磁场总梯度切线法反演二维磁性体的参数  

THE INVERSION OF TWO-DIMENSIONAL MAGNETICBODY BY THE TANGENTIAL METHOD FOR TOTALGRADIENT OF MAGNETIC FIELD

作　　者：徐世浙[1] 蔡振京[2] 倪逸[3] 

机构地区：[1]青岛海洋大学 [2]地矿部航空物探遥感中心 [3]中国石油天然气总公司物探局解释中心

出　　处：《物探与化探》1991年第5期330-339,共10页Geophysical and Geochemical Exploration

摘　　要：将实测的T异常，转换成总梯度异常，我们称之为TT异常。文中介绍的板状体的TT异常具有许多特点：1）与磁化方向无关；2）与地磁场倾角无关；3）曲线形态简单，近似对称；4）横向分辩率高。我们用切线法对TT曲线反演求板状体的顶面深度和磁化强度。在TT曲线上，切线法的截距与板状体顶深的关系文中作了详尽讨论并绘出了误差范围。本方法的计算速度比较快，对于一条500个点左右的剖面，用AT级微机反演深度的时间约为15秒。: The observed anomaly T is converted into the total gradient anomaly which we call TT anomaly. The TT anomaly caused by a plate is characterized by 1) being independent of magnetization direction; 2) having nothing to do with dip angle of the georuagnetic field; 3) simplicity in shape of curve, i. e. nearly symmetrical; and 4) high lateral discriminability. Making inversion of TT curve with the tangential method, we evaluated the top depth and magne- tization intensity of the plate. The relationship between the intercept of the tangential method and the top depth of the plate on TT curve is discussed in detail with the error range given. The computation speed of this method is rather high: it takes only 15 seconds to invert a profile of 500 points on an AT personal computer.

关 键 词：磁场 总梯度 反演 二维 磁性体 

分 类 号：P631.2[天文地球—地质矿产勘探]