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Detecting Invisible Gold
April 2009 by Chris Ralph
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The technology certainly has improved quite a bit over the years, so when these owners are testing various types of gold on their machines and they find that some gold responds poorly or not at all...
Wilfley Tables—Repair, Rebuild & Set Up
I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...
High Prices for Gold, Silver & Copper: What Does it Mean for Prospectors?
Perhaps the first and most important is the fact that the foreign exchange value of the US Dollar has been going down steadily for several months. As the value of the Dollar goes down, the price of goods in Dollar terms tend to go up…
Gold Tellurides: Tellurium, an Assay Impurity
What is a gold telluride? Simply put, it is a chemical combination of gold, silver and tellurium...
The Golden Triangle of Sonora, Mexico
The “Golden Triangle” dry placer district in Sonora, Mexico, lies some 80 to 100 miles south of the border. It is in desert terrain at elevations between 1,900 and 2,300 feet above sea level.
The Bawl Mill
• More power to ya, Gov. Davis
• New Mayor flashes, I mean, clashes with local law enforcement
• Our tax money at work
Charcoal Crucible Recipe
...using charcoal briquettes (and no starter fluid) and a few other easily attainable ingredients.
Picks & Pans: Mining Tungsten Ore—A Case History
In 1977, when the price of tungsten hit one of its highs, three of us formed U.S. Western Mines to look for scheelite, the mineral ore of tungsten. Union Carbide Corporation was purchasing raw tungsten ore at...
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The Bawl Mill
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• The Most Obvious Place
• The Gold of Yuba County
• PDAC 2009 Convention Highlights
• Stimulus Package Provides Potential Tax Savings For Miners
• Melman on Gold & Silver
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• Steven's Trail and the North Fork of the American
