Star Diamond Corporation provide this technical update on the Orion North Kimberlites. Orion North is a cluster of four contiguous kimberlites that have been erupted in close proximity to each other. These four kimberlites that form Orion North represent the largest volume of contiguous, diamond-bearing kimberlite on Earth.
Initial diamond parcels recovered from large diameter drill (LDD) samples from Orion North kimberlites K120, K147/K148, all contain diamonds over one carat, including two high value stones of 7.50 and 6.88 carats, respectively. The presence of these large, high-quality diamonds points to the potential for coarse diamond size frequency distributions for the Orion North kimberlites.
The Orion North kimberlites have significantly elevated proportions of Type IIa diamonds, particularly K147/K148, which has 52 percent Type IIa diamonds in the size range from 0.05 to 7.00 carats.
The Target for Further Exploration (TFFE) estimated for the significant economic kimberlite units with Orion North is estimated to include between 511 and 609 million tonnes of kimberlite containing some 25 and 50 million carats of diamonds.
Rio Tinto Exploration Canada Inc. (RTEC) conducted extensive exploration work between 2017 and 2022 to prioritize the Fort à la Corne kimberlites outside of Star and Orion South. This work, using the latest exploration techniques, enabled them to conclude that Orion North is the target for further exploration and evaluation.
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