利用复电阻率(CR)法多参数区分金属矿异常和碳质干扰异常的探索与实践  

Exploration and practice of using multiple parameters of complex resistivity(CR)method to distinguish metal ore anomalies from carbonaceous interference anomalies

作　　者：杨志成[1] 张丽[1] YANG Zhicheng;ZHANG Li(Institute of Exploration Technology of Anhui Province,Hefei,Anhui 230031,China)

机构地区：[1]安徽省勘查技术院,安徽合肥230031

出　　处：《安徽地质》2024年第1期36-42,共7页Geology of Anhui

基　　金：自然资源部2023年度行业标准制修定项目“复电阻率法技术规程制定”(标准编号:202313005)资助。

摘　　要：安徽省勘查技术院(原地质矿产部第一综合物探大队)20世纪80年代引进频谱激电法仪器设备,开展了大量的水槽模型和物性标本研究工作,利用复电阻率多参数区分不同极化物质属性进行了长期研究和探索,总结了不同极化物质的复电阻率参数随着体积含量、颗粒、形状、产状变化的规律,以及相同极化物质的复电阻率参数随着装置、埋深、测量位置变化的规律,特别是在利用复电阻率时间常数参数区分和识别碳质异常方面取得了积极进展,并在内蒙古种蓄场勘查项目中得到验证。本文通过大量的物性研究及勘查实践表明,不同的极化物质复电阻率参数存在规律性差异,利用复电阻率多参数综合定性解释区分金属矿异常和碳质干扰异常是可行的,对其他地区激电异常的定性解释具有较高的借鉴和参考意义。In the 1980s,Institute of Exploration Technology ofAnhui Province(originally the First Comprehensive Geophysical Exploration Team of the Ministry of Geology and Mineral Resources)introduced spectral IP instruments to carry out a lot of research work on water tank modeling and physical-property specimens,including long-term exploration on the use of complex-resistivity multiple parameters to distinguish the properties of different polarized materials,summarized the law of changes of complex-resistivity parameters of different polarized materials with their volumetric content,particle size,shape and occurrence,and the changes of complex-resistivity parameters of same polarized materials with the device,burial depth and measurement position.In particular,positive progress has been made in the use of the complex-resistivity time constant parameter to distinguish and identify carbonaceous anomalies.It has been verified in an exploration project at a livestock breeding station in the Inner Mongolia.In this paper,a large number of physical-property research results and an exploration practice show that there are regular differences in complex-resistivity parameters for different polarized materials,and it is feasible to distinguish metal ore anomalies from carbonaceous interference anomalies by using complex-resistivity multi-parameter comprehensive qualitative interpretation,which has high reference values for qualitative interpretation of IP anomalies in other areas.

关 键 词：复电祖率(CR)法 金属矿 石墨 激电异常 时间常数 

分 类 号：P631[天文地球—地质矿产勘探]