Frequency Domain EM Soundings (FDEMS)
The FDEMS method is the only electroprospecting method that combines both Geometrical and Induction Soundings principles which allows FDEMS with high degree of accuracy to determine the depth to near-horizontal layers of the section even in areas with high level of industrial noise. The depth of investigation in FDEMS is regulated by both the frequency and the momentum of the measurement setup which allows to “fine-tune” field measurements to achieve required accuracy of results. At high frequencies, the electromagnetic field penetrates in the near-surface part of the section, whereas with the decrease of frequency, the deeper part of the section are being investigated. Nowadays, modern broadband multifunction EM receivers, current sources, software for data processing and interpretation allow to apply FDEMS method to solve a variety of exploration and engineering problems in wide depth intervals.