Sampling Placer Stockpiles
August 2013 by Jim HalloranSampling other people's stockpiles or dumps has some inherent risks that sampling undisturbed ground does not have.
The zone of influence of each sample must be carefully considered when deciding how far sample sites should be spaced from each other.
I love it when I am in the middle of a high trash area and all the ferrous bars go away, the screen number goes to a three or an eight, and the meter is forty to a hundred. I don’t know for sure that I have found gold, but it narrows the odds down.
Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.
Some will doubt its value given the ultra-fine particle size… Some will become encouraged about not having to incur significant time and expense to break rock.
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.
There weren’t as many pieces of gold, but what I did find was bigger. As I worked my way down towards the spot that I had been working the first three days, I noticed a large crack that crossed the river.
The Bawl Mill • Ask the Experts • Ask the Experts • Ask the Experts • Ask the Experts • 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 • The Essentials of Dry Washing • Fortymile, Alaska Prospecting Adventure • Court Says Emergency Rule in California Unjustified • 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