Glaciers and Placer Gold Deposits
November 2016 by Chris RalphIt also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
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.
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.
Lately my mind has been involved with group 4 of the transition elements, namely titanium, zirconium, and hafnium. They all have similar chemical properties. Of greatest interest to economic geologists and miners is that these valuable elements often occur together in sands.
In this second part on cobalt, I will take a look at the various types of cobalt deposits and how you can prospect for them. Who knows—perhaps the next big cobalt strike will be yours.
The area was mined intermittently from around 1900 to 1915, but was also mined in the late 1800s, with a total output valued at about $100,000, which is around $9.5 million at the current gold price.
The Reno Masonic Lodge was built along the railroad tracks back when Ulysses S. Grant was president and shortly after the Comstock Lode of gold and silver was struck in Virginia City.
The large buckets were favorable for the type of ground worked. The gravel was tenacious and compact, due to the existence of irregular pockets of clay.
The Bawl Mill • Our Readers Say • Legislative and Regulatory Update • Detecting: Small Creek Yields Good Gold • Ask The Experts: Is this BLM demand legitimate? • The Challenge of Winter Dredging • What Have You Got to Lose? • MMAC Update • How to Upgrade Your Pocket Plunger • What's In A Name? • Oregon Miners Still Fighting • Greenhorn Finds Gold in Colorado • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver