地理科学 ›› 1996, Vol. 16 ›› Issue (4): 312-316.doi: 10.13249/j.cnki.sgs.1996.04.312

• 论文 • 上一篇    下一篇

汉水沉积物中元素的地球化学特征

闫百兴, 何岩   

  1. 中国科学院长春地理研究所, 长春130021
  • 收稿日期:1995-10-26 修回日期:1996-03-25 出版日期:1996-07-20 发布日期:1996-07-20
  • 基金资助:
    “七五”科技攻关项目“汉水水系水体环境背景值调查研究”

THE GEOCHEMICAL FEATURE OF ELEMENTS IN SEDIMENT IN THE HAN RIVER

Yan Baixing, He Yan   

  1. Changchun Institute of Geography, Academia Sinica, Changchun 130021
  • Received:1995-10-26 Revised:1996-03-25 Online:1996-07-20 Published:1996-07-20

摘要: 本文系统研究了汉水沉积物中元素的含量水平、分布、相关关系,元素含量与粒度关系及沉积物矿物组成等地球化学特征.研究结果表明:汉水沉积物中As、Pb、Cd呈富集状态,Cu、Ni、Co、Fe呈分散状态;库底沉积物中元素含量高于河底沉积物,沉积物中Cu、Cd、Zn、Ni之间及Co、Fe、Mn、Cr之间相关性较好;随粒径减小,粘土矿物所占比例呈上升趋势,碎屑矿物所占比例呈下降趋势;除Hg、Mn外,其它元素含量与一定粒径的相关性较好.

Abstract: The Han River, which is the longest tributary in the Yangtze River system, has an area of 17.4?104 km2 and originates from the south slope of the Qinling Mountains. The geochemical features of elements in sediment in the Han River are studied in a systematic way based on field investigation, sampling, analysis and measurement in laboratory. The content, distribution, variation, composition of minerals and the ralationship between element contents and the diameter of grains in sediment are thoroughly discussed. The results show that the elements of As, Pb, Cd are enriched and Cu, Ni, Co, Fe, Cr, Hg are decen-tralized in sediment. The contents of most elements in sediment in lakes are higher than those in rivers. There is a close correlation among Cu, Cd, Zn, Ni and also Co, Fe, Mn, Cr in sediment under the condition of a=0.001. The smaller the diame-ter of grains, the more the percentage of clay mineral and the less the percentage of clastic mineral. There is a better correla-tion between the content of most elements and the diameter of grains except Hg and Mn.