History & Geology
The Many Facets of Iron
March 2013 by Bill Rich
I’ve been fascinated by iron minerals for many years. So let’s take a look at this very interesting and colorful element.
The Rochester Mining District of Nevada
Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...
Ask the Experts: VMS ore
Q: Are there any mills that handle VMS ore?
Glaciers and Placer Gold Deposits
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
California: The Land of Big Nuggets—Part II
There are a number of Tertiary river channels in the area, most of which trend south-southwest. They tend to be steep, narrow, and rich with coarse gold.
"Gold Rush: Alaska" in the Porcupine Mining District
Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...
Greenstone and Gold
Contacts, faults and zones of weak rock are all places that can act as a pipeline to convey gold-bearing fluids, leading to valuable deposits.
Sierra County Gold—Part I
...this county contained some of the richest placer ground found in all of California and still produces some pretty impressive finds to this day.
Subscription Required:
The Bawl Mill
• Ask the Experts
• Ask the Experts
• Ask the Experts
• Ask the Experts
• Ask the Experts
• Legislative and Regulatory Update
• Gold Deposits of Montana
• Benches and Fossil Placers
• Turning Hobby Mining into Business Mining
• Buying a Mining Claim: Questions to Ask
• Looking for that Hidden Placer
• And the Survey Says...
• $50 Million Swiped in Diamond Heist
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
