More Tips for Evaluating Ores
July 2007 by Charles L. ButlerTabling and jigging are two relatively inexpensive methods for recovering the “free particle values” from the noble metal ores. However, not all ores contain their values as free particles. In fact, many ores contain appreciable amounts of “metallic salts” that readily dissolve in one’s system water and continue to migrate right along with this water.
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.
• Roadless Rule back in play
• Action needed on SB 670
• Abbey recommended to head BLM
• Capped and jobless
• S 787
• SB 796 & HR 699
• Nevada proposal to cap tax deductions for mining businesses stalls
• NEPA gets a much needed update
• Army Corps to release review of Pebble Mine
The Bawl Mill • Ask the Experts • The Mountain Gate Mine • The Basics of Small-Scale Heap Leaching with Cyanide Part I—History, Suitablility and Permitting • Oregon Suction Dredge Permit Update • In Pursuit of Gold and Silver in the Sierra Madres—Buying the Pilot Mill • Life in the Alaska Gold Rush • More Small-Scale Miners Attracted by Gold Prices • Gold in New Zealand • Ready “Ore” Not, Uranium Boom is On Again • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices • Looking Back