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Prospecting With a Magnetometer
December 1999 by Edgar B. Heylmun, PhD
Swedes were the first to note variations in the Earth's magnetic field, circa 1640, and they were the first to use the dip needle. They made the first magnetometer in 1870.
Early Summer Mining in Wyoming
Old tailing piles extend for miles. There was still plenty of water flowing here, so WPA members set up highbankers at several settling ponds.
Ask the Experts
What is the ceramic-like material embedded with gold?
Ask The Experts - Help with an assay report
Teenager Finds Large Nugget
Fourteen-year-old Jacob Hopkins and his father Mike headed out like they do most weekends, to do a little fishing and hunt for gold.
Special Rock
This “special” rock was much bigger and after having smashed it in half, and then in half again and again, a small gold nugget just sat there looking at me, still embedded in a small mix.
All About Chalcopyrite
…there are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then through the effects of weathering are changed into other minerals like malachite, cuprite and chrysocolla.
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.
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The Bawl Mill
• 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
• 1999 Tables of Content
• Lighting the Way Underground 1860-1940s
• Millie's Tailings
• Picks & Pans: Crevicing & Sniping for Placer Gold
• Looking Back
• Gold in Sonora
• 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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