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How PGMs Affect Assay Beads

Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...

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Forest Service Final Rule—When is a Notice or Plan Required?


On June 6, 2005, the Forest Service published a Final Rule regarding section 36 of the Code of Federal Regulations Part 228 (36 CFR 228) titled, “Clarification as to When a Notice of Intent to Operate and/or Plan of Operation is Needed..."

Gold Deposits of the Ivory Coast


Ivory Coast has considerable gold reserves, and this nation has the largest area of greenstone belts prospective for gold in the continent.

Pay Attention to the Features and Landmarks


People always ask me what is so important about locating contact zones. The answer to that: Gold.

Ask the Experts


• What to prospect with on the Klamath River

South Yuba River Recreational Area


Within 30 minutes, a nice, coarse nugget popped up right in the gold pan, and the rush was on! We worked hard for the entire day. Though some pans were not as good as others, the gold was good enough to...

Will El Nino Move Gold for Miners and End California Drought?


I remember in the couple of years after that 1997 flood, prospectors around California did very well, taking ounces of gold from places that had not yielded any gold for years before that.

Using Geologic Publications to Discover Collecting Sites


I understand that a person without geological knowledge could be daunted reading a geological publication. You can pick out the good stuff from a geological publication without a lot of geological knowledge.

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