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Throw-Away Gold: Back to Basics
February 2002 by T.D. LaRune
Placer mining, whether for profit or recreational purposes, involves separation of free gold from the gold-bearing sands (gangue) of alluvial deposits by methods using specific gravity. The free gold can vary from 17 to 19.3 in specific gravity terms, depending on the alloy mix, which is usually silver, but can be copper, lead, sulfur, tellurium, antimony, or mercury.Ask The Experts - Need assaying advice
Picks & Pans: Gold Recovery in Placer Mining Operations
Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.
Utility Agrees to Remove Four Klamath River Dams
PacificCorp, which owns four hydroelectric dams on the Klamath River, has agreed to terms for their removal, a key milestone in efforts to restore what was once the third biggest salmon run on the West Coast and end decades of battles over scarce water.
Legislative and Regulatory Update
• Idaho continues toward elimination of EPA suction dredging regulations
• EPA makes preemptive strike against Alaska mine
• Proposed Mines Act permit fees
Mining Stock Quotes and Mineral & Metal Prices
Ask The Experts
Is it possible to use a cell phone GPS away from cell towers?
Prospecting After Winter Storms
So, how much rain does it take to cause a major movement of gravels in a stream and redistribute the gold? The technical answer is enough water to move the bed load of the river.
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• Prospecting for Meteorites with a Metal Detector
• Aussie Gold—A Look at Victoria
• The Rand of South Africa
• Picks & Pans: Arizona Desert Drywashing Adventure
• 2001 World Gold Panning Championships
• Placer Gold Near Fairbanks, Alaska
• The "Drumstick"
• Company Notes
• Editorial
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
