Test GREATEM Survey for Mineral Exploration in Korea

In an effort to introduce and evaluate the GREATEM system in Korean geologic condition, test airborne geophysical surveys were conducted over a known uranium deposit. The results were compared with previously available loop-loop AEM data by Hummingbird system. The main geologic feature of the test site is the phyllite formation with uranium mineralization in a graphitic zone and graphitic conductors were successfully delineated. Considering the field condition with tough topographic variation, GREATEM system seems to have better performance in terms of data acquisition and depth of investigation. Sign reversal in the GREATEM data was also observed, which can be modeled and interpreted with 3-D inversion algorithm. By this comparative study, we could convince that AEM technology is a very effective tool to the exploration of mineralized zone in Korean geologic environment.