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The Golden Triangle of Sonora, Mexico
May 2001 by Edgar B. Heylmun, PhD
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.
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.
Melman on Gold & Silver
One of the most popular medicines commonly available is “Dramamine,” defined to be, “… used to prevent and treat nausea, vomiting, cramps and vertigo associated with motion sickness,” according to our favorite medical dictionary. Well, after watching the various financial, political and psychological gyrations that have been taking place in the world’s markets over the past month, we might suggest that some sort of psychological Dramamine might be in order.
Barrick Offers $10 Million to Unlock Silver Ore
Barrick Gold Corporation is offering US$10 million to anyone who can unlock the silver from the ore at its Veladero gold mine in Argentina.
MMAC Update
Within these districts, some of the roads and trails have been reopened for access, critical habitat designations have been scaled back, and a few Mining Districts were completely removed from proposed withdrawals.
Tips for Detecting Nugget Patches
Entry-Level Metal Detectors for Gold Prospecting
These are entry-level machines designed with gold prospecting in mind and with the ability to handle mineralized ground and see nuggets of a grain or so in size, perhaps smaller.
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The Bawl Mill
• Original Sixteen to One Goes to Court—Challenges MSHA Citations Part II
• Using Legal Subdivision
• Placer vs. Lode Gold
• Gold Tellurides: Tellurium, an Assay Impurity
• Court Hears Arguments Over Rights to Shipwreck
• Picks & Pans: How to Succeed in a Small Mine, A Case History: 1990-2000
• Charcoal Crucible Recipe
• Discovery of the Mountain Pass REO Deposit
• Romance of the Old Silver King
• Record-Breaking Alaskan Nugget for Sale
• Company Notes
• Nevada Gold Production Up Despite Lower Prices
• Gold in Guatemala
• Bush Taps Utah Resident for Labor Post
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Honda Pares Down Use of Precious Metals in Autos
