[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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