[meteorite-list] Grein 004/Tafassasset

From: Jeff Grossman <jgrossman_at_meteoritecentral.com>
Date: Wed, 26 Nov 2008 20:45:12 -0500
Message-ID: <OFA02198B4.7F6B5655-ON8525750E.0009A8BE_at_usgs.gov>

I want to reiterate something I've said before:

There is no such thing as an "official"
classification. The Meteoritical Bulletin, the
Catalogue of Meteorites, the MetBull
Database, "A to Z," MetBase, other catalogs, and
all research papers and abstracts are
publications in which authors/editors classify
meteorites according to their own opinions. In
the case of the Bulletin, the editors are the
members of the Nomenclature Committee. However,
there is no official
Meteoritical-Society-endorsed classification
scheme for them to apply, so they do whatever
they like(and this changes with their membership).

Jeff

At 11:51 AM 11/26/2008, Zelimir Gabelica wrote:
>Hi Norbert, Bernd, Harald, List,
>
>Thank you very much for the info about "Grein 004/Tenere 001/Tafa".
>I indeed read that somewhere sometimes but I
>have not my archives on hand here in France (BM
>Met. Catalog (Grady) indeed currently gives most of the meteorite synonyms).
>
>Bernd said:
>
>"Grein 004" as well as "Tenere 001" are just synonyms for the
>Tafassasset Freiburg mass, a single stone weighing 3610 grams.
>It's no pairing.
>
>Bernd, Norbert, does that mean that the tkw for
>Tafassasset is then 110 kg (Franch find) + 3.61
>kg ("Grein 004") = 113.61 kg ? (thus
>27 at 113.61kg and not 26 at 110 kg as in "A to Z" ?).
>Met. Bull. indeed reports the tkw as 114 kg
>(approx), which well fits the figure.
>
>The official type so far is CR-an (Met. Bull.),
>or PAUNGR ("A to Z"). Do you agree ?
>I know that both meteorites were studied
>separately and that the real type could not be defined.
>
>Note that Weir (his web site) reports, for T-1
>(= Tenere 001), a total weight of exactly 3.636
>kg, also that is "brachinite-related" and that
>Tafa itself (separately listed by Weir but said
>being paired with T-1) is a "PAUNGR, possibly CR-related".
>More recent studies seem to still question that CR-relation...
>
>I understand the real type is yet to be defined
>and that the tkw is close to 27 at 114 kg, more specifically 12 at 113.636 kg
>
>Norbert, do you think Prof Otto knows more on
>that or whether they continue to study this meteorite in Freiburg ?
>
>And Bernd, what you mean by "it's no pairing" ?
>Everybody seems to agree so far that the "Freiburg mass" is also Tafa. (?)
>
>All my best,
>
>Zelimir
>
>
>A 12:19 26/11/2008 +0100, vous avez ?crit :
>>Hi Zelimir,
>>
>>I don't know for NWA 3144, but "Grein 004" is a synonym for Tafassasset -
>>I'm pretty sure of that. "Grein 004" was a working name used for the smaller
>>mass which was later named as the Tafassasset "Freiburg mass", classified
>>and studied by my friend Dr. Otto in Freiburg. You might want to contact
>>Juergen Otto in this matter, just to make sure - he can be reached at
>>Juergen.Otto at minpet.uni-freiburg.de
>>
>>Hope this helps...
>>
>>All the best,
>>Norbert
>>
>>-----Urspr?ngliche Nachricht-----
>>
>>Hi List,
>>
>>Heredown is a message of Roger Warin (Belgium) that he apparently can not
>>send through his server.
>>
>>I have my own question:
>>does anybody know the official status of meteorite "Grein 004" ? (not in
>>Met. Bull.)
>>
>>Thanks!
>>
>>Zelimir
>>----------------------
>>
>>Hello List,
>>
>>I have put some pics of NWA 3144 (CV3) thin sections on our local site.
>>See here:
>>http://www.agab.be/meteorites/Thin/thin.html
>>
>>Met. Bull. reports that this meteorite (found or purchased by the Hup?s)
>>still has a provisional status.
>>I'd be glad to learn more about this meteorite.
>>Could someone provide some data (if any) or send further comments on its
>>status ?
>>Thanks and all the best,
>>
>>Roger.
>>
>>
>>
>>Prof. Zelimir Gabelica
>>Universit? de Haute Alsace
>>ENSCMu, Lab. GSEC,
>>3, Rue A. Werner,
>>F-68093 Mulhouse Cedex, France
>>Tel: +33 (0)3 89 33 68 94
>>Fax: +33 (0)3 89 33 68 15
>>
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>>Meteorite-list at meteoritecentral.com
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>
>Prof. Zelimir Gabelica
>Universit? de Haute Alsace
>ENSCMu, Lab. GSEC,
>3, Rue A. Werner,
>F-68093 Mulhouse Cedex, France
>Tel: +33 (0)3 89 33 68 94
>Fax: +33 (0)3 89 33 68 15
>
>______________________________________________
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>Meteorite-list mailing list
>Meteorite-list at meteoritecentral.com
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Dr. Jeffrey N. Grossman phone: (703) 648-6184
US Geological Survey fax: (703) 648-6383
954 National Center
Reston, VA 20192, USA
Received on Wed 26 Nov 2008 08:45:12 PM PST