Prospecting With a Magnetometer
December 1999 by Edgar B. Heylmun, PhDSwedes 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.
…for a change, it is time to turn away from the Trump-Mueller frenzy and concentrate once again on some of the other sources of information which can present us with valuable information related to our precious metals.
• The 75-ounce Butte County nugget is the largest found in California since the 156-ounce Mojave nugget in the 1970s...
We are sad to say that one our most beloved writers, Ron Wendt, passed away on November 10, 2007.
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
• Expensive bags will be around for a long time
• Year-end spending frenzy begins
• Illinois goes to the Democrats
Last month, in “Following Clues to a Hidden Gold Deposit,” I ended the article with the direction that we were on the hunt! We were getting prepared and ready to roll with our detectors, then snow came, and lots of it. We had already found the seam diggings mine on the mountainside in wild, rough brush and trees. It had been well hidden.
Placer deposits are the focus of many small-scale prospectors, as they can be worked with comparatively inexpensive equipment. In this conclusion of a six-part series, we will take a look at the geology and formation of placer deposits...
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