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The Seven Troughs Mining District


The favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.

China Closing More Than 1,000 Mines


It was only a few years ago that China was taxing and limiting quantities of exports for rare earths in an effort squeeze the market, drive up prices and extract the most in the way of income.

Care and Lubrication of a Model 13 Laboratory Wilfley Table


A Wilfley table works best when all of the mineral being run across it (the pulp) is about the same size.  For this reason, I took a good look at each of the samples.
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Progress Continues in Honduras


He had meetings with Honduran officials at all levels, set up a new corporation called Raptor Mining in El Corpus, Honduras, and is in the process of establishing a non-profit called “Step Up for Honduras.”

Northwestern Alaska Mineral Resources


Gold and jade are actually only minor mineral resources for the Northwestern Alaska region as a whole. Modern prospecting has focused more on base metal than precious metal resources.

Company Says Central Idaho Project Feasible


...the federal agency is intrigued by a plan that might result in cleaning up the area without cost to taxpayers.
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Canadian Company Recovers 1,111-Carat Diamond


It is the second largest gem-quality diamond in history, after the 3,106-carat “Cullinan Diamond” was recovered in South Africa in 1905.

The Snapshot


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.

The Bucking Room


Since this position was the least desirable due to the hard physical labor, the bucking room was used as punishment. Do you have a mediocre worker? Bad attitude? Off to the bucking room!
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Modern Mining Reclamation


A study showed that between 1930 and 1980, only a quarter of one percent of the land in the United States was used in all mining applications combined, including surface mining, tailings disposal, underground mines, and all mineral processing facilities.

Iron Ores and Iron Mining


For more than 40 years, iron ore prices have been decided by private negotiations conducted between the largest of the iron miners and the largest steel producers. These two sides dominate both the spot and contract iron ore markets.

Surviving The Boom and Bust Cycle


Back when I was in college, when I first started classes, the demand for new engineers was so strong that every graduate had multiple job offers without even trying.
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Prospecting for Silver Deposits


In some ways, silver is the forgotten precious metal because it straddles both the world of precious metals and jewelry, while having many important  industrial applications like a base metal. The price of silver reflects both the precious metal investment demand as well as the industrial demand.

Gold and Rare Earth Elements in New Mexico


We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.

The Basics of Froth Flotation


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.
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The Montanore Copper and Silver Project


This adit will be nearly 3.5 miles long when it reaches the ore zone.

The Gold, Silver and Base Metal Mines of Eureka, Nevada


...the area around Eureka, Nevada is well mineralized and seems to have a bright potential for future production of all sorts of metals.

The Ely Copper-Gold District of Nevada


The main ore deposits of the Ely district are associated with an east-west belt of altered and mineralized rocks measuring about one mile wide that extends 8 miles westward from Ely.
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Designing and Evaluating Placer Gold Recovery Plants


For this article, I am focusing on industrial production plants that can handle 10 cubic yards per hour or more and would be fed by a loader or other heavy equipment...

Appeals Court OKs Permits for Upper Peninsula Mine


The $800 million project will provide 300 jobs during production. It will be the only US mine where nickel is the primary targeted mineral, with about 360 million pounds to be extracted.

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