Hard Rock 101: Breaking Rock—Part I
May 2020 by John Norman
What do you do when you’ve located a promising deposit of gold or gemstones, but it’s trapped in solid rock?
So, how much rain does it take to cause a major movement of gravels in a stream and redistribute the gold? The technical answer is enough water to move the bed load of the river.
Micro blasting can be used to take down hanging rock, separate minerals from overburden, and collect gemstones and other high-value product with minimal damage.
Depth is not an issue unless the site is thoroughly cleaned of shallow trash, and it is far easier to isolate and remove targets using a small coil in a target rich location.
Most of us know making a profit as a small-scale miner is difficult; however, sometimes we combine luck with a little skill and bring home a few ounces of the yellow stuff.
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
Prospectors often wonder why gold deposits in veins like it does. Why is one vein rich while another is barren, even though they are only a few hundred feet apart?
I furiously started pulling material out of the side wall and putting it in my scoop. It didn't take long to discover that the source of the scream was from a one-ounce chunk...
The Bawl Mill • Ask The Experts - What does a prospector look for when seeking ores? • Ask The Experts - Is a detector any good at discriminating pyrite or chalcopyrite in ferrous-reject mode? • Ask The Experts - Does the Journal know if any gold mining has been shut down over the Covid-19 virus? • Ask The Experts - Is this a promising assay? • Ask The Experts - How do you utilize magnets in your prospecting equipment? • Ask The Experts - Is using hydrogen peroxide a good indicator for PGMs? • A Note from the Editor • Going Over Old Ground With Newer Technology • Tips and Tricks • Prospecting in the Age of Covid-19 • Sharing Gold Fever with a Friend • Panning on North Fork American Yields Good Gold • Gold Prospecting for Better or Worse: Dum-Dum Dodges a Boom-Boom • 'Wormholes'—Reckless Adventure • All About Lead Minerals, Silver and Gold • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices