Prospecting & Detecting
Old Dog(Fighter), New Trick
June 2022 by Ralph Wetterhahn
Then it occurred to me that the drywasher was designed by an engineer. Gotta love engineers! Those slide-rule geeks always tinker with gravity, angles, curves and flow.
Prospecting Underground: Use Caution
In underground placer work, the contact point of the bedrock tunnel and the gravel is a very weak point and always has to be timbered. The bedrock here is thin, fractured, and the gravels loose from many years of oxidizing.
Gold Geochemistry: Where Does Gold Come From?
Prospectors often wonder why gold deposits in veins like it does. Why is one vein rich while another is barren, even though they are only a few hundred feet apart?
More On Gold Indicators—What to Look For
I am learning more about gold deposition in this area than I knew previously. I am passing this information on with the hope that many of you will be able to locate patches and lines a little easier in the future because of this article.
Gold Rush in the Congo

Treasure Hunters Challenge FBI Over Dig for Civil War Gold
The father-son duo spent years combing this bit of Pennsylvania wilderness with high-end metal detectors, drills and other tools to prospect for a fabled cache of Civil War gold.
3D-Printed Tools for Prospecting
…these two guys are part of the new hi-tech generation who review new technologies and are always looking for new ways to apply them in innovative fields!
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The Bawl Mill
• Why The Paper Change?
• Ask The Experts - When do I use detector discrimination?
• Ask The Experts - Is gold found in limestone?
• Ask The Experts - Can pyrite crystals be the same color as gold?
• How to Use BLM’s New Mineral and Land Records System
• A Short But Productive Hunt
• Blast from the Past: Jeff Casserly Tells His Own Story
• Talking Metal Detectors with Brent Weaver of Garrett
• Strategies for Detecting Heavily Pounded Areas—Part III
• EPA Recommends Against Reissuing Permit for PolyMet Mine
• The Highs and Hazards of Desert Prospecting
• Just Feel The Heft of It
• Proposed Nebraska Mine Has Sizeable Deposit of Rare Elements
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
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Introducing ICMJ’s New Owners: Josh and Sherrie Reinke
• Legislative and Regulatory Update
• PLP Update