The Fire Assay of Carbon
February 2016 by Hank Chapman, Jr.Carbon, activated charcoal, or “char,” as some old timers refer to it, can be an assayer’s nightmare.
It all started with a phone call from my friend and prospecting partner Pat Keene. He told me that he knew of an investor who was just starting out in the gold industry and was looking for a gold consultant to go to Africa to prospect and analyze a 400 sq. mile concession in the middle of the Congo rainforest. I waited for the “just kidding” line...
Once I have established the presence of gold in the sample, I collect five-gallon bucket quantities of the rock material for processing back at my shop.
I thought it might be worthwhile to take a look at the basics of this important mineral separation technique and how a miner can use it to recover the values out of an ore.
The zone of influence of each sample must be carefully considered when deciding how far sample sites should be spaced from each other.
One of the issues that prospectors run into when working to upscale from micro-scale hard rock testing to a greater production output, is that they often confuse individual devices or machines with systems.
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.
There are a few questions you will need to ask yourself before you apply for a suction dredge permit from the State Water Resources Control Board.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts • Ask The Experts • Ask The Experts • Ask The Experts • The Art of Underwater Nugget Shooting • Northwestern Alaska Mineral Resources • A Family Quest for Gold • MMAC & PLP Update • Determining the Amount of Gold in Rich Ores • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices
Gold in Quartz