History & Geology
The Downieville Gold District
January 2011 by Chris Ralph
Many locals are just waiting for California to allow dredging once more, especially with the current gold prices. There are still plenty of good opportunities for prospectors in this area, just as it has been for so many years.
Gold in Quartz
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.
Picks & Pans: Gold Recovery in Placer Mining Operations
Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.
California: The Land of Big Nuggets—Part I
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
The Giant King Mine
Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.
The Goldfield Mining District, Nevada—Part I
An example of some of this extraordinary ore was a lot of about four tons from the Florence mine during the last days of a lease that averaged over 300 ounces of gold per ton.
Alaska: Kodiak Islands Mineral Resources
The fresh material is worked and concentrated by the waves on the flat, wide beach platform. The waves wash away the lighter minerals, leaving the heavies near the bluffs and in depressions on the beach.Flood Plain Gold Deposits—What Are They Really?
We just completed a trip to another river, and yes, there was definite movement and redistribution of gravels, and other prospectors have seen this as well.
Subscription Required:
The Bawl Mill
• Our Readers Say
• Ask The Experts—Amalgamation
• China Gold Imports Increased 500 Percent in 2010
• Tips for Effective Drywashing
• Legislative and Regulatory Update
• Rattler's Gold
• Successful Gold Prospecting
• US Mint to Offer Other Precious Metal Coins
• The Business of Mining: Unlimited Possibilities With LLCs
• Silver Boom Prompts Idaho Mine Expansion
• Melman on Gold & Silver
• Mining Stock Quotes & Mineral and Metal Prices
Free:
Great Panther Silver
• Oregon Miners Take DEQ to Court, Again
