Rich Placer Gold Deposit - Very Fine Gold
by Ken Cunningham
(Myrtle Point Oregon)
I have come up on a very large "Sand" Placer Gold Deposit. However, it is Micron Size in every sense of the word. Black and blonde sands are the same size as the gold. I can not determine a proper way to separate the Gold from the inclusions. Classified some @120 mesh. Some gold and material comes through and some lays on top. Tried a "Blue Bowl".(Washes out) I can't seem to capture the gold content separate? This stuff was gold mined in the 1850s/60s.
Stan's response: Hi Ken, if you are planning to gold mine on a small scale, I would try a spiral concentrator wheel and experiment with all 3 settings.
If you are planning to gold mine on a large scale, I would use a gold wash plant with jigs and a large spiral concentrating system such as Oro Industries produces in Northern California.
If those methods don't work well enough and if the material is rich enough, I would try amalgamation or leaching.
If none of that works, I would look for a new deposit with coarser gold!