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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Gold Recovery with Centrifugal Bowls
July 2014
Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.
Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.
The Bawl Mill
March 2004
• Nearly half their income goes to the government...
• Prison life has its priviledges
• Nearly half their income goes to the government...
• Prison life has its priviledges
Know Your District
December 2010
We have to remember that the earliest miners were not geologists, but came from a variety of backgrounds. Their survival depended on finding enough gold so they worked hard and adapted to whatever challenges these new areas presented.
We have to remember that the earliest miners were not geologists, but came from a variety of backgrounds. Their survival depended on finding enough gold so they worked hard and adapted to whatever challenges these new areas presented.
Melman on Gold & Silver
July 2012
On a personal level, I have been part of the business, brokerage and financial columnist worlds for 45 years, since the mid-1960s, and in all those years, I have never seen a collection of negative news items similar to what has been published during the past month. In short, taken together they may very well be describing the end of the economic world systems as we know them.
On a personal level, I have been part of the business, brokerage and financial columnist worlds for 45 years, since the mid-1960s, and in all those years, I have never seen a collection of negative news items similar to what has been published during the past month. In short, taken together they may very well be describing the end of the economic world systems as we know them.
Placer Gold in Idaho
October 2002
Idaho is situated in the Rocky Mountains except for the southern third, which encompasses the Snake River Plain and desert mountains to the south. Elevations range up to 12,662 feet at Mt. Borah, with annual precipitation varying from 8 inches in the south to over 60 inches in the central mountains.
Idaho is situated in the Rocky Mountains except for the southern third, which encompasses the Snake River Plain and desert mountains to the south. Elevations range up to 12,662 feet at Mt. Borah, with annual precipitation varying from 8 inches in the south to over 60 inches in the central mountains.
Ask the Experts
March 2014
NOI or POO for small backhoe
NOI or POO for small backhoe
All About Garnets
February 2013
I get a lot of questions from prospectors about garnets, their value and what they tell us about the geology of some types of mineral deposits. So I thought it would be a good idea to take a closer look at the lowly garnet and learn a bit more about it.
I get a lot of questions from prospectors about garnets, their value and what they tell us about the geology of some types of mineral deposits. So I thought it would be a good idea to take a closer look at the lowly garnet and learn a bit more about it.
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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
