Ask the Experts
December 2012 by Chris RalphWhat is the best type of mat to use in a high banker set up?
Augers can be used effectively for placer exploration with certain limitations.
Q: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.
After paying for the mine fleet, mill capital, supplies, fuel, power and labor, at today’s metal prices, does this mine make a profit?
My intention was to end this discussion with waypoints and routes, then I found USGS maps of the Plainfield Quadrangle.
Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.
The first and most important thing of the sampling process is to try to be as unbiased as possible. There is a natural tendency to select rock that looks the best—even unconsciously.
How big is the deposit? Are there boulders you will need to move? Do you just want to recover the nuggets or do you think there is good fine gold that you will also want to capture?
The Bawl Mill • Legislative and Regulatory Update • Prospecting for Gold at Green Valley • Extraction of Precious Metals Using Froth Flotation • Detecting Old Ground Sluice Locations • Mineral Deposit Trends: Real and Imaginary • Four Arrested for California Mining Museum Heist • Scams, Scammers and Schemes • Lawsuit Update From the New 49'ers • Constitutional Sheriffs Standing Up for Our Rights • What's Left Behind • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices