[meteorite-list] AD: Special: NWA 5243 - a thought about a fine L3

From: Zelimir.Gabelica at uha.fr <Zelimir.Gabelica_at_meteoritecentral.com>
Date: Thu, 29 May 2008 23:44:10 +0200
Message-ID: <20080529234410.3qmtjc6k42xsgo4k_at_w3mail.univ-mulhouse.fr>

Hi Martin,

Can you save for me the 7.190 g slice (until Ensisheim) ?

Thanks!

Zelimir




Martin Altmann <altmann at meteorite-martin.de> a ??crit? :

> Dear collectors,
>
> it's definitely time again for a Special.
> Today it's about a pretty and fine unequilibrated L3: NWA 5243
>
> Normally we would have to emphasize the aesthetical aspects of type-3
> chondrites, the colourful variety and density of chondrules, wherefore they
> are so esteemed by the initiate and the beginner likewise.
> Also a good mean for wet the appetite, especially if the stone wouldn't be
> that fresh and pretty than NWA 5243, it could be to refer to the sheer
> rareness of that type - let's see the stats, from the 46,445 entries in the
> Bulltin Database only 563 numbers, finds, falls are an L3-type, among them
> only
> 142 are non-Antarctic,
>
> but let's find a hint, why meteorites in general and in particular the 3ers
> are by far more than simple curios, more than only lumps of rocks, falling
> from time to time from sky with a nice light&sound-show, sometimes leaving a
> hole in the ground.
>
> Please take a look!
>
> http://athene.as.arizona.edu/~lclose/teaching/a202/OriEODsk.gif
>
> http://www.2spare.com/_media/imgs/articles/a43_Protoplanetary.jpg
>
> http://astro.wsu.edu/worthey/astro/html/im-planets/circumstellar-disk.jpg
>
> In what for thrilling times we're living! These pictures show the disks of
> gas and dust around new young stars, only since a few years we are able to
> image these protoplanetary disks directly!
>
> In these disk new planets are formed, it takes only a sneezing, not more
> than 10 millions of years, and the disk will have disappeared and a new
> solar system is born.
>
> Type-3 chondrites bring us closest to that moment, when the first lumps
> condensed and accreted from the circumstellar disk, which once surrounded
> our own Sun. They match closest the matter, which first formed the
> planetesimals, and the planetesimals in turn the planets and the Earth.
> Farther back we can't come.
>
> The chemistry, the minerals, the chondrules, their size and the distribution
> of their size in them
> - all preserved to the best in type-3-chondrites - help us to understand,
> what is going on in these circumstellar disks and finally, where we all stem
> from.
>
> With such a meteorite you have a front row seat in modern space exploration.
>
>
> That's also the reason, why we always recommend a Type-3 if we get requests
> from exhibition planners, and that is the reason for collectors, specialized
> solely in irons, for often choosing an L3 od H3 as their only reference
> piece for a stone meteorite.
>
> NWA 5243 has all a L3 needs, with W2 it is fresher than the average and with
> S2 only weakly shocked.
>
> And the ticket for the time machine costs you today:
> 10$ a gram for the small slices and
> 8$ a gram fort he large ones.
> All slices one side polished, one side grinded and better looking than on
> the photos.
>
> http://www.chladnis-heirs.com/special-nwa5243.html
>
>
> Have a pleasant flight!
>
> Stefan Ralew & Martin Altmann
> Chladni's Heirs
> Munich - Berlin
> Fine Meteorites for Science & Collectors
>
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Received on Thu 29 May 2008 05:44:10 PM PDT