Modelling an Airborne Time-Domain Electromagnetic (TDEM) System using a Novel Integral Formulation

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Time-Domain Electromagnetic (TDEM) systems are instruments designed to detect electromagnetic fields andare used, among other applications, to measure weak signals generated by mineral deposits found deep withinthe Earth's shell. This detection is achieved by emitting very intense time-varying electromagnetic fields thatinteract with these deposits. In turn, the soil's electromagnetic response induces, within a detection device,signals that are greater than the background or instrumentation noise. Therefore, they can be used by the miningindustry as a fingerprint of the nature and quantity of minerals. That being said, it is obvious that in order toproperly interpret the data, a physically-coherent model must be employed. In the context of this proposal, anovel integral method will be used to model the electromagnetic response of mineral deposits located at severalhundred meters beneath the Earth's surface. This model will help Geophysics GPR International Inc. (aQuébec-based company) take into account local variations in the soil's electrical conductivity and consequentlyrefine their current calculation model. Once the methodology will be fully implemented, it is expected that itwill help GPR's operations and consequently contribute towards the development of Canada's mining industry.