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Low base frequency EM provides an advantage to detection of very conductive targets or for exploration with thick conductive cover. A comparison of a 30 Hz and 7.5 Hz system showed significantly better detection to a conductive body at 400 m depth. 12.5 Hz survey was acquired for a graphite exploration survey, providing better definition of a known mineralization zone and identifying areas with further mineralization potential. The AEM data agreed with depths to mineralization from drilling.
Open-Access Online Publication: March 03, 2023
graphite, low-base frequency, airborne electromagnetic exploration
graphite, low-base frequency, airborne electromagnetic exploration
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