(乌梁素海湖泊沉积物地球化学背景特征.docVIP

内蒙古乌梁素海湖泊地球化学特征与初步评价 王喜宽1，2 ，朱锁3 ，赵锁志1，2，张青2 ， 李世宝2，苏美霞2 (1．中国地质大学（北京），北京，100083；2.内蒙古自治区地质调查院,内蒙古，呼和浩特，010020；3.内蒙古国土资源勘查开发院，内蒙古，呼和浩特，010020) 摘要:通过对内蒙古乌梁素海表层沉积物和深层沉积物的研究分析，对乌梁素海的湖泊沉积物特征有了明确的了解。乌梁素海深层沉积物中各元素与河套平原深层土壤中基本一致，而表层沉积物中各元素则具有明显的特征。表层湖泊沉积物中主要富集Cl、Cd、S、F、Sb、C、Bi、As、Li、MgO、CaO、Cu、Ni、Sn、W、Zn、Co、Mo、Au、Sc、Tl、Hg、I、Mn、U、Ce、La、Be、Se、Th等。湖泊表层沉积物与深层沉积物相比，在表层富集S、org_C、N、Se、I、Br、Sr、C、U、Mo、Cl、CaO、Hg、P。在湖泊表层富集上述元素说明了黏土极易吸附这些元素，有些元素的富集主要是由于人类活动造成的结果。同时在表层土壤中pH值明显低于深层土壤，也明显低于河套地区的土壤pH值，这与工业排放等人类活动紧密相关。垂直剖面结果也表明，人类活动对湖泊环境造成了严重影响。乌梁素海已出现富营养化和Hg、F污染，需对其进行治理。 关键字:乌梁素海；生态地球化学；沉积物；河套地区 中图分类号: 文献标识码: Prerequisite Assessment on the Geochemistric Characteristicts of Wuliangshuhai Lake in Inner Mongolia WANG xi-kuan1,2, ZHU suo3，ZhAO shuo-zhi1，ZHANG qing1, LI shi-bao1，SHU mei-xia1 (1. China University of Geosciences,Beijing,100083,China；2．Institute of Inner Mongolia Autonomous region geological survey, Inner Mongolia,Huhhot,010020；3．Institute of Inner Mongolia land resource survey and exploitation, Inner Mongolia,Huhhot,010020) Abstract:By analyse the surface and the deep layer sediments of the Wuliangshuhai Lake, the sediment characteristic of the Wuliangshuhai Lake is discovered.Every element in the deep sediment of the Wuliangshuhai Lake is basic identical with the deep soil in Hetao area,and there are distinctness characteristic in the surface sediment. It is discovered that the surface sediment enrichment Cl、Cd、S、F、Sb、C、Bi、As、Li、MgO、CaO、Cu、Ni、Sn、W、Zn、Co、Mo、Au、Sc、Tl、Hg、I、Mn、U、Ce、La、Be、Se、Th,etc. Compare with the deep sediment,the surface sediment are enrichment S、org_C、N、Se、I、Br、Sr、C、U、Mo、Cl、CaO、Hg、P.It is explained that clay is very easy to adsorb these elements. The result of some elements enrichment was arosed by human activities.The value of the pH in the surface layer is lower than the deep layer,and is lower than the soil in the Hetao area.This was caused by the let of the human industry activities. The results of the vertical section chart i