Exploring Placers with Auger Drills
June 2014 by Jim HalloranAugers can be used effectively for placer exploration with certain limitations.
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.
...Judge Ochoa ordered the parties to participate in mandatory settlement hearings starting June 24, 2014.
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 15 rare earth elements were discovered long after the gold rush began to wane, but demand for them only took off over the past 10 years...
Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.
With eight loads processed, a pumpkin-size rock fell into the hopper, stopping the whole operation until I could lift it out.
The first step in my recovery process after milling the ore to the desired size is to table it. On this particular ore, I get good results milling it to minus 100 mesh.
The Bawl Mill • Ask the Experts • Ask the Experts • Ask the Experts • Ask the Experts • Ask the Experts • Ask the Experts • Finding Gold with a VLF Detector—Part III • Silver and Base Metal Deposits of the Pioche District • California Dredgers: A Step Closer to Getting Back in the Water • Arizona's Youngest...and Oldest Prospector • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices • Correction • Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks