Delgratia Mining (DELGF) Message Board

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Gold/Mining/Energy : Delgratia Mining (DELGF)

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To: Randy Giese who wrote (184)	4/13/1997 6:57:00 PM
From: Eric Tai	of 532

Randy, I agree with Ron that <<Seeing as the assay results can be achieved with fire assay, this would indicate that the assay grades reported could be recovered>>. One reason the Canadian mining companies and Canadian stock exchanges still insisted on fire assay instead of the new advanced physical/chemical machine assaying methods is because fire assay grade mimic the recoverable grade more closely. Most mines' recoverable grades are a percentage (from 60%-95%) of fire assay grade. Hardly will you see a mine with recoverable grade higher than the fire assay grade. So fire assays grade usually set up the upper limit for recovery of gold mines. Actually from the hole #4 result released by DELGF -- you can see that gold can easily be recovered from the DELGF's Nevada property. The April 10, 97 DELGF news release talked about <<Hole 4 results previously released (10-1040 ft grading 0.063 oz/t gold or 2.14 g/t gold) were determined by leaching a coarse ground material. New results reported here are from fire assay of this same material at a finer grind. DRILL HOLE 4 - NEVADA PROJECT Average Grade (0-1120 ft) Gold = 0.102 opt or 3.51 g/t)>> This means that originally in the earlier Mar 19 News release, they use leaching on a coarse ground material and was able to get 0.063 opt. But using fire assay on finer grind later, they got 0.102 opt. This means using leaching on coarse ground material they get a recoverable grade of 0.063 opt which is a 0.063/0.102=62% recovery grade. Not bad for a leaching on coarse material in such an early stage. By improving on the leaching method, leaching time and leaching finer grind material, they should be able to get a higher recoverable grade. And the current 0.063 opt seems to be economical already. Like Ron said, only a full scale metallurgy study will determine the real recoverable grade, method etc. -- but so far the signs are good. That's why both Ron and Jay Taylor do not worry about the recovery for DELGF's material -- in contrast with the other desert sands. Incidentally, both Ron and Jay ranked IPMC as first and DELGF as second among the exciting desert plays. The material may be complex in a sense that they may not be able to recover close to 100% of the gold there -- but it does not necessary mean that they cannot recover it by simple leaching method economically.

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