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Gold/Mining/Energy : Global Platinum & Gold (GPGI)
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To: go4it who wrote (5497)4/1/1998 12:30:00 AM
From: Eric Tai  Read Replies (1) of 14226
 
Charles,
An interesting question. However, I think that the COC sample
only means that a random sample is taken from the pile
and sent to the lab for testing under COC.
It did not guarantee that the sample is a fair representation
of the whole pile, it did not guarantee that the pile is not tampered with, it did not guarantee that the head ore will have similar
grade as the pile etc.

The same type of sampling, COC, lab testing or even feasibility study
is happening for many similar types of "disturbed" material such
as waste (but still precious) rock from earlier mines, slags
from earlier mines etc. The reason is that a lot of
old waste rock, slag from old mines still contain a lot of
valuable base metals or precious metals that can be extracted by today's technology. Some mining companies
are going thru those waste to extract the valuable metals.
Some examples are: the waste rock dumps in Armada Gold's
Erdenet Mine; the Nkana Slag Dump of Colossal Resources etc.
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