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The History of Gold Mining in Sierra County
February 2010 by Frank Lorey III
There may be some truth to some of the fantastic claims. The Ruby Drift Mine near Forest City is where 159 nuggets were taken out between 1937 and 1942—a total of about 1,000 ounces with an estimated value of $1.5 million when gold was...
Mining Firms Uneasy Over Bolivia
Bolivia’s plan to nationalize its natural gas industry and exert greater state control over all of its natural resources has North American mining companies fretting over their future prospects extracting the nation’s rich resources of gold, silver and tin.
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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.
Company Notes
• Newmont Mining Corp.
• Manhattan Minerals Corp.
• Phelps Dodge Corp.
• Gammon Lake Resources Inc.
• Glamis Gold Ltd.
• Quadra Mining Ltd.
• Freeport-McMoRan Copper & Gold Ltd.
Testing Ores for Free Gold
I get a number of questions from people about testing and treating hard rock ores. The simplest way, but also an expensive one, is to just have an assay test done by an independent assay firm. As an alternative...
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