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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.
US Rare Earths: We Have & We Have Not
America’s premier source of strategic REEs were regulated out of business and 300 employees lost their jobs. For almost fifteen years America has been dependent on the communist Chinese cartel.
Gold Deposition and Gradients of Placer Streams—Part I
When placer miners from the gold rush era began experimenting with the slope of their sluices, they must have pondered the ideal slope for trapping gold in a creek bed too. Logic suggests the same is true for streams...
Melman on Gold & Silver
The Province of British Columbia, one of mining’s most active venues, has just issued a clear warning call to all miners that regulatory changes are on the way, and they may not be welcome ones…
Melman on Gold & Silver
It is becoming increasingly clear that Barack Obama will be an activist President. Unlike his predecessors, he appears set on using the powers of government in an unusually aggressive manner in order to accomplish “public good.”
Silver Bonanza in the Sierra Madre: The Glorious Past of Batopilas—Conclusion
The first Madero Revolution broke out in Mexico on November 20, 1910. On December 27, a revolutionary party exacted supplies, arms, and mules from the company until January 7, 1911, when the 7th Cavalry Regiment of the federal government destroyed three and a half tons of their dynamite near Baquiachi. On September 8, 1912, Batopilas was captured, a local garrison driven out, and the company forced to pay 10,000 pesos. Federal forces retook the town September 19.
A Few Pointers About Cracks and Crevices
Because these crevices catch and hold gold so well, it's worthwhile to learn how they form, which ones are good for catching gold and which ones are not.
An Alaskan in the Lower 48
Our destination was some old hydraulic workings where the old miners had washed literally mountains of material away to expose gold in ancient river channels.
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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
