Dating of metals, precious metals and coal???

<< < (2/3) > >>

mdg (August 22, 2009, 16:47:25 PM):
Quote from: Mintaka
Jane, as far as I know gold was not formed on earth per se

Gold is formed here on Earth by geological processes.Ore minerals are formed as the result of molten rock, magma, being intruded into solid rock. As the magma cools and solidifies, water and other volatile substances separate out from the magma under high pressure. The high pressureof hot water and steam force open fissures in the surrounding solid rock, through which these hydrothermal solutions travel. When the hydrothermal solutions cool, deposition of material occurs, especially quartz in the form of quartz veins.
It depends on the types of elements in the solution and how they react with each other and the type of rock surrounding it as to what type of ore is deposited.
Because gold has a relatively low melting temperature, it is sometimes carried by these hydrothermal solutions through the fissures in the rock and solidifies inside the quartz veins.

Hope this helps you, Jane. There are 2 excellent South African books I can recommend:

Geological Journeys - Nick Norman and Gavin Whitfield
The Story of Earth and Life: A Southern African perspective on a 4.6 billion year journey.- Terence McCarthy and Bruce Rubidge

mdg :D
Rigil Kent (August 22, 2009, 17:51:08 PM):
Gold is formed here on Earth by geological processes.

The process you relate describes the deposition of existing gold from a molten to a solid state, not so? To actually form gold by fusion of lighter atoms, you will require quite a bit more energy than is readily available in molten rock.

Mintaka
mdg (August 24, 2009, 12:51:15 PM):
Quote from: Mintaka
The process you relate describes the deposition of existing gold from a molten to a solid state, not so?

Yes, you're right ;) 8)

On the subject of synthetic diamonds....
You can have a synthetic diamond made with the ashes of a loved one or a favourite pet,
see here.
Rigil Kent (August 24, 2009, 13:40:17 PM):
Quote
You can have a synthetic diamond made with the ashes of a loved one

So you can have your dead spouse made into a diamond, have her set into a ring, and present it to your new girlfriend!

Sounds a bit like a Roald Dahl short story! ;D

Mintaka

Mandarb (August 24, 2009, 14:17:17 PM):
Yeah, I think that would be the second thing on my list of what should happen to my body when I die. Just because it's cool.

First is donating to science though. Become a plastinated scuplture, or a forensic science experiment, or even just a cadaver for students to perform autopsies on.

It's not like I'd care.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Skeptic Forum Board Index

Non-mobile version of page