All Articles
Finding Gold With Copper and Turquoise
August 2009 by Chris Ralph
The signs of copper, which the prospector most commonly sees in the field in outcrops and on the surface, are secondary minerals caused by the action of air and water on the original copper-bearing sulfides that were deposited deep...
Additional articles that might interest you...
Mining Districts in Montana Get Organized
January 2017
Those miners present immediately recognized the benefits of becoming members of MMAC and joined up on the spot. I spent some time answering a few questions, and then the miners took over.
Those miners present immediately recognized the benefits of becoming members of MMAC and joined up on the spot. I spent some time answering a few questions, and then the miners took over.
Discoloring Assay Beads
October 2001
We have developed a discoloring procedure, that makes parting unnecessary in many cases. Our discoloring solution contains sulfur, an element that tarnishes high silver content beads quite rapidly.
We have developed a discoloring procedure, that makes parting unnecessary in many cases. Our discoloring solution contains sulfur, an element that tarnishes high silver content beads quite rapidly.
Enrichment of Mineral Deposits by Weathering—Part I
March 2016
The exact minerals formed in the concentrated supergene deposits depends much on the type of country rock around the deposit and the chemistry of the deposit itself, but if conditions are right, this process will form some rich patches of bonanza ore, in some places valued at thousands of dollars to the ton.
The exact minerals formed in the concentrated supergene deposits depends much on the type of country rock around the deposit and the chemistry of the deposit itself, but if conditions are right, this process will form some rich patches of bonanza ore, in some places valued at thousands of dollars to the ton.Modesto, California Man Finds 18-Ounce Nugget
October 2016
Oscar Espinoza considers himself an amateur gold prospector, but the gold nugget he recently found puts many seasoned prospectors to shame.
Oscar Espinoza considers himself an amateur gold prospector, but the gold nugget he recently found puts many seasoned prospectors to shame.
Platinum—Group Metals
September 1999
by Henry E. Hilliard
Excerpted from USGS "1998 Annual Review"
by Henry E. Hilliard
Excerpted from USGS "1998 Annual Review"
Clarification on Oregon's SB838
August 2014
The 100-yard restriction in SB838 actually applies to all motorized mining for the purpose of extracting gold, silver or any other precious metal that results in the disturbance of vegetation.
The 100-yard restriction in SB838 actually applies to all motorized mining for the purpose of extracting gold, silver or any other precious metal that results in the disturbance of vegetation.
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.
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