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《Progress in Geophysics》 2016-02
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Magnetic source transient electromagnetic measured data processing based on the simulating magnetotelluric 2D inversion technique

HAN Zi-qiang;YUAN Hong-liang;HE Shi-ming;FENG Bing;China Merchants Chongqing Communication Technology Research & Design Institute Co. ,LTD.;Country mountain area highway engineering technology research center;National engineering laboratory of highway tunnel construction technology;School of Geology Engineering and Geomatics,Chang’an University;Geophysical & Geochemical Exploration Team,Shanxi Geological Prospecting Bureau;  
Firstly the magnetic source transient electromagnetic method( TEM) simulating magnetotelluric method( MT) 2D inversion technique is introduced. Summing up a set of magnetic source TEM measured data processing based on the simulating MT2 D inversion technique,and the critical processes are discussed in detail. Magnetic source TEM observation data of a mining area in Shanxi is processed by simulating MT 2D inversion,the results show that in the inversion results, anomalies are depicted more meticulous,reflecting the near-surface low resistivity anomalies,range of deep low resistivity anomalies are more concentrated,inversion results are better than the apparent resistivity pseudo section results; According to 15,17 and 19 lines joint inversion results,two fractures F and F12 are concluded,fracture F12 is consistent with the known fracture of formation lithology interface,on the basis dividing the stratigraphic distribution of exploration area; combining with the rock ore electrical characteristics,metallogenic tectonic characteristics and scope of geochemical anomalies,concluding that the low resistivity anomalies in inversion results may be associated with mineralization, providing the geophysical basis for further geological drilling. Finally using simulating MT 2D inversion method to realize the magnetic source TEM measured data 2D inversion interpretation which has obtained the good geological effect,it is concluded that the magnetic source TEM simulating MT 2D inversion technique can be used in the actual data processing.
【CateGory Index】: P631.325
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