Understanding Hard Rock Mining: Terms and Methods—Part II
July 2004 by Chris RalphA better understanding of hard rock mining methods and knowing a little about how these mines work can help the individual prospector to understand reports and stories about both modern and historic mine operations.
Nome has a colorful history built on gold, where over 5 million ounces of the yellow metal has been dug up. Due to limited space, only a tiny fraction of this mining district can be touched upon. It would take volumes to cover all the information...
While a great many questions remain unanswered, there is little doubt that a new financing option for small-scale mining operations, “crowdfunding,” is growing as a viable and legitimate funding source.
Occurrences such as these have proven, time and time again, that gold possesses the attribute of maintaining significant value over time, something that cannot be said of unbacked, fiat paper money where every such issuance has eventually deteriorated throughout history into virtual worthlessness.
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
• Can I get advice on a hard rock property in Calaveras County, California?
It has been claimed that the introduction of excess air to the assay furnace during sample fusion can materially increase the gold yield. Testimony by expert witnesses for the defense in recent federal hearings dealing with the dependability of the gold fire assay includes data purported to show this.
We decided to run a detector over each piece. If we got a decent signal we placed the piece into a high-grade pile and the rest went into another pile to be worked on later. This high-grade pile wasn’t that large—maybe 25 pounds...
The Bawl Mill • Mining Claim Fees Are Going Up • Our Readers Say • Buell Park Pipe, Arizona • Mines and Money • Two Nevada Mines Look to Supply Own Power • Paleontonlogical Resources Preservation Act • Picks & Pans: Mexican "Edventure" • Over the Divide • Flat-Fault Gold in Sonora, Mexico • Looking Back • The Fern Mine • Map Offers Look at Butte's Mining History • Gold in China • 2004 National Mining Hall of Fame Inductees • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices