Small Mine Selective Blasting
January 2000 by Dr. Ralph E. PrayDrill 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...
In Wyoming, garnets are often common where aluminum-rich (micaceous) rocks have been highly metamorphosed. Such rocks are recognized by abundant black (biotite), silver (muscovite), or green (chlorite) mica with periodic grains of red garnet.
There are many different ways to get the gold out. We will take a look a few examples of crushing and grinding, and potentially which ores they may be best suited for.
In 1914, Livengood went from a tent city to a collection of wooden false fronted structures and log cabins. In 1962, 48 years later, our old Chevy pickup rumbled in off the gravel road. A cloud of dust surrounded us as the hot Interior sun beat down on...
“It would be a real pleasure to be able to combine a successful mining operation with being of genuine service to the human condition.” Those words from CEO and Professional Geologist Robert G. Carrington set the...
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• Cubin wages battle over public lands decisions
• Washington State rivers are open, work continues
• Recent FWS habitat, endangered or threatened proposals
Exploration companies are actively looking for properties with profitable potential, even if the ground was once cast off as too low in grade to be economically viable. This is especially true in states that are reasonably friendly toward...
One of the largest conundrums we would point out is the matter of rising interest rates starting to take place in several nations.
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