Critical Metals: Copper
May 2012 by Chris RalphFrom time to time I’ve been doing a series on critical metals and how important they are to our complex and technological society. This month we are going to take a look at copper, and how important that metal is to our modern lives.
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!
Exploration for and prospecting in search of similar deposits should focus on rhyolite bodies located in fluorite-bearing areas.
The hair stood up on the back of my neck when I saw this, especially the nice patches of wash in the bottoms of the gullies, a sure sign of an auriferous source being nearby.
…to see the huge differences between the gold production amounts of the Western States, let’s look at the gold production—both hard rock and placer—of these 13 states up to the present.
Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.
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.
...we will continue our examination of the rich streams and mining districts, and then take a look at some of the big nuggets that have been found here.
The Bawl Mill • Ask the Experts: gold per ton; improving assay method • Bering Sea Gold—Part II • Tucson Show Marketing • Ganes Creek Hits 10 Years—Part I • Fabulous Florence—The Golden Town of Idaho • Arizona's Vulture Gold Mine and Lost Dutchman • Replacing Your 12-Volt Pump • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices