Drilling by KWG Resources (KWG-T) at the Grand Bois gold deposit in northern Haiti has produced results similar to those obtained through work performed by the United Nations Development Program from 1978 to 1984.
The U.N. resource estimate stands at 4.4 million tonnes grading 2.24 grams gold and 15 grams silver per tonne.
The gold is concentrated in an oxidized zone that starts at surface and extends to a depth of 45.5 metres, with an average thickness of 20.5 metres.
The mineralized zone is tabular and roughly circular, measuring 300 by 350 metres.
The best results from KWG’s 16-hole program include:
* 36.7 metres (from 0 to 36.7 metres) grading 5.46 grams gold in hole 1; * 40.1 metres (from 0 to 40.1 metres) of 4.68 grams in hole 1-F3; * 38.5 metres (from 0 to 38.5 metres) of 1.05 grams in hole 7A; * 33 metres (from 0 to 33 metres) of 2.56 grams in hole 8;
* 18 metres (from 0 to 18 metres) of 3.24 grams in hole 12;
* 12 metres (from 0 to 12 metres) of 1.29 grams and 16 metres (from 27 to 35 metres) of 2.77 grams in hole 15; and
* 45.5 metres (from 0 to 45.5 metres) of 1 gram in hole 16, which was drilled to test the eastern extension of the deposit.
The deposit is amenable to open-pit, heap-leach mining methods, with metallurgical testwork showing recoveries of up to 91.9% for gold and 48.7% for silver.
KWG, which drilled deeper than the U.N., also intersected copper values at depth.
The highest-grade interval was 36 metres grading 1.08% copper, while the thickest interval was 63.3 metres of 0.47% copper. Many holes terminated in the copper-bearing zone.
KWG is now proceeding with a full feasibility study, which will probably include a bulk-sampling program.
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