Utah's Crescent Creek Placers
November 2009 by Alan J. ChenworthThe Crescent Creek placers are considered to be one of Utah's few commercial grade placers, but they are marginal and difficult to work at a profit.
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
• US Supreme Court may consider requirements for Notitce of Intent
• Oregon considering mining restrictions
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Gold in Guyana—Part II: Process Optimization at Sacre Coeur Minerals' Lower Puruni Alluvial Mining Project
In Part Two of my two-part series I describe the mechanized alluvial gold mining operation on the lower Puruni River launched by Sacre Coeur Minerals in 2011.
Rotten rock (saprolite) can be found in all warm, humid regions, but is best developed in humid, subtropical climates, like that found in the American South. Outwardly, it looks like bedrock, but upon closer inspection, it can be seen that roots penetrate it and that it can be worked with a shovel or hydraulic monitor.
The first time I flew into the Juneau area in southeastern Alaska, I was about 5 years old. I recall it was raining and the clouds hung low over the tall mountains. I was sure we’d crash and couldn’t see how the...
The Bawl Mill • Molycorp Minerals Reopens Mountain Pass Mine • The Business of Mining—Home Office Tax Deduction • Peshastin Creek, Washington • Michigan Proposal Would Restrict Mining Operations • No Gravel, No Gold • Nevada Regulators Reach Agreement With Queenstake Resources • Stillwater Recovers Without GM’s Business • Gold Has Shown Its Mettle, But How High Can It Go? • Utility Agrees to Remove Four Klamath River Dams • Melman on Gold & Silver • Mining Stock Quotes & Mineral and Metal Prices