Total Magnetic Intensity (TMI) stand as the foremost tools for exploration geologists and geophysicists in today’s Mineral Resources sector. These magnetic parameters serve as robust indicators of magnetic minerals present in subsurface rocks. Leveraging the lightweight and user-friendly nature of land-based instruments, magnetic surveys are indispensable in campaigns targeting copper, iron ore, bauxite, gold, and other base metals.
Additionally, strong magnetic readings often accompany intrusive and volcanic bodies, including dikes, sills, and lenses. Consequently, magnetic surveys play a crucial role in enhancing structural understanding of exploration terrains, both on a regional and localized scale.
Generally, sedimentary rocks and sediments are characterized by low magnetic susceptibility. The sedimentary cover over the deposit accumulates magnetic minerals such as magnetite, maghemite, hematite, greigite, which are the physical and geological prerequisites for using magnetic prospecting methods in exploration for oil and gas deposits. Therefore, under the influence of hydrocarbons in the sub-vertical zone above the deposit, secondary mineralization occurs along with the transfer of heavy metals by microbubbles from the area of the deposit, which leads to a change in the magnetic field above the deposit.
EGSE’s magnetic teams consist of specialized geophysicists, technicians, and geodesy experts. Mobilizing via various methods such as foot, buggy, truck, or horseback, we swiftly traverse large areas, obtaining precise magnetic readings alongside high-accuracy altitude and location measurements.
Our full suite of services includes:
- Survey design
- Acquisition
- Processing
- Integration and interpretation with seismic, gravity, EM, and other geological data
We recognize that precise anomaly detection and lineament demarcation form the bedrock of successful exploration campaigns.
Instrumentation:
- GEM-Systems Proton and Overhouser Magnetometers & Gradiometers GSM-19-TGW Magnetometer (+/-2 nT @ 1 Hz absolute accuracy)
- Cesium and Rubidium magnetometers