The Geology of Diamond Deposits
May 2019 by Chris Ralph
New theories have been developed and they may lead to new discoveries and give prospectors some new insight on where to look for diamonds.
The Oatman/San Francisco Mining District’s historic gold production of 2.2 million ounces of gold since the 1880s makes this area Arizona’s greatest primary gold producing district.
...I would bet considerably more lode gold and silver remains to be found in this area, and there are possibilities for small placers and nugget shooting.
...the area around Eureka, Nevada is well mineralized and seems to have a bright potential for future production of all sorts of metals.
The majority of the gold produced in Goldfield has come from ores that are close enough to the surface to be oxidized by the air. This oxidized ore is normally a soft, shattered, earthy material usually stained yellow to brown by oxides of iron.
I recently had the opportunity to spend a day exploring around Butte, Montana and was amazed by the amount of mining that has taken place there. The old-timers called Butte “the richest hill on earth” and had pretty good reasons for doing so.
The Gold Rush in California called hundreds of thousands of souls to leave their homes to journey to the the far reaches of the West. At first the rich goldfields of the Sierra Nevada beckoned to these adventurous pioneers.
The process of recognizing ores all starts with being able to recognize some basic minerals and knowing what hard rock ore looks like in the districts where you prospect.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - Who owns this historic mill and how do I handle possible mercury contamination? • Ask The Experts - Sampling and assays • Keep Watch for The Unexpected • Resurrecting An Old Hard Rock Mine—Gold At Last! • Imagining the Ultimate Prospecting Adventure • Gold Prospecting for Better or Worse: Cold Gold • Gary It's There • Following the Clues • A Generous Lesson on Detecting Bedrock • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices