[meteorite-list] ORANGE fresh Chelyabinsk (was: Two special Chelyabinsk individualswith Brown Lee-side Crust - color-oriented!)

From: Adam Hupe <raremeteorites_at_meteoritecentral.com>
Date: Wed, 29 May 2013 13:44:50 -0700 (PDT)
Message-ID: <1369860290.17850.YahooMailNeo_at_web122006.mail.ne1.yahoo.com>

I will take a SWAG (Scientific Wild Ass Guess) at the color differential.


I know when I was having a glass blower prepare NWA 482 pendants that
some of the material would turn red.? He was exposing material to the
oxidizing part of the flame and not the reducing part.? We corrected the problem after analyzing the situation.

When a meteoroid enters the atmosphere, the plasma might be more oxidizing on the trailing edge.


Adam




________________________________
From: Graham Ensor <graham.ensor at gmail.com>
To: Martin Altmann <altmann at meteorite-martin.de>
Cc: meteorite list <meteorite-list at meteoritecentral.com>
Sent: Wednesday, May 29, 2013 11:35 AM
Subject: Re: [meteorite-list] ORANGE fresh Chelyabinsk (was: Two special Chelyabinsk individualswith Brown Lee-side Crust - color-oriented!)


Hi Martin....Svend beat us too it on his wonderful website ages
ago....see here for his explanation.

http://www.niger-meteorite-recon.de/en/Meteorite_fusion_crust_2.htm

Look forward to seeing you in Ensisheim.

Graham

On Wed, May 29, 2013 at 12:34 PM, Martin Altmann
<altmann at meteorite-martin.de> wrote:
> Hi Steve, Fred, all...
>
> Marvelous!
>
> Now we saw examples of Bensour, "Mauretania", Chelyabinsk and have from old
> literature Pultusk and Mocs..
>
> ...seems that Captain Blood's "Orientata" needs a new chapter:
> "Color-Orientation"!
>
> (Fascinating, after such a long time spent with meteorites, we from the
> Meteorite House weren't aware of that phenomenon,
> you always can learn something new!).
>
> Though we have to have some discipline and to be cautious, not to establish
> a new artificial hype or to create a new fashion, multiplying the prices,
> as it had happened, if you remember, first with the "hammers", then with the
> "meteorites with holes" and again afterwards with the "irons with impact
> craters".
>
> At least now the Ensisheim visitor have an additional hint, what to look
> for, if they'll rummage the tables of the Russian colleagues, which will sag
> from the loads of fantastic Chelyabinsk individuals.
>
> Cheers!
> Meteorite House
>
>
> On Tue, May 28, 2013 at 9:58 PM, Steve Witt <stelor96 at yahoo.com> wrote:
>> Martin, Fred and all,
>>
>> I just got in some of the new meteorite from Mauritania showing the
>> same thing. No black lipping, but brown crust on the back side of a
>> fresh stone.
>>
>> Front:? http://www.flickr.com/photos/stevewitt/8870872109/
>>
>> Back:? http://www.flickr.com/photos/stevewitt/8870872297/
>>
>>
>>
>> Steve Witt
>> IMCA #9020
>> http://imca.cc/
>>
>>
>> ________________________________
>> From: Martin Altmann <altmann at meteorite-martin.de>
>> To: meteorite-list at meteoritecentral.com
>> Sent: Monday, May 27, 2013 4:03 PM
>> Subject: Re: [meteorite-list] (House-AD): ORANGE fresh Chelyabinsk (was:
>> Two special Chelyabinsk individualswith Brown Lee-side Crust -
>> color-oriented!)
>>
>>
>> Hi Fred,
>>
>> Exactly and Wow!
>> With your Bensour it seems that just the same had happened!
>> Has also the black rim!
>>
>>
>>>My guess at the time I got it, was simply a matter of primary fusion
>>>crust
>> (the brownish one) and secondary fusion crust >(the darker one). Could
>> it be a matter of altitude where it was formed? Speed & temperature of
>> fusion?...
>>
>> There we definitely have to ask our experts of aerodynamics and
>> chemistry here.
>>
>> To me it's evident, because the black crust lips over the brown one,
>> that that brown on the back must have been formed before the crust on the
> apex.
>>
>> There are going things in flight on the back of the stones....
>> remember the Tamdakht-Couscous or the 12.5kg-flat heat-shield, which
>> had also such fragments incorporated in the skin..
>>
>> Now these color-crusts with Chelyabinsk (and Tissint).
>>
>> Here, look, our most shocking example!
>> Is something for Jan, Menno or Rob,
>> Because half of the stone is almost:? ? ORANGE!
>>
>> Has 63.55g
>>
>> These sides are normal:
>> http://www.meteoritenhaus.de/img/Chelyabinsk_63_55_g_01.JPG
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_63_55_g_02.JPG
>>
>> But look at that!
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_63_55_g_03.JPG
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_63_55_g_04.JPG
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_63_55_g_05.JPG
>>
>> Hmm, shall we sell it too?
>> O.k....
>>
>> :-)
>> Your Meteorite House
>>
>>
>>
>> Von: Meteoriteshow [mailto:meteoriteshow at free.fr]
>> Gesendet: Montag, 27. Mai 2013 17:32
>> An: 'Martin Altmann'; meteorite-list at meteoritecentral.com
>> Betreff: RE: [meteorite-list] (House-AD): Two special Chelyabinsk
>> individualswith Brown Lee-side Crust - color-oriented!
>>
>> Hi All again,
>>
>> It seems that my link didn't work; let me try again, actually I have
>> several
>> pictures:
>>
>> http://meteoriteshow.free.fr/images/for_sale/July_2007/Benguerir/bengu
>> erir-7
>> 9.6g(1).jpg
>>
>> http://meteoriteshow.free.fr/images/for_sale/July_2007/Benguerir/bengu
>> erir-7
>> 9.6g(7).jpg
>>
>> http://meteoriteshow.free.fr/images/for_sale/July_2007/Benguerir/bengu
>> erir-7
>> 9.6g(6).jpg
>>
>> http://meteoriteshow.free.fr/images/for_sale/July_2007/Benguerir/bengu
>> erir-7
>> 9.6g(3).jpg
>>
>>
>> Cheers
>>
>> Fred
>> www.meteoriteshow.com
>> IMCA #2491
>>
>> -----Message d'origine-----
>> De : meteorite-list-bounces at meteoritecentral.com
>> [mailto:meteorite-list-bounces at meteoritecentral.com] De la part de
>> Martin Altmann Envoy? : lundi 27 mai 2013 14:26 ? :
>> meteorite-list at meteoritecentral.com
>> Objet : [meteorite-list] (House-AD): Two special Chelyabinsk
>> individualswith Brown Lee-side Crust - color-oriented!
>> Importance : Haute
>>
>> Hello there,
>>
>> we have to share with you a pretty exciting observation.
>> It was here already on the list, that some of you found on the
>> first-pick Chelyabinskis places with a brownish, nevertheless fresh fusion
> crust.
>> That
>> phenomenon btw. you had sometimes also on a few Tissints, there the
>> brown crust was even translucent (were horribly difficult to sell,
>> because people watching the photos were skeptical, thought, they
>> wouldn't be fresh, but weathered - and that, where no iron is present
>> in Tissint to rust).
>>
>> Many of you blossomed during the last 3 months into true
>> Chelyabinsk-experts, so please, pay attention to those two individuals
>> and tell us your
>> opinion:
>>
>> 75.45g
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_75_45_g_01.JPG
>> http://www.meteoritenhaus.de/img/Chelyabinsk_75_45_g_02.JPG
>> http://www.meteoritenhaus.de/img/Chelyabinsk_75_45_g_03.JPG
>>
>>
>> 68.37g
>>
>> http://www.meteoritenhaus.de/img/Chelyabinsk_68_37_g_01.JPG
>> http://www.meteoritenhaus.de/img/Chelyabinsk_68_37_g_02.JPG
>> http://www.meteoritenhaus.de/img/Chelyabinsk_68_37_g_03.JPG
>> http://www.meteoritenhaus.de/img/Chelyabinsk_68_37_g_04.JPG
>>
>>
>> Well, baffling, aren't they?
>>
>> Both of them have a side, and ONLY one side, which is fully coated by
>> the brown crust, while all other sides are black, as usual.
>>
>> Here:
>> http://www.meteoritenhaus.de/img/Chelyabinsk_68_37_g_02.JPG
>>
>> And here:
>> http://www.meteoritenhaus.de/img/Chelyabinsk_75_45_g_02.JPG
>>
>>
>> And you see, that the brown-side is framed all around by a lipping,
>> which is black, hence most would therefore say, only because of the
>> rollover-lip, that the stones are flight-oriented.
>> At least one can say, by means of the circular lipping around the
>> edges, that the stones had for a longer time a stable position in flight.
>> And that the brown side is the backside, the lee-side.
>>
>> And what is striking, is, that the lipping overlaps the brown crust,
>> hence the brown crust must have formed simultaneously, while the front
>> surface was melting.
>>
>> Now one could speculate, what could have caused that different crust -
>> from the chip missing in one of the stones, we see that the material
>> beneath the brown crust isn't special (anyway, on the sides the fusion
>> crust for the same material is black).
>> Thus maybe the different color could stem from a lack of oxygen, when
>> it melted, on the lee-side of the stone in flight, where one has a low
>> pressure/partial vacuum?
>>
>> We think, one could even speak of a new category of orientation:
>>
>> COLOR-ORIENTED!
>>
>>
>> Well, if you like to have them, what shall we do with so special
>> specimens...
>> Let's make 20$/g to be among the very cheapest Chelyabinsk-offerers,
>> + 50cents for the lipping, where others would scream: oriented, oriented!
>> + 1.5$/g for the fantastic "color-orientation"...
>>
>> Makes? ? 22$/g.
>>
>>
>> Fascinating, aren't they?
>>
>> Your Meteorite House Team
>>
>>
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Received on Wed 29 May 2013 04:44:50 PM PDT