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US Files Charges Against Gold Refiner

Authorities filed criminal charges against one of the largest gold refiners in the United States, accusing the company of participating in an illegal, $4.5 million money-laundering operation involving tainted gold from South America for at least four months.

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Critical Metals: Zinc


In this article, part of an ongoing series taking a look at critical metals in our economy, we will examine the mining and use of the metal zinc.

Melman on Gold & Silver


I find it difficult to recall a period when the world has encountered so many simultaneous threats which “should” have driven gold and silver higher, and yet the precious metals markets—so far—have failed to rally to any significant extent.

Ask the Experts—How do I remove gold from black sands?


Q: I’m a fairly new dredger. I was told that the black sands contain fine gold that is tough to see and recover, so I have been saving the black sands when I do my clean up. What method should I use to get the gold out?

Just One More Time


We chose this particular area because an old channel had run here at one point and had been heavily worked on top of a mountain hilltop. Erosion patterns cut deeply on each side, leaving the channel exposed. The erosion cut sharply, dropping into ravines far below.

Epithermal Gold-Quartz Veins


The great mining geologist Waldemar Lindgren used the word “epithermal” to describe a type of quartz vein commonly found in desert regions of the United States and Mexico.

Evaluating a Placer Discovery


Gold mineralization is usually first noted in an area by examining material weathered from the source and liberated or washed downhill from it.

State May Re-Examine Plans on Dredge Use Near Hope


The State Division of Governmental Coordination said it should have been asked to review the project a year ago to make sure the mine complies with the Alaska Coastal Zone Management Plan.

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