Time Domain Electromagnetic Surveys

Knowledge in the Field

Time domain electromagnetic (TDEM) surveys are used in uranium, base metal,
kimberlite and shallow subsurface investigations to map vertical conductivity profiles or
to locate discrete conductors. Large loop TDEM surveys are a very effective tool in
unconformity-related uranium exploration in Proterozoic basins where they are used to
map the topography and thickness of the underlying regolith and to detect steeply
dipping conductors beneath. In base metal exploration, they are commonly employed
to seek for very deep targets beyond the reach of frequency domain systems. TDEM
has also been used effectively in kimberlite exploration to map 2D conductivity profiles
and gain insight into conductor geometries. Borehole TDEM is used to search for
mineralization adjacent to deep drill holes at depths beyond the range of surface EM
methods.

AGL Delivers

Aurora Geosciences provides Geonics PROTEM 67 surveys employing dual in-line power modules and digital 3-component 20/30 channel receivers. We offer in-loop sounding inversion with IX1D and Emigma and discrete 3D target modelling with Emigma 6.0. Output formats are tailored to the requirements of the surveys and include annotated stacked profiles, a variety of filtered contour maps, depth sections and 3D images.

UTEM III Hz  Profiles - Finlayson District, Yukon
Data courtesy Expatriate Resources Ltd - used with permission