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.
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The Oquirrh Mountains, Utah
...we will visit three dormant mining districts that lie in the Oquirrh Range in Utah. Some major activity that transformed the lives of thousands of people occurred here from the mid 1860s to the late 1990s.
Dredging Do's and Don'ts
I’d start the day by crawling out of my dome tent, cooking up some Spam and eggs, and heating water for instant coffee on the Coleman stove.
Gold Basin & Mass Wasting
Some of these events can cause half of an entire mountain to plummet down into a gorge or canyon, damming up a stream system and causing a flood when the earthen dam finally breaks from the water backing up behind it.
Mining Stock Quotes & Mineral and Metal Prices
The Keystone Gold-Copper District, Medicine Bow Mountains, Southeastern Wyoming
The Keystone district includes a group of mineralized shear zones and veins that are associated with the Keystone Quartz Diorite in the Medicine Bow Mountains of southwestern Wyoming. Gold production from this district is unknown, although some estimates suggest that 7,500 to more than 12,000 ounces were produced.
Cedar Rim Opal—Discovery of a Giant Opal Field
In 2003, I initiated field reconnaissance of an opal deposit at Cedar Rim in central Wyoming and was amazed at the size of this undocumented deposit located right in the middle of an oil and gas field...
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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
