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Bartoschewitz, R.* ; Appel, P.* ; Barrat, J.A.* ; Bischoff, A.* ; Caffee, M.W.* ; Franchi, I.A.* ; Gabelica, Z.* ; Greenwood, R.C.* ; Harir, M. ; Harries, D.* ; Hochleitner, R.* ; Hopp, J.* ; Laubenstein, M.* ; Mader, B.* ; Marques, R.* ; Morlok, A.* ; Nolze, G.* ; Prudêncio, M.I.* ; Rochette, P.* ; Ruf, A. ; Schmitt-Kopplin, P. ; Seemann, E.* ; Szurgot, M.* ; Tagle, R.* ; Wach, R.A.* ; Welten, K.C.* ; Weyrauch, M.* ; Wimmer, K.*

The Braunschweig meteorite - a recent L6 chondrite fall in Germany.

Chem. Erde-Geochem. 77, 207-224 (2016)
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On April 23rd 2013 at 2:07. a.m., a 1.3. kg meteorite fell in the Braunschweig suburb Melverode (52° 13' 32.19″ N. 10° 31' 11.60″ E). Its estimated velocity was 250. km/h and it formed an impact pit in the concrete fall site with a diameter of 7. cm and a depth of 3. cm. Radial dust striae are present around the impact pit. As a result of the impact, the meteorite disintegrated into several hundred fragments with masses up to 214. g. The meteorite is a typical L6 chondrite, moderately shocked (S4) - but with a remarkably high porosity (up to 20. vol%). The meteorite was ejected from its parent body as an object with a radius of about 10-15. cm (15-50. kg). The U,Th-He gas retention age of ∼550 Ma overlaps with the main impact event on the L-chondrite parent body ∼470 Ma ago that is recorded by many shocked L chondrites. The preferred cosmic-ray exposure age derived from production of radionuclides and noble gas isotopes is (6.0. ±. 1.3) Ma.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Braunschweig Meteorite ; Bulk Chemistry ; Fall Reconstruction ; Ir Spectroscopy ; L Chondrite ; Noble Gas Isotopes ; Organic Matter ; Petrology And Mineralogy ; Radionuclides ; Specific Heat; Production-rates; Shock Metamorphism; Stony Meteorites; Classification; Temperatures; Particles; Spectra; Density; Breccia
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