Prospecting & Detecting
Dredging Tips and Tricks: T-80 Air Compressor Maintenance
June 2020 by Harry Griffin
The next morning, I retrieved the compressor and again attacked the sticky head bolt. As if by magic (and some applied physics) the head bolt sighed and finally broke loose.
Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board
Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.
Our Readers Say
• Re: Tyrie's Roadway Nugget
• Re: Are Permits Needed for Highbanking in California
Hard Rock 101: Micro Blasting
Micro blasting can be used to take down hanging rock, separate minerals from overburden, and collect gemstones and other high-value product with minimal damage.
Cold Alaskan Gold—Part II
I decided to focus my attention on some exposed bedrock that was along a little stream only about 100 yards from our cabins. My very first pan full of gravel showed several nice small flakes that were just big enough to be picked up with my fingers. That first pan showed that indeed there was some very nice gold to be had here...
Successful Rally for Suction Dredge Miners in Idaho
Representative Paul Shepherd stopped by, and Idaho County Commissioner Jim Chmelik dove with one of the dredgers so he could see for himself that no harm was being done to fish or their habitat.
Prospecting With a Detector: Lessons Learned
That is the course and intention for this article—to wander through some of the lessons I have learned in my thirty-two years of metal detecting and prospecting.
A Few Tips and Tricks for Beach Mining
When you think about the extremes to which a miner will go to get a little gold, it occurred to me beach gold could be "easy pickings."
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The Bawl Mill
• Our Readers Say Re: It's Time to Get the Heck Out of China
• Ask The Experts - What’s the status of suction gold dredge permitting in California?
• Ask The Experts - How do I properly and safely dispose of blasting caps?
• Ask The Experts - How much silver per ton does it take to make a mine profitable?
• Ask The Experts - How clean do my gold concentrates need to be to pour a gold button or bar?
• Ask The Experts - What is the name and model of the old jaw crusher pictured in last month’s issue?
• Hard Rock 101: Mechanical Techniques
• Clearing the Nugget Trap with a Detector
• Resurrecting an Old Hard Rock Mine—Setting Up the Millsite
• Desert Prospecting Yields More Than Just Gold
• Memories of Shirttail Creek, Northern California
• Indictments Pile Up for Gold Traders
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
Free:
Seeking The Truth—A Letter From the Editor
• Legislative and Regulatory Update
• PLP Update: The Path for Legally Re-Starting Suction Gold Dredge Mining in 2021
