Geoelectrical and electromagnetical techniques
In order to distinguish between layers and bodies of different electrical conductivity and specific resistivity, respectively, we use the following methods:
- Geoelectrics
- Resistivity mapping and sounding (including water-covered areas)
- 2D/3D-geoelectrics (tomography)
- Elektromagnetics
- Frequency-dependent EM (mapping/ sounding)
- Transient EM (TEM)
- Very-Low-Frequency (VLF)
- Aero-electromagnetics
- Induced polarisation (IP)
- Self-potential measurements
The above-mentioned methods are primarily used to address the following questions and problems:
- Exploration (ores; sand, gravel and stone quarries)
- Hydrogeology (aquifers and aquicludes, contaminations, estimation of flow direction)
- Engineering geology (fault zones, lithology)
- Environmental geology (investigation of inherited liabilities and search for contaminations)
- Archeology
- Dams and dikes
- Detection of ammunition
- Determination of the permeability of soft rocks
- Leakage detection in flooded construction trenches
For geoelectrical and electromagnetical surveys we hold diverse multi-electrode equipment (Geosys and Syscal) as well as EM31, EM34, MaxMin and measurement devices for T-VLF.