Induced polarization (IP) method is used to detect mineralization prospect and to simultaneously measure electrical resistivity. This method is originally developed for porphyry exploration, also gives well respond to determine gold deposits. Dipole-dipole survey produces the best signal for noise ratio to detect discrete targets. The case when primary voltage at the receiving electrode is too low, pole-dipole survey is often employed.
Gradient surveys provide much more rapid coverage but less in target resolution. The IP decay curve can be analysed to derive spectral IP parameters which are influenced by chargeable grain size and the type of chargeable source. IP method can be implemented on any ground conditions, providing time and frequency domain surveys with transmitters range from 110 – 115 kV.
Instruments that we use are Zonge IP System and Ares IP/Resistivity meter, providing full digital acquisition and flexible decay curve sampling for spectral IP measurements. In additional for dipole-dipole and gradient array survey, we also run mise-a-la-masse and IP survey to obtain more detailed information. Full-colour plotting of results is produced in the field together with using of state-of-the-art 2D inversion software.
