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Gold/Mining/Energy : NDT VENTURES

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To: Elizabeth Andrews who wrote (920)	1/4/2001 1:13:13 AM
From: Claude Cormier	Read Replies (1) of 992

<They don't say what grind they did the bottle tests at.> True... They were surface samples... They certainly need more extensive tests. < I don't know how far they have to truck the waste which I estimate the stripping ratio to be 3:1. Top of a ridge means no flat places to put the waste that are stable. Where are the leach pads going to be? > All good questions... but the distance they need to travel to dump the waste has nothing to do with the strip ratio. Looking at the cross-sections and computing a few holes, I can see something between 1:1 and 2:1. Also looking at these pictures can help answer your question, about the location of the pads and dumps... I must say I don't know..even if I can see a few areas that could be flatten. northair.com northair.com <Each tonne of waste should cost about 50 cents/tn to get out of the pit by then what?> I think it will be more $0.75++ <This type of rock unit is not known to be easy to drill and blast as the drill centers have to be fairly tight> I have no idea on that. <And, grinding may be expensive as the work index could be 14 or better.> What do you mean by work index... I understand crushing size in inches or mesh.. but work index ?? BTW, even if they have to go at a 3-stage crusher...it is still afordable...Look at Corner Bay pre-feasibility study on which mucho analysts agree.... US$40-$45M CAPEX for a 14,000 tpd operation with a 3-stage crusher to 3/8. Not too many details on the remaining of your questions... CC

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