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The Boludo Placers, Sonora
November 2004 by Edgar B. Heylmun, PhD
The Boludo placers described here include gravels that have been listed under many different names, including Altar, Golden Triangle, Llanos del Oro, San Francisco, and Trincheras, among others. The placers are on desert flats at the northwest end of Sierra Santa Rosa, about 2,600 feet above sea level. It is in a region of northwest-trending mountain ranges separated by broad desert valleys.Researching Mineralized Areas
There are a load of ways to do research, and I’m going to talk about how I do it—maybe you’ll get some ideas that will work for you, too.
Melman on Gold & Silver
Putting it all together, we have indications that the petroleum price increases could continue and we believe that if that is the case, the impact on precious metals would be positive.
Melman on Gold & Silver
The great question now is whether the correction that followed was an end to that bull market—or just a lengthy corrective phase prior to another important bullish move. Let’s turn to technical analysis of the chart for a possible answer.
Revisiting Commerce Resources—A Tantalum and Niobium Mining Project

The Bawl Mill
• Taxpayers taken for a “ride”
• Fellow Congressmen, lend me your earmarks...
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Advancements in Non-Toxic Gold and Silver Leaching
The non-toxic thiosulfate is actually the medical antidote given to people for cyanide poisoning. By accomplishing both neutralization and metals recovery, this process creates an economic and environmentally attractive process.
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The Bawl Mill
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• BLM Warning About Purchase of Mining Claims on the Internet
• Determining the Amount of Gold in a Quartz Specimen
• Placer PGMs in Coon Creek, California
• Getting Your Float Circuit Layout Right
• Pick Up Austria's New Coin—If You Can Lift It
• New Prospecting Guides Available Online
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• Picks & Pans—Drywashing and Detecting in Southern California
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• Northwest Miners Rally a Success
• Mine Threat Just a Stunt to Criticize Land Laws
• MINExpo 2004 Convention Report
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices