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Cerro Colorado Silver, Arizona
November 1999 by Edgar B. Heylmun, PhD
It was the first mine developed by Americans in the Cadsden Purchase of 1853. A number of small near-surface mines had been operated by Spaniards and Mexicans in the region prior to the arrival of Americans, going back as far as 1740.Ask The Experts—Amalgamation
Q: Exactly how does amalgamation work? Does it “melt” the gold (or copper, or silver, etc.) and form an alloy? If one leaves a piece of gold in mercury, will the entire sample become an amalgam (combination) of gold and mercury? Or does it only affect the surface...
2015 World Gold Panning Championships
Every Spanish village seems to hold their pride in one unique area of expertise. Pamplona has its bulls, Barcelona its architecture, and gold panning belongs to Navelgas.
CMA Conference Summary
I recently attended two out of three days of the California Mining Association’s Annual Conference in Monterey, California, and found it well worth my time.
The Bawl Mill
• Too little, too late...
• Beware of Argentina...just kidding!
• A million dollars just doesn’t go as far as it used to...
• Well qualified
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The Importance Of Mining Critical Minerals In The USA
Critical minerals are products that the government has designated as critical to our national interest because of both their potential military and industrial applications.
The Klamath Mountains
Over 7 million ounces of gold have been produced in the Klamath Mountains of northwestern California, 64% of which has been from placers.
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The Bawl Mill
• USPS Delays ICMJ Delivery at Oakland, CA Processing Center
• Another Gold Heist Reported at Nome
• No Need to Rewrite Mining Regs, NAS Study Confirms
• BLM Filing Requirements for Small Miners' Waiver
• Asarco Accepts Phelps Dodge Buyout
• Once Lonely, Mojave Desert Phone Now World's Companion
• Judge Blocks Road Protest
• Company to Sue Over Stymied Gold Mine
• No Mining / Logging on 40 Million Acres
• Catastrophism vs. Uniformitarianism
• 1st Annual Placer County Open Gold Panning Championships—1999
• Picks & Pans: The Ten-Pennyweight Nugget
• Mining in Sonora, Mexico
• Pullin' the Pin
• Land of Golden Dreams—California in the Gold Rush Decade
• Progressive Privy Program Proved Popular
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Surging Gold Prices Burn a Few Unlucky Mining Firms
• Looking Back
