The Basics of Small-Scale Heap Leaching with Cyanide
August 2007 by Chris RalphIn 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.
There were many thousands of tenderfoot, greenhorn prospectors that came out west in the 1860s and 70s. Some came to make their fortunes; some came to flee other problems back east; and some just came for the adventure. Probably every one had a tale to tell, but one of these adventurous individuals was a young man named Sam, and this is his true story.
Don’t bother eyeballing that rock for silver! Even if it’s high grade you’ll not see the familiar dime or quarter coin color. Native silver is almost as rare as brass ore. Well, if it’s so hard to find, is silver worth looking for? You bet! Just check the latest prices—and they may go higher.
• Occupancy rules discussed
• Comment period open for small-scale mining and dredging in Oregon
• Is this old mining story too good to be true?
Last month, the earliest mining areas of the Bradshaw Mountains around Prescott, AZ, were explored in the first part of the article. The Lynx Creek and Walker areas still provide many opportunities for weekend prospectors...
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