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:
“Arrive in the afternoon, the late light slanting
In diluted gold bars across the boulevard brag
Of proud, seamed faces with mercy and murder hinting
here, there, interrupting, all deep and debonair,
The pink paint on the innocence of fear;
Walk in a gingerly manner up the hall.”
—Gwendolyn Brooks (b. 1917)
“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)
“Common experience is the gold reserve which confers an exchange value on the currency which words are; without this reserve of shared experiences, all our pronouncements are cheques drawn on insufficient funds.”
—René Daumal (1908–1944)