起伏面磁場及其梯度張量快速三維正演方法

作者：李昆,陳龍偉,陳輕蕊,戴世坤,張錢江,趙東東,凌嘉宣

摘要：Magnetic field gradient tensor technique provides abundant data for delicate inversion of subsurface magnetic susceptibility distribution.Large scale magnetic data inversion imaging requires high speed and accuracy for forward modeling.For arbitrarily distributed susceptibility data on an undulated surface,we propose a fast 3D forward modeling method in the wavenumber domain based on(1)the wavenumber-domain expression of the prism combination model and the Gauss–FFT algorithm and(2)cubic spline interpolation.We apply the proposed 3D forward modeling method to synthetic data and use weighting coefficients in the wavenumber domain to improve the modeling for multiple observation surfaces,and also demonstrate the accuracy and effi ciency of the proposed method.

發文機構：Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education School of Geosciences and Info-Physics of Central South University School of College of Earth Sciences of Guilin University of Technology

關鍵詞：UndulatedsurfacemagneticfieldgradientTENSOR3DFORWARDmodelingGauss–FFTalgorithmWAVENUMBERdomain

分類號： O189.1[理學—數學][理學—基礎數學]