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Gold/Mining/Energy : Western Copper Holdings Ltd. T.WTC -- Ignore unavailable to you. Want to Upgrade?

To: dave brown who wrote (236)	3/19/1998 12:28:00 AM
From: jack marshall	Respond to of 401

Widths are thick enough for blasthole stoping. Typical costs are about $C20/tonne for such a method. Total site costs in the $C50-60/tonne range. The deposit is shallow enough for decline haulage using 40-50 tonne trucks so it should be possible to avoid high capital cost for a shaft. If 5-10 million tonnes can be proved up at +2.5% Copper equivalent a +500,000 tonne per annum operation may be possible. Massive sulphide metallurgy can be adversely affected by high pyrite in the ore. This is especially true for zinc recovery. I haven't heard any news on the grain size. If its coarse, +80% recovery is relatively easy. If fine grained both recovery and concentrate grade is hurt. Also, if there is a lot of pyrite/pyrrohite look for sulphide dust explosion problems underground. A concern but manageable. Other than that I wish Western Copper well. (I'm not a share holder, just an interested lurker who has worked at a few of these types of operations over the years).