Gold Deposits in Skarn
July 2003 by Edgar B. Heylmun, PhDSkarn consists of coarse-grained calcium, magnesium, iron, and aluminum silicates formed by hydrothermal solutions, which replace limestone or dolomite near the contact with an igneous intrusion. The contact metamorphism is usually caused by an intrusion such as quartz monzonite, granodiorite, or similar rock type, which may or may not be mineralized.
• Norton treasures environment but environmentalists worry
• From the National Forest Service
• Suit Filed Against Roadless Initiative
• New EPA rules restrict ombudsman
• Forest Service Sierra Nevada plan is even opposed by Feinstein
The old timers typically washed these areas down to bedrock, and some areas appear terraced. I would imagine this is because these hydraulic mines were generally where the miners found old Tertiary river channels on the sides of mountains that were gold-bearing.
The company acquired the Guanajuato Mine Complex in 2005, and since that time they have carried out extensive drilling programs, both from surface and underground, with particular emphasis being placed on the Cata Clavo Zone.
On Tuesday morning, August 26, 2010, my clients Michael and Linda Backlund were forced to plead guilty to a charge of violating 36 CFR §261.10(b), which criminalizes maintaining a residence on Forest Service land without authorization “when such authorization is required.” This is a new regulation pursuant to which virtually anything, even a tent, is an unlawful “residence” unless authorized in advance.
Why couldn’t we take some cold river water, pass it through some cooling coils and cool the air in the mine? This thought came to me one Sunday afternoon while fishing, knee deep, in the cold Coeur d’Alene River just west of Kellogg, Idaho.
After several hours we finally found some old home sites that had completely collapsed, and the only items remaining were old boards and metal piping. Finding the old house sites was a good thing, but the old mines and vein systems were still...
Centrifugal bowls versus jigs
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