Prospecting & Detecting
The Essentials of Dry Washing
August 2013 by Chris Ralph
Most dry washers have a feed rate adjustment. It needs to be set so that the material flows evenly over the riffles and does not bury them.
Proper Assaying of Placer Samples
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
An Alaskan in the Lower 48
Our destination was some old hydraulic workings where the old miners had washed literally mountains of material away to expose gold in ancient river channels.
Using Geologic Publications to Discover Collecting Sites
I understand that a person without geological knowledge could be daunted reading a geological publication. You can pick out the good stuff from a geological publication without a lot of geological knowledge.
Advantages of Modern Prospectors
Modern-day placer miners have many advantages over the prospectors of the gold rush days. Our prospectors can reap many benefits from accumulated knowledge of the last 100 to 150 years, which is a long and impressive list.
The Significance of Nuggets in Placers
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
Ask The Experts
Can a metal detector be used to find limonitic gossan material?
Sniping for Gold
Sniping for gold… what does it mean to you? To me, sniping is taking a mask and snorkel along with a screwdriver and squeeze bottle to search for gold lying on or in bedrock.
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• Common Mistakes of the New Detectorist
• The Pearce Mineralized Area, Dragoon Mountains, Arizona—Part II
• Mining for Gemstones and Mineral Specimens
• Fighting and Winning Without a Lawyer
• Fortymile, Alaska Prospecting Adventure
• Court Says Emergency Rule in California Unjustified
• Sampling Placer Stockpiles
• Lower Prices Bring Layoffs
• Prospecting Research
• Buyer Beware! Counterfeit Metal Detectors
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Underground in the Original 16-1 Mine
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