History & Geology
Alaska: Kodiak Islands Mineral Resources
March 2016 by Jim Halloran
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.
Ask The Experts
Q: Is this gold or some other metal?
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.
Critical Minerals: Titanium—Part II
There are both hard rock and beach sand types of titanium deposits, but the hard rock deposits need to be at least 10 percent titanium while the beach sands often are economic with only two or three percent titanium.
Alaska's Cripple Creek Mining District
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.
The Birimian Greenstone Belts of West Africa
A few years ago I had a tremendous opportunity to visit Australia and hunt for gold there. The geology of the gold deposits there was somewhat different from what I was used to here in the US. I learned a lot about greenstone belt gold deposits while prospecting them in person, and it was an amazing trip.
All About Minerals
There are several common ways that new mineral crystals form and grow. Perhaps the simplest is when minerals form through the cooling of molten rock and the atoms bond together into mineral crystals.
The Goldfield Mining District, Nevada—Part II
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.
Subscription Required:
The Bawl Mill
• Legislative and Regulatory Update
• Ask The Experts
• Ask The Experts
• Ask The Experts
• How to Stake Your Own Mining Claims—Part I
• Addressing EPA Overreach: What Dredgers Need to Know
• Green Valley Gold District, Payson, Arizona
• Nevada's Silver City Gold District—Part I
• Enrichment of Mineral Deposits by Weathering—Part I
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
Free:
Ask The Experts
• MMAC & PLP Update
