Abstract
Kalahari cover greater than 60 m thick precludes indicator sampling from identifying individual kimberlite intrusions in the Kokong kimberlite field of Botswana. Employing concurrent multidisciplinary geophysical surveying methods is the exploration technique for the discovery of kimberlites. Time Domain Electromagnetic (TEM) surveying is an effective technique for the prioritization of aeromagnetic and gravity signatures. Diagnostic discrete conductive TEM signatures are usually returned from kimberlites overlain by up to 120 m of Kalahari cover. Following the success of kimberlite identification by ground TEM, a VTEM helicopter time domain survey was flown over the Kokong field to increase the TEM coverage in this prospective kimberlite terrain. A comparison of responses over covered kimberlites traversed by both TEM survey methods and their comparative effectiveness for kimberlite identification is presented.
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