Gold in Rotten Rock
February 2004 by Edgar B. Heylmun, PhDRotten rock (saprolite) can be found in all warm, humid regions, but is best developed in humid, subtropical climates, like that found in the American South. Outwardly, it looks like bedrock, but upon closer inspection, it can be seen that roots penetrate it and that it can be worked with a shovel or hydraulic monitor.
The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.
Within these districts, some of the roads and trails have been reopened for access, critical habitat designations have been scaled back, and a few Mining Districts were completely removed from proposed withdrawals.
The gold and copper deposits at Oyu Tolgoi, or “Turquoise Hill,” are among the largest ever found and could give impoverished Mongolia its biggest boost since it abandoned communism 15 years ago—if the Mongolians can figure out how to profit from it.
• Not so happy birthday
• Even more support for the PLP
• Assembly Bill 1032
• Cache County v. USFS
• CMA appeals cyanide ban
The Great Plains region, contrary to popular opinion, is not entirely flat. There are areas of low hills and badlands, and it is in such areas where gold has been found. The areas of interest range from 700 to 3,000 feet in elevation, with annual precipitation ranging from 15 to 40 inches, in the form of summer thunderstorms and winter snow.
The Bawl Mill • Our Readers Say • Buying or Investing in Mineral Properties • The Joy of Prospecting • Company Notes • Picks & Pans: Rattlesnakes in a Gold Camp • Old-Time Mining Geology Books • Ask the Experts: Recommended Reading—Part I • The Tangential Impulse Water Wheel in California Gold Mining History—Part I • Consider Adding Gold to Your Portfolio • US Files Charges Against Gold Refiner • Gold in Australia • Restoring the Rule of Law to US Mining • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices