Southern Oregon's Illinois River—A Lesson in Sharing
November 2013 by Gary C. EarleOur theory was that a dredge would collect far more material in a shorter period of time, leaving us with ounces of gold every day.
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.
While recovery rates are important, they must necessarily be secondary to the volume of material processed. Running more material at lower recovery rates is generally preferable to increasing the efficiency of the system.
It was time to prime the pump and start the engine! Dan’s priming method is to use a small, submersible, 12-volt pump. My priming method is to use a hand-operated diaphragm pump.
• Prospecting for Diamonds in Kimberlite by W. Dan Hausel
• Miners referring to their activity as “recreational”
Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.
I had my heart set on finding a large nugget on this trip, and it seemed to me that pounding known patches was not likely to turn up a monster. Inevitably I would spend at least half my day wandering off...
Once you have a detector, learn how to use it and get out in the field—you can’t find anything with it in your garage.
The Bawl Mill • Ask the Experts • One Potato, Two Potato... • Proper Placer Sample Processing • Strategic Metals—Part I • Dry Washing to Capture Fine Gold • Are There Any Good Prospects Left? • Ophir—Possibly the Best Kept Secret in Alaska! • Using Sucker Guns to Find Gold • Making Adjustments to Catch Fine Gold • The Subsurface Suction Dredge • A Few Thoughts About Successful Nugget Hunting • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices