Contwoyto Diamond Project

The Contwoyto Kimberlite, which is located adjacent to the Muskox East prospecting permits, was discovered in 1998 by Tahera Diamonds. The kimberlite sits at the head of a 20 km length DIM train. The kimberlite is a pear shaped 60m by 80m pipe that is represented by a weak magnetic high anomaly adjacent to and east of a NW trending diabase dyke. The kimberlite underlies a small boggy area. A total of 15 holes were drilled into the body with a maximum depth of 222 m and remains open at depth. Tahera reported a preliminary estimated grade of about 0.27c/t.

Starting in 1996 Canamera and subsequently Lytton conducted various exploration programs in the Contwoyto Region. The exploration included regional airborne and ground geophysical surveys, till sampling, and drilling that lead to the discovery of the Contwoyto mineral train. Tahera continued exploration in 1998 in the Contwoyto region first focused on the Contwoyto train with extensive till sampling as well as property scale geological mapping, ground geophysics and drilling. Focus switched to detailed exploration at the head of the train with mapping and ground geophysics which resulted in the discovery of the Contwoyto kimberlite. During 1999 and 2000 Tahera conducted detailed and regional till sampling to identify potential sources of diamonds (or kimberlite) indicator minerals (“DIMs”). A total of 279 till samples were collected and processed from the Contwoyto region, 104 of the 279 were anomalous, with total indicator counts per sample ranging from 0 to 49 grains.

Michael Dufresne, M.Sc., P.Geol., P.Geo., an independent director of the Company, also serves as a qualified person as defined by National Instrument 43-101, responsible for reviewing and approving the technical content of all materials publicly disclosed by Benchmark, including news releases, corporate presentations, fact sheets, and website.

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