[meteorite-list] Dayton, Ohio Meteorite (?)

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Tue Jul 18 12:21:52 2006
Message-ID: <DIIE.0000000600000341_at_paulinet.de>

Mike G. wrote:

"Dayton is the *weirdest* one of its group," McCoy said.
"Again, that makes it special and the reason scientists
want to study it."

Here are some of those weird things:

1. It's a member of the silicate-bearing IIICD group: Carlton, Dayton, Maltah?he
2. Ni content: Maltah?he (10.7 wt% Ni), Carlton (13.0%), Dayton (17.0% !)
3. Dayton contains SiO2 (!)
4. Graphite is absent in Dayton silicate inclusions
5. Unusual phosphates brianite and panethite, along with
   whitlockite, comprising up to 55 vol% of Dayton's inclusions
6. Silicate inclusions in the Ni-rich IAB irons do not resemble
   the phosphate-rich, evolved-silicate assemblages in Dayton.

Reference:

McCOY T.J. et al. (1992) Genesis of IIICD iron meteorites: Evidence
from silicate inclusions (Meteoritics 27-3, 1992, A258).


Best wishes,

Bernd

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Received on Tue 18 Jul 2006 12:07:30 PM PDT