History & Geology
Gangue Minerals - What Do They Tell Us?
January 2017 by Chris Ralph
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.
It Pays to Know Your Bedrock
On our last trip, we brought ropes and went down the first waterfall forty vertical feet, only to be confronted by a second, sixty-foot-high, overhanging waterfall that emptied into a slot canyon.
Gold in The Silver Crown District, Wyoming
When my field assistant Jay Roberts and I entered the mine, it appeared as if someone just walked out of the mine, turned off the lights and never returned.
The Oquirrh Mountains, Utah
...we will visit three dormant mining districts that lie in the Oquirrh Range in Utah. Some major activity that transformed the lives of thousands of people occurred here from the mid 1860s to the late 1990s.
Arizona's Vulture Gold Mine and Lost Dutchman
When prospectors and treasure hunters talk of gold in Arizona, it is the Lost Dutchman or Vulture mine they usually think of. The Lost Dutchman gold mine is just that—a myth chalked full of holes that has been embellished over time as any good legend should be.
Prospecting for Copper Ores—Part II
Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.
Prospecting for Nickel Deposits
The periodic exploration efforts for nickel during periods of high prices have been sporadic and incomplete. There is a role for the prospector and geologist in searching laterites potentially rich in nickel and mafic igneous bodies that may be rich in nickel.
California: The Land of Big Nuggets—Part II
There are a number of Tertiary river channels in the area, most of which trend south-southwest. They tend to be steep, narrow, and rich with coarse gold.
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The Bawl Mill
• Ask The Experts: Could you expand on your previous blasting article?
• Ask The Experts: Equipment to break up heavy clay
• Ask The Experts: “Energy” coming from black sand?
• Ask The Experts: Assay problem or recovery problem?
• Legislative and Regulatory Update
• Detecting Strategies for Heavily Forested Areas—Part II
• The Winning Hand
• Early Winter Detecting in the Sierras
• Mining Districts in Montana Get Organized
• Feds Deny Lease Renewals for Minnesota Mine
• Obama Administration Moves to Block Mining Near Yellowstone
• The Perfect Response
• MMAC Update
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
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That First Nugget
