April 2012 by W. Dan HauselThree homonyms come to mind when I think of gemstones, gold and vegetables: carrot, carat and karat. Let’s look at carrot first.
I’ve been taking a look at the mining and uses of a number of critical metals in series of articles, and it’s time to take a look at antimony.
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.
Arizona is well-known for its copper-gold porphyries and massive base metal-gold sulfide deposits such that primary gold deposits in the state are often overshadowed.
Plumas County has a rich heritage of gold mining, much of it from placer deposits that can still be searched and panned today. Being at the far northern end of California’s famed Mother Lode, it is quite often overlooked by those searching for gold today—really a well-kept secret after all of these years!
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.
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
Not all of these slides and debris flows will produce results, but if you search for these while prospecting in your gold producing areas, then you can increase your odds of finding new gold.
The Bawl Mill • Ask the Experts • Ask the Experts • Revisiting an Old Mine in Idaho Reaps Rewards • Today's MSHA • Following Clues to a Lost Gold Deposit—The Northern Extension of the Cedarberg • Bering Sea Gold—Part I • Safety With a Tax Deduction • Who Says You Have to Own a Claim to Find Gold? • US Policies Holding Back Arizona • Judge Gives OK to Nevada Mining Tax Initiative • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices