Sanborn Geophysics strengthens airborne electromagnetic offering for critical minerals exploration

The Sanborn Map Company has expanded the deployment of its advanced airborne Time Domain Electromagnetic (TDEM) survey systems through its Sanborn Geophysics Group. Increased investment in airborne geophysical surveys is being driven by the need to identify new mineral resources and ensure a stable supply of critical minerals for various industries.

Airborne TDEM surveys enable rapid, high-resolution mapping of subsurface electrical conductivity, allowing geoscientists to identify geological formations commonly associated with nickel, copper, cobalt, lithium and rare earth element deposits. The technology helps exploration teams evaluate large regions quickly and prioritize the most promising drilling targets.

Combining electromagnetic, magnetic, radiometric and Lidar data

“Airborne electromagnetic surveys are one of the most effective tools for subsurface mapping and also identifying concealed mineral systems,” said Kevin Killin, P.Geo, chief geophysicist at Sanborn Geophysics ULC. “Our instruments allow exploration teams and government agencies to rapidly map prospective regions and focus investment where geological potential is highest.”

Sanborn Geophysics ULC delivers integrated airborne survey programmes that combine electromagnetic, magnetic, radiometric and Lidar data to provide a comprehensive view of both surface geology and subsurface mineral systems. These surveys are increasingly used by geological surveys, government agencies and mining companies to support critical mineral supply chain development and large-scale resource assessments.

Airborne TDEM surveys are particularly effective at identifying conductive targets associated with nickel-copper sulfide deposits, lithium brines, graphite and other critical mineral resources that may be hidden beneath sediment or glacial cover.

“By rapidly mapping large regions from the air, exploration teams can focus drilling programmes on the most prospective targets, reducing unnecessary ground disturbance and lowering the environmental footprint of early-stage exploration,” said Nathan Campbell, geophysicist at EDCON-PRJ, which recently became part of the Sanborn Geophysics Group following Sanborn’s acquisition of the company.

The technology is increasingly used in regional and statewide geologic mapping initiatives to build high-resolution datasets for subsurface mapping that supports long-term resource assessment and land management.