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.
Four miners were killed in eastern Ukraine in two separate accidents during one week in May in the country's troubled mines, emergency officials said.
In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.
Without this versatile group of technologies, we would be hard-pressed to produce the metals so critical to our modern way of life. The robust mining industry of today would literally not exist.
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
Gold chains, silver coins and bars of solid gold glittered in the tropical sun as the family of famed treasure hunter Mel Fisher showed off another significant find from a sunken Spanish galleon.
• Election impact
• New Washington State small-scale regulations
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