Inside Australia's deepest gold mine — how deep can history go at Gwalia?

Inside Australia's deepest gold mine — how deep can history go at Gwalia? - ABC News (Australian Broadcasting Corporation)

A truck driver working at the bottom of Australia's deepest gold mine gets loaded up with about 55 tonnes of precious cargo — hard rock blasted from the Earth and containing small specks of the yellow metal.

For every tonne trucks cart to the surface there might be only seven grams of gold, the equivalent of about one teaspoon.
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'This is Gwalia in Western Australia's remote northern Goldfields.'

Interestingly, Herbert Hoover, the Republican President who brought the world the Great Depression, was once manager of this deep mine after graduating for Stanford U. in the 1890s. And they are still digging deeper to get the gold. At something around $1,200/ounce, this deep truck mining is still profitable.

To date this mine has yielded $10BN at today's gold prices. Eighty-three miners have died in the process.

The massive Comstock silver mine in California produced so much silver it forced Germany to go off of the silver standard. The Comstock never ran dry of silver. Rather it became so deep that no amount of pumping and fans could handle the heat and flooding. When abandoned, the massive network of deep shafts, tunnels and man-made caverns were allowed to flood. Mines can only go so deep as the deeper they go the hotter it becomes.

joko104 said:

The massive Comstock silver mine in California produced so much silver it forced Germany to go off of the silver standard. The Comstock never ran dry of silver. Rather it became so deep that no amount of pumping and fans could handle the heat and flooding. When abandoned, the massive network of deep shafts, tunnels and man-made caverns were allowed to flood. Mines can only go so deep as the deeper they go the hotter it becomes.

Click to expand...

The Comstock silver lode lies (lay) in Nevada.

Germany switched to the gold standard in 1871 for completely different reasons than stated.

Silver prices dropping (for a variety of reasons that would explode this thread) led to decrease of mining and depth of mining had nothing to do with it.

10 of the world's deepest mines by far surpass any depth the Comstock mine ever reached.

Gwalia is opencast. no problem with cooling or pumping, it's just a massive hole, with monster trucks pulling the rubble up great circular roads.