[meteorite-list] report Munich show and AD

[Alexander Seidel]

Thank you, Svend - interesting and helpful post!

Alex
Berlin/Germany


-------- Original-Nachricht --------
> Datum: Sun, 4 Nov 2007 13:03:01 +0100
> Von: "Dr. Svend Buhl" <info at niger-meteorite-recon.de>
> An: "Alexander Seidel" <gsac at gmx.net>
> CC: "Meteorite Mailing List" <meteorite-list at meteoritecentral.com>
> Betreff: Re: [meteorite-list] report Munich show and AD

> As Greg has already pointed out on the list earlier the Chergach/Erg Chech
> or "Mali" material as it has been dubbed by sellers can be clearly 
> distinguished from e.g. Benguerir, Amgala, Bensour and Bassikounou by 
> comparing broken or cut surfaces.
> 
> "Mali" has a dark ash grey color with meandering unevenly distributed 
> blueish areas that often enclose dark grey patches, "Mali" is brecciated
> and 
> diplays clasts full of very small but distinct chondrules. "Mali" shows no
> black shock veining as for example in Bassikounou. Unless the Bassikounou 
> fall did not drop a second hitherto unknown lithology these two are
> clearly 
> separate events. I will later post some comparison pictures on my website.
> 
> With completely crusted individuals separation is difficult. The genuine 
> "Mali" material I have seen however did not show any soil staining and was
> completely lacking the red laterite dust that can be found on many of the 
> Bassikounou specimens. Differention by the grade of wheathering is not 
> possible. Both falls are to recent for that.
> 
> As to your question, I have the impression that the new material can
> safely 
> be ordered from several resellers in Morocco. Upon request I can recommend
> a 
> number uf reliable sources in Morocco to you.
> All my Chergach ("Mali") material I have purchased directly from Morocco
> was 
> genuine material from a different event then the ones mentioned above. In 
> Munich I purchased a 125gm oriented fragment among some genuine "Mali" 
> stones and that particular specimen by close inspection turned out to be a
> Bassikounou. The same seller also offered me a another piece as "Mali"
> that 
> I had already described in the Bassikounou catalog and that could clearly
> be 
> recognized by its bright red impact marks.
> 
> On the other hand this same seller had a number of splendid regmaglypted 
> individuals in the kg range on his table that could easily and without
> doubt 
> be recognized as from the Chergach strewfield by examining the broken 
> surfaces.
> 
> The cause of the confusion in my opinion has to do with the complete lack
> of 
> confirmed intelligence on the "Mali" event. The makeshift name "Mali" 
> already indicates the misery that neither an exact date nor exact 
> coordinates were available for this fall in the beginning when the 
> distribution started. The information provided by A. Habibi that the 
> distribution ellipse is located near Chergach in the Erg Chech did not yet
> make it to most of the sellers offering the new material in Munich. At
> least 
> on request they could not tell you anything about the origin of their
> "Mali" 
> material.
> 
> I'll post any emerging insights on this on my page and I encourage
> everyone 
> to share their knowledge as well, as it would be a great loss if the 
> background of this beautiful meteorite remains a mystery.
> 
> Svend
> 
> 
> 
> ----- Original Message ----- 
> From: "Alexander Seidel" <gsac at gmx.net>
> To: "Dr. Svend Buhl" <info at niger-meteorite-recon.de>; 
> <meteorite-list at meteoritecentral.com>
> Sent: Sunday, November 04, 2007 1:18 AM
> Subject: Re: [meteorite-list] report Munich show and AD
> 
> 
> >> Among the few recent falls there seems to be a growing confusion among 
> >> the
> >> Mahgreb sellers.  Labels have obviously been accidentally misplaced and
> >> meteorites ended up in the wrong boxes. I can only repeat to encourage
> >> people to take but the geatest care in the assignment of the sample and
> >> its documentation.
> >
> > Svend, you address "the few recent falls" here, so does your argument
> also 
> > apply to that new Mali meteorite at the moment, or is this new one under
> > good control and can be clearly distinguished from all the others right 
> > now at the so-called marketplace...??
> >
> > Alex
> > Berlin/Germany
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