[meteorite-list] Met Bulletin Update - Braunschweig Approved - April 23, 2013 Fall
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 : Braunschweig52°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 -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Met Bulletin Update - Braunschweig Approved - April 23, 2013 Fall
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 meteoritem...@gmail.com An: Meteorite List meteorite-list@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 : Braunschweig52°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 -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Met Bulletin Update - Braunschweig Approved - April 23, 2013 Fall
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-meteori...@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 meteoritem...@gmail.com An: Meteorite List meteorite-list@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 : Braunschweig52°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 -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
