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:
“The enquiring fields, courtesies
And tribulations of the air
Be still and give them peace:
The girl in the gold hair
With her young man in clover
In shadow of the day’s glare ...”
—Allen Tate (1899–1979)
“There is too much sour grapes for my taste in the present American attitude. The time to denounce the bankers was when we were all feeding off their gold plate; not now! At present they have not only my sympathy but my preference. They are the last representatives of our native industries.”
—Edith Wharton (1862–1937)
“Perfect alchemists I keep who can transmute substances without end, and thus the corner of my garden is an inexhaustible treasure-chest. Here you can dig, not gold, but the value which gold merely represents; and there is no Signor Blitz about it.”
—Henry David Thoreau (1817–1862)