Ground Magnetic Surveys

Radai combines drone- and ground-based magnetic surveys, offering both wide-area coverage and high local detail. Ground magnetic surveys with GEM GSM-19T Overhauser magnetometers complement the drone data by highlighting fine magnetic structures that may appear smoothed from the air. By integrating both datasets, Radai provides more accurate and reliable exploration results. When further supported with EM and radiometric methods, exploration risks can be significantly reduced.

Ground Electromagnetic (EM) Surveys

In electromagnetic surveys, the flight height of the drones has a big effect on data quality.
To provide higher resolution and better depth of investigation, Radai can make ground EM surveys over potential targets identified from drone-EM data. The large transmitter loop is the same as in drone-surveys, but the portable transmitter and the EM receiver are specially designed for ground surveys. Ground EM data provide reliable depth and geometry information, reduce exploration risks and guide mineral exploration and resource development.

Ground Radiometric Surveys

For ground radiometric surveys, Radai uses the same Medusa MS-1000 device as that in airborne surveys. The smaller distance to the ground and the slower walking speed improve the reliability of the gamma spectrometer data. Medusa’s Gamman software is used to estimate the apparent potassium (K), uranium (U), and thorium (Th) concentrations of rocks and soils. The gamma radiation data can be used to reveal alteration zones, lithological boundaries, and potential mineral deposits. When integrated with magnetic and EM surveys, it provides a comprehensive subsurface picture.