基于等效磁偶极子的定源回线瞬变响应计算方法及视电阻率定义  

Calculation of fixed TEM response and apparent resistivity based on equivalent magnetic dipole

作　　者：武军杰[1] 张杰[1] 王兴春[1] 邓晓红[1] 杨毅[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《煤田地质与勘探》2013年第3期68-71,共4页Coal Geology & Exploration

基　　金：国土资源部国家危机矿山接替资源勘查专项(200699066);国土资源部公益性行业科研专项(200911017)

摘　　要：为求解定源回线内不同位置瞬变电磁响应表达式,提出了将发射源进行分解,等效为不同位置多个垂直磁偶极子,对各垂直磁偶极子源产生的响应进行叠加来获得定源回线的瞬变响应。完成了定源回线内任意点的场值计算,获得了定源回线装置垂直分量瞬变响应值,给出了定源回线装置下的全区视电阻率定义,并在理论模型条件下进行了计算验证。该方法计算速度快,精度高,能够满足计算要求。In order to solve the problem of expression of TEM response and definition of apparent resistivity at dif- ferent station in the fixed-loop, the TEM response expression is given in this paper. The transmitting loop can be equivalent as some vertical magnetic dipoles, and the TEM response of fixed-loop is calculated as the sum of re- sponse of each vertical magnetic dipole. The response value of any point in the loop was calculated and the appar- ent resistivity expression was obtained. It was proved in calculation with half-space and 1D layered models. This research has theoretic and application significance.

关 键 词：瞬变电磁 定源回线装置 视电阻率 磁偶极子 

分 类 号：P631[天文地球—地质矿产勘探]