High Sulfidation Epithermal Deposits
November 2019 by Chris Ralph
They tend to be big, coming in large to extremely large sizes. They can also be amazingly rich and produce huge amounts of very high-grade ore.
How rich does a hard rock ore have to be for it to be worthwhile to process and extract the gold?
The fact that mineral deposits can contribute specific types of heavy minerals is why the analysis of the heavy mineral concentrates in the streams of an area can be an important prospecting technique for finding undiscovered mineral deposits.
Historically, Montana has been an important gold producer, in terms of both lodes and placers, and it still produces gold for the prospector today.
There is a material processing principle widely used in large milling operations to improve recovery that is poorly understood by most of the micro-mining and prospecting community...
Ore testing and other advice for starting up a mining operation.
Besides the EPA issue, our major priority is to work on the proposed amendment to the National Strategic and Critical Minerals Production Act (S 145), a bill proposed in the Senate by US Senator Dean Heller (R-Nevada).
…we cheered and high-fived each other as the ore cart slowly crested the top of the headframe, then picked up a bit of speed on the short downhill section and came to an abrupt halt, ejecting its contents of ore…
The Bawl Mill • Ask The Experts - Seeking advice on setting up an operation and the agreement with the landowner • Montana Gold and Sapphires Revisited • A Third Generation Small-Scale Hardrock Revival • Gold Prospecting for Better or Worse: Respect the Angle of Repose • The Summer of ‘81 • The “Chuck It Out” Nugget • Gold and Silver Deposits of Bodie, California • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices