Induced Polarization Surveys

Knowledge in the Field

Induced polarization (IP) surveys are used to detect disseminated mineralization and to simultaneously measure electrical resistivity. Originally developed for porphyry exploration, gold deposits also respond well to this technique since many are hosted within bodies of disseminated sulphides. Dipole-dipole surveys provide the best signal to noise ratio for detecting discrete targets but in cases where the primary voltage at the receiving electrodes is too low, pole-dipole surveys are often employed.  Gradient surveys provide much more rapid coverage but this is at the expense of target resolution.  The IP decay curve can be analysed to derive spectral IP parameters tau and C which are influenced by chargeable grain size and the type of chargeable source. 

AGL Delivers

AGL can accommodate any ground conditions, providing time and frequency domain surveys with transmitters ranging from 2 KW to 10 KW.

We use IRIS IP-6 and IP-10 receivers, providing full digital acquisition and flexible decay curve sampling for spectral IP measurements. In addition to pole-dipole, dipole-dipole and gradient array surveys, we run mise-a-la-masse and borehole IP surveys for detailing. Full-colour plotting of results is available in the field together with state-of-the-art 2D inversion using software developed by the University of British Columbia.