All Articles
Enrichment of Gold Veins
November 2000 by Edgar B. Heylmun, PhD
Most of the world's great gold mines are in secondary (supergene) enrichments in veins and stockwork, brought about by physical and chemical processes.
Silver Demand Driving Mine Production Up—Mexico Remains Number One Producer
Worldwide silver production is expected to increase annually, reaching 567 million ounces by 2001, up from 1997 levels of 501.9 million ounces...
The Bawl Mill
• South Carolina Governor feels violated...
• Biting the hand that feeds you...
• A very seedy business...
• Better cash in some gold if you’re a football fan...
Using A Trommel For Placer Processing
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.
Gold Too Big to Carry
There is a unique anticipation that comes with waking in gold country. The long early morning rays bring warmth after a cold night. Restless nights allow thoughts of gold hidden in the ground for too long.
Sluicing at Rocky Bar, Idaho
Like any good prospector, I sampled the bedrock—and am glad I did. I found a half a dozen pieces in the first pan, so I took a second pan. The results were the same.
SS Central America Gives Up Millions in Gold Rush Era Gold
A treasure-seeking young man whose name will forever remain anonymous made the months-long journey either over land or by sailing ship to California after word spread about the gold strike in 1849.
Roads Protecting Grizzlies Reopen
U.S. Forest Service officials are drawing criticism from environmentalists for reopening some back-country roads that had been closed to protect threatened grizzly bears.
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The Bawl Mill
• Our Readers Say
• The Assay of High Iron Gold Ores
• The Patch
• History of Mining—Bradshaw Mountains, AZ (Part I)
• Picks & Pans—The Green Rock, Rattlesnakes, Good Gold and Ruth's Mine
• The Oretron
• Silver Hill, North Carolina
• Residual, Lateritic and Gossan "Soils" as Potential Nuggetshooting Sites
• Hardrock in Downieville
• Looking Back
• Company Notes
• Gold in Northern Baja California
• California State Gold Panning Championship Results
• Melman on Gold & Silver
• V.P. Contender Addresses Mining Show
