Commercial Placer Mining With Jigs
August 2010 by Chris RalphDuring the upward stroke, water is pushed up through the shot layer causing it to open up and lifting the gravel particles above. The heavier particles settle faster based on Stokes law, and move down into the shot bed layer, while the lighter...
At the start of the 20th century, copper was king in Arizona, with one of every four workers employed in the mining trade. On the brink of a new millennium, however, the industry is no longer the cornerstone of the state's so-called "Five Cs" economy—copper, cattle, cotton, citrus and climate.
The Bush administration, in its latest effort to nab drug lords and terror financiers, will require major dealers in gold, diamonds and other precious metals and gems to set up comprehensive programs to combat money laundering, announced the Treasury Department.
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.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
In our April and May 2001 issues we reported on the administrative hearings involving the 16-to-1 Mine and their fight against countless MSHA citations, many of which seemed to be driven by inspectors following their own agenda.
I’d like to offer some practical comments about staking and maintaining mining claims. Owning your own claim is the dream of many prospectors. I’ve made good money off my mining claims, both from the minerals I have found on them as well as from leasing out some of my claims to larger mining and exploration companies.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts: Bench Top Crushers • Ask The Experts: How to remove precious metals from lead? • How to Properly Ground Balance to Find the Most Gold • Authorities Search for Lost Treasure Hunters • Alaska Geologist Survives Grizzly Attack • The Guaniamo Diamond Area, Venezuela—Part II • How California Became the Golden State • The Rocky Bar Mining District, Idaho • Mining Stock Quotes, Mineral & Metal Prices