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Meteorites from Earth and Venus
- To: "'Meteorite List'" <meteorite-list@meteoritecentral.com>
- Subject: Meteorites from Earth and Venus
- From: Steven Excell <excell@concentric.net>
- Date: Tue, 5 May 1998 17:12:22 -0700
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- Resent-Date: Tue, 5 May 1998 20:14:33 -0400 (EDT)
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Hello List,
Ron opens up an interesting avenue of inquiry. Right now, there is not a lot of evidence that chondrules/chondrites formed anyplace else in the solar system other than within the main asteroid belt. So, finding a Mercurian or Venusian chondrite would be truly exciting. Such a find would rule out some chondrule-formation models that rely upon solar flares or Jovian resonance's as the means of heating only the region (2-4 AU) of the asteroid belt to precisely the right temperature for short periods of time to form chondrules.
Steve
Ron said:
Some people have suggested that E chondrites (enstatites) chondrites may have originated from either Mercury or Venus, mainly on evidence that the E meteorites seemed to have formed in higher temperatures than your normal meteorite, and the inner solar system is a good candidate. However, the evidence to link these meteorites specifically to either Mercury or Venus is still weak.
The Russians have landed spacecraft on Venus, and some soil analysis was done. It would seem the results from these experiments could be used to help determine what a meteorite from Venus would look like.
Ron Baalke