四川省沐川县北部土壤硒地球化学特征与成因探讨  

Geochemical characteristics and genesis of selenium in soilin northern Muchuan County, Sichuan Province

作　　者：韩伟[1,2,3] 王乔林 宋云涛[1,2,3] 彭敏 王成文[1,2,3] HAN Wei;WANG Qiao-Lin;SONG Yun-Tao;PENG Min;WANG Cheng-Wen(Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China;Research Center of Geochemical Survey and Assessment on Land Quality,CGS,Langfang 065000,China;Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone,CAGS,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]中国地质调查局土地质量地球化学调查评价研究中心,河北廊坊065000 [3]中国地质科学院地球表层碳—汞地球化学循环重点实验室,河北廊坊065000

出　　处：《物探与化探》2021年第1期215-222,共8页Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质调查项目(DD20190522)。

摘　　要：通过对四川省沐川县北部土地质量地球化学调查,查明了工作区土壤Se的地球化学特征,并对其成因进行了初步研究。结果表明,工作区土壤Se含量范围为0.06×10-6~1.49×10-6,平均值为0.41×10-6,主要以富硒土壤为主,满足富硒土壤条件的土壤面积占工作区总面积的60%。不同成土母岩中土壤Se含量差异较大,趋于表层富集,成土母岩为香溪群的土壤中Se含量较高,且重金属含量低;不同土地利用类型中,林地土壤Se含量最高;不同土壤类型中Se含量差异较小。相关分析表明,土壤Se含量与有机质、Pb、As、Cd等呈显著正相关,不同成土母岩对Se含量与pH值的相关性影响较大,表明成土母岩、有机质、重金属元素是影响该区土壤中Se含量的主要因素。Based on geochemical investigation of land quality in northern Muchuan County of Sichuan Province,the authors identified the geochemical characteristics of Se element in the soil of the working area and carried out a study of its causes.The results show that the Se content of the soil in the working area ranges from 0.06×10-6 to 1.49×10-6,with an average value of 0.41×10-6.It is mainly dominated by selenium-enriched soil,which satisfies the conditions of selenium-enriched soil and possesses 60%of the whole working area.The content of Se in different parent rocks is quite different and tends to be enriched in the surface layer.The content of Se in soils with Xiangxi Group as the parent rock is higher but the content of heavy metals is lower;the content of Se is the highest in forest land in different land use types;the difference in content of Se in different soil types is relatively small.Correlation analysis shows that the Se content of the soil is significantly positively correlated with SOM,Pb,As,Cd,etc.Different parent rocks have a greater influence on the correlation between Se content and pH,indicating that the main factors of Se content in soil are parent rocks,SOM and heavy metal elements in the working area.

关 键 词：土壤Se含量 地球化学特征 成因分析 香溪群 沐川县 

分 类 号：P632[天文地球—地质矿产勘探]