Discovery of the Mountain Pass REO Deposit
May 2001 by Edgar B. Heylmun, PhDHow does one go about discovering a rare earth oxide (REO) deposit when he is not familiar with the rare and unusual rocks and minerals that are found in such deposits? That was the case at Mountain Pass, California, yet the deposit was eventually discovered and mined.
Robert A. Sanregret
1930 - 1999
After several hours we finally found some old home sites that had completely collapsed, and the only items remaining were old boards and metal piping. Finding the old house sites was a good thing, but the old mines and vein systems were still...
Hardrock mining never would have happened in the United States if a recent interpretation of the nation's mining law had been in effect in the 1890s, a mining executive says.
In other words, just like those that move next to an airport and then complain about the noise, Mr. Riskedahl deliberately went out of his way to “witness and document the effects of suction dredge mining,” and when he found some, he was annoyed by it!
Ohio is an industrialized, midwestern state with a population of 11.5 million and an area of 40,953 square miles. Annual precipitation is about 40 inches, enough to give rise to hardwood forests...
Why, if America’s economic performance is advancing steadily…are two especially sensitive and widely-used commodities performing so poorly?
David N. Skillings, Jr
The Bawl Mill • Original Sixteen to One Goes to Court—Challenges MSHA Citations Part II • The Golden Triangle of Sonora, Mexico • Using Legal Subdivision • Placer vs. Lode Gold • Gold Tellurides: Tellurium, an Assay Impurity • Court Hears Arguments Over Rights to Shipwreck • Picks & Pans: How to Succeed in a Small Mine, A Case History: 1990-2000 • Charcoal Crucible Recipe • Romance of the Old Silver King • Record-Breaking Alaskan Nugget for Sale • Company Notes • Nevada Gold Production Up Despite Lower Prices • Gold in Guatemala • Bush Taps Utah Resident for Labor Post • Looking Back • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices • Honda Pares Down Use of Precious Metals in Autos