[meteorite-list] SAU 290 & L3 blue inclusion

[Zelimir Gabelica]

Hi Jeff,

Thanks Jeff for your very interesting and 
expertized statements on SAU 290. Since I read 
them, I am also starting to consider my 7.93 g 
end section just a little more significant than a 
simple or rare collection curiosity.

Thanks also for providing Gary's close-up of the blue inclusion in his L3.
Even if magnified, it is difficult to guess (from 
the pic) whether it has a metallic luster or it 
is rather a "blue stony" (glassy ?) inclusion.
I suggest Gary examines it at different 
reflection angles under magnification to possibly 
answer that question, namely to discriminate 
between a hibonite-bearing inclusion (or alike) 
and some Cu-Fe sulfide (or any other blue metallic phase).
(Btw, thank you and Peter for your kind comments).

Side note:

I'd also like to answer Jeff Grossman's comments 
regarding the "blue chondrule" we had found in TNZ 082.

Jeff wrote (post sent Feb 7):

<If this is a hibonite-bearing CAI, is it 
important?  There is current research on hibonite 
in CMs, e.g. http://linkinghub.elsevier.com/retrieve/pii/S0016703709003251.
I would contact somebody like Andy Davis at U. 
Chicago, a coauthor on this paper, and get his 
opinion if you're thinking of donating this to science>.

That fragment of TNZ 082 was broken in Munich by 
the team of Philippe Schmitt-Kopplin with whom we 
collaborate to investigate the presence of 
organic extraterrestrial molecules (PAH's & O-, 
N- or S-substitutes) in a series of CM2's, among which TNZ 082 and others.
(Btw, our first paper on Murchison is almost out 
of press. We were notified the the "embargo" on 
that publication will end beginning next week; I'll then send you the link).

Jeff, I have notified my German colleagues of 
your wise suggestion to contact the U. Chicago team.
They answered me that they are right now being 
analyzing that inclusion by microprobe just to 
determine the elemental composition.
Microprobe being a non-destructive technique (the 
sample won't be gold-coated), they agreed that, 
if of interest, the chondrule could then be sent 
as such for further investigation to some other lab.
In such a case, we will get in contact with Andy Davis' team.

Many thanks for the suggestion and for all your comments.

Kind regards to all (from the very snowy and cold 
Alsace, France; apparently, seems we must go 
above the Polar Circle to get mild weather...?)

Zelimir


At 14:30 11/02/2010, Jeff Kuyken wrote:
>Just trying to catch up on some meteorite stuff!
>
>I always thought this one was a bit of an "ugly 
>duckling" but after browsing through a few 
>abstracts I now find myself looking at this one in a different light.
>
>http://www.meteorites.com.au/favourite/june2009.html
>
>Cheers,
>
>Jeff
>
>
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Prof. Zelimir Gabelica
Université de Haute Alsace
ENSCMu, Lab. GSEC,
3, Rue A. Werner,
F-68093 Mulhouse Cedex, France
Tel: +33 (0)3 89 33 68 94
Fax: +33 (0)3 89 33 68 15