大地电磁测深法阻抗相位的特性与应用  

CHARACTERISTICS AND APPLICATION OF IMPEDANCE PHASE BY MAGNETOTELLURIC SOUNDING

作　　者：刘建利[1,2] 

机构地区：[1]中国地质大学,北京100083 [2]陕西省地矿局物化探队,西安710043

出　　处：《陕西地质》2012年第2期56-61,67,共7页Geology of Shaanxi

基　　金：中国地质调查局西安地质调查中心"西北地区中小盆地群油气资源远景调查"项目(编号1212010733506)资助

摘　　要：从分析阻抗相位与视电阻率的关系入手,导出相位视电阻率的递推公式,对银额盆地实测大地电磁测深剖面资料进行了低频段视电阻率曲线的形态畸变校正,使视电阻率的残余静态效应得到了较好的压制,利用相位曲线的极值点准确地确定了白垩系低阻电性层的界面。From the relationship between impedance phase and apparent resistlvity, a recursion formula of phase apparent resistivity is educed and morphological distortion correction of low frequency band of apparent resistivity curve is achieved for measured magnetotellurie sounding profiles of the Yin＇ E Basin, from which residual static effects are preferably controlled on apparent resistivity. Based on the extremal point of phase curves, the interface of the low resistant electrical layers in the Cretaceous system is defined accurately.

关 键 词：大地电磁测深法 阻抗相位 视电阻率 银额盆地 

分 类 号：P631.2[天文地球—地质矿产勘探]