[meteorite-list] Weird inclusion in NWA 2086 CV3

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Tue, 10 Aug 2010 09:16:24 -0400
Message-ID: <AANLkTim5EDM5v2NfO6B6FPSoS8POfnt73vC6ZuvHoMQO_at_mail.gmail.com>

Hi Jeff and List,

The color balance in my first set of photos was way off. Here is
another photo showing what the color should look like. This photo is
split, the left shows my original photo, and the right shows a better
representation of what the stones actually look like in person -

http://i268.photobucket.com/albums/jj24/Meteoritethrower/2086-inclusion.jpg

Here is a photo of some other slices from the same batch. Notice that
the matrix is darker in these pieces.

http://i268.photobucket.com/albums/jj24/Meteoritethrower/2086-slices.jpg

The fragment with the brown "caramel-like" inclusion was the smallest
of the bunch and more weathered than the others. So I am thinking
that there must have been a surface fracture that extended down into
the interior of the stone. Weathering products intruded through this
crack and the brown "inclusion" is probably just a clay-like
replacement mineral. If the brown area was a typical rust stain, then
one would see chondrules and other features under the staining. But
this brown area is not a stain because it flows around the chondrules
and it extends all the way through the matrix. None of this material
had a chance to rust during cutting because it literally went straight
from the saw into a waiting hot oven. It was wet for about 60-90
seconds before it went into the oven.

Well, whatever it is, I'm keeping one slice of it, giving one to my
source, and selling the other two pieces.

5.18g endcut and 3.27g slice are now available to list members for
$10/g with free shipping.

Contact me off-list if interested.

For those who may be wondering - I spoke to my source about it (after
someone emailed me off-list questioning whether or not this material
is actually NWA 2086), and I am satisfied that this material is 2086.

Best regards,

MikeG




On 8/10/10, Jeff Kuyken <info at meteorites.com.au> wrote:
> 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
>> ------------------------------------------------------------
>> ______________________________________________
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>>
>
>

-- 
------------------------------------------------------------
Mike Gilmer - Galactic Stone & Ironworks Meteorites
http://www.galactic-stone.com
http://www.facebook.com/galacticstone
------------------------------------------------------------

Received on Tue 10 Aug 2010 09:16:24 AM PDT