[meteorite-list] Met Bulletin Update - Braunschweig Approved - April 23, 2013 Fall

[Graham Ensor]

Was there any hunting around the area to look for other pieces from
the fall....?

Graham

On Mon, Sep 23, 2013 at 9:45 PM, karmaka <karmaka-meteorites at t-online.de> wrote:
> Well, there was quite some excitement among meteorite aficionados
> in Germany, but it's true that even in the German media this fall was almost not covered.
>
> It's good to have witnessed another German fall after more than a decade.
> It's unfortunate though that it shattered severely on impact.
>
> Best regards
>
> Martin
>
>
> Von: "Galactic Stone & Ironworks" <meteoritemike at gmail.com>
>  An: Meteorite List <meteorite-list at meteoritecentral.com>
>  Betreff: [meteorite-list] Met Bulletin Update - Braunschweig Approved - April 23, 2013 Fall
>  Datum: Mon, 23 Sep 2013 21:39:58 +0200
>
> Hi Bulletin Watchers,
>
>  Lost in all of the excitement about Chelyabinsk was the 04-23-13 fall
>  of the Braunschweig L6 meteorite in Germany.
>
>  Link - http://www.lpi.usra.edu/meteor/metbull.php?code=58083
>
>  Write-up :
>
>  Braunschweig        52°13.548’N, 10°31.193’E
>  Niedersachsen, Germany
>  Fell: 2013 Apr 23, 02:05 a.m.
>  Classification: Ordinary chondrite (L6)
>
>  History: (R. Bartoschewitz, Bart) Erhard Seemann recognized a rock
>  impact in the concrete pavement in his yard 3 m from his front door
>  when he came home on April 23, 2013, in the morning. He documented his
>  observation and collected the main fragments (~700 g) of the nearly
>  complete crushed stone. A neighbor heard a strong hum followed by a
>  loud crash that night at about 2:10 a.m.  In the morning he found
>  several small rock fragments (~50 g) in his gateway. In Ahlum village,
>  Julian Mascow was surprised by a bright flare coming from the SE,
>  ending in a short tracer just over his head. About 90 s later he was
>  frightened by an explosion and ensuing rattling sound around him. Mark
>  Vornhusen’s web camera documented the fireball from Vechta. When
>  Rainer Bartoschewitz documented the meteorite impact, he discovered
>  many further small fragments (~500 g) within 18 m of the others.
>
>  Physical characteristics: (R. Bartoschewitz, Bart) One meteorite
>  individual of about 1.3 kg broken into hundreds of small fragments
>  after impacting concrete pavement. The biggest fragment, 214 g, stuck
>  in the concrete making a 7 cm diameter, 3 cm deep impression. Other
>  fragments were <30 g. The gray-white meteorite material is covered by
>  a 0.4 mm thick dull black fusion crust with abundant 50 μm cracks.
>  Magnetic susceptibility log χ = 4.75.
>
>  Petrography: (R. Bartoschewitz, Bart) Recrystallized matrix of
>  olivine, pyroxene (0.02-0.5 mm) and secondary feldspar bear poorly
>  developed and deformed, dominantly barred olivine chondrules (0.5 to
>  15 mm, av. 1.5 mm), metal, troilite and chromite. Dark metal-troilite
>  veins (50 µm) cross the meteorite. Olivine shows rather sharp
>  extinction and irregular cracks.
>
>  Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel)
>  olivine Fa24.3-26.0 (mean Fa25.2±0.40, n=33); Ca-poor pyroxene
>  Fs20.8-21.7Wo1.0-1.8 (mean Fs21.3±0.24Wo1.6±0.20, n=12); Ca-rich
>  pyroxene Fs8.1-8.8Wo44.4-45.2 (mean Fs8.4±0.40Wo44.7±0.35, n=4);
>  feldspar An11-18Or 4-10, chromite Cr/(Cr+Al)=88.3, Fe/(Fe+Mg)=79.8.
>  Kamacite Ni=4.7-6.2, Co=1.0; taenite Ni=20-34, Co=0.3-0.7 (all in
>  wt.%)
>
>  Classification: L chondrite (L6, S4, W0)
>
>  Specimens: Main mass of about 700 g, E. Seemann, Braunschweig; type
>  specimen of 25 g, MKBraun; 500 g, Bart
>
>
>  Best regards and happy huntings,
>
>  MikeG
>
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