jian-guo, 2010. Distribution of Calcium Carbonate and Its Controlling Factors in Surface Sediments of the South China Sea. Earth Science, 35(6): 891-898. doi: 10.3799/dqkx.2010.104

    南海表层沉积物中的碳酸钙含量分布及其影响因素

    doi: 10.3799/dqkx.2010.104
    基金项目: 

    国家自然科学基金项目 40631007

    国家自然科学基金项目 40906030

    中国科学院知识创新工程青年人才领域前沿项目 SQ200808

    国家"973"项目子课题 2007CB815905

    中科院知识创新工程重要方向项目 KZCX2-YW-228

    国家科技支撑计划课题 2006BAB19B03

    详细信息
      作者简介:

      张兰兰(1978-), 女, 助研, 博士, 主要从事海洋微体古生物与环境研究.E-mail: llzhang@scsio.ac.cn

    • 中图分类号: P588.2

    Distribution of Calcium Carbonate and Its Controlling Factors in Surface Sediments of the South China Sea

    • 摘要: 通过测定南海213个表层沉积物样品中的碳酸钙含量, 综合分析整个南海海域碳酸钙含量分布特征及其控制因素.结果表明, 不同的区域海洋环境, 控制表层沉积物中碳酸钙含量变化的因素也不尽相同: 大陆架区, 碳酸钙含量主要受陆源非碳酸盐物质的稀释作用而较低; 大陆坡区, 碳酸钙因丰富的物源量、低的陆源物质输入量和弱的碳酸钙溶解作用等因素而呈较高含量; 深海盆区, 碳酸钙含量因强烈的溶解作用而较低.根据碳酸钙含量在南海整个表层沉积物中的分布趋势, 推测南海纬度14°N以北的海域碳酸钙补偿深度(CCD)为3700m左右, 纬度14°N以南的海域CCD为4000m左右.Pearson相关分析表明, 南海表层沉积物中钙质超微化石对碳酸钙的含量分布具有较高的贡献率.

       

    • 图  1  进行碳酸钙分析测试的213个表层沉积物样品站位分布

      Fig.  1.  Distribution of 213 surface sediment samples for CaCO3 determination

      图  2  南海表层沉积物中碳酸钙含量(%)分布

      圆点代表取样站点;蓝色区域为残留沉积区;黄色区域为深水区高碳酸钙含量分布区;Ⅰ.河流入海口的浅水陆架区;Ⅱ.陆坡区;Ⅱ1.陆坡上升流区;Ⅱ2.陆坡甲烷渗漏区;Ⅲ.珊瑚礁区;Ⅳ.深海盆区

      Fig.  2.  Distribution of calcium carbonate content (%) in surface sediments of SCS

      图  3  南海表层沉积物中浮游有孔虫丰度(个·g-1)分布(徐建等,2001李学杰等,2004郭建卿等,2006崔喜江等,2006)

      黄色区域与图 2相对应,红色区域对应着图 2中的高碳酸钙含量

      Fig.  3.  Distribution of plankton foraminifer abundance (individuals·g-1) in surface sediments of SCS

      图  4  南海表层沉积物中钙质超微化石丰度(个·g-1)分布(王勇军等,2007)

      黄色区域与图 2对应, 红色区域与图 3对应, 蓝色区域为河流入口处

      Fig.  4.  Distribution of calcareous nannofossils abundance (individuals·g-1) in surface sediments of SCS

      图  5  南海表层沉积物中碳酸钙含量与水深的散点分布图

      Fig.  5.  Variance of calcium carbonate content versus water depth in surface sediments of SCS

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