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Resolution Copper Mine, Arizona
March 2005 by Edgar B. Heylmun, PhD
The Resolution copper mine is near Superior, Arizona (population 3,500), along the west side of the Pinal Mountains in central Arizona, 64 miles east of downtown Phoenix. The region receives about 16 inches of rain per year, enough to support chaparral vegetation.Hard Rock Milling: A Matter of Scale
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
Rio Tinto: Allegations Without Foundation
Bribery allegations against four Rio Tinto employees detained in China are “wholly without foundation,” the mining company said, as Australia continued to press Beijing for details of a case that is straining ties between the two nations.
Diamond Prospecting in Indiana
My first personal experience with placer diamonds was on a gold prospecting trip in Indiana about 8 years ago, when a fellow prospector was cleaning his gold concentrates.
Wham Hill
My year in Australia was almost up and playtime was over. Immigration had pulled the plug and it was time to head back to the States.
Oregon Miners Update
The Siskiyou Regional Education Project (SREP) v. Siskiyou National Forest case over the requirement for plans of operation for suction dredge mining is now in the hands of the US Ninth Circuit Court of Appeals.
Volume is the Key to Success
While recovery rates are important, they must necessarily be secondary to the volume of material processed. Running more material at lower recovery rates is generally preferable to increasing the efficiency of the system.
Gold and Mining Stocks Will Rebound—But When?
There is no question the economy will not always be as good as it is now. There is also no doubt that someday the lack of exploration and the ore in existing mines running out will come home to roost.
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The Bawl Mill
• $100 Million Lost on Faulty ESA Listing
• Geologists Locate Giant Gemstones
• Miner Wins Important Victory Against Forest Service
• Philippines Asks Foreigners to Invest in Mining
• The Art of Finding Coarse Gold Part IV—Recovery of Coarse Gold From Alluvial Placers
• Healthy Interest at Recent Vancouver Conferences
• Idaho Silver Miners Come to Aid of Tsunami Victims
• Picks & Pans: In Search of a Vein: Looking for Hardrock in the Talkeetna Mountains
• Researchers Trace History of Hope Diamond
• The "Rip-Roaring" Flood That Washed Out Mazuma, Nevada
• Looking Back
• Company Notes
• China Ups Investment in Foreign Minerals
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
