Hard Rock 101: Mechanical Techniques
June 2020 by John Norman
Since we know that the secret to breaking rock is applying force from the inside out (putting tension on the rock), we will be looking at ways we can generate force using human and machine power.
Critical minerals are products that the government has designated as critical to our national interest because of both their potential military and industrial applications.
I pulled out the nuggets I had worked on previously and looked at the size of the wire basket that the items to be cleaned are placed into. It looks much like a miniature french fry deep fryer.
We panned out maybe three gold pans of the material and we were shocked at the gold that was there. This rock appeared to be rich.
Another little gem of equipment he built was a nifty sample splitter. In order to get accurate assays, you need to have really good, representative samples for the assayer to process.
“The evidence is clear—mineral deposits alone are not enough to attract precious commodity investment dollars...”
This stringer was where it was not supposed to be, and it contained nuggets that were not supposed to be there.
They must have assumed the paystreak was spotty and had been mined out, so they never mined as close to the side of the valley as they should have.
The Bawl Mill • Our Readers Say Re: It's Time to Get the Heck Out of China • Ask The Experts - What’s the status of suction gold dredge permitting in California? • Ask The Experts - How do I properly and safely dispose of blasting caps? • Ask The Experts - How much silver per ton does it take to make a mine profitable? • Ask The Experts - How clean do my gold concentrates need to be to pour a gold button or bar? • Ask The Experts - What is the name and model of the old jaw crusher pictured in last month’s issue? • Dredging Tips and Tricks: T-80 Air Compressor Maintenance • Clearing the Nugget Trap with a Detector • Resurrecting an Old Hard Rock Mine—Setting Up the Millsite • Desert Prospecting Yields More Than Just Gold • Memories of Shirttail Creek, Northern California • Indictments Pile Up for Gold Traders • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices