近区瞬变场的频率效应与大深度探测能力的研究  

FREQUENCY EFFECT OF TRANSIENT FIELD AND CAPABILITY OF GREAT DEEP EXPLORATION

作　　者：王庆乙[1] 

机构地区：[1]北京矿产地质研究院,北京100012

出　　处：《地质与勘探》2007年第1期79-83,共5页Geology and Exploration

摘　　要：在时域中,磁源近区瞬变场的时间特性取决于场源所含低频谱的分数幂。对于磁感应强度Bz(t)∝∑iω3i/2,对于感应电势εz(t)∝∑iω5i/2。这表明,现有的瞬变电磁探测系统只适用于浅部勘查,对于大深度的勘查,需要研制超强能量且轻便化的场源(发送系统),同时完善超导磁强计(接收系统)的实用化。Abstract：In time domain on the near zone of vertical magnetic source, the transient field form is decided by fractional power of the angular frequencies for field source. As regards magnetic induction intensity Bz（t）∝∑ω^3/2and electro motive force εz（t）∝∑ω^5/2.This shows the exiting transientelectromagnetic survey system is suitable for shallow ore exploration, In order to explore great deep ores, developing super - energy field source and portal ble transmitter is needed, and S. Q, U. I. D magnetometer or receiver should he practical.

关 键 词：瞬变场的频率效应 大深度探测 超强场源 超导磁强计 

分 类 号：P631.3[天文地球—地质矿产勘探]