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Small Mine Selective Blasting
January 2000 by Dr. Ralph E. Pray
Drill holes in a mineralized vein often penetrate hidden layers of poor ore which, after blasting, end up diluting the production quality. Disseminated gold ores carrying two ounces per ton may be identical in appearance to adjacent vein material...
Detector Prospecting Accessories
One of the first things to consider but that many people ignore is ergonomics. Prospecting for gold can involve long hours, often for days or weeks on end.Gold Indicators—What to Look for in the Goldfields
Some of the items that I’m going to go over are outcroppings, ditches, exploratory trenches and contacts/surface materials. I am going to speak about each of the above items in as much detail as I can, and then towards the end of this article I will tie them together.
Tantalum
Tantalum is a refractory metal which is non-toxic, ductile; easily fabricated, has a high melting point, is highly resistant to corrosion and is a good conductor of heat and electricity. It has the unique ability to transmit an alternating current in only one direction.
Pick Up Austria's New Coin—If You Can Lift It
The Austrian Mint recently unveiled its new coin—a 68-pound, 24-carat gleaming gold disc worth about $500,000—touting it as the world’s largest and a powerful investment tool.
Impact of Habitat Designations Grossly Underestimated
A UC Berkeley professor says the federal government is using an analysis method that seriously underestimates the economic impact of critical habitat designations for imperiled species.
The Bawl Mill
• Caught on camera...
• Taxpayers can’t go “cold turkey”
• Hurricane FEMA wipes out 1,800 homes
Brits Thwart Robbery of Gold and Cash
Armed officers arrested seven men near Heathrow Airport after they had overpowered staff at a warehouse holding £80 million ($236 million) in gold and cash and began loading gold into the back of a van.
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The Bawl Mill
• Over the Divide
• Our Readers Say
• Letter from the Editor to our Readers and Advertisers
• Administration Considers Bypassing Congress
• First Woman to Draw Mining Pension
• Mohave Mountain Placers, Arizona
• High Court to Reconsider Wilderness Water Rights
• Sixteen to One Takes on MSHA
• Picks & Pans: Gold Mining on Joie Osgood Ranch
• Gold
• Company Notes
• Millie's Tailings
• Placer PGMs in Alaska
• Mogollon—New Mexico's Remote Gold Camp
• ICMJ 9th Annual Photo Contest Results
• The Other Minerals of Mt. Diablo
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
