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Gold Deposits in Skarn
July 2003 by Edgar B. Heylmun, PhD
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.The Bawl Mill
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Fluorescent Mineral Prospecting
Ultraviolet light is divided into three levels, labeled A, B and C depending on the wavelength, with C having the shortest wavelength and the most energy.
Understanding Skim Bar Placers
Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.
Understanding and Evaluating Desert Mineralization for Nuggetshooters
The primary source of many dryplacers is from the weathering of small to large hardrock sulphide ledges to yield free-gold, soluble salts and iron oxides. Placer gold, both large and small nuggets, can be found from the top inch down...
Third Largest Nugget in Existence Returns to Dallas
While the bullion value of the nugget is already substantial, the size and rarity of the Ausrox Nugget combine to make its worth invaluable in the collector market.
Melman on Gold & Silver
Boy, do we ever live interesting times! What other conclusion can we come to when the only real excitement on the whole scene is a kids' book and a TV series about a bunch of people acting in a manner to make the word "weird" seem respectable!
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