Our Readers Say
August 2005 by Staff• Re: ICMJ's Mine Market ads
• "The enjoyment of prospecting"
One hundred and seven years ago the world’s first electric-powered bucket line dredge started to work in Montana. This summer, Montana likely saw its first solar-powered Denver Gold Saver put to work.
Most 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...
Skarn consists of coarse-grained calcium, magnesium, iron, and aluminum silicates formed by hydrothermal solutions, which replace limestone or dolomite near the contact with an igneous intrusion. The contact metamorphism is usually caused by an intrusion such as quartz monzonite, granodiorite, or similar rock type, which may or may not be mineralized.
Ask The Experts—Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold?
Q: Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold? Or do the two go hand-in-hand?
Goodnews Bay Platinum Mine, owned by Hanson Industries in Spokane, Washington, has resurrected a 60-year-old bucketline dredge to claw the steel-gray metal from the river drainages around Red Mountain on Cape Nushagak.
The next morning, I retrieved the compressor and again attacked the sticky head bolt. As if by magic (and some applied physics) the head bolt sighed and finally broke loose.
The Bawl Mill • Greenstone Belts in Minnesota • The Paradox Basin—Part II • A Sleeping Giant • Buying a Used Gold Dredge • Looking Back • Gold in Vermont • Picks & Pans: Prospecting on Perry Creek • 9th Circuit Court Hears Pilgrim Family Case • The First Mine in America • National Mining Hall of Fame to Induct Five • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices