TY  - JOUR
AB  - On July 10, 2018 at 21:29 UT extended areas of South-Western Germany were illuminated by a very bright bolide. This fireball was recorded by instruments of the European Fireball Network (EN). The records enabled complex and precise description of this event including the prediction of the impact area. So far six meteorites totaling about 1.23 kg have been found in the predicted location for a given mass during dedicated searches. The first piece of about 12 g was recovered on July 24 close to the village of Renchen (Baden-Wurttemberg) followed by the largest fragment of 955 g on July 31 about five km north-west of Renchen.Renchen is a moderately-shocked (S4) breccia consisting of abundant highly recrystallized rock fragments as well as impact melt rock clasts. The texture, the large grain size of plagioclase, and the homogeneous compositions of olivine (similar to Fa(26)) and pyroxene (similar to Fs(22)) clearly indicate that Renchen is composed of metamorphosed rock fragments (L5-6). An L-group (and ordinary chondrite) heritage is consistent with the data on the model abundance of metal, the density, the magnetic susceptibility as well as on O-, Ti-, and Cr-isotope characteristics. Renchen does not contain solar wind implanted noble gases and is a fragmental breccia. An unusually large mm-sized merrillite-apatite aggregate shows trace element characteristics like other phosphates from ordinary chondrites.Data on the bulk chemistry, IR-spectroscopy, cosmogenic nuclides, and organic components also indicate similarities to other metamorphosed L chondrites. Noble gas studies reveal that the meteorite has a cosmic ray exposure (CRE) age of 42 Ma and that most of the cosmogenic gases were produced in a meteoroid with a radius of at max. 20 cm based on the radionuclide Al-26 and 10-150 cm based on cosmogenic Ne-22/Ne-21. K-Ar and U/Th-He gas retention ages are both in the range similar to 3.0-3.2 Ga. Both systems do not show evidence for a complete reset 470 Ma ago, and may instead have recorded the same resetting event 3.0 Ga ago.
AU  - Bischoff, A.*
AU  - Barrat, J.A.*
AU  - Berndt, J.*
AU  - Borovicka, J.*
AU  - Burkhardt, C.*
AU  - Busemann, H.*
AU  - Hakenmüller, J.*
AU  - Heinlein, D.*
AU  - Hertzog, J.
AU  - Kaiser, J.*
AU  - Maden, C.*
AU  - Meier, M.M.M.*
AU  - Morino, P.*
AU  - Pack, A.*
AU  - Patzek, M.*
AU  - Reitze, M.P.*
AU  - Rüfenacht, M.*
AU  - Schmitt-Kopplin, P.
AU  - Schönbächler, M.*
AU  - Spurný, P.*
AU  - Weber, I.*
AU  - Wimmer, K.*
AU  - Zikmund, T.*
C1  - 56777
C2  - 47396
CY  - Hackerbrucke 6, 80335 Munich, Germany
TI  - The Renchen L5-6 chondrite breccia - The first confirmed meteorite fall from Baden-Wurttemberg (Germany).
JO  - Chem. Erde-Geochem.
VL  - 79
IS  - 4
PB  - Elsevier Gmbh
PY  - 2019
SN  - 0009-2819
ER  - 

TY  - JOUR
AB  - The main mineralogical characteristics of a large light-colored clast within the Murchison CM breccia are discussed in detail including data on the mineralogy, bulk chemistry, organics, and oxygen isotopes. Petrographic study shows that the white clast consists of two areas with different granoblastic textures: (1) a coarse-grained (average grain size: similar to 200 mu m) and (2) a fine-grained lithology (average grain-size: similar to 20 mu m). The Fa-content of olivine in the clast is the same as Fa within olivine from Rumuruti (R) chondrites (Fa: similar to 38 mol%); however, the concentrations of the elements Ni and Ca in olivine are significantly different. The fragment also contains Ca-rich pyroxene, similar to An(30-38)-plagioclase/maskelynite, Cr-rich spinel, several sulfide phases, a nepheline-normative glass, and traces of merrillite and metal. The occurrence of maskelynite and nepheline-normative amorphous phase in restricted areas of the well-recrystallized rock may indicate remarkable P-T-excursions during shock metamorphism. The O-isotope composition of the clast falls below the terrestrial fractionation line (TFL), lying in the field of CM chondrites and is significantly different from data for bulk R chondrites. The study of the soluble organic matter revealed a highly-oxidized carbon chemistry and organomagnesium compounds reflecting high temperature and pressure processes.
AU  - Kerraouch, I.*
AU  - Ebert, S.*
AU  - Patzek, M.*
AU  - Bischoff, A.*
AU  - Zolensky, M.E.*
AU  - Pack, A.*
AU  - Schmitt-Kopplin, P.
AU  - Belhai, D.*
AU  - Bendaoud, A.*
AU  - Le, L.*
C1  - 56412
C2  - 47065
CY  - Hackerbrucke 6, 80335 Munich, Germany
TI  - A light, chondritic xenolith in the Murchison (CM) chondrite - Formation by fluid-assisted percolation during metasomatism?
JO  - Chem. Erde-Geochem.
VL  - 79
IS  - 4
PB  - Elsevier Gmbh
PY  - 2019
SN  - 0009-2819
ER  - 

TY  - JOUR
AB  - 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.
AU  - Bartoschewitz, R.*
AU  - Appel, P.*
AU  - Barrat, J.A.*
AU  - Bischoff, A.*
AU  - Caffee, M.W.*
AU  - Franchi, I.A.*
AU  - Gabelica, Z.*
AU  - Greenwood, R.C.*
AU  - Harir, M.
AU  - Harries, D.*
AU  - Hochleitner, R.*
AU  - Hopp, J.*
AU  - Laubenstein, M.*
AU  - Mader, B.*
AU  - Marques, R.*
AU  - Morlok, A.*
AU  - Nolze, G.*
AU  - Prudêncio, M.I.*
AU  - Rochette, P.*
AU  - Ruf, A.
AU  - Schmitt-Kopplin, P.
AU  - Seemann, E.*
AU  - Szurgot, M.*
AU  - Tagle, R.*
AU  - Wach, R.A.*
AU  - Welten, K.C.*
AU  - Weyrauch, M.*
AU  - Wimmer, K.*
C1  - 50222
C2  - 42189
CY  - Jena
SP  - 207-224
TI  - The Braunschweig meteorite - a recent L6 chondrite fall in Germany.
JO  - Chem. Erde-Geochem.
VL  - 77
IS  - 1
PB  - Elsevier Gmbh, Urban & Fischer Verlag
PY  - 2016
SN  - 0009-2819
ER  -