All Articles
VMS Deposits in Central Arizona
October 2004 by John Rothermel
Volcanogenic Massive Sulfide (VMS) deposits in the Central Arizona Precambrian volcanic belt occur within a felsic package of volcanic rocks capped by an exhalite unit comprised of cherts, iron formations and siliceous members.
Picks & Pans: The Ten-Pennyweight Nugget
It was June 6th, 1999 at 7:00 am when I started hiking to the river with my final load of dredge equipment. Hearing the flow of water in the South Fork of the Yuba River and the call of birds up and down the canyon, I added some whistles of my own just to annoy the nearby birds.
The Bawl Mill
• Dear Palestinian Bomber…
• Not what we had in mind...
• The high price of poverty
• Wipe that smile off your face
Melman on Gold & Silver
Mining Claim Fees Are Going Up
The Northwest Mining Association reports that the claim maintenance fee for 2004-2005 will be raised.
Heavy Sands Mining
Lately my mind has been involved with group 4 of the transition elements, namely titanium, zirconium, and hafnium. They all have similar chemical properties. Of greatest interest to economic geologists and miners is that these valuable elements often occur together in sands.
Over the Divide
Lynn Gunn
June 18, 1955 — August 3, 1999
Understanding Skim Bar Placers
Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.
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The Bawl Mill
• Update: Forest Service Interim Rule
• The Guyana Highlands
• Prospecting with a VLF-Type Gold Detector
• Freegold Ventures' Golden Summit Project
• Picks & Pans: Working the Crevices
• Molybdenum
• 2004 California State Gold Panning Championships
• Company Notes
• Why Environmental Groups Prefer Kerry
• The French Mines of El Boleo
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
