重磁异常解释的归一化局部波数法  

A normalized local wavenumber method for interpretation of gravity and magnetic anomalies

作　　者：马国庆[1] 黄大年[1] 李丽丽[1] 于平[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130021

出　　处：《地球物理学报》2014年第4期1300-1309,共10页Chinese Journal of Geophysics

基　　金：深部探测技术与实验研究专项SinoProbe-09-01(201011078)资助

摘　　要：局部波数法是进行重磁数据解释的常用方法之一.本文提出归一化局部波数法,该方法在不需要任何关于地质体信息的前提下能有效地完成异常的反演工作,且给出了不同归一化方式的应用效果.理论模型试验表明归一化局部波数法能准确地完成异常的反演,且通过对比发现其他归一化方式(中值、几何平均和调和平均)的计算结果相对算术平均归一化结果具有更高的分辨率.将该方法应用于实测磁异常的解释,获得了未知地质体的空间位置.Local wavenumber is one of commonly used methods in interpretation of gravity and magnetic data. In this paper, we present a normalized local wavenumber （NLW） method, which can make inversion of data for the source location parameters without any priori information about the source, and we test the application effect of this method with different normalized ways. The tests on a theoretical model show that the NLW method can finish the inversion of potential field data accurately, and the results computed by the other normalized functions （median, geometric mean and harmonic mean） have higher resolution than that by the arithmetic mean. We also apply the NLW method to real magnetic data, and obtain the location of the unknown geologic body in the subsurface.

关 键 词：重磁异常 局部波数 归一化 分辨率 

分 类 号：P631[天文地球—地质矿产勘探]