计算矩形大定源回线瞬变电磁测深全区视电阻率  

Computation of Whole-Time Apparent Reisistivity of Large Rectangular Loop

作　　者：张成范[1] 翁爱华[2] 孙世栋 董瑞春[2] 

机构地区：[1]吉林省有色金属地质勘查局,长春130026 [2]吉林大学地球探测科学与技术学院,长春130026 [3]中国建材工业地质勘查中心安徽总队,合肥230022

出　　处：《吉林大学学报（地球科学版）》2009年第4期755-758,共4页Journal of Jilin University：Earth Science Edition

基　　金：国家'863'计划项目(2006AA06Z109);国家自然科学基金项目(40874050)

摘　　要：介绍了矩形大定源瞬变电磁测深全区视电阻率的计算方法。根据大定源感应电动势关于电阻率非线性变化特点,利用二分法计算感应电动势的全区视电阻率。在此过程中,计算首先从早期感应电动势开始,并将计算得到的视电阻率作为下个窗口视电阻率计算的依据。以此类推,得到全部时窗的视电阻率。理论模型和实际数据的计算结果表明文中提出方法的有效性和正确性。The authors introduce a new method for computing the whole-time apparent resisitivity from the transient response generated by a large rectangular loop over the ground. In this method, bisection strategy is used to get the whole-time apparent resisitivity from the induced voltage of a uniform half space model. We start our computation in an early time window, and use the corresponding result in the second time window. This process is repeated until all the time intervals have been processed. The test on the theoretical model and real data show that the presented method is correct and effective.

关 键 词：矩形大定源 瞬变电磁测深 全区视电阻率 二分法 

分 类 号：P631.3[天文地球—地质矿产勘探]