The Star is a sill-like body consisting of multiple horizons of primary, volcaniclastic crater facies in a 2-sq.-km area. The horizons extend over a vertical thickness of 150 metres in the western portion of the property, tapering to 30 metres to the north, east and south. The spring 2000 drill program intersected individual intervals of continuous kimberlite ranging in thickness from 5 to 128 metres.
Based on drilling to date and geophysical modelling, Shore estimates a preliminary resource in excess of 200 million tonnes. The Star body lies beneath 80-125 metres of unconsolidated glacial overburden.
Split core from 15 NQ-sized holes (47.6-mm core diameter) drilled in the first half of 2000 has been analyzed for microdiamonds at Kennecott Canada’s laboratory in Thunder Bay, Ont. A total of 1,494.5 kg yielded 244 microdiamonds and 76 macrodiamonds weighing a combined 0.404 carat. (A macro measures greater than 0.5 mm in at least one dimension.) The results from one PQ-sized hole (3.34 inches core diameter) are still pending.
Fourteen of the macros have at least one dimension equal to, or greater than, 1 mm. The largest recovered stone to date is a fragment measuring 2 mm, with a weight of 0.05 carat.
The current drilling will test Star’s northeastern and southeastern extensions.
The Star property is 60 km east of Prince Albert and sits at the southern end of the northwest-striking Fort a l Corne kimberlite belt, which extends over a 50-km distance and contains some 73 kimberlite bodies.
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