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.
After six years of primarily sideways action, gold broke decisively to the upside by breaking above strong resistance between $1,350 and $1,400 by soaring to near $1,450 before correcting moderately.
Detectors were invented long before I was born, but it was in the 1960s when they started to become an item popular enough to power a fledgling industry. The key development was miniature transistor technology replacing the old fashioned tube technology of the 1950s, making lightweight, affordable detectors possible.
She explained that she didn’t like the numbers that the computer model gave her for this section of river, so she “adjusted the numbers by hand” to more accurately reflect what she thought they should be.
Why, if America’s economic performance is advancing steadily…are two especially sensitive and widely-used commodities performing so poorly?
Gold mining adventures can begin in the most unusual fashion. This one started when the high water receding in May of 1999 disclosed that a tragedy had occurred somewhere upstream of Slaughterhouse Gulch on the north fork of the...
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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