| As an important branch of electrical prospecting, induced polarization method has a superior performance in the exploration of Active Interface dye-like metal ore. Due to the electric current is decay with depth exponentially, accompanied with the limitation of acquisition devices’ resolution and the interference of noises during measurement, the decreasing of data resolution is avoidably. This decreasing, along with depth, cannot overcome by changing the arrangement of potential of the electrode and the current electrode on ground. The only way to solve this problem,to increase both horizontal resolution and vertical resolution greatly, is to put the potential of the electrode or the current electrode under the ground, which means closer to the anomaly. Based on this principle, this thesis conducted types of tests of apparatus borehole induced polarization and the inversion results have been able to characterize the abnormal morphology underground, providing a better achievement for geological exploration.This thesis analyzed the performance of common induced polarization devices and picked suitable devices for further research from physical model experiments, analyzed the effects of various types of acquisition equipments by set different electrical parameters and compared differences between borehole acquisition equipments and surface acquisition equipments.This thesis analyzed how to arrange bilateral three-pole field experiment preferably from field exploration, analyzed the main reason to cause negative apparent polarization and how to use this negative apparent polarization to make geological interpretation form exploration cases.Finally, this thesis used varieties of borehole induced polarization polymetallic equipments to explore a mine field. By processed and analyzed the data, this thesis compared the results of bilateral three-pole, surface-to-bore, bore-to-surface,bore-to-bore,found these results fit for each other very well. |
PDF Full Text Request