History & Geology
What Are Those Rocks In My Pan?
June 2011 by Jim Halloran
The placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.The Batteries Metal Rush
There is a major change coming in the economy of the world and now is the time for prospectors and miners to grab a ticket and get on board.
Ask the Experts: VMS ore
Q: Are there any mills that handle VMS ore?
Epithermal Gold and Silver Deposits
Epithermal deposits form in the ground at shallow depths. They are popular with prospectors because can yield very rich deposits and they are widespread in the Western US.
The Wild Rush to Find More Cobalt—Part I
While some future cobalt will come from recycling lithium batteries and other products, the coming huge need for cobalt is virtually a perfect storm of heavy demand and insufficient supply.
Confluence Placers
Confluences of placer streams are well known as concentration sites for heavy minerals. The basic reason is that...
The Miner’s Switchback
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.
"Gold Rush: Alaska" in the Porcupine Mining District
Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...
Subscription Required:
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
Free:
Gold Prospecting and Mining Summit
• Legislative and Regulatory Update
• Hands-on at Iowa Hill
• Good Research and Bad Luck
