回线源瞬变电磁水平分量对薄层的分辨能力  

Distinguishing ability to thin layer of loop-source TEM horizontal components

作　　者：周楠楠[1] 薛国强[1] 李海[1] 

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2014年第5期2347-2355,共9页Progress in Geophysics

基　　金：国家重点基础研究发展计划(973计划)(2012CB416605);国家自然科学基金(41174090);国家重大科研装备研制项目"深部资源探测核心装备研发"(ZDYZ2012-1)-05子项目"多通道大功率电法勘探仪"-04课题"M-TEM资料处理及偏移成像软件研制"联合资助

摘　　要：为了研究矩形回线源瞬变电磁水平分量响应特征,对瞬变电磁各分量对薄层分辨能力进行了比较.根据回线源瞬变电磁的水平电场、磁场分量的计算公式,设计不同的地电模型,对比薄层存在与不存在的瞬态响应的相对误差.计算结果表明,水平磁场分量对薄层的分辨能力最强,水平电场分量次之,垂直磁场分量最弱.模型计算及实际测试表明使用水平分量有利于进一步提高对薄层的解释精度.In order to research on the response of horizontal component of transient electromagnetic field, this paper developed the comparison research of different components of TEM to thin layer.Based on the calculation equation for horizontal electric and magnetic field of loop source,different geo-electric models are designed and the response with a thin layer is compared to that homogeneous half-space.It is deduced that the resolution of horizontal magnetic field to thin layer is best,horizontal electric field takes second place,vertical magnetic field is worst.It is shown that the interpretation accuracy will be improved using horizontal components.

关 键 词：水平分量 薄层 分辨 矩形回线源 

分 类 号：P631[天文地球—地质矿产勘探]