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Gold in Sonora
December 1999 by Edgar B. Heylmun, PhD
The state of Sonora, slightly smaller in area than Utah, lies in-northwestern Mexico, adjoining Arizona to the south. It is characterized, on the east, by a high volcanic plateau, the Sierra Madre Occidental, which forms its boundary with Chihuahua.Pinpointing for Gold
This rock had been with a family for many years and they were cleaning up an old workshop that had lots of minerals and miscellaneous “ore” samples.
Map Offers Look at Butte's Mining History
It turns out the old Anaconda Co. really did have 10,000 miles of tunnels beneath this mining city. That’s one of the findings by researchers who have produced a new map that charts the thousands of underground mine shafts here, providing a detailed look at some of Butte’s mining history.
Ask the Experts
• What processing plant should I choose based on my ore type?
• How to select an area to start prospecting?
Melman on Gold & Silver
It appears that market softness due to a slowing Chinese economy may already have affected precious and base metals quotes.
Wyoming—A Land That Time (And Explorationists) Forgot
Wyoming is a vast state, covering nearly 260,000 km2 of surface area, which houses fewer people than most cities (less than 500,000 call Wyoming home). The state has no state income tax, is driven by taxes generated by the oil and gas...
Melman on Gold & Silver
If the government can totally ignore the reality of exceeding the national debt limit, we can only wonder what all the current fuss relating to extending that limit is all about.
The Bawl Mill
• His self-worth has no value…without a password
• Very costly accusations
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• Over the Divide
• Our Readers Say
• Desert Phone Trashed
• ICMJ Elected Prospecting Magazine of 1999
• Advertising Manager Leaving ICMJ
• Guest Editorial—California "Special" Dredge Permits in Jeopardy
• The Search Continues
• Guest Editorial: U.S. Government—Like Nobody's Business
• Circulation and Collections Manager Leaving ICMJ
• Company Notes
• House Chair Requests Records on Forest Decision
• BLM Wants to Withdraw South Pass Public Land
• Silverton Preserving Lofty Symbol of Mining Era
• Hijackers Make Off With 660 Pounds of Gold
• Prospecting With a Magnetometer
• 1999 Tables of Content
• Lighting the Way Underground 1860-1940s
• Millie's Tailings
• Picks & Pans: Crevicing & Sniping for Placer Gold
• Looking Back
• Forest Service Boss Quits in Bull Trout Flap
• Melman on Gold & Silver
• European Gold Miners Seek Clarification Letter
• Mining Stock Quotes and Mineral & Metal Prices
• Squeezing Diamond Into Graphite
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