Small Mining Operations
Gold in Tertiary Gravels
November 2015 by Chris Ralph
In some places, semi-continuous sections of riverbed can easily be linked in many places to identify the path of the ancient rivers.
Placer Sampling for the Small-Scale Miner
I have seen many samples taken originally with an eye toward getting the highest grades possible, but later someone claims that those results represent an average grade of the whole gravel deposit.
Now Is The Time For Exploration
I’ve been following the precious metals for decades, and I haven’t seen a move this powerful in many years.
Cyanide-Free Gold Separation
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...
The ABCs of XRF
Fast forward to present day and the XRF has come of age. Pull the trigger on the hand-held device and you get a nearly instant assay of the surface of a rock.
Memories of Shirttail Creek, Northern California
…for a few hours, we fervently dug for gold. After we did a cleanup, I couldn’t believe the amount we got.
The Basics of Crushing and Milling Operations
In processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured.
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