All Articles
PGMs in California
September 2002 by Edgar B. Heylmun, PhD
The occurrence of platinum-group metals (PGMs) is rather widespread in California in placer deposits, but they are not of commercial interest as things now stand.
Legislative and Regulatory Update
• California suction dredgers had better prepare for battle
Michigan DEQ Gives Tentative OK to Nickel, Copper Mine
Environmentalists were happy when the state adopted rules governing an underground mining method that hadn’t been tried in Michigan. Now they’re angry.
Gold in Guyana—Part I: Porknocking on the Puruni River Road
In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.
Indicators and Hillsides
The placer gold shows up in ground sluice areas, hydraulic pits, secondary channels and hillside diggings. It is coming down the hillsides from an ancient channel left high and dry millions of years ago.
Strategies for Detecting Heavily Pounded Areas—Part III
This helps me to see if there is a pattern taking place with where I am finding nuggets, and when I study the map layer with all of my pins marking nuggets, I can drop in new pins where I want to search the next day.
Mining Expedition at Eagle Rock—Part II
We spent more time that first day moving rocks than we did sending material over the sluices. Even so, our cleanup was quite respectable for having only moved down to a depth of a couple feet.
Legislative and Regulatory Update
• Court says ESA does not apply in some cases
• Comments needed for proposed critical habitat in several Western states
• EPA still trying to rewrite the Clean Water Act
• Enough already!
• Now is the time to act
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The Bawl Mill
• What's In A Name?
• Our Readers Say
• BLM Swindles War Hero Out of Gold Mine
• Paleoplacers in the Black Hills
• The River Runs Through It
• DEF Has Another Successful Year
• Fellow Miner, Left for Dead, Needs Our Help
• Picks & Pans: The Professional Nuggetshooter
• Company Notes
• Gold in the First Pan
• Looking Back
• Cedros Island, Mexico
• The Eagle and High Peak Mines of Julian, California
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
