The Stubenberg meteorite-An LL6 chondrite fragmental breccia recovered soon after precise prediction of the strewn field

Type Article
Date 2017-08
Language English
Author(s) Bischoff Addi1, Barrat Jean-AlixORCID2, Bauer KerstinORCID3, Burkhardt Christoph1, Busemann Henner3, Ebert SamuelORCID1, Gonsior MichaelORCID4, Hakenmueller Janina5, Haloda Jakub6, Harries DennisORCID7, Heinlein Dieter8, Hiesinger Harald1, Hochleitner Rupert9, Hoffmann Viktor10, Kaliwoda Melanie9, Laubenstein MatthiasORCID11, Maden ColinORCID3, Meier Matthias M. M.3, Morlok Andreas1, Pack Andreas12, Ruf Alexander13, 14, Schmitt-Kopplin PhilippeORCID13, 14, Schonbachler Maria3, Steele Robert C. J.3, Spurny PavelORCID15, Wimmer Karl16
Affiliation(s) 1 : Westfal Wilhelms Univ Munster, Inst Planetol, Wilhelm Klemm Str 10, D-48149 Munster, Germany.
2 : Univ Bretagne Occidentale, Inst Univ Europeen Mer, Pl Nicolas Copernic, F-29280 Plouzane, France.
3 : Swiss Fed Inst Technol, Inst Geochem & Petr, Clausiusstr 25, CH-8092 Zurich, Switzerland.
4 : Univ Maryland, Ctr Environm Sci, Chesapeake Biol Lab, 146 Williams St, Solomons, MD 20688 USA.
5 : Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
6 : Czech Geol Survey, Geol 6, CZ-15200 Prague, Czech Republic.
7 : Friedrich Schiller Univ Jena, Inst Geowissensch, Carl Zeiss Promenade 10, D-07745 Jena, Germany.
8 : German Fireball Network, Lilienstr 3, D-86156 Augsburg, Germany.
9 : Mineral Staatssammlung Munchen SNSB, Theresienstr 41, D-80333 Munich, Germany.
10 : Eberhard Karls Univ Tubingen, Dept Geosci, Holderlinstr 12, D-72074 Tubingen, Germany.
11 : Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Via G Acitelli 22, I-67100 Assergi, AQ, Italy.
12 : Univ Gottingen, Geowissensch Zentrum, Goldschmidtstr 1, D-37077 Gottingen, Germany.
13 : Helmholtz Zentrum, German Res Ctr Environm Hlth, Analyt BioGeoChem, Ingolstadter Landstr 1, D-85764 Neuherberg, Germany.
14 : Tech Univ Munich, Chair Analyt Food Chem, D-85354 Freising Weihenstephan, Germany.
15 : Czech Acad Sci, Astron Inst, Fricova 298, CZ-25165 Ondrejov, Czech Republic.
16 : RiesKraterMuseum, Eugene Shoemaker Pl 1, D-86720 Nordlingen, Germany.
Source Meteoritics & Planetary Science (1086-9379) (Wiley), 2017-08 , Vol. 52 , N. 8 , P. 1683-1703
DOI 10.1111/maps.12883
WOS© Times Cited 17
Abstract

On March 6, 2016 at 21: 36: 51 UT, extended areas of Upper Austria, Bavaria (Germany) and the southwestern part of the Czech Republic were illuminated by a very bright bolide. This bolide was recorded by instruments in the Czech part of the European Fireball Network and it enabled complex and precise description of this event including prediction of the impact area. So far six meteorites totaling 1473 g have been found in the predicted area. The first pieces were recovered on March 12, 2016 on a field close to the village of Stubenberg (Bavaria). Stubenberg is a weakly shocked (S3) fragmental breccia consisting of abundant highly recrystallized rock fragments embedded in a clastic matrix. The texture, the large grain size of plagioclase, and the homogeneous compositions of olivine (Fa(31.4)) and pyroxene (Fs(25.4)) clearly indicate that Stubenberg is an LL6 chondrite breccia. This is consistent with the data on O, Ti, and Cr isotopes. Stubenberg does not contain solar wind-implanted noble gases. Data on the bulk chemistry, IR spectroscopy, cosmogenic nuclides, and organic components also indicate similarities to other metamorphosed LL chondrites. Noble gas studies reveal that the meteorite has a cosmic ray exposure (CRE) age of 36 +/- 3 Ma and that most of the cosmogenic gases were produced in a meteoroid with a radius of at least 35 cm. This is larger than the size of the meteoroid which entered the Earth's atmosphere, which is constrained to <20 cm from short-lived radionuclide data. In combination, this might suggest a complex exposure history for Stubenberg.

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Bischoff Addi, Barrat Jean-Alix, Bauer Kerstin, Burkhardt Christoph, Busemann Henner, Ebert Samuel, Gonsior Michael, Hakenmueller Janina, Haloda Jakub, Harries Dennis, Heinlein Dieter, Hiesinger Harald, Hochleitner Rupert, Hoffmann Viktor, Kaliwoda Melanie, Laubenstein Matthias, Maden Colin, Meier Matthias M. M., Morlok Andreas, Pack Andreas, Ruf Alexander, Schmitt-Kopplin Philippe, Schonbachler Maria, Steele Robert C. J., Spurny Pavel, Wimmer Karl (2017). The Stubenberg meteorite-An LL6 chondrite fragmental breccia recovered soon after precise prediction of the strewn field. Meteoritics & Planetary Science, 52(8), 1683-1703. Publisher's official version : https://doi.org/10.1111/maps.12883 , Open Access version : https://archimer.ifremer.fr/doc/00638/75023/