The Magneto telluric method is a passive surface geophysical technique which uses the time varying earth’s natural electric and magnetic fields to study electrical resistivity of the subsurface.
Magnetic and electrical fields are measured in the frequency band 10-4 Hz to 10 kHz, with high frequencies (>1 Hz) coming from thunderstorm activities in the equatorial belt, while low frequencies (<1 Hz) occur due to the interaction between the solar wind and the earth’s magnetic field (magnetosphere) and ionosphere.
Natural electric and magnetic field strengths are simultaneous recorded in two orthogonal, horizontal directions as a function of time. The resulting time-series data is then Fourier transformed to the frequency domain and processed to derive the impedance tensors of the apparent resistivity and phase.
For geothermal exploration, the MT method targets deep brine reservoirs and hot (or partially molten) rocks that would act as the heat source for a geothermal system under survey.
- Mineral Exploration
- Oil and Gas Exploration
- Groundwater Exploration
- Deep Crustal Research
- Environmental and Engineering Studies
- Geothermal Exploration
- Reservoir Monitoring
- EM Project Management
- Data acquisition Planning (5-channel MTU-5A MT data acquisition systems)
- Quality Control
- Data Processing
- 1D, 2D and 3D Inversions
- Integration with other geoscientific data
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