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Gold/Mining/Energy : International Precious Metals (IPMCF)

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To: Daniel M. Whipple who wrote ()9/2/1996 6:48:00 PM
From: Eric Tai   of 35569
 
Zeev, the recoverable grade I meant was that IPMCF use a concentration
process such as chloride leaching or Knelson concentrator to
make a concentrate from the head ore. Then they use
standard fire assay to find out the grade there. From it, they
were able to calculate back the original ore grade - which is the recoverable grade.

Yes, I agreed with you that the material they sent out did not
have real details about how they do the chloride leaching.

The Apr 17 news release of IPMCF indicated a recoverable grade
of 0.046 opt of gold and a 0.090 opt of Pt using the chloride leaching method, so the combined
grade of gold and Pt is 0.136 opt. Using a rough figure of
US$400 for both Au and Pt, per ton of ore worth about $54.

In the June 4 news release, IPMCF use Knelson concentrator to
prepare the concentrate and was
able to improve the recoverable grade to 0.066 opt of Au and 0.126 opt Pt. This is a combined grade of 0.192 opt of Au and Pt.
Again using an approximate figure of US$400 for both Pt and Au,
per ton of ore worth about US$76 (which is a near 40% improvement of the April result). Yes, they also mention about the Pd grade in June and to simplify the comparisons I have not taken it into account for
the above calculation.
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