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| 北黄海表层沉积物常量元素分布特征及其控制因素分析 |
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方海超1,2,3, 黄 朋1,2, 周 宇1,2,3, 张 晋4, 李安春1,2, 闫吉5
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1.中国科学院海洋研究所;2.中国科学院 海洋地质与环境重点实验室;3.中国科学院大学;4.中国石油大学(华东);5.辽宁师范大
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| 摘要: |
| 为探讨北黄海表层沉积物中常量元素分布特征, 并进一步分析其控制因素和物质来源, 以常量元素为依托, 对304 个站位表层沉积物常量元素含量分布特征及控制因素进行统计分析, 结果表明:沉积物中SiO2、Al2O3、Fe2O3、MgO、K2O、P2O5、TiO2 七种元素含量的空间分布具有明显的区域性。其中, SiO2、K2O 具有相似的空间分布; Al2O3、Fe2O3、MgO、P2O5、TiO2具有相似的空间分布, 但与SiO2、K2O 的分布趋势相反; CaO、MnO、Na2O 在区域内分布较为均匀, 未显示出明显的高低变化趋势。聚类分析显示, 表层沉积物的常量元素分布主要受粒度效应的控制。主因子分析提取出3 种控制常量元素分布的主成分, 分析表明, 粒度控制效应、源区风化作用和不同物源输入是影响表层沉积物常量元素空间分布的主要因素, 贡献累计方差总和达77.12%。以K2O、CaO、TiO2为指标, 通过FD 函数识别出北黄海不同海域内的主要物质来源, 其主要物源包括黄河、鸭绿江和黄海暖流携带的长江物质。对北黄海沉积物物质来源进行分析, 不仅在海洋矿产资源勘探、航道开发、沿岸港口建设与整治等方面具有实际意义, 而且在认识海洋环境变迁等方面同样具有理论意义。 |
| 关键词: 北黄海 表层沉积物 常量元素 控制因素 |
| DOI：10.11759/hykx20131031001 |
| 分类号: |
| 基金项目:国家自然科学基金项目(41076032, 41276052) |
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| Distribution and controlling factors of the major elements in surface sediments of the North Yellow Se |
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| Abstract: |
| The distribution characteristics and controlling factors of the surface sediments obtained from 304 positions of the North Yellow Sea were analyzed. The results show that SiO2, Al2O3, Fe2O3, MgO , K2O, P2O5, and TiO2 seven elements have obvious regional distribution. The SiO2 and K2O have a similar distribution in the area. Al2O3, Fe2O3, MgO, P2O5, and TiO2 have a similar distribution in the area, which is opposite to the distribution trend of SiO2 and K2O. CaO, MnO and Na2O have no obvious change in the area. Cluster analysis shows that the major elements distributions of the surface sediments are mainly controlled by grain size effect. Three principal components that control the major elements distribution are extracted by the main factor analysis, the contribution to the total sum of variance is 77.12%, and the analysis shows that the grain size control effect, weathering of source rocks and different sources input are the main influence factors to control the distribution of the major elements of the surface sediment. K2O, CaO and TiO2 were used for indicators to identify the source materials of the North Yellow Sea by FD function. |
| Key words: the North Yellow Sea surface sediments major elements controlling fact |