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Looking Back
April 2005 by Staff
Excerpts from CMJ published 50 years ago this month.Time for a New Approach: Detecting Float Gold
The first pieces found were in a spot that most gold hunters would not even detect, right in the middle of a downslope meadow.
Critical Minerals: Titanium
The metal is expensive, not because it is rare but because of the expense to produce and work it. The minerals mined for titanium are all oxides, unlike many base metals that are mostly mined as sulfide minerals.
Throw-Away Gold: Back to Basics
Placer mining, whether for profit or recreational purposes, involves separation of free gold from the gold-bearing sands (gangue) of alluvial deposits by methods using specific gravity. The free gold can vary from 17 to 19.3 in specific gravity terms, depending on the alloy mix, which is usually silver, but can be copper, lead, sulfur, tellurium, antimony, or mercury.
Gold Dredgers Rescue Threatened Fish
Gold dredgers were enlisted in an effort to salvage a rare stretch of chum salmon spawning grounds along the Columbia River between Vancouver, Washington, and Portland, Oregon.
Gifts of Gold for University of Zimbabwe
The design of the makorokoza’s handmade wooden pans has not changed over the centuries. Until Rege introduced it to them they had seen nothing like a spiral wheel concentrator.
The Mineral Range Districts of Utah
Most of the commercial mineral deposits are on the south and southwest part of the range between Minersville and Milford, though small amounts of gold and silver have also been found in iron-rich outcrops in the basalt to the south of Milford.
Divide and Conquer—Detecting Old Placer Grounds with Friends
He no sooner had turned around and started moving when I hollered again that I had another nice one.
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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
• Picks & Pans: The Glory Hole
• Enthusiastic Crowds at PDAC
• Fraser Institute Survey Results Rank Best (and Worst) Mining Locales
• Synclinal Oil
• 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
