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A Working Arrastra
April 2004 by Dr. Ralph E. Pray
If everything you see, the men, the animals, the crude mechanism that grinds gold from rock, everything around you, looks to be from centuries ago, if the mysterious sound you hear is pure history and the smell around you is primitive, if the earth beneath your feet quivers with untold strangeness; and, the taste in your mouth sweeps time out of mind then, if all of this happens at once, if every one of your five senses has taken you into the past, then you’ve traveled back in time.Ask the Experts: gold per ton; improving assay method
Q: How much gold do I have per ton and how can I improve my assay method?
Hillside Placers
Hills and mountains that contain gold deposits will weather and erode over a long period of time, and the eroded material will move slowly downhill. Frost wedging and roots are two of several agents that can cause bedrock to be fractured and...
Diamond Exploration and Mining Heating Up in North America
Diamond exploration in Canada has led to a major new industry that did not exist prior to six years ago. Yet today, Canada ranks as one of the world’s leading producers of gem-quality diamonds.
Ask the Experts
• What's worth picking out of the pan besides gold?
1999 National Mining Hall of Fame Inductees
Ceremonies to induct 1999s nominees into the National Mining Hall of Fame will be held Sunday October 10,
1999 at the Adam's Mark Hotel in St. Louis, MO.
Commercial Placer Mining With Jigs
During the upward stroke, water is pushed up through the shot layer causing it to open up and lifting the gravel particles above. The heavier particles settle faster based on Stokes law, and move down into the shot bed layer, while the lighter...
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The Bawl Mill
• Our Readers Say
• Wyoming—A Land That Time (And Explorationists) Forgot
• Two Arrested in Alleged Mining Investment Scheme
• Wall-Rock Alteration
• Melman Reports From PDAC—News About India, China, and a Potential Shortage of Nickel
• Picks & Pans: Family's Identity Forged Working Nevada's Gold
• Researching Suitable Areas to Detect for Free-Milling Gold
• Training Videos From NIOSH
• The Golden Highway—Amador County
• Prospectores Unite in Washington State
• Flexible Circuits Possible From Gold Wire
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
