All Articles
Underground Geologic Mapping
February 2000 by Dwight Juras, PhD
Mapping geology underground is not difficult if one knows the procedures. This article presents the procedures that will allow any miner to produce a geologic map of their workings.
Samuel Franklin Hunt Nevada’s “Rio Tinto”
At the well-known Rio Tinto copper district, Huelva, in southwestern Spain, large quantities of copper were found beneath a gossan of hematite at an average depth of 100 feet. The deposits were first mined during Roman times.
Gold at Quartzville, Oregon
The site of the old mining camp of Quartzville is 30 miles northeast of Sweet Home, Oregon, via a road which is paved for much of the distance. It is located in mountainous terrain along the west slope of the rugged Cascade Range, with elevations ranging from 1,600 to over 4,000 feet.
Letter from the Editor to our Readers and Advertisers
Well, as they say, "there's a time for everything and everything has it's time"—or something like that!
Legislative and Regulatory Update
• 3809 Regulations—Letter Drive
• Environmental groups infiltrate National Park Service
• Interior Secretary Gale Norton chasties environmentalists over Klamath lawsuit
• EPA requests comments on Maximum Contaminant Level rule
A Word from the Editor
Many of the calls and letters I have received from our readers lately have expressed frustration and outright anger at the Clinton Administration.
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.
Legislative and Regulatory Update
• Refunds coming to Nevada claimholders
• More wilderness proposed
• Forest Service planning rule
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The Bawl Mill
• Clinton Declares Three More National Monuments
• McCain Derides Clinton Forest Policy
• Foreigners Lure Mining Partners
• Pacific Island Gov'ts Focus on Undersea Mining
• Options Narrowed for Managing Chugach National Forest
• Company Notes
• Diamond Fever
• Gold in Jasperoid
• New Quarry Regulations in West Virginia
• Ash Fork Calm After Explosives Theft
• Picks & Pans: Mining in Ghana
• Little Rocky Mountains, Montana
• Collector Reaches New Lows to Find Bottles
• Chinese Camp, California and the Tong War of 1856
• Millie's Tailings
• Visionaries, Scoundrels, and Gamblers
• Executive Defends Special Mill Site Exemption
• Chasing the Ghosts of Forty-Niners
• Washoe County Balks at Black Rock Desert Plan
• State's Only Gold Mine Processes Last Precious Ore
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
