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January 2001 by Staff
Concerning assay comments...Additional articles that might interest you...
Mining Stock Quotes and Mineral & Metal Prices
November 2014
Alluvial Fans
April 2002
Alluvial fans are essentially dry land “deltas” which can be found in all climates. However, they are best developed in arid and semi-arid regions, where they may be many square miles in area. They are built up by outpourings of silt, sand, and gravel caused by seasonal run-off, as well as by boulders and cobbles carried by flash floods.
Alluvial fans are essentially dry land “deltas” which can be found in all climates. However, they are best developed in arid and semi-arid regions, where they may be many square miles in area. They are built up by outpourings of silt, sand, and gravel caused by seasonal run-off, as well as by boulders and cobbles carried by flash floods.
San Francisco Mint and US Gold Reserves
June 2007
In 1717, Sir Isaac Newton, Master of the British Mint, established a fixed price for gold that was equivalent to around US$20.00 per ounce. This price was for bullion gold, refined to a purity of twenty-two karats (.917 fine).
In 1717, Sir Isaac Newton, Master of the British Mint, established a fixed price for gold that was equivalent to around US$20.00 per ounce. This price was for bullion gold, refined to a purity of twenty-two karats (.917 fine).
The Fire Assay of Fly Eyes
July 2002
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.
Eolian Gold Deposits
February 2014
Prospectors who specialize in electronic detecting for nuggets in desert areas are especially interested in this type of deposit, as it yields nuggets that are close to the surface of the ground...
Prospectors who specialize in electronic detecting for nuggets in desert areas are especially interested in this type of deposit, as it yields nuggets that are close to the surface of the ground...
Silver Bonanza in the Sierra Madre: The Glorious Past of Batopilas—Pt I
October 2007
Discovering new mines is often associated with reexamining old ones, as several prominent new discoveries will attest in northern Mexico. MAG Silver Corp. is exploring three historic districts.
Discovering new mines is often associated with reexamining old ones, as several prominent new discoveries will attest in northern Mexico. MAG Silver Corp. is exploring three historic districts.
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The Bawl Mill
• Over the Divide
• Special Editorial: Gold Anti-Trust Action Committee Believes They Have the Evidence
• World Gold Council News
• Metal Detecting Within the Cordillera for Gold Placers Associated With Tertiary Epithermal Ore Deposits
• Picks & Pans: An Exciting Hobby
• Prospecting for Silver With a Geiger Counter
• The Furnace Atmosphere During the Fire Assay
• The Hanging Tree
• Gold in Chihuahua, Mexico
• ICMJ 10th Annual Photo Contest Results
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
