All Articles
The Basics of Small-Scale Heap Leaching with Cyanide
August 2007 by Chris Ralph
In last month’s article I talked a bit about opportunities for heap leaching small hardrock deposits. This month I’m going to talk about the basics of putting together a heap leach project, including building the pad and leaching the ore.
Melman on Gold & Silver
It’s amazing how a few pictures could place an entire Presidential Administration on the defensive, yet that is exactly what has happened during the past month with the publication of the photos out of Iraq, which presumably show American soldiers engaging in acts of torture, humiliation and ridicule inflicted on their Iraqi prisoners.
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.
BLM Raises Location and Claim Fees
The Bureau of Land Management announced an increase in location filing fees and annual maintenance fees for unpatented mining claims, mill sites and tunnel sites.
Prospecting on Pickering Bar
On Saturday, January 27, 2007, six of us began a trip to Pickering Bar on the North Fork of the American River. It was 7:30 am and we had our engines running to begin the first leg of our two and a half hour trip to get there.
Legislative and Regulatory Update
• 3809 Regulations—Letter Drive
• Environmental groups infiltrate National Park Service
• Interior Secretary Gale Norton chasties environmentalists over Klamath lawsuit
• EPA requests comments on Maximum Contaminant Level rule
Sluicing on Bedrock
My head nearly scraped the caribou horns that hung above the doorway of the old tarpaper cabin I would call home for a few days. The cabin was originally built in the early 1930s and had been dragged about 200 yards across the valley to...
Once Lonely, Mojave Desert Phone Now World's Companion
Now, from all corners of the world, at all hours of the day and night, people call, trying to reach out and touch someone. Anyone, really, who might happen to be passing by when the Mojave Phone Booth starts ringing.
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The Bawl Mill
• Ask the Experts
• Will California Dredging Survive?
• Prospecting For Gold—The Osborne/Herman Hardrock Mine
• Journeys in the Kingman Quadrangle
• From Spanish Mine to Modern-Day Exploration: The Historic Gold-Silver Camp of Palmarejo
• Spanish Police Seize Ship in Treasure Fight
• Looking Back
• Gold Mine Proposed in Jefferson County
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
