The Braunschweig meteorite − a recent L6 chondrite fall in Germany

1Rainer Bartoschewitz et al. (>10)*
Chemie der Erde – Geochemistry (in Press) Link to Article [http://dx.doi.org/10.1016/j.chemer.2016.10.004]
1Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany
*Find the extensive, full author and affiliation list on the publishers website
Copyright Elsevier

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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