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.
Q: I have a question/request regarding some black sand left from my Dad’s prospecting days.
For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.
The General Mining Law of 1872 is not antiquated, but its roots are ancient, stemming from Greek and Roman law, and continued in English and Spanish law. The recorded laws and practices of mining extend back nearly 3000 years.
What a month! One day we were keeping our eyes on the turbulent, hurricane-filled skies over Florida as the seemingly endless array of powerful storms continued on, then we were watching the televised Presidential debates, and all the while we were being inundated with a relentless barrage of stories regarding crude oil, gasoline and heating oil as their prices roared ahead with a vengeance...
• NovaGold Resources Inc.
• Canyon Resources Corp.
• TVX Gold Inc.
• Silver Standard Resources Inc.
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