Airborne IP driven exploration for a green-field research project

When collected over a chargeable ground, the inductive measurements are sensitive to Induced Polarization (IP) effects. Given this, using a frequency-dependent resistivity for modelling the EM data allows to retrieve the ground chargeability and to avoid artifacts in the inverted model-space. With this contribute we propose a case study for which the airborne chargeability has been actively used to drive the exploration in a green-field environment and to design the ground follow-up for geophysical measurements. For this project, two airborne surveys with different base frequencies have been designed to maximize the AIP content in the EM signal and a modelling approach that aims to increase the airborne chargeability sensitivity in depth has been applied to the data. Based on the retrieved models and on their integration with the ancillary information, two ground DCIP lines has been acquired and then overlapped by four ground TEM and two Loupe EM lines. With this contribute we thus have a twofold intent: we aim to increase the targeting efficacy (and to reduce risks) of the exploration effectively using the large-scale airborne chargeability information and to explore the IP effects in inductive measurements from a multi-frequencies and multi-instrument perspectives.