All Articles
BLM 3809 Final Rule Implications
March 2001 by Scott Harn
Many readers of ICMJ have asked for more information regarding the BLM’s 3809 regulation changes that were pushed through just prior to the departure of the Clinton Administration.
The South Pass Gold Placers, Western Wyoming
In the 1980s, I spent 5 summers living in a tent in order to map the 450 mi2 South Pass granite-greenstone belt and many of its historic mines. While mapping, I was quite impressed by the general lack of development of lode gold deposits.
Enrichment of Gold Veins
Most of the world's great gold mines are in secondary (supergene) enrichments in veins and stockwork, brought about by physical and chemical processes.
Sierra County Gold—Part II
...we will continue our examination of the rich streams and mining districts, and then take a look at some of the big nuggets that have been found here.
The French Mines of El Boleo
Volumes have been written on the subject of mining in Mexico ever since the first Spanish conquistadors undertook to strip bare the newfound land in the 6th century. Gold and silver, which attracted Cortez and the Spanish Inquisition, was there for the taking, and the fabulously rich mines of Guanajuanto, San Miguel de Allende, Zacatecas, Real del Monte, San Luis Potosi, Durango and Taxco, among others, became famous throughout the New World and Europe.
Guest Editorial—Changing the Rules
Increasing restrictions on use of public lands are causing a widening tear through the country's economic and social fabric.
How to Interpret Assay Values
This assay system of ounces per ton sounds simple enough, but the use of the metric system and the additional measuring terms of “grams per ton” and “parts per million” (ppm) has created some misunderstanding of ore value.
Lost Canyon
The name makes you wonder, “Just how remote is this place?” It’s in the Tahoe National Forest and the Canada Hill Mining District, an area of steeply cut canyons that averages about 5,000 feet in elevation.
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The Bawl Mill
• Our Readers Say
• Gem Theft in Tucson
• Winter Dredging
• Selecting a Gold Recovery System
• Placer Diamonds in Venezuela
• Picks & Pans: Leon Always Finds the Most Gold
• Company Notes
• The Swift Shore Mine 1862—Present
• Placer Gold in the Black Hills, South Dakota
• Platinum and Diamond Discoveries Shine New Light on Historic Alaska Gold-Mining District
• GATA Update
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
