All Articles
Wall-Rock Alteration
April 2004 by Edgar B. Heylmun, PhD
Wall-rock (country rock) alteration is found in all hard-rock mining districts and has been caused by hydrothermal solutions in the past history of the region. The zones of alteration have a bearing on where one might drill for ore bodies. The weekend prospector does not have the tools nor knowledge to block out ore deposits, but he can narrow down his search dramatically by understanding the zones of wall-rock alteration that he sees.Legislative and Regulatory Update
• NEPA improvements coming?
• Speaking of the Forest Service...
• Murkowski proposes tax increase on miners
• Kensington impact statement affirmed
• Rock Creek on hold, for now
• ESA reform update
• Desert Mineral Mining; one down, two to go for permits
• Montana smells a RAT
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
$50 Million Swiped in Diamond Heist
Eight masked gunmen forced their way through the security fence at Brussels’ international airport, drove onto the tarmac and snatched some $50 million worth of diamonds from the hold of a Swiss-bound plane without firing a shot.
Mining Stock Quotes and Mineral & Metal Prices
Feinstein Pushes for Million-Acre Land Grab
Met by jeers and cheers from more than 1,000 people, US Senator Diane Feinstein (D-CA) made another pitch to create three new national monuments in the deserts of southern California recently.
Picks & Pans—In Search of Nome Creek Gold
My father recalled fondly his early years of flying his Super Cub into the Preacher Creek watershed in search of game and gold, landing on wind blown ridges traversed by the giant Porcupine caribou herd that frequented the area.
A Primer on Bitcoin and Other Cryptocurrencies
Some financial commentators have speculated that bitcoin and other virtual currencies have captured a portion of funds that would have been invested in gold. I find it a bit ironic that people who invest in precious metals would even consider another fiat currency.
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The Bawl Mill
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