摘要
以地电化学成晕理论为基础,阐述了土壤电导率异常形成的基本原理、形成过程及组成电导率异常的离子成分特征。根据国内外不同地区和矿区土壤中可溶性离子及土壤电导率的测试结果,给出了电导率异常与土壤中离子组分的相关性,建立了土壤电导率异常形成的理想模式。研究结果表明,电导率异常的形成并非是一个简单的次生地球化学异常的转化过程,从矿体溶解到各种成晕离子转化成为电导率异常,要经过以地电化学作用为主的4个物理化学过程;电导率异常这个物理参数,反映的是各种地球化学成分,并且受一套固定的离子群所控制。
On the basis of the theory of electrochemical halo the basic principleand the process of the formation of conductivity anomaly in soilcoverand ionic composition characteristics composing conductivity anomaly areexplained. Based on tested results of soluble ions in soilcovel and soilconductivity at home and abroad, the correlation of conductivity anomalywith the ionic composition is given and the theoretical model of theformation of conductivity anomaly in soilcover is set up. Research resultsshow that the formation of conductivity anomaly is not asimple transfomationprocess of secondary geochemical anomaly. Conductivity anomaly formedby transformation from the solution of orebody into various kinds of halo-forming ions goes throuth four physicochemical processes. Conductivityanomaly, as a physical parameter, essentially reflects various chemicalcompositions and is controlled by a suit of fixed ionic groups.
关键词
土壤
电导率
异常
形成机理
soil
conductivity anomaly
theoretical model
geochemical exploration
