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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.Operation And Application Of Magnetometers
The technology used in these devices has advanced greatly in the last century. Many different types of physical effects are used to measure these magnetic fields and we will briefly look at some of these.
Legislative and Regulatory Update
• Original Sixteen to One cleared
• Another court case settled
2002 Inductees to the National Mining Hall of Fame
Seven legendary figures of American mining will be enshrined in the National Mining Hall of Fame in ceremonies on Saturday, September 7, 2002, at The Little America Hotel in Salt Lake City, Utah.
Mining Stock Quotes and Mineral & Metal Prices
The Bingham Canyon Copper Mine
While the current mine plans forecast an end of mining in about 2019, Bingham Canyons’ future remains bright. Company officials are looking at an expansion that, if approved, will extend the mine life until about 2036.
What's Left Behind
I love to see old-timer workings while I am out detecting for gold. For one thing, it assures me that gold came from there. Second, it tells me gold should almost certainly still be there.
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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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