ELECTROMAGNÉTICO EN DOMINIO DE TIEMPOS

Electromagnetic (EM) surveys used in the mining industry are a type of active geophysical method, i.e. they use artificially generated electromagnetic fields. A time-varying electric current is passed through a transmitter (Tx) and a looped cable to produce a primary magnetic field. When this primary magnetic field crosses a conductive material, currents are induced within it. These, in turn, have a secondary magnetic field associated with them, which is detected by the receiver (Rx), providing information on the electromagnetic properties of the conductive bodies detected. Translated with DeepL.com (free version)

The geometry of the system, i.e. the spacing, sizes and orientation of the transmitter and receiver will depend on the desired survey scale and lateral resolution to be determined. For example, for the “Mooving-Loop in Loop” configuration, the receiver (Rx) is located in the center of the transmitter loop (Tx). For the “Mooving-Loop Slingram” configuration, the receiver (Rx) is located outside the transmitter loop (Tx). And for the “Fixed-Loop” configuration, the receiver (Rx) can make one or more measurements at any location inside or outside the transmitter loop (Tx).