AW: [meteorite-list] Meteorite with holes?!?

[Jörn Koblitz]

Hi Jeff,

I think, it's weathered out - better "washed out" - matrix material, which has also removed some larger chondrules. Some ordinary chondrites - like Bjurböle or Saratov - got very soft and powdery matrix material. Chondrules can easily be removed from these meteorites.

Jörn

> -----Ursprüngliche Nachricht-----
> Von: Jeff Kuyken [mailto:jeff at meteoritesaustralia.com]
> Gesendet: Mittwoch, 18. August 2004 13:51
> An: Meteorite List
> Betreff: Re: [meteorite-list] Meteorite with holes?!?
> 
> 
> Hey Graham,
> 
> That's a really good point which I also considered too 
> however the stone is
> no less solid than most other ordinary chondrites out there. 
> The holes are
> also too varied in size and often of an irregular nature to 
> be the result of
> dislodged chondrules. Quite a few are also more of an oval shape too.
> Apologies as that's probably a little hard to see in the 
> photos. If they are
> vesicles, I don't know how they could have formed. Maybe the 
> stone was part
> of a larger impact melt?
> 
> Thanks,
> 
> Jeff Kuyken
> I.M.C.A. #3085
> www.meteorites.com.au
>   ----- Original Message -----
>   From: Graham Christensen
>   To: Meteorite List
>   Sent: Wednesday, August 18, 2004 9:10 PM
>   Subject: Re: [meteorite-list] Meteorite with holes?!?
> 
> 
>   It looks to me like the holes are just where chondrules 
> have fallen out of
>   the matrix. From what I understand, vesicles form by gas 
> being "boiled
> out"
>   of liquid rock. That's why they've only been found in a 
> eucrite, because
>   it's an igneous rock. It's wierd that that is the only one 
> that looks like
>   that though. Perhaps a loose matrix or something?
> 
>   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   Graham Christensen
>   voltage at telus.net
>   http://www.geocities.com/aerolitehunter
>   msn messenger: majorvoltage at hotmail.com
> 
> 
>   ----- Original Message -----
>   From: "Jeff Kuyken" <jeff at meteoritesaustralia.com>
>   To: "Meteorite List" <meteorite-list at meteoritecentral.com>
>   Sent: Wednesday, August 18, 2004 5:03 AM
>   Subject: [meteorite-list] Meteorite with holes?!?
> 
> 
>   > G'day List,
>   >
>   > Just received what looks like an ordinary chondrite, but 
> the weird thing
>   is
>   > that it is loaded with holes in the surface. The 37g 
> piece has 6 sides
> of
>   > which every one has some type of hole. They are quite prolific
> throughout
>   > the whole stone and vary widely in size. I've created a 
> quick page at
> the
>   > address below if anyone is interested in taking a look. I 
> will probably
>   > slice it at some stage to check out the interior and will 
> post more
> photos
>   > at that stage. I'd be interested in hearing any comments 
> or theories on
>   this
>   > one as this is the first meteorite I've personally seen 
> with so many
>   holes.
>   >
>   > http://www.meteoritesaustralia.com/features/holes.html
>   >
>   > Cheers,
>   >
>   > Jeff Kuyken
>   > I.M.C.A. #3085
>   > www.meteorites.com.au
>   >
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