All Articles
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.Basic Information About Gold Detectors
For those who rarely nuggetshoot, or are thinking about doing a little occasional nugget hunting, to buy a specialized gold detector may not be financially practical. Fortunately, a coin shooter with do-all capabilities, while it may not be as sensitive to sub-grain flakes, is satisfactory for many nugget hunting situations, especially if a smaller accessory coil is used.
My Old Carbide Lamp
All I can say about my carbide lamp is, "I'm glad those days are gone." The carbide lamps were a great improvement over the wax candles, but they had their short-comings also.
Excavator Testing Wet Placer Ground
The excavator or backhoe has become the tool of choice for testing placer ground. These machines are the best way to explore and sample a placer deposit if the ground is not too wet or frozen and bedrock is not beyond the reach of the machine.
The Subsurface Suction Dredge
The problems of the submersible dredge tube are addressed by the subsurface dredge, where the enclosed sluice recovery tube is suspended from a flotation assembly...
Putting Together A Small Free Gold Mill—Part II
There are many smaller old hard rock mines out there—more than you might think. There are some small hard rock properties that are even open to be claimed if one does the right amount of research to find them.
The Paradox Basin—Part II
The Atomic Energy Commission (AEC) was created soon after the war. One of their first deeds was to pass the Energy Act of 1946. This, among other things, provided monetary incentives for nearly every stage of mine development and operation.
Subscription Required:
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