安徽黟县富硒土壤地球化学特征研究  

Geochemical characteristics of selenium-rich soils in Yixian County,Anhui Province

作　　者：王敏 徐生发[1] WANG Min;XU Sheng-fa(No.332 Unit,Bureau of Geology and Mineral Exploration of Anhui Province,Huangshan,Anhui 245000,China)

机构地区：[1]安徽省地质矿产勘查局332地质队,安徽黄山245000

出　　处：《安徽地质》2022年第1期44-47,共4页Geology of Anhui

基　　金：安徽省公益性地质调查项目“安徽省黟县土地质量地球化学调查与富硒资源评价”(编号:2016-g-3-38)资助。

摘　　要：通过开展黟县土地质量地球化学调查与富硒资源评价,查明黟县表层土壤硒元素平均值为0.523mg/kg,高于富硒土壤标准,相对于全国及安徽省江淮流域硒含量表现为富集特征;参照《天然富硒土地划定与标识》(试行)(DD 2019—10)圈定富硒土壤168.61km^(2),占调查区总面积的20.94%。通过分析硒元素在不同土壤类型及成土母质的分布特征,认为区内富硒土壤成因可分为两大类:(1)硒高背景岩石风化形成的富硒土壤;(2)土壤黏土矿物及有机质表层次生富集作用形成的富硒土壤。Through the land quality geochemical investigation and selenium-rich resource evaluation in Yixian County,it was found that the average value of selenium in the topsoil of Yixian County was 0.523mg/kg, higher than the standard for selenium-rich soil, and selenium is enriched compared with the whole country and the Yangtze-Huaihe River Basin of Anhui Province. An area of 354.01km^(2)of selenium-rich soil was delineated according to the "Demarcation and Identification of Natural Selenium-rich Land "(Trial)(DD2019-10),covering 20.94% of the total surveyed area. By analyzing features of distribution of selenium in different soil types and parent materials, it is concluded that the selenium-rich soils in the area can be divided into two types: 1) selenium-rich soil formed from rocks with high selenium background value by weathering;2) seleniumrich soilformed from clay minerals and organic matter by epigenetic enrichment in soil.

关 键 词：黟县 富硒土壤 地球化学特征 

分 类 号：P595[天文地球—地球化学]