Monday, April 1, 2013

Catching 60 mesh gold with a sluice box

Catching  60 mesh gold with a sluice box
Catching  60 mesh gold with a sluice box

I just finished spending a couple of days doing a bit of testing on a property we hope to mine this summer.

I am a very big fan of the Clarkston report done on the Klondike back in 1989. I was mining full bore on my Grasshopper creek holdings at that time and was trying every kind of recovery system that was out there.
In 1987 I stripped 800,000 yards of overburden and washed over 100,000 yards of paygravel.

This was an ideal time to put a lot of yardage into different types of recovery apparatuses. I had old mine tailings dumps to experiment on and a lot of recovery challenges that I was able to dedicate a lot of my time on. I am always on the lookout for some subtile change of recovery dynamics of sluiceboxes.

On this test just a couple of days ago and I was pouring it to it, I changed to these riffles and curiously I had a huge recovery on 60 mesh gold by changing from a #4 gratex expanded metal riffle which I usually don't stray far from, to this diamond pattern and was able to scalp out a very satisfactory recovery on some very fine gold. The fine gold seemed pretty happy settle out of the upper slipstream and stay put.

Just jumped out of my box a bit and sharing a bit of yesterdays fine gold recovery. For the big picture jigs and probably a nelson concentrator will probably be in the works!!!  Still..... those riffles look pretty good to me. The deposition of the gold is very uniform and shows a good settling pattern. This is a good reference photo for sure.

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