A Test Grid Dredged for Gold Values
June 2018 by Bill Bohan
The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.
Each specimen is carefully examined to determine if it would be beneficial or not to use an acid treatment to reveal more of the gold.
Most small-scale miners want to know how they can set up a system much more cheaply. The difficulty is in the balance of putting together a decent small-scale system at a reasonable cost.
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.
In last month’s issue we covered the initial discovery of gold, the subsequent gold rush that occurred around Nome, some of the geology of the area and past production. We’ll conclude the article in this issue with a further examination of the geology and deposit types, discuss the resources...
The next hurdle to jump was whether the trommel motor would start again after sitting on the desert for six years without being started. The last time it had taken a three foot pipe wrench to bust it loose.
Historically, Montana has been an important gold producer, in terms of both lodes and placers, and it still produces gold for the prospector today.
“The evidence is clear—mineral deposits alone are not enough to attract precious commodity investment dollars...”
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - Are there different “ferro” products processed out of the ore? • Ask The Experts - How hot does a furnace need to be to get rid of sulphides? • Ask The Experts - Will this paystreak be downriver off the trailing edge of bedrock? • Putting Together A Small Free Gold Mill—Part II • Chasing Float Gold—The Starry Night Wash • 2018 National Mining Hall of Fame Inductees • Michigan House Votes to Give Mining Operations More Flexibility • Mineral Exploration On The Rise • 18 Acquitted in Massive Brussels Diamond Heist • Captain Obvious Strikes Again • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices