Technology

SIGMA-GEO can suggest the optimal set of EM methods for each geological objective and each depth range

sTEM - shallow modification of TEM method
Depth of investigation: up to 500-600 m
TEM - transient electromagnetic method

2D - two-dimensional survey

3D - areal survey

4D - areal survey with reproducing in time
Depth of investigation: up to 5000 m
MT - magnetotelluric sounding
Depth of investigation: up to 50 000 m and more