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《Journal of Chang'an University Earth Science Edition》 1989-04
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SOME PROBLEMS OF CALCULATING TOP AND BOTTOM OF MAGNETIC BODIES BY POWER SPECTRUM METHOD

Wang Xiwen (Xi'an College of Geology)  
The power spectrum method is one of the common inversing methods by means of which the top depth and the bottom depth of the magnetic bodies can be calculated.This method is simple and the calculation speed is also fast. Furthermore, there is no need to foresee the susceptibility of the magnetic bodies.Therefore, the method is of a certain practical value. Based on the studies made by the predecessors, the writer discusses in detail some problems which are met with in his practically processing data.With the help of the studies, he comes to a conclusion that the precision of calculating of the top depth of the magnetic bodies is much higher and much more reliable than by calculating the bottom depth in terms of analysing errors. Considering the susceptiblity of the magnetic bodies is inhomogeneous from the top of the magnetic bodies to their bottom, the author infers the spectrum formula of the inhomogeneous susceptibility of the megnetic bodies. And he considers that this spectrum is approximately to similar that of the homogeneous susceptibility of the magnetic bodies. The results show that the calculation of the top depth and the bottom depth of the magnetic bodies by the power Spectrum Method is not affected, by the inhomogeneous susceptibility of the magnetic bodies.The approximate Calculation of the 3-D magnetic bodies by the 2-D Power Spectrum Method is of good precision. Finally, the author calculates the top depth of the magnetic bodies of the Taiyuan Basin in Shanxi province, and the results are in line with the known geological and geophysical data.
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【References】
Chinese Journal Full-text Database 1 Hits
1 Wang Xiwen ( Northwestern Petroleum Geology Institute );CALCULATION OF SHANXI CURIE ISOTHERM WITH AEROMAGNETIC ANOMALIES[J];Journal of Earth Science and Enivronmental;1991-03
【Citations】
Chinese Journal Full-text Database 2 Hits
1 Hou Chongchu and Li Baoguo(Beijing Computer Center, Ministry of Geology and Mineral Resources);POWER SPECTRUM METHODS FOR DIRECT ESTIMATING THE DEPTH TO THE BOTTOM OF MAGNETIC SOURCE[J];Computing Techniques for Geophysical and Geochemical Exploration;1985-03
2 Hou Chongchu;Li Baoguo Beijing Computer Center, Ministry of Geology and Mineral Resources;POWER SPECTRUM METHODS FOR ESTIMATING THE DEPTHS TO THE TOP AND THE BOTTOM OF MAGNETIC SOURCE[J];Computing Techniques for Geophysical and Geochemical Exploration;1985-04
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 HuYaofeng;Zhao Lianfu;Nu Xue;Dong Baozhong Seismolgical Brigade of Liaoning province 11012;JUDGE MAIN FAULTS BY AEROMAGNETIC DATA IN THE SOUTH OF NORTHEAST CHINA[J];Seismological Research of Northeast China;1992-04
2 ZHANG Chang da(Department of Geophysics, China University of Geoscie+nces, Wuhan 430074,China);Deduction of magnetic characteristics of lithosphere in China from results on satellite and aeromagnetic measurements[J];Progress In Geophysics;2003-01
3 Hou CHONG-CHU LI BAO-GUO (Beijing Computer Center, Ministry of Geology and Mineral Resources);ESTIMATING DEPTHS AND THICKNESS OF ROCK STRATUM BY USING THE POWER SPECTRA OF POTENTIAL FIELDS AND THEIR DERIVATIVES OF DIFFERENT ORDER[J];Chinese Journal of Geophysics;1988-01
4 Yu Qinfan Lou Hai(China Univvrsity of Geoscience, Beijing)Sun Yunsheng, Li Qingxuan, Lu Qiugtian(Changchun College of Geology);THE MAGNETIC STRUCTURE OF GEOSCIENCE TRANSECT FROM YADONG TO GOLMUD[J];;1990-02
5 Wu Gang(Center for Earthguake Analysis and Prediction, State Seismological Bureau, Beijing 100036) Yu Qin-fan (China University of Geosciences, Beijing 100083);CHARACTERISTICS OF THE STRUCTURE OF MAGNETIC LAYER IN THE NORTH-SOUTH SEISMIC BELT IN CHINA[J];Seismology and Geology;1990-03
6 Chen Shengzao (Institute of Geophysics, State Seismological Bureau, Beijing);GEOPHYSICAL AND GEOLOGICAL FEATURES OF THE MESOCENOZOIC LOWER YANGTZE RIFT ZONE[J];Acta Geological Sinica;1990-02
7 Wu Gang (Center for Analysis and Prediction, SSB);CORRELATION ANALYSIS BETWEEN PRECAMBRIANBASEMENT STRUCTURE AND SEISMICITY INYUNNAN-SICHUAN AREA[J];Journal of Seismological Research;1993-04
8 Huang Qixun (No 2 Hydrogeological and Engineering Geological Team ofGuangxi);THE FUCTION OF GRAVITATIONAL GEOMAGNETIC DATA FOR PROBING INTO THE DISTRIBUTION OF EARTHQUAKE IN GUANGXI[J];;1990-01
9 Zhang Peiqin, Zhu Zhaofang(Aerogeophysical Remote Sensing, Ministry of Geology and Mineral Resources);THE METHOD FOR CALCULATING THE DEPTH OFMAGNETIC BODY ON THE BASIS OF MAXIMUM ENTROPYPOWER SPECTRUM AND ITS APPLCATION[J];Geophysical and Geochemical Exploration;1989-01
10 Shen Ninghua(Changchun College of Geology);SCIENTIFIC AND TECHNICAL ADVANCES IN MAGNETICPROSPECTING[J];Geophysical and Geochemical Exploration;1989-05
【Co-references】
Chinese Journal Full-text Database 1 Hits
1 Wang Xiwen ( Xi'an College of Geology );SOME PROBLEMS ON CALCULATING THE CENTROID OF MAGNETIC BODIES[J];Journal of Chang'an University Earth Science Edition;1989-01
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 Guo Wanwu Xiang Guangzhong Lu Dehui Hu Cunde Wang Jianrui(Seismological Institute of Lanzhou, SSB, Lanzhou);BRIEFLY ANALYZING THE ACTION OF UPLIFT AND HOLLOW IN THE CRUST ON SEISMIC ACTIVITY[J];Inland Earthquake;1993-01
【Secondary Citations】
Chinese Journal Full-text Database 2 Hits
1 Mu ShiminYe shuisheng;PROBLEMS ON DEPTH ESTIMATION BY POWERSPECTRUM[J];;1982-02
2 HAO SHU-JIAN GAO HUA-GEN WANG CIIUN-HUA (Institute of Geology, State Seismological Bureau);ISOTHERMAL SURFACE OF CURIE TEMPERATURE AROUND THE BEIJING AREA AND ITS RELATION TO EARTHQUAKES[J];Chinese Journal of Geophysics;1982-03
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