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:
“‘Tis not the balm, the sceptre, and the ball,
The sword, the mace, the crown imperial,
The intertissued robe of gold and pearl,
...
Not all these, laid in bed majestical,
Can sleep so soundly as the wretched slave
Who with a body filled and vacant mind
Gets him to rest, crammed with distressful bread.”
—William Shakespeare (1564–1616)
“Then leaf subsides to leaf.
So Eden sank to grief,
So dawn goes down to day.
Nothing gold can stay.”
—Robert Frost (1874–1963)
“But tell me: how did gold get to be the highest value? Because it is uncommon and useless and gleaming and gentle in its brilliance; it always gives itself. Only as an image of the highest virtue did gold get to be the highest value. The giver’s glance gleams like gold. A golden brilliance concludes peace between the moon and the sun. Uncommon is the highest virtue and useless, it is gleaming and gentle in its brilliance: a gift- giving virtue is the highest virtue.”
—Friedrich Nietzsche (1844–1900)