物探与化探2016，Vol.40Issue(1)：104-110,7.DOI:10.11720/wtyht.2016.1.19
对多段线MT二维反演方法的一种改进
An improved method for MT two-dimensional inversion of polylines profile
摘要
Abstract
For MT two-dimensional inversion of polylines profile, researchers usually use a separate profile inversion for each measured line profile, or conduct profile inversion with the type of "polylines bending straightening". The former of segmented inversion can't make the inversion results stitch up perfectly due to the boundary effect, and the latter inversion results can not reflect the true length of the measured profile, so that both situations affect interpretation work. The authors thus propose an improved method for two-dimen-sional polylines MT inversion. Firstly, a measured profile orientation is chosen as the fixed orientation of the MT two-dimensional inver-sion ( usually, it is the longest one) , the distance Li between each points is calculated on the adjacent measured profiles and the in-flection point nearby, then the coordinate of measured points is rotated in a distance Li . In this way, the measuring points will be nor-malized to the original fixed orientation of the measured line, with progressively analogy. Finally, the two-dimensional inversion can be conducted for the new profile data. Based on applying this improved method, the comparative analysis of forward and inversion in differ-ent polarization modes and the verification results of measured data, the authors hold that this method can effectively resolve the prob-lem of the influence of the boundary effect in the stitching position of MT two-dimensional inversion and can also reflect the maximum possible extent of the true length of the measured profile, thus improving the reliability of the inversion results and helping later compre-hensive interpretation.关键词
多段线/MT/极化模式/二维反演/边界效应Key words
polylines/MT/polarization mode/two-dimensional inversion/boundary effect分类
天文与地球科学引用本文复制引用
张小博,钟清,方慧,仇根根,李晓昌,何梅兴,袁永真,张鹏辉..对多段线MT二维反演方法的一种改进[J].物探与化探,2016,40(1):104-110,7.基金项目
中国地质调查局地质调查项目(1212011120971,12120114005002) （1212011120971,12120114005002）
国家"深部探测技术与实验研究"专项(SinoProbe-01-04) （SinoProbe-01-04）
