Cyanide-Free Gold Separation
February 2011 by Chris RalphSome 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...
This was no ordinary nugget. It had not traveled very far from its nearby source, and that did mean a lot, as we were searching for the source of several such nuggets found during a gold rush that occurred in 1859.
Gold discoveries in the Montana territories sparked a frantic stampede to these bonanza destinations in the early 1860s. Hughes Creek is located in Ravalli County, which is located in western Montana, and the gold here is...
The gold was very chunky and much of it had quartz attached. Even back then I knew that the gold was very close to its source.
Now it was time for the nerve-wracking part of the job: actually removing anything from the hanging wall we deemed to be in need of removal because it was either loose, could be loose, looked loose, or we felt it was just downright dangerous
Since we’ve already covered the basics of permitting a “Notice Level” mining operation, it’s time to talk actual mining.
The Bawl Mill • Our Readers Say • The Basics of Crushing and Milling Operations • Ask The Experts—What minerals are magnetic? Can rare earth magnets capture platinum? • Ask The Experts—Jet nozzle or suction nozzle? Which is best for my highbanker? • Ask The Experts—Precious metals in water? • Rediscovering Placerville, California • Eastern Arizona: Gold and Base Metal Deposits—Part I • Over The Divide—Daryl J. Nelson • Legislative and Regulatory Update • Mining Stock Quotes & Mineral and Metal Prices • Melman on Gold & Silver