冲积平原区重金属元素异常解析中的矿物学方法

Mineralogical methods in the analysis of heavy metal anomalies in alluvial plains

冲积平原区生态地球化学调查方法技术研究中矿物鉴定和化学分析结果对比研究表明 ,土壤中化学元素的含量及其分布特征主要取决于土壤对成壤母质中各种矿物成分的继承 ,元素的区域地球化学背景差异和在不同深度的含量变化均可通过矿物和矿物组合特征较为直接地示踪显现 ,土壤中矿物组成对其化学元素含量的影响是直接的、决定性的。因此 ,利用土壤的矿物组成确定其常量和微量元素的初始值具有重要意义。据此可进一步解析土壤中元素地球化学异常成因 。

Researches on the ecological geochemical surveying method in alluvial plains of China show that the contents and characteristic distribution of elements are determined by inherited mineral assemblages in soil. The differences in regional geochemical backgrounds of elements and in their contents at different depths are shown evidently by minerals and mineral assemblages. The mineral assemblage in soil directly determines the content of elements. Therefore, the application of the mineral assemblage in soil to determination of the initial values of major elements and microelements is of great significance. The result can determine the cause of geochemical anomalies and distinguish the types of geochemical anomalies.