How to Refine Silver—Pt II
October 2019 by Roger Neuscheler
Silver recovery from low-level solutions is frequently done in a cell that has a cathode with 2 to 5 or more times the surface area as the anode.
Gold in Guyana—Part II: Process Optimization at Sacre Coeur Minerals' Lower Puruni Alluvial Mining Project
In Part Two of my two-part series I describe the mechanized alluvial gold mining operation on the lower Puruni River launched by Sacre Coeur Minerals in 2011.
What do you do when you’ve located a promising deposit of gold or gemstones, but it’s trapped in solid rock?
“The evidence is clear—mineral deposits alone are not enough to attract precious commodity investment dollars...”
The problem is that extracting gold from hard rock is often a lot more difficult than processing placer gravels. Still, there is some very high-grade ore out there in many old mining areas.
One of his friends had 700 feet of small-gauge mine track and a hundred-year-old track bender laying out in his back 40; plus he also wanted to join the team. Perfect.
In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
The Bawl Mill • Ask The Experts - Do you have more info on Silver Peak? • Ask The Experts - Forest Service blocking claim access • Green Valley's Fine Gold Patch • Hard Rock and Placer Gold of Manhattan, Nevada • Gold Prospecting for Better or Worse: Powerless • Revisiting Old Haunts • Where to Start: Advice for the Beginning Detectorist • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices