How To
Ask The Experts
December 2014 by Chris Ralph
• Determining the amount of gold in a specimenHard Rock University: Expensive Hobby or Real Business?
Improper sampling techniques lead to more avoidable heartache than almost anything else in micro mining.
Online Mining Classes Now Available at Mackay
The University of Nevada, Reno Mackay School of Earth Sciences and Engineering, Department of Mining Engineering has begun offering online courses for miners.
Hard Rock Milling: A Matter of Scale
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
How Long Does It Take to Find and Recover An Ounce of Gold?
Some ask if a prospector can collect an entire ounce in a day. It is possible; I’ve done it before.
Operation And Application Of Magnetometers
The technology used in these devices has advanced greatly in the last century. Many different types of physical effects are used to measure these magnetic fields and we will briefly look at some of these.
What To Do When Gold Recovery and Assay Values Differ
Before going into an analysis of the ore composition, two other major factors will affect the result. These are the accuracy of the assay and the effectiveness of the mill for the gold recovery.
High Sulfidation Epithermal Deposits
They tend to be big, coming in large to extremely large sizes. They can also be amazingly rich and produce huge amounts of very high-grade ore.
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• Guinea Africa: Gold, Ebola, and a Monkey Barbecue
• Finding Gold in Tailing Piles
• Small-Scale Processing of Hard Rock Ores
• 2014 Index - Annual Tables of Content
• Why Did This Silver Mine Close? - Pt III
• Melman on Gold & Silver
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