All Articles
Avino’s Durango Project
May 2008 by Leonard Melman
Mining has been a mainstay of the Durango economy for generations. It was mining, beginning with the discovery of what later became the Avino Mine in the sixteenth century by Juan de Tolosa of the Spanish Army, which formed the basis...
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The Grubstake Gulch Placers, Alaska
January 2006
I’m not sure if it was the cold, clear, pure drinking waters of Grubstake Gulch and Willow Creek that have drawn me over the years, or the flat nuggets of gold I have dug out now and then. Since about 1973, I’ve extensively prospected up...
I’m not sure if it was the cold, clear, pure drinking waters of Grubstake Gulch and Willow Creek that have drawn me over the years, or the flat nuggets of gold I have dug out now and then. Since about 1973, I’ve extensively prospected up...
The Klamath Mountains
September 1999
Over 7 million ounces of gold have been produced in the Klamath Mountains of northwestern California, 64% of which has been from placers.
Over 7 million ounces of gold have been produced in the Klamath Mountains of northwestern California, 64% of which has been from placers.
The Amazing Mineral Tourmaline
December 2013
It is a gemstone, and yet it is also closely associated with many types of metal ores. It's valuable itself but often points toward other valuable minerals—that is certainly something prospectors want to know more about!
It is a gemstone, and yet it is also closely associated with many types of metal ores. It's valuable itself but often points toward other valuable minerals—that is certainly something prospectors want to know more about!
Looking Back
May 1999
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Gold Depositiion and Gradients of Placer Streams—Part II
July 2012
The steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.
The steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.
The Bawl Mill
March 2017
• Take a seat
• Hold everything!
• Flying under the radar
• Last minute spending spree
• Take a seat
• Hold everything!
• Flying under the radar
• Last minute spending spree
Gold in Jasperoid
February 2000
Jasperoid is a jasper-like siliceous rock, in which chalcedony or cryptocrystalline quartz has replaced limestone, dolomite, or shale. It forms the gangue of many important ore bodies. It is stained by iron and manganese oxides into shades of...
Jasperoid is a jasper-like siliceous rock, in which chalcedony or cryptocrystalline quartz has replaced limestone, dolomite, or shale. It forms the gangue of many important ore bodies. It is stained by iron and manganese oxides into shades of...
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The Bawl Mill
• Ask the Experts—Why doesn't the 1872 Mining Law apply to all 50 states?
• Ask The Experts—Where do I find information about getting paid for raw gold?
• Understanding Geologic Deposit Models
• The Lost Silver Triangle of the Sierra Madre—Part II
• Prospecting for Diamonds
• Success With A Detector
• Horsetail Gold
• The Makorakoza of Zimbabwe—Centuries of Prospecting in Gold-Hosting Dolerites
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
