Prospecting & Detecting
Prospecting Underground: Use Caution
April 2011 by Don Robinson
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.California to Allow Suction Dredging in 2019?
There are a few questions you will need to ask yourself before you apply for a suction dredge permit from the State Water Resources Control Board.
Potholes and Other Bedrock Traps
Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
Uphill Battle Continues for California Dredgers
There are currently three controlling agencies or entities over suction dredging in California—and you can make that four if the state legislature decides to further muddy the waters with additional legislation to block suction gold dredging in the state.
Proper Placer Sample Processing
...your sampling procedures should not be designed to catch gold your mining technique will never recover.
The Essence of Gold Prospecting
When doing your initial armchair research and selecting potential areas to explore, consider all the indicators, both natural and man-made.
This is Why You Check Your Tailings
The nugget was cast aside with larger rocks during the screening process, but it was found later by an employee...
Underground in the Original 16-1 Mine
These days they employ the use of metal detectors and carefully scan the shattered rocks, hoping to hear that sound we detectorists love to hear.
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• Mining Claims—What to Know Before You File
• Small-Scale Concentrating and Recovery Methods
• 5th Circuit Ruling May Benefit Miners
• Indicator Minerals for Gold & Silver
• Mud Men: Pocket Miners of Southwest Oregon Part III
• Legislative and Regulatory Update
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Silver Mining Returning to Texas
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A New Look at Old Mines
• Proposed Regulations for California Suction Dredging
