Sampling for Success—Part I
March 2020 by Chris Ralph
All these decisions and more depend on the richness of a claim—something that is determined by sampling. But sampling isn’t cheap, and even collecting the samples can be more difficult than it appears on the surface.
There were nice sections of vein material at the end of several drifts, like they just stopped work one day and walked away.
We’ve been busy with a plethora of projects, all aimed at gathering gold into a pile big enough to brag about. We’re not there yet, but I’ll show you some of the interesting projects we’ve completed since we talked last.
The excavator or backhoe has become the tool of choice for testing placer ground. These machines are the best way to explore and sample a placer deposit if the ground is not too wet or frozen and bedrock is not beyond the reach of the machine.
Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.
A draft environmental assessment of a proposal to allow long-term camping by gold miners along 21 miles of the North Fork of the Fortymile Wild and Scenic River is available from the Bureau of Land Management.
After he excavates the ore down to bedrock, he goes over the bedrock with a metal detector to ensure he didn't leave any gold behind before he backfills the area.
Most small-scale miners want to know how they can set up a system much more cheaply. The difficulty is in the balance of putting together a decent small-scale system at a reasonable cost.
The Bawl Mill • Ask The Experts -- How do I find the owners of patented property? • Ask The Experts -- Is it worth going after these rare earth minerals? • Ask The Experts -- Will a land mine detector work for gold? • How to Turn Your Gold Finds Into Cash • My First Gold Patch • Caught Between A Hard Rock and A Rare Earth Place • The Potholes—California’s Oldest Known Mining District • Over The Divide: Annie Carol Robinson • Gold Prospecting for Better or Worse: If the RV’s a Rockin’, Please Come a Knockin’ • The Mid-Winter Nugget • Gold In The Midwest—Part III: Iowa, Missouri, and Kansas • Trump Proposes $1.5 Billion to Fund US Uranium Production • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver