All Articles
Precious Metals in the Patagonia Mountains
August 2003 by Edgar B. Heylmun, PhD
The Patagonia Mountains are a small but rugged mountain range that adjoins the Mexican border some 9 to 16 miles east of the border town of Nogales. The range trends northerly for 14 miles and is about 10 miles wide, reaching an elevation...
Guest Editorial—California "Special" Dredge Permits in Jeopardy
by Dennis J. RaffExecutive Director,
Horseshoe Bar Action & Research (HBAR)
The Essentials of Dry Washing
Most dry washers have a feed rate adjustment. It needs to be set so that the material flows evenly over the riffles and does not bury them.
Nevada's Silver City Gold District -- Part II
May 2016...this district has had a continuous life of gold mining and milling that spans 150 plus years, and it appears that it will keep pressing on for many more years of production.
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Picks & Pans: Exploring Wyoming's High Desert
In an untamed and lonely part of Wyoming’s high desert sits a deposit of gold so large, and so vast, that even today its volume remains a mystery. With an aerial extent of over 10 square miles and a depth of nearly 7,000 feet...
The Business of Mining: Cars, Trucks and Tax Deductions
Most importantly, self-employed miners, prospectors or employees (even of their own mining-related business) who own or lease an automobile, can utilize the standard rate so long as they operate only one car at a time for business purposes.
Estimating Gold Values in Placer Gravels
The single most important question to be answered when evaluating a placer deposit is: “How much is it worth?” Accurate sampling of placer gravels is essential to obtain a reasonable estimate of the total gold values contained in the deposit.
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