[meteorite-list] Weird inclusion in NWA 2086 CV3

From: Jeff Kuyken <info_at_meteoritecentral.com>
Date: Tue, 10 Aug 2010 19:25:15 +1000
Message-ID: <3046D3A890ED49F4AA55CB8B69AB8EB3_at_JeffPC>

G'day Mike,

Interesting piece. I've seen a bit of a new CV3 meteorite coming out from
Morocco lately and much of it looks similar to yours. Firstly, take a look
at this page on Dark Inclusions:

http://www.meteorites.com.au/odds&ends/DarkInclusions.html

It could be possible that the unusual inclusion in yours is a weathered one
of these. But at the same time, this new CV material coming out of Morocco
is different to the stuff I've seen in the past. I think the only way I can
explain it is to say that it almost appears 'muddy'. I guess it's like
saying that there are a few largish chondrules set in a very fine-grained
'muddy' matrix. It's possible yours could be an exaggerated example of that?

Nice piece,

Jeff


----- Original Message -----
From: "Galactic Stone & Ironworks" <meteoritemike at gmail.com>
To: "Meteorite List" <meteorite-list at meteoritecentral.com>
Sent: Tuesday, August 10, 2010 10:28 AM
Subject: [meteorite-list] Weird inclusion in NWA 2086 CV3


> Hi List,
>
> Has anyone ever seen an inclusion like this in a CV3 meteorite? It is
> a brown. featureless, area that snakes through the surrounding matrix
> and chondrules. I have seen light and dark inclusions in different
> carbonaceous meteorites, including Allende, but I have not seen an
> inclusion like this one. I cut several fragments of this meteorite
> and most had a predominately dark-matrix lithology. One fragment had
> a small portion of dark matrix lithology, and a predominate
> lighter-grey matrix lithology. It was in this light-matrix stone that
> this weird "glassy" brown inclusion appeared during cutting. It
> resembles caramel and has a slick texture compared to the rest of the
> meteorite. Under the loupe, it appears very fine grained, almost
> glassy, like an olivine. It does not appear to be oxidation of any
> kind. The inclusion ran through the entire fragment and I have 4
> different pieces that show it. Besides this inclusion, there is the
> expected mixture of chondrules and CAI's. The pieces shown in the
> photos are rough-sawn - no sanding or polishing yet. The pieces shown
> are an endcut and a slice. The endcut weighs 5.18g and the slice
> weighs 3.27g.
>
> The close-up photo of the "?" (question mark) shaped inclusion is the
> clearest. I'll try to snap some better photos tomorrow under outside
> natural lighting.
>
> http://i268.photobucket.com/albums/jj24/Meteoritethrower/2086-inclusion-3.jpg
>
> http://i268.photobucket.com/albums/jj24/Meteoritethrower/2086-inclusion-1.jpg
>
> http://i268.photobucket.com/albums/jj24/Meteoritethrower/2086-inclusion-2.jpg
>
> Does anyone know what this inclusion might be?
>
> Best regards,
>
> MikeG
>
>
> --
> ------------------------------------------------------------
> Mike Gilmer - Galactic Stone & Ironworks Meteorites
> http://www.galactic-stone.com
> http://www.facebook.com/galacticstone
> ------------------------------------------------------------
> ______________________________________________
> Visit the Archives at
> http://www.meteoritecentral.com/mailing-list-archives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
>
Received on Tue 10 Aug 2010 05:25:15 AM PDT