[meteorite-list] Parallel Banding in Vigarano

[Meteoriteshow]

Hi Martin, Bernd and All,

What do you think about those different kinds of DIs present in Tnz057 (C4 an)?
http://meteoriteshow.free.fr/images/b117/tan057-slices-MNHN(oct-2005)/tnz057-slice_nr7-59.3g(2-Dark_Inclusions)-web.jpg

I still do not really have clear scientific information about them... It seems that the bigger one is quite similar to the matrix of
the main structure but I have no clue about the smaller one...

Kind regards,

Frederic Beroud
http://www.meteoriteshow.com
IMCA member # 2491 (http://www.imca.cc/)

----- Original Message -----
From: "Martin Horejsi" <accretiondesk at gmail.com>
To: <bernd.pauli at paulinet.de>
Cc: <Meteorite-list at meteoritecentral.com>
Sent: Tuesday, November 01, 2005 12:24 AM
Subject: Re: [meteorite-list] Parallel Banding in Vigarano


Hi Bernd,

Wow, sharp eyes.

When contrasting the two DIs in the overall slice, there is a distinct
difference in color. Any thoughts? Also, the shape(s) of the DI(s) you
pointed out is rather striking.

Is that another larger less dark DI in the upper right, essentially in
the mirror opposite position of the dark DI with the CAIs in the
middle?

Martin


On 31 Oct 2005 23:07:48 UT, bernd.pauli at paulinet.de
<bernd.pauli at paulinet.de> wrote:
> > Hi Bernd, Matteo and All,
>
> Hello Martin, Matteo, and List,
>
> "if you look at the pic, the DI (?) appears just off of center"
>
> Yep, that's one of these DIs!
>
> "I don't see the parallel banding that Bernd
> also mentions. Am I missing it, or is it absent."
>
> I assume that it is only visible in BSE images, in backscattered
> electron images. The first thing I'll do when I get my Vigarano
> pieces from M.C. is, of course, put them under my microscope
> to find out *if* I can detect any signs of that arcuate band texture.
>
> BTW, scrolling down to the two larger Vigarano CAIs in Martin's
> recent Accretion Desk article, you'll find another DI close to and
> a little above the smaller CAI on the left.
>
> Best DI regards,
>
> Bernd
>
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