[meteorite-list] New Australian fall-Non Vesta Eucrite

From: Jason Utas <meteoritekid_at_meteoritecentral.com>
Date: Fri, 18 Sep 2009 18:17:10 -0700
Message-ID: <93aaac890909181817g6283e670g310f00a457ca7428_at_mail.gmail.com>

Well, oxygen isotopes are one thing, but orbital data would seem to be
a strange way to classify a meteorite to me; given the past four and a
half billion years of collisions, things have been far too 'messed up'
in the inner solar system for that to mean much; we have comets
present in stable orbits here in the innrer solar system, and it
doesn't mean that they formed there.
And most would also make a clear definition between chemical and
isotopic data, which he confuses (or the reference was a misquote) in
the article.
After all, Ibitira's a "Eucrite," but NWA 011's an ungrouped
achondrite. It's the chemical difference that seems to make the
difference in nomenclature.
Jason

On Fri, Sep 18, 2009 at 5:47 PM, Michael Fowler <mqfowler at mac.com> wrote:
> Additional information from a Scientific American link that says that the
> meteorite is not from Vesta, because the orbit is wrong, and the oxygen
> isotopes are different.
>
>
> http://www.scientificamerican.com/blog/60-second-science/post.cfm?id=recovered-meteorite-points-to-an-un-2009-09-17
>
>
> Mike Fowler
> Chicago
>
>
>> > And I think it might be interesting to note this article, where Dr.
>> > Philip Bland can be quoted as stating that Eucrites are not, in fact,
>> > from Vesta.
>>
>> > Go figure.
>>
>> >
>> > http://au.news.yahoo.com/a/-/technology/6075299/rare-meteorite-found-in-outback/
>> >
>> > Regards,
>> > Jason
>>
>>
>> Jason,
>>
>> You were a little bit hasty or misleading in your summarizing of Dr
>> Bland.
>>
>> see quote below from the article you cited. (and to think that we are
>> always criticizing reporters for getting it wrong!)
>>
>> Mike Fowler
>> Chicago
>>
>>
>>
>> ""Dr Bland says most basalt meteorites, like the one found in the
>> Nullarbor, originate from a large asteroid called Vesta but the
>> Bunburra Rockhole meteorite is different.
>>
>> "Our little guy can't be from Vesta, the composition is all wrong," he
>> said.""
>
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Received on Fri 18 Sep 2009 09:17:10 PM PDT