Another way to recognize a Venus surface rock would be from
its "weathering" in the Venus atmosphere. Because Venus'
surface is so hot, and its atmosphere is so rich in carbon dioxide
and sulfur oxides, the surface rocks should have lots of sulfates
and maybe carbonates in them. Water-free sulfates like anhydrite.
Allan
Allan Treiman
Lunar and Planetary Institute
3600 Bay Area Boulevard
Houston TX 77058 USA
281-486-2117
[EMAIL PROTECTED]
On Feb 12, 2007, at 5:55 PM, [EMAIL PROTECTED] wrote:
Hi Randall and Others:
I did some checking. To quote Tim Swindle: Yes, there may be
meteorites
from Venus, but we have not found them yet!
It is much more difficult to get something out of the gravity well of
Venus, through the Venus atmosphere, and out of the gravity well of
the
Sun. It is much easier to get things off Mars and let Poynting
Robertson
effect, etc. bring it in toward the Earth.
How would we recognize a Venus meteorite?
Argon dating.
Potassium decays to argon. At the temperture of the Venus surface, the
argon would almost immediately escape. So, would not "create" argon 40
that could be retained by a rock until it was out in space.
Therefore, its
argon "age" would be about the same as its cosmic ray exposure age.
Larry
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