History & Geology
The Pearce Mineralized Area, Dragoon Mountains, Arizona—Part II
August 2013 by W. Dan Hausel
There are many prospects within the known mineralized area and along the margins of the mineralized area that should be examined for gold and silver.Mineralized Faults and Contacts in the Search for Gold
Fault zones and rock contacts are important because the vast majority of gold and silver deposits, as well as those of many other metals, are formed by hot, mineralized water solutions.Gemstones to Die For
Some gems can potentially poison you, make you sterile and even make you forget who you are.
The Mysterious Telluride Minerals
…let’s dive in and take a closer look at these rich gold and silver-bearing minerals to find out what they are, where they form, and how to identify them.
Calcite and Limestone
The other distinguishing feature of calcite has to do with its chemistry. Geologists sometimes take a small bottle of dilute hydrochloric acid out into the field with them because calcite reacts with acids to make a bubbly foam.
Picks & Pans: Gold Recovery in Placer Mining Operations
Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.
Ask The Experts
Sulfides and oxides—what's the difference between the two?
All About Chalcopyrite
…there are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then through the effects of weathering are changed into other minerals like malachite, cuprite and chrysocolla.
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• Common Mistakes of the New Detectorist
• Mining for Gemstones and Mineral Specimens
• Fighting and Winning Without a Lawyer
• The Essentials of Dry Washing
• Fortymile, Alaska Prospecting Adventure
• Court Says Emergency Rule in California Unjustified
• Sampling Placer Stockpiles
• Lower Prices Bring Layoffs
• Prospecting Research
• Buyer Beware! Counterfeit Metal Detectors
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Underground in the Original 16-1 Mine
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