What Are Those Rocks In My Pan?
June 2011 by Jim HalloranThe placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.
There were some exceptional times in the far-flung history of the West. Rich finds of minerals that set men’s souls ablaze. From the rich gold fields of California, men who arrived too late to find riches went searching in every direction. The trail that we will follow leads east, past the shining silver district of the Comstock Lode.
For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.
The truth is that cemented gravels are really not all that complex. There is no mystery of how gold grew there or somehow wormed its way into these solid gravels.
Common thought is the switchback slows the velocity of the rushing water and gold drops out from the cut bank to a fill gravel bar within or below the switchback. I am not going to disregard that model; however, I hope to improve upon it.
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.
A few quick calculations show that approximately 11 tons of gold are lost each year just in the manufacture of new cell phones.
While the bullion value of the nugget is already substantial, the size and rarity of the Ausrox Nugget combine to make its worth invaluable in the collector market.
The Bawl Mill • Dredge Mining—Current Situation in Idaho • Fault Zones and Prospects • "Gold Rush: Alaska" in the Porcupine Mining District • Wyoming's Billion Dollar Nugget—The Trilogy Ends • Melman on Gold & Silver • Mining Stock Quotes & Mineral and Metal Prices