[meteorite-list] Ibitira--Not An HED Achrondrite

[David Weir]

Hello Mike,

Thanks for the heads up on this forthcoming article, and your interest
in my opinion, or more likely, in the current information my website
offers about Ibitira and how it compares to these new findings.

I'm excited that this special meteorite has been examined more
thoroughly, especially utilizing an O-isotope analysis, which, taken
together with compositional data, reflectance spectra, CRE age, and
other techniques, seems to provide reasonable evidence by the esteemed
Dr. Mittlefehldt, with a little help from Ockham's razor, to accept that
Ibitira samples a unique parent body. Pretty darn cool I'd say.

David
------------------------------------
Michael Fowler wrote:
> 
> In doing research prior to purchasing an 18.5 gram slice of Ibitira, I
> came across the following:
> 
> Ibitira: A basaltic achondrite  from a distinct parent asteroid   by
> David W. Mittlefehldt  submitted: 13 October 2004   Meteoritics &
> Planetary Science
> 
> link to pdf download:  http://ares.jsc.nasa.gov/mittlefehldt/Ibitira.pdf
> 
> Apparently Ibitira is a unique representative of a fifth parent body
> with a basaltic (crust?).  The others are represented by NWA 011, the
> Angrites, Mesosiderites, and the HED's from Vesta.
> 
> Any comments, especially David Weir??
> 
> My goal, as a collector is to obtain a type specimen from as many
> different parent bodies as possible.  Since there are more than 135
> such bodies, and I have representatives of 25, I have a ways to go!
> 
> Mike Fowler
> Chicago