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《Progress in Geophysics》 2013-03
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Research on effect of acquisition parameters on audio-frequency magnetotelluric 2D inversion results using nonlinear conjugate gradients algorithm

YANG Cheng-zhi,DENG Ju-zhi*,CHEN Hui(Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National Defense.East China Institute of Technology,Fuzhou 344000,China)  
Nonlinear conjugate gradients algorithm(NLCG) is a widespread and effective method of Audio-frequency Magnetotelluric(AMT) 2D inversion in practice.This paper carried out the research on effect of acquisition parameters(length of survey line;station distance;frequency points) on AMT 2D inversion results based on NLCG theory and algorithm which Rodi(2001) published.Through the test of typical low resistivity body,the results show that setup of AMT acquisition parameters is based on the scale,exploration depth and background resistivity of the goal body,and length of survey line is two times as the width and exploration depth of the goal body at least and it is more than three times number of survey station above abnormal body and frequency points in the range of exploration depth.
【Fund】: 国家自然科学基金(41164003);; 国家科技支撑计划(2011BAB04B03);; 江西省青年科学家培养计划联合资助
【CateGory Index】: P631.325
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