November 2015 by Hank Chapman, Jr.Once all the numbers from all the samples and water tests are compiled, a snapshot of the performance of each tank in the process circuit can be seen side-by-side.
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.
The ideal leaching chemical would leave behind what we don't want or need in the ore and take only the valuable metals.
• Homestake Mining Company
• Placer Dome Inc.
• AZCO Mining Inc.
• Guyana Diamond Corp.
• Canadian Mining Company, Ltd.
• Hecla Mining Company
• Pan American Silver Corp.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
This assay system of ounces per ton sounds simple enough, but the use of the metric system and the additional measuring terms of “grams per ton” and “parts per million” (ppm) has created some misunderstanding of ore value.
Let’s take a look at these important property aspects individually, because they all affect the value of a property and how much mining companies might or might not be interested acquiring it.
I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...
The Bawl Mill • Ask The Experts • Ask The Experts • Our Readers Say • Gold in Tertiary Gravels • Detecting Clay Seams • Associated Gold Placers of the Comstock • All About Minerals • MMAC & PLP Update • Feinstein Pushes for Million-Acre Land Grab • Prospecting for Liberated Gold • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices