Partners Kennecott Canada and Aber Resources (ABZ-T) are encouraged by the latest drill results from their Diavik diamond project near Lac de Gras in the Northwest Territories.
A single, large-diameter drill hole from the A-21 pipe yielded 21.49 carats from 6.9 tonnes of kimberlite for a preliminary grade of 3.11 carats per tonne.
The project is held 60% by operator Kennecott Canada and 40% by Aber.
The diamonds recovered from the A-21 pipe range in weight from 0.037 to 2.1 carats, with the largest gem-quality stone weighing 0.63 carat. Previous delineation drilling on the pipe recovered 300 macrodiamonds and 789 micros from 1.4 tonnes of sample core.
In the winter, the joint venture will carry out a more extensive program of large-diameter drilling on the A-21 pipe, which is 5 km south of the A-154 South pipe.
Meanwhile, grade results from processing of the remaining 700 tonnes of the A-154 South bulk sample are expected to be available in the next two weeks.
To date, a total of 1,905 tonnes has yielded a grade of 4.67 carats per tonne.
CRA Diamonds of Perth, Western Australia, has completed further evaluations on diamonds recovered from A-154 South. To date, a total weight of 5,739 carats has been recovered from 1,345 tonnes valued at an average of US$57 per carat.
The A-154 South pipe is estimated to host a drill-inferred resource of 8.4 million tonnes to a depth of 250 metres, with potential to host 20 million tonnes to a depth of 650 metres.
Initial evaluations were also conducted on a 247.5-carat parcel of diamonds recovered from 62.31 tonnes of a mini-bulk sample of the A-418 pipe. The diamonds are valued at an average of US$64.10 per carat.
The A-418 pipe, which lies 750 metres southwest of A-154 South, will be subjected to a 3,000-tonne program of underground bulk sampling. To date, more than 2,100 tonnes have been mined from the pipe, representing an advancement of 154 metres.
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