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...
Tasmania (The Apple Isle) is a large, heart-shaped island off the southeast coast of Australia. Open farmlands and forests are found on the north and east coasts tending to more rugged terrain on the west and south coasts. Good roads service the entire island except the southwest corner.
Narrowing down a closure date will allow you to check the commodity price during that time and possibly confirm that a low price, rather than a lack of ore, was the driving force that closed the operation.
• California dredging update
• On a related issue, SB 233
• EPA and greenhouse gases
Barrick Gold Corp. is moving forward with the reopening of the Ruby Hill gold mine at Eureka, Nevada, and intends to begin work next month on a new power plant in western Nevada.
Bullion River’s high-grade gold mine at French Gulch, near Redding, California, may be in some ways the last of the Mohicans, or perhaps it is the first of the great revival, but for the near term it is probably destined to be a little bit of both.
Alaska is getting a lot of interest these days, not least because of all the gold prospecting shows on television. Hardly a month seems to pass without some new prospecting show being announced, and a couple of the most popular feature Alaska.
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