直流激发极化法中的视电阻率参数及二次场采样  

THE APPARENT RESISTIVITY PARAMETERS IN DIRECT CURRENT IP METHOD AND THE SECONDARY ELECTRIC FIELD SAMPLING

作　　者：赵聚林[1] 薛斌义[1] 冯军[1] 何海军[1] 

机构地区：[1]甘肃省地质调查院,甘肃兰州730000

出　　处：《物探与化探》2009年第1期46-48,共3页Geophysical and Geochemical Exploration

摘　　要：目前的直流激发极化法仪器,一次场采集于供电方波的末端时间,包含了被激发形成的二次场,在高极化率地质体上,仪器反映的视电阻率将削弱其低阻特性或放大高阻特性。以甘肃北山地区某铜铁矿测量为例,说明在野外工作中,做适当的数据处理,可降低这种影响。In the direct current IP instrument used at present, the terminal time of the power supply square wave of the primary electric field sampling contains the secondary electric field formed by induction. In the high polarizability geological body, the apparent resistivity reflected by the instrument will weaken its low resistivity or enlarge its high resistivity characteristics. In field work, therefore, prop- er data-processing should be conducted so as to reduce such influence.

关 键 词：直流激发极化法 一次场 二次场 视电阻率 

分 类 号：P631[天文地球—地质矿产勘探]