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Platinum in Laccoliths
May 2003 by Edgar B. Heylmun, PhD
Laccoliths are unusual igneous features that seem to occur in the stable interior parts of continents. They are concordant igneous intrusions that have domed the overlying rocks and are circular in plan, and less than 10 miles in diameter. This article deals with some of the laccoliths found in the scenic Colorado Plateau province of Utah, Colorado, and Arizona...The Tangential Impulse Water Wheel in California Gold Mining History—Part II
Even before Pelton relocated in San Francisco in 1888, many other competitive foundries and machine shops chose to enter the water wheel market. These firms were already busy with the mining trade, producing hoists, stamp mills, ore carts, Cornish pumps, crushers, grinders, compressors and drills.
Prospecting for Hardrock Platinum, Nickel & Copper Deposits
Recent sharp price increases for copper, nickel and platinum group metals (PGMs) have greatly stimulated exploration for these metals, and individual prospectors have made important discoveries of new deposits.
Benton’s Rich Silver
Prospectors looking for the next Comstock Lode tried mining for silver in the Benton Hot Springs area in California in 1862. On a ridge southeast of the town, they found what they were looking for—rich hornsilver.
Ask the Experts: Ionizing mercury
Q: What exactly does "ionizing" mercury mean?
Ask The Experts: Is there a safe DIY alternative to cyanide or mercury for extraction?
Q: With safety as a given, what can the average miner, or Joe-blow greenhorn do to identify and extract some metals or minerals with off-the-shelf products or natural ingredients?
Mining Pegmatite Deposits
With successively lower temperatures as the water mixture cools, new sets of minerals are formed and many of those stable at a higher degree of heat became subject to alteration as the temperature progressively moved lower.
Mining Stock Quotes & Mineral and Metal Prices
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