【摘要】 对千岛湖87件表层沉积物的25项元素(指标)进行含量测定及R型因子分析,探讨了元素(指标)的来源和分布特征。结果表明:千岛湖表层沉积物以低I、Ca O、MgO,高Cd、Hg、N、S、Se、Corg(有机碳)等为特征。在查明表层沉积物地球化学特征的基础上,采用因子分析法对千岛湖表层沉积物地球化学特征的成因进行了详细分析,共提取了6个主成分因子,累积贡献率达到78. 735%;农业生产、工业废物、生物作用及自然作用是影响表层沉积物地球化学特征的成因的主要因子。更多还原

【Abstract】 The contents of 25 elements( indicators) in 87 surface sediments of Qiandao Lake were determined and R-factor analysis was carried out. The source and distribution characteristics of elements( indicators) were discussed. The results show that the surface sediments of Qiandao Lake are characterized by low I,CaO,MgO and high Cd,Hg,N,S,Se and Corg. On the basis of understanding the geochemical characteristics of surface sediments,the factor analysis method was used to analyze the causes of the geochemical characteristics of surface sediments in Qiandao Lake. Six principal components were extracted,and the cumulative contribution rate reached 78. 735%. Agricultural production,industrial waste,biological and natural processes were the main factors affecting the geochemical characteristics of surface sediments.更多还原