How To
Hand Panning Micro-Fine Gold
May 2017 by Keith Bowen
Once you get down to the black sands or a few tablespoons of material, the technique changes dramatically.
The Snapshot
Once all the numbers from all the samples and water tests are compiled, a snapshot of the performance of each tank in the process circuit can be seen side-by-side.
How to Upgrade Your Pocket Plunger
These three simple upgrades, when taken together, will considerably increase a pocket plunger’s magnetic pull and make it less susceptible to breakage.
Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks
I had never run an impact mill before, but anything involving rocks, water and a big electric motor sounded great.
Ask The Experts: Equipment to break up heavy clay
Q: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.
The Fire Assay of Carbon
Carbon, activated charcoal, or “char,” as some old timers refer to it, can be an assayer’s nightmare.
Enrichment of Mineral Deposits by Weathering—Part I
The exact minerals formed in the concentrated supergene deposits depends much on the type of country rock around the deposit and the chemistry of the deposit itself, but if conditions are right, this process will form some rich patches of bonanza ore, in some places valued at thousands of dollars to the ton.The Basics of Geophysical Exploration
In developing a mineral property or mining claims, one of the first goals is to identify and quantify valuable deposits. The classic method of doing this is by drilling holes into the ground to sample what is below the surface. The problem is that one or two holes usually are not going to tell you a whole lot...
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