Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring;
Ministry of Education;
School of Geosciences and Info-physics;
Central South University;
Changsha;
410083;
China;
School of Earth Science and Technology;
Southwest Petroleum University;
Chengdu;
610500;
China;
School of Earth Sciences;
Guilin University of Technology;
Guilin;
541004;
China;
Nanjing Geological Survey Center of China Geological Survey;
Nanjing;
210016;
China;
3D DC numerical simulation; a mixed space-wavenumber domain; 2D Fourier transform; contraction operator;