A data verification program by consulting firm RSG Global, commissioned by African Copper (ACU-T, ACU-L) for the Dukwe copper property in Botswana, has largely confirmed earlier drill data, while showing some indications that earlier resource figures underestimated grades.
The property has seen several drill programs between 1962 and the present, some of which used diamond core drilling, some reverse-circulation, and some percussion drilling. The verification program twinned ten historical holes with new core holes.
Earlier resource estimates had disregarded the oldest drill programs from 1962 to 1973. Some of these earlier holes were plagued by poor core recovery and results of the new twin holes showed significantly higher grades, including a 24.4-metre section that graded 2.27% copper, which on re-drilling returned 4.02% copper over 21.4 metres, and a 16-metre section that graded 0.77%, corresponding to a re-drilled 15.4 metres grading 2.71%.
RSG’s opinion was that part of the old drilling database could be used for a resource estimate, and that is being integrated with the 38,000-metre drill program African Copper completed in March. Two independent resource estimates, one by RSG Global and a separate estimate by Caracle Creek International Consultants, should be complete later in the year.
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