Gold
In-situ leaching has not been used on a commercial scale for gold mining. A three-year pilot program was undertaken in the 1970s to in-situ leach gold ore at the Ajax mine in the Cripple Creek district in the US, using a chloride and iodide solution. After obtaining poor results, perhaps because of the complex telluride ore, the test was halted.
Read more about this topic: In-situ Leach
Famous quotes containing the word gold:
“But not gold in commercial quantities,
Just enough gold to make the engagement rings
And marriage rings of those who owned the farm.
What gold more innocent could one have asked for?”
—Robert Frost (1874–1963)
“Having behind us the producing masses of this nation and the world, supported by the commercial interests, the labor interests, and the toilers everywhere, we will answer their demand for a gold standard by saying to them: You shall not press down upon the brow of labor this crown of thorns, you shall not crucify mankind upon a cross of gold.”
—Administration in the State of Neva, U.S. public relief program (1935-1943)
“The award of a pure gold medal for poetry would flatter the recipient unduly: no poem ever attains such carat purity.”
—Robert Graves (1895–1985)