All Articles
VMS Deposits in Central Arizona
October 2004 by John Rothermel
Volcanogenic Massive Sulfide (VMS) deposits in the Central Arizona Precambrian volcanic belt occur within a felsic package of volcanic rocks capped by an exhalite unit comprised of cherts, iron formations and siliceous members.
Additional articles that might interest you...
Underground Geologic Mapping
February 2000
Mapping geology underground is not difficult if one knows the procedures. This article presents the procedures that will allow any miner to produce a geologic map of their workings.
Mapping geology underground is not difficult if one knows the procedures. This article presents the procedures that will allow any miner to produce a geologic map of their workings.
Significant Progress for California Suction Gold Dredgers
January 2015
It was a milestone day in the battle to maintain the rights of miners to dredge on federal mining claims in California.
It was a milestone day in the battle to maintain the rights of miners to dredge on federal mining claims in California.
The Baja Gold Rush of 1889
December 2004
Small amounts of placer gold can be found in many parts of Baja California, Mexico. The 700 mile long peninsula is mostly a desert region with many strange and unusual plants. There is also a central mountainous spine that is forested and reaches elevations as high as 10,155 feet.
Small amounts of placer gold can be found in many parts of Baja California, Mexico. The 700 mile long peninsula is mostly a desert region with many strange and unusual plants. There is also a central mountainous spine that is forested and reaches elevations as high as 10,155 feet.
Using Legal Subdivision
May 2001
“Legal Subdivision” is a method used to describe various tracts of land, including most placer mining claims. Anyone wanting to research mining claims in order to find “open ground,” for the purpose of prospecting and/or locating a mining claim, will need to know how to use this tool.
“Legal Subdivision” is a method used to describe various tracts of land, including most placer mining claims. Anyone wanting to research mining claims in order to find “open ground,” for the purpose of prospecting and/or locating a mining claim, will need to know how to use this tool.
Original Sixteen to One Goes to Court—Challenges MSHA Citations
April 2001
Original Sixteen to One Mine, Inc. has experienced unreasonable heavy-handed enforcement by the federal Mine Safety and Health Administration (MSHA) for the past two years (see ICMJ January 2000 issue). The publicly listed company operates a traditional underground gold mine...
Original Sixteen to One Mine, Inc. has experienced unreasonable heavy-handed enforcement by the federal Mine Safety and Health Administration (MSHA) for the past two years (see ICMJ January 2000 issue). The publicly listed company operates a traditional underground gold mine...
Lode or Placer: What Difference Does It Make?
September 2014
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
Our Readers Say
July 2001
“...I appreciate the details on the economics of the operation.”
“...I appreciate the details on the economics of the operation.”
Subscription Required:
The Bawl Mill
• Update: Forest Service Interim Rule
• The Guyana Highlands
• Prospecting with a VLF-Type Gold Detector
• Freegold Ventures' Golden Summit Project
• Picks & Pans: Working the Crevices
• Molybdenum
• 2004 California State Gold Panning Championships
• Company Notes
• Why Environmental Groups Prefer Kerry
• The French Mines of El Boleo
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
