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孟加拉湾中部表层沉积物稀土元素特征及其物源指示意义

李景瑞 ,  刘升发 ,  冯秀丽 ,  孙兴全 ,  石学法

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文章导航 > 海洋地质与第四纪地质  > 2016 >  36(4): 41-50
李景瑞, 刘升发, 冯秀丽, 孙兴全, 石学法. 孟加拉湾中部表层沉积物稀土元素特征及其物源指示意义[J]. 海洋地质与第四纪地质, 2016, 36(4): 41-50. doi: 10.16562/j.cnki.0256-1492.2016.04.005
引用本文: 李景瑞, 刘升发, 冯秀丽, 孙兴全, 石学法. 孟加拉湾中部表层沉积物稀土元素特征及其物源指示意义[J]. 海洋地质与第四纪地质, 2016, 36(4): 41-50. doi: 10.16562/j.cnki.0256-1492.2016.04.005
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LI Jingrui, LIU Shengfa, FENG Xiuli, SUN Xingquan, SHI Xuefa. RARE EARTH ELEMENT GEOCHEMISTRY OF SURFACE SEDIMENTS IN MID-BENGAL BAY AND IMPLICATIONS FOR PROVENANCE[J]. Marine Geology & Quaternary Geology, 2016, 36(4): 41-50. doi: 10.16562/j.cnki.0256-1492.2016.04.005
Citation: LI Jingrui, LIU Shengfa, FENG Xiuli, SUN Xingquan, SHI Xuefa. RARE EARTH ELEMENT GEOCHEMISTRY OF SURFACE SEDIMENTS IN MID-BENGAL BAY AND IMPLICATIONS FOR PROVENANCE[J]. Marine Geology & Quaternary Geology, 2016, 36(4): 41-50. doi: 10.16562/j.cnki.0256-1492.2016.04.005
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孟加拉湾中部表层沉积物稀土元素特征及其物源指示意义


doi: 10.16562/j.cnki.0256-1492.2016.04.005
详细信息

  • 1. 中国海洋大学海洋地球科学学院, 海底科学与探测技术教育部重点实验室, 青岛 266100;

  • 2. 国家海洋局第一海洋研究所, 海洋沉积与环境地质国家海洋局重点实验室, 青岛 266061;

  • 3. 青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛 266061

    • 作者简介:

    李景瑞(1989-),男,博士生,主要从事海洋沉积学研究,E-mail:zhljr2008@126.com

  • 基金项目:

    全球变化与海气相互作用专项(GASI-02-IND-CJ02，GASI-GEOGE-03)；国家自然科学基金项目(UI606401)；青岛海洋科学与技术国家实验室鳌山科技创新计划项目(2015ASKJ03)；泰山学者工程专项

  • 中图分类号: P736.4

RARE EARTH ELEMENT GEOCHEMISTRY OF SURFACE SEDIMENTS IN MID-BENGAL BAY AND IMPLICATIONS FOR PROVENANCE

More Information

  • 1. College of Marine Geosciences, Ocean University of China;Key Laboratory of Submarine Geosciences and Prospecting, Qingdao 266100;

  • 2. Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;

  • 3. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061

  • 摘要: 通过对孟加拉湾中部110个表层沉积物进行稀土元素(REE)测试分析,揭示了研究区稀土元素含量和分布特征,并讨论了其物质来源。结果表明,研究区稀土元素含量介于93.90×10-6~220.80×10-6之间,平均含量为138.25×10-6,接近上陆壳含量。REE整体表现出轻稀土富集、重稀土含量相对均一的特征,Eu呈明显负异常,无明显Ce异常。应用富集系数、判别函数及∑REE-(La/Yb)N等方法判别其物质来源,结果证实研究区沉积物主要为喜马拉雅山和青藏高原来源,还有一部分物质来自中印度半岛,而伊洛瓦底江物质对研究区沉积物组成影响不明显。G-B (恒河-布拉马普特拉河)沉积物标准化后的稀土参数聚类分析表明,印度源区的主要影响范围位于研究区西侧,其控制因素主要是物质供应方式及孟加拉湾表层环流,尤其是东印度沿岸流(EICC)对印度源区物质的输运。
    Abstract: Rare earth elements (REEs) of 110 surface samples taken from the mid-Bengal Bay have been analyzed for provenance studies. The total REEs vary in a range from 93.90×10-6~220.80×10-6, with an average of 138.25×10-6, which is close to the Upper Continent Crust. The samples are relatively enriched in LREEs, with flat HREEs patterns and moderate negative Eu anomalies.No apparent Ce anomalies have been found. Enrichment factor, discrimination function and ∑REE-(La/Yb)N scatter diagram ascertain that the provenances are dominated by Himalaya and the Tibetan plateau with minor contributions from the India continent, but no apparent materials from Irrawaddy. Cluster analysis of REE parameters after Gangs-Brahmaputra (G-B) normalization implies that the main influence area of Indian provenance is in the west of the study area controlled by sediments supply and transport dynamics of the surface circulation system in the Bay of Bengal, especially the East India Coastal Current (EICC).
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出版历程
  • 收稿日期:  2015-11-13
  • 修回日期:  2016-01-21

孟加拉湾中部表层沉积物稀土元素特征及其物源指示意义

doi: 10.16562/j.cnki.0256-1492.2016.04.005
  • 1. 中国海洋大学海洋地球科学学院, 海底科学与探测技术教育部重点实验室, 青岛 266100;
  • 2. 国家海洋局第一海洋研究所, 海洋沉积与环境地质国家海洋局重点实验室, 青岛 266061;
  • 3. 青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛 266061
    • 作者简介:

    李景瑞(1989-),男,博士生,主要从事海洋沉积学研究,E-mail:zhljr2008@126.com

  • 收稿日期: 2015-11-13
  • 修回日期: 2016-01-21
基金项目:

全球变化与海气相互作用专项(GASI-02-IND-CJ02，GASI-GEOGE-03)；国家自然科学基金项目(UI606401)；青岛海洋科学与技术国家实验室鳌山科技创新计划项目(2015ASKJ03)；泰山学者工程专项

  • 中图分类号: P736.4

摘要: 通过对孟加拉湾中部110个表层沉积物进行稀土元素(REE)测试分析,揭示了研究区稀土元素含量和分布特征,并讨论了其物质来源。结果表明,研究区稀土元素含量介于93.90×10-6~220.80×10-6之间,平均含量为138.25×10-6,接近上陆壳含量。REE整体表现出轻稀土富集、重稀土含量相对均一的特征,Eu呈明显负异常,无明显Ce异常。应用富集系数、判别函数及∑REE-(La/Yb)N等方法判别其物质来源,结果证实研究区沉积物主要为喜马拉雅山和青藏高原来源,还有一部分物质来自中印度半岛,而伊洛瓦底江物质对研究区沉积物组成影响不明显。G-B (恒河-布拉马普特拉河)沉积物标准化后的稀土参数聚类分析表明,印度源区的主要影响范围位于研究区西侧,其控制因素主要是物质供应方式及孟加拉湾表层环流,尤其是东印度沿岸流(EICC)对印度源区物质的输运。

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