April 2005 by Edgar B. Heylmun, PhDMost oilfields are found in anticlinal faults, or stratigraphic traps. Oil floats on water, so that it will rise to the highest point possible, above the water. If the porous or fractured sandstone or limestone that contains the oil is overlain by impervious shale, the oil can no longer rise. If the porous bed is arched upward...
The biggest obstacle is that like many streams on the Kenai Peninsula, high water during the summer months from snow melt and rain can make dredging nearly impossible. The best dredging is in the colder months of the year.
The Bureau of Land Management announced an increase in location filing fees and annual maintenance fees for unpatented mining claims, mill sites and tunnel sites.
Two companies are looking to mine the largest known iron ore deposit in the West—a 50-year supply at a rate of 1 million metric tons a year.
The Rattlesnake Hills (RSH) in central Wyoming had been overlooked for gold, even though it had all of the earmarks of being a major gold district.
There is a sizable area that straddles the U.S.-Mexico border where native silver occurs in shear zones at relatively shallow depths. The district is in the low but rugged Pajarito Mountains, the highest point of which is 5,838 feet at Cerro Ruido, on the Mexican side. The deceptively rough terrain forced the first border surveyors, in 1855, to kill several mules and horses because of their injuries.
• Homestake Mining Company
• Placer Dome Inc.
• AZCO Mining Inc.
• Guyana Diamond Corp.
• Canadian Mining Company, Ltd.
• Hecla Mining Company
• Pan American Silver Corp.
The Bawl Mill • Our Readers Say • Progress Report on Washington State Small-Scale Regulations • Pediments • Bill to Allow Mining of Coeur d'Alene Basin • Dredging Below the Homestake • Looking Back • Picks & Pans: The Glory Hole • Enthusiastic Crowds at PDAC • Fraser Institute Survey Results Rank Best (and Worst) Mining Locales • Small-Scale Prospecting & Mining (A Little History) • Higher Zinc Price Creates Opportunity • Government Appeals Miner Injury Case to Supreme Court • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver