[meteorite-list] www.venusmeteorite.com - what are your opinions on this claim

[Allan Treiman]

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
treiman at lpi.usra.edu



On Feb 12, 2007, at 5:55 PM, lebofsky at lpl.arizona.edu 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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