Field Tests of Geotech?s Airborne AFMAG EM System

Abstract

Geotech?s airborne Audio Frequency Magnetics (AFMAG) system was successfully flown in a helicopter towed bird configuration over selected test sites in Sudbury, Canada. Airborne trials were conducted over Vermillion Lake, the Trillabelle deposit, north range of the Sudbury Basin, and over the Reid-Mahaffy test site. The results over Reid-Mahaffy show that exploration sized targets can be detected while the conductors seen in the Sudbury trials show that larger, and regional conductors are detected as well. Research and development is underway to implement the system onto Geotech?s Grand Caravan, although the noise characteristics of a fixed-wing aircraft are challenging.