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Greenstone
August 2004 by Edgar B. Heylmun, PhD
Greenstone is a hard, tough, altered igneous rock, usually dark green in color. The term “greenstone” has been loosely applied to all greenish rock, including peridotite, dunite, jade, serpentine, and even hydro thermally altered rocks in mining districts. True greenstone is...Beach Mining for Placer Gold
What I saw was a beach area that was just completely covered in black sand. Rubbing my hands close together like a kid in a candy store, I could not wait to get set up.
Digging It Dry
I believe dry washing is an underappreciated prospecting method. There are plenty of places where there is some pretty decent gold to be had, but the spot is a long way from any water and dry processing may well be the best way to go.
Tips for Effective Drywashing
Back in October I read with great interest Chris Ralph’s article on the use of a metal detector while drywashing, and I wholeheartedly agree—I wouldn’t even consider going drywashing without using a metal detector in conjunction...
Mining Claim Maintenance Fee Due
For miners holding a mining claim, mill site or tunnel site on public lands, August 31, 1999 is the last day to meet the annual filing requirement and pay the $100 maintenance fee to the Bureau of Land Management.
Gold Placers in Italy
Gold is a fairly widespread mineral in the Italian Alps and in the Northern Apennines. It is found both in primary mineralization and in past and recent floods.
Hidden Features in Venezuela
Venezuela is considerably larger than the state of Texas and is located on the north coast of South America. The capital city of Caracas (pop. 4 million) is some 2,135 miles south of New York City. Most of the population is in the northern half of the nation, with paved highways connecting the principal cities and towns. The Orinoco River flows through the southern and central parts of the country, and much of the travel into the interior is along that river and its tributaries.
Using Mineral Deposit Models
Mineral deposit models have been used in mineral exploration for thousands of years. They were obviously not called models as we use the term today, but the idea of accumulating data to predict mineral deposits is the same. Models can be valuable tools in mineral exploration and assessment and are routinely used by major mining companies in locating and evaluating mineral deposits.
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