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Gold/Mining/Energy : Golden Eagle Int. (MYNG) -- Ignore unavailable to you. Want to Upgrade?


To: SteveWW who wrote (11555)7/30/1998 8:57:00 AM
From: E. Charters  Read Replies (1) | Respond to of 34075
 
Where I found the gold in BC was in those areas that you mention amongst rocks from 6 inches to 1 inch in diameter in a matrix of clay and black sand. Water speed was about 8 miles an hour. All other things being equal the gold favoured a faster river environment.

It comes to rest against clay barriers often.

In Elliot Lake and South Africa the fossil placers are lapilli in size with a fair amount of pyrite accompanying the mix.

EC<:-}



To: SteveWW who wrote (11555)7/30/1998 9:03:00 AM
From: Don Rohner  Read Replies (1) | Respond to of 34075
 
Mr.Charter:
There exists somewhat of a contradiction that maybe you can help us with! In Guido's report there was coarse gold that could be panned out however the majority of the gold was in fine gold (and rock)that wouldn't/couldn't be separated out with a pan. It was an "unknown" quantity until the lab work found it. Any comments? The profitability if all is "kosher" at this point is really hinging on this fine gold. So if I understand the situation; if a geologist(SEE:1991 Golden Eagle report where only about 1gm/ton was found) went down there and panned some gold he would find approx. 1gm/ton or less per ton and would come back with a non-economical conclusion.
DR



To: SteveWW who wrote (11555)8/7/1998 1:49:00 AM
From: CIMA  Read Replies (2) | Respond to of 34075
 
Hi Steve. Toma sent me the following, any comments?

Wells, John H., 1989, Placer examination--principles and practice: U.S.
Bureau of Land Management Technical Bulletin 4, 209 p.

This manual was originally published in 1969; the current version is a
reprint with some changes. It may be a bit hard to find, but any library
that is a depository for Federal Government publications (most major
universities are depositories) should have it.

I have not heard of anyone using cyanide leach for full-scale production
from a placer deposit containing fine gold. The usual application, of
course, is for lode gold ores, which are much higher grade than placers;
there are both vat-leach and heap-leach versions of the method. It could
certainly be applied to placer gold recovery, but to be economic at
typical placer grades, leaching would have to be restricted to
concentrates produced by size classification and probably gravity
separation. Under these conditions, the amount of cyanide-treated
tailings would be a small proportion of the bulk material processed.
Cyanide-bearing tailings must now be disposed of in properly engineered
and managed impoundments designed to promote natural degradation of the
cyanide, and to facilitate dewatering and eventual reclamation."

U.S. Geological Survey