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Looking Back
July 2007 by Staff
Excerpts from California Mining Journal, our original title, published 50 years ago this month.How PGMs Affect Assay Beads
Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...
Miners Attend Meeting in Myrtle Point, Oregon
It was "standing room only" as a crowd of approximately 50 interested miners attended a meeting hosted by the Powers Ranger District and Forest Service personnel from the Siskiyou National Forest.
Ask The Experts
Hydraulic remnants or just lose material?
What To Do When Gold Recovery and Assay Values Differ
Before going into an analysis of the ore composition, two other major factors will affect the result. These are the accuracy of the assay and the effectiveness of the mill for the gold recovery.
The Mountain Gate Mine
The Foresthill Divide in Placer County, California, has underneath its present surface a multitude of buried river channels, most of which paid enormously well in the Gold Rush years of 1850 to 1890.
Legislative and Regulatory Update
• Roadless Rule revisited
• Kensington finally gets stamp of approval
• Interior places restrictions on mining claims near Grand Canyon
Subscription Required:
The Bawl Mill
• Ask the Experts
• More Tips for Evaluating Ores
• The Mountain Gate Mine
• The Basics of Small-Scale Heap Leaching with Cyanide Part I—History, Suitablility and Permitting
• Oregon Suction Dredge Permit Update
• In Pursuit of Gold and Silver in the Sierra Madres—Buying the Pilot Mill
• Life in the Alaska Gold Rush
• More Small-Scale Miners Attracted by Gold Prices
• Gold in New Zealand
• Ready “Ore” Not, Uranium Boom is On Again
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
