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Gold in Jasperoid
February 2000 by Edgar B. Heylmun, PhD
Jasperoid is a jasper-like siliceous rock, in which chalcedony or cryptocrystalline quartz has replaced limestone, dolomite, or shale. It forms the gangue of many important ore bodies. It is stained by iron and manganese oxides into shades of...
Zeballos Gold Camp, British Columbia
The mining and logging camp of Zeballos (pop. 272) is located on an arm of Esperanza Inlet, on the southwest side of Vancouver Island, British Columbia. Vancouver Island is 301 miles, by road, and reaches elevations as high as 7,249 feet.
Ask The Experts: Equipment to break up heavy clay
Q: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.
Never Take Safety for Granted
In retrospect, I can now see that the thoughtless breaking of one of my safety rules regarding not dredging alone was to be a lesson I won’t soon forget.
Hardrock in Downieville
A recent weekend trip found us leaving the Grass Valley, California area to meet up with some friends in Downieville.
MMAC Update
We spent our evening at some informal get-togethers at two private residences in the DC area, which provided the opportunity to talk with staff members from Congress, other agencies, and a few consultants working on public land issues. We found common ground with many of them, and found a strong ally in a former Congressman turned consultant who agreed that Mining Districts provide the smartest legal route...
Researching Suitable Areas to Detect for Free-Milling Gold
For hundreds, even thousands of years, gold has brought forth the worst as well as the best in the cultures of the world. It has pitted country against country, man against man, and brother against brother. There are countless tales...
Flat-Fault Gold in Sonora, Mexico
Mexico is not noted for gold, but is better known for silver and copper. However, the states of Chihuahua and Sonora, in northwestern Mexico, contain some sizeable gold deposits. A number of these deposits were mined during the boom of 1982-2002. One operation that has remained active up to the present is La Herradura Mine...
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The Bawl Mill
• Clinton Declares Three More National Monuments
• McCain Derides Clinton Forest Policy
• Foreigners Lure Mining Partners
• Pacific Island Gov'ts Focus on Undersea Mining
• Options Narrowed for Managing Chugach National Forest
• Company Notes
• Diamond Fever
• Underground Geologic Mapping
• New Quarry Regulations in West Virginia
• Ash Fork Calm After Explosives Theft
• Picks & Pans: Mining in Ghana
• Little Rocky Mountains, Montana
• Collector Reaches New Lows to Find Bottles
• Chinese Camp, California and the Tong War of 1856
• Millie's Tailings
• Visionaries, Scoundrels, and Gamblers
• Executive Defends Special Mill Site Exemption
• Chasing the Ghosts of Forty-Niners
• Washoe County Balks at Black Rock Desert Plan
• State's Only Gold Mine Processes Last Precious Ore
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
