Drilling at the Back Lake diamond project, 100 km south of Lac de Gras in the Northwest Territories, has traced the Munn Lake kimberlite sill for 1.3 km along strike.
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A 42-kg sample from the sill yielded two macrodiamonds (equal to or greater than 0.5 mm in at least one direction) and 12 micros, most of which were white and deemed good quality.
Ten holes tested the trend of the sill southeast of Munn Lake. The intercepts extended the strike length of the sill to 1.3 km. The true thickness ranged between 12 and 0.06 metres.
An additional four holes tested the northwesterly projection of the sill and a coincidental ground magnetic geophysical anomaly. No kimberlite was intersected.
Because of the uneconomic thickness of the sill, SouthernEra no longer considers it a viable target.
SouthernEra plans to drill-test two topographic depressions in the area of the kimberlite sill at the bottom of Munn Lake, as well as several magnetic and electromagnetic airborne geophysical targets. Meanwhile, it will continue outlining potential primary kimberlite sources of the Margaret Lake and North Margaret Lake kimberlitic indicator trains.
Island-Arc and Kalahari can increase their interest in Back Lake by spending $750,000 on exploration, $375,000 of which has already been spent. Island-Arc would then hold a 15% interest, Kalahari, 25%, and SouthernEra, the remaining 60%. A division of London-based
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