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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...
We’re Still Thinking About It
We have learned over the years, of course, that “previous development,” “roadless,” and “local support,” are in the mind of the beholder.
BLM 3809 Final Rule Implications
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 Bawl Mill
• From NASA, with warmest regards
• Anything new to report?
Prospecting Knowledge -- Pass It On!
I had two of the guys go down into the creek and each one picked out a small island of bedrock. I had them detect their piece of bedrock and then gave a critique to all on how they did.
Mineralized Faults and Contacts in the Search for Gold
Fault zones and rock contacts are important because the vast majority of gold and silver deposits, as well as those of many other metals, are formed by hot, mineralized water solutions.Picks & Pans: Detecting Micro-Nuggets
Any detector specifically designed to respond to small gold will do. The best ones are the lightest ones with the smallest coils.
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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
