浅部不均匀体对目标体电阻率异常影响的研究  

A STUDY ON EFFECTS OF SHALLOW INHOMOGENEOUS BODY ON OBJECT RESISTIVITY ANOMALY

作　　者：强建科[1] 阮百尧[2] 熊彬[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,武汉430074 [2]桂林工学院资源与环境系,桂林541004

出　　处：《地球物理学报》2004年第3期542-548,共7页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目 (40 0 640 0 1 )

摘　　要：浅部不均匀体能使电阻率测深曲线产生严重的畸变 .为了从根本上消除浅部不均匀体的干扰 ,本文采用三维有限元数值模拟的方法 ,计算出浅部不均匀体异常和混合体 (目标体 +不均匀体 )异常 ,通过一定的校正方法 ,把不均匀体影响从混合异常中校正掉 。It is well known that the critical distortion to resistivity sounding curves could be produced by shallow inhomogeneous bodies. In order to eliminate this interference, this paper adopts the 3 D finite element numerical simulation method to calculate the pure anomaly caused by an inhomogeneous body at shallow depth and a mixed body (object and the inhomogeneous body) anomaly, and corrects them through other correction methods. Finally we realize the quantitative correction for the inhomogeneous body at shallow depth.

关 键 词：电阻率法 浅部不均匀体 三维有限元数值模拟 干扰校正 

分 类 号：P631.322[天文地球—地质矿产勘探]