All Articles
How PGMs Affect Assay Beads
September 2001 by Charles L. Butler
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...Additional articles that might interest you...
Legislative and Regulatory Update
February 2012
• Our Federal Landlord
• One down, two to go
• Challenging timing windows in Washington State
• More roadblocks to mining
• Our Federal Landlord
• One down, two to go
• Challenging timing windows in Washington State
• More roadblocks to mining
Ask the Experts
April 2012
Q: Graphite spray to prevent sticking when using cast iron molds
Q: Graphite spray to prevent sticking when using cast iron molds
Epithermal Ore Deposits Associated With Tertiary Volcanism—And the Feasibility of Metal Detecting for Them
December 2000
Epithermal ore deposits are common in regions of late volcanic activity, especially areas associated with Miocene and later Pliocene extrusive volcanics that have not been deeply eroded since the ore was deposited. Many are simple fissure veins, but stock-works and ore-pipes are also common.
Epithermal ore deposits are common in regions of late volcanic activity, especially areas associated with Miocene and later Pliocene extrusive volcanics that have not been deeply eroded since the ore was deposited. Many are simple fissure veins, but stock-works and ore-pipes are also common.
Mining Stock Quotes and Mineral & Metal Prices
October 2018
Gold Diver's Closes Its Doors
December 2004
After almost 50 years of service to the mining industry, Burl Cheely, owner of Gold Diver’s and the manufacturer of the Couple-Jet and Taper-Jet line of dredges, is retiring.
After almost 50 years of service to the mining industry, Burl Cheely, owner of Gold Diver’s and the manufacturer of the Couple-Jet and Taper-Jet line of dredges, is retiring.
Legislative And Regulatory Update
June 2008
• Polar bear listed
• Forest Service trying to close off access
• Polar bear listed
• Forest Service trying to close off access
Melman on Gold & Silver (2008 Year in Review)
December 2008
Our December issue is when we take a look backward at the year nearing completion, and this year is no exception. When we do look backward over the past eleven months, all we can say is, “What a year this has been!” And that isn’t meant in a positive...
Our December issue is when we take a look backward at the year nearing completion, and this year is no exception. When we do look backward over the past eleven months, all we can say is, “What a year this has been!” And that isn’t meant in a positive...
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The Bawl Mill
• A True Endangered Species
• Guest Editorial—Vertical Disintegration
• USGS Reports Increase of Imported Minerals
• The San Juan Mountains, Colorado
• A Silver Opportunity
• Gold in Virginia
• Picks & Pans: DEF Prospectors Rally Was a Huge Success
• News From GATA
• Our Nugget Shooting Adventure
• Fly Fishing the Mine Tailings/Headwaters of the Clark Fork, Montana
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
