海洋学研究 ›› 2021, Vol. 39 ›› Issue (3): 72-83.DOI: 10.3969/j.issn.1001-909X.2021.03.008

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三亚近岸海域表层沉积物微量元素地球化学特征

张从伟1,2,瞿洪宝1,熊元凯1,韩孝辉1,2,龙根元1,2,仝长亮1,2   

  1. 1.海南省海洋地质调查研究院，海南 海口 570206；
    2.海南省海洋地质资源与环境重点实验室，海南 海口 570206
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 基金资助:
    2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC350，2019RC349)；海南省海洋地质资源与环境重点实验室自主课题资助项目(ZZ［2020］2019256-01)

Geochemical characteristics of trace elements in surface sediments from Sanya offshore area

ZHANG Congwei1,2, QU Hongbao1, XIONG Yuankai1, HAN Xiaohui1,2, LONG Genyuan1,2, TONG Changliang1,2#br# #br#   

  1. 1.Marine Geological Survey Institute of Hainan Province, Haikou 570206, China; 
    2.Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China
  • Online:2021-09-15 Published:2021-09-15

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摘要： 为了解三亚近岸海域沉积物地球化学特征，测定了331个站位的表层沉积物23种微量元素含量；利用多元统计法进行相关性及R型因子分析，探讨研究区元素的来源、分布特征及其控制因素。微量元素含量测定结果表明，Sr、Ba、Zr、Rb元素平均值比其他元素高；Be、Cr、Co、Ni、Cu、Zn、Cd、Sb、Pb、U、Zr、Ba、Sc、V、Ga等15种元素含量与海南岛水系沉积物、表层土壤、深层土壤接近，推测沉积物主要来自海南岛。各元素在研究区的空间分布比较复杂，在中部和东部，以Li为代表的15种微量元素随离岸距离增加含量增大；Cd、Sb、Zr、Ba、Rb、Sr、As、Hg的分布特征与其他微量元素相比差异明显。Li等15种元素来源与分布主要受陆源黏土矿物吸附作用控制，Sr主要受海洋生源沉积作用的控制，Zr主要受重矿物的控制，Ba和Rb主要受研究区地质背景控制，而Cd和As的来源与分布则与人类活动有关。

关键词: 表层沉积物, 微量元素, 地球化学, 控制因素, 三亚近岸海域

Abstract: In order to understand the geochemical characteristics in surface sediments from Sanya offshore area, the contents of 23 trace elements in surface sediments of 331 stations were determined. Multivariate statistical method was used for correlation and R-type factor analysis to explore the source, distribution characteristics and control factors of elements in the study area. The determination of trace elements show that the average values of Sr, Ba, Zr and Rb are higher than those of other elements; The contents of 15 elements such as Be, Cr, Co, Ni, Cu, Zn, Cd, Sb, Pb, U, Zr, Ba, Sc, V and Ga are close to those of stream sediments, surface soil and deep soil in Hainan Island. It is speculated that the sediments mainly come from Hainan Island. The spatial distribution of elements in the study area is complex. In the middle and east, the contents of most trace elements(15) represented by Li increase with the increase of offshore distances; The distribution characteristics of Cd, Sb, Zr, Ba, Rb, Sr, As and Hg are significantly different from other trace elements. The source and distribution of 15 elements such as Li are mainly controlled by the adsorption of terrigenous clay minerals, the source and distribution of Sr are mainly controlled by marine biogenic sedimentation, the source and distribution of Zr are mainly controlled by heavy minerals, the source and distribution of Ba and Rb are mainly controlled by the geological background of the study area, while the source and distribution of Cd and As are related to human activities.

Key words: surface sediments, trace element, geochemistry, control factors, Sanya offshore area

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