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The Thompson Bros. Lithium Property is located in Wekusko Lake, 20km east of the mining community of Snow Lake, Manitoba. The main highway to Thompson and Flin Flon, plus the railway to the Winnipeg and the seaport of Churchill passes 40 km south of the property. The property consists of 18 contiguous claims covering 1829 hectares. Manitoba is one of the top rated mining jurisdictions in the world and electricity costs are amongst the lowest in North America.
The lithium deposit is a spodumene rich pegmatite dike with a near vertical dip and a strike length of over 800 meters. The dike was originally drilled in 1956 by Combined Developments Limited, with three additional holes drilled by Carta Resources Limited in 1997; for a total of 30 drill holes. A resource calculation made by B. Ainsworth, P. Eng. in 1998, resulted in an "undiluted drill indicated mineral resource" of 3,968,000 tonnes with a weighted average value grade of 1.29% LiO2 to the 130 meter level, and an average width of 10 meters. A further 337,000 tonnes is indicated by the deepest hole (D.H. Car-97-2), to the 380 m level, which is over 200 meters from the nearest hole, and which cut a horizontal width of 8 m of 1.3% LiO2. Thus, Ainsworth suggests a total drill indicated and possible total resource calculation of 4,305,000 tonnes of 1.3% LiO2 for the deposit (NON 43-101 Compliant), open to depth and along strike. The 1998 resource calculation is historical and not National Instrument 43-101 compliant as it was completed prior to the implementation of these requirements, and thus cannot be relied upon.
A metallurgical evaluation of the spodumene deposit by Dr. W. Dressler of Laurentian University indicated that simple floatation would recover 92% of the spodumene and produce a concentrate grading 6.6% LiO2 or 89.2% spodumene. Carta Resources completed a business plan to develop the Thompson Bros. Lithium Deposit for the production of lithium carbonate, but a decline in lithium carbonate prices stalled the project in 1998.