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Uranium Deposits
July 2001 by Edgar B. Heylmun, PhD
The first reported occurrence of uranium in the United States was at Central City, Colorado, in 1871. However, prior to 1922, the ore was mined for its radium content, not uranium.
The Petersville—Yentna Goldfields
Upon first entering this district in the early 70s, the trip into the Petersville area by vehicle was risky at best, especially during rainy periods in summer. The road has been improved somewhat since then, but not much.
Weathering, Erosion and Placers
The big interest to prospectors thinking about the effect of erosion is not what might happen long into the future, but what they might find in the rivers later this summer when the water levels go down.
Gallium and Germanium in Utah
The high-tech industries are making use of a number of so-called “minor” metals, many of which are obtained as byproducts of copper, lead, or zinc mining. Some of the minor metals have properties that are ideal for certain applications and, in some cases, advancements in technology are being held back because of a shortage of the metals.
Ask the Experts
• Where would I find a map for the Western states on high silica sand deposits?
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.
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Millie's Tailings
"Swanee" McBride knew how to make a safe trail along the narrow edge of a high, steep slope bordering his mining claims. It twisted into sharp turns as it wound around massive pines and huge boulders.
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