Three-dimensional tomography using high-power induced polarization with the similar central gradient array
Wang Jun-Lu1, Lin Pin-Rong1, Wang Meng2, Li Dang1, and Li Jian-Hua1
1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China.
2. China Aero Geophysics Survey & Remote Sensing Center foe Land and Resources, Beijing 100083, China.
Abstract：
Induced polarization (IP) 3D tomography with the similar central gradient array combines IP sounding and IP profiling to retrieve 3D resistivity and polarization data rapidly. The method is characterized by high spatial resolution and large probing depth. We discuss data acquisition and 3D IP imaging procedures using the central gradient array with variable electrode distances. A 3D geoelectric model was constructed and then numerically modeled. The data modeling results suggest that this method can capture the features of real geoelectric models. The method was applied to a polymetallic mine in Gansu Province. The results suggest that IP 3D tomography captures the distribution of resistivity and polarization of subsurface media, delineating the extension of abrupt interfaces, and identifies mineralization.
. Three-dimensional tomography using high-power induced polarization with the similar central gradient array[J]. APPLIED GEOPHYSICS, 2017, 14(2): 291-300.
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2017, Vol. 14 
