History & Geology
Gold Deposition and Gradients of Placer Streams—Part I
June 2012 by Jim Halloran
![](http://www.icmj.com/userfiles/images/201206/TOC-depositition-placer.jpg)
Critical Metals: Copper
![](http://www.icmj.com/userfiles/images/201205/TOC-copper.jpg)
Sixteen to One Gold Mine: Unique Challenges and Potential Rewards - Pt I
Many of the Sixteen to One’s challenges arise from its unusual geology and the pocket characteristics of the ore deposits.
Third Largest Nugget in Existence Returns to Dallas
While the bullion value of the nugget is already substantial, the size and rarity of the Ausrox Nugget combine to make its worth invaluable in the collector market.
Prospecting for Silver Deposits
![](http://www.icmj.com/userfiles/images/201508/35-silver-deposits.jpg)
Gold Deposition and Gradients of Placer Streams—Part I
![](http://www.icmj.com/userfiles/images/201206/TOC-depositition-placer.jpg)
Gold in Tertiary Gravels
![](http://www.icmj.com/userfiles/images/201511/tertiary-gold.jpg)
Subscription Required:
The Bawl Mill
• Our Readers Say
• Iowa Hill District
• Pursuing Rare Earths in Wyoming
• The Mole
• Prospecting for Copper Ores—Part I
• Repair / Replace Tax Rule Changes
• The Wisdom of Mark Twain—And Tales of Cheating the Unwary Prospector
• Colorado Mining Association Appeals Roadless Ruling
• Ganes Creek Hits 10 Years—Part II
• Fifteen and Counting
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
Free:
Legislative and Regulatory Update
• Bigger and Better—Gold Prospecting & Mining Summit Recap