The anomalous polymict ordinary chondrite breccia of Elmshorn (H3-6)—Late reaccretion after collision between two ordinary chondrite parent bodies, complete disruption, and mixing possibly about 2.8 Gyr ago

Author(s)

Addi Bischoff, Markus Patzek, Romain M.L. Alosius, Jean Alix Barrat, Jasper Berndt, Henner Busemann, Detlev Degering, Tommaso Di Rocco, Mattias Ek, Jérôme Gattacceca, Jose R.A. Godinho, Dieter Heinlein, Daniela Krietsch, Colin Maden, Oscar Marchhart, Martin Martschini, Silke Merchel, Andreas Pack, Stefan Peters, Miriam Rüfenacht, Jochen Schlüter, Maria Schönbächler, Aleksandra Stojic, Jakob Storz, Wolfgang Tillmann, Alexander Wieser, Karl Wimmer, Reiner Zielke

Abstract

Elmshorn fell April 25, 2023, about 30 km northwest of the city of Hamburg (Germany). Shortly after the fall, 21 pieces were recovered totaling a mass of 4277 g. Elmshorn is a polymict and anomalous H3-6 chondritic, fragmental breccia. The rock is a mixture of typical H chondrite lithologies and clasts of intermediate H/L (or L, based on magnetic properties) chondrite origin. In some of the 21 pieces, the H chondrite lithologies dominate, while in others the H/L (or L) chondrite components are prevalent. The H/L chondrite assignment of these components is based on the mean composition of their olivines in equilibrated type 4 fragments (~Fa21–22). The physical properties like density (3.34 g cm−3) and magnetic susceptibility (logχ

Organisation(s)

Isotope Physics

External organisation(s)

Universität Münster, Eidgenössische Technische Hochschule Zürich, Institut universitaire européen de la mer, Institut Universitaire de France, Paris 75005, France., Helmholtz-Zentrum Dresden-Rossendorf, Georg-August-Universität Göttingen, CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, German Fireball Network, Leibniz Institute for the Analysis of Biodiversity Change, RIF Institut für Forschung und Transfer e.V., Vogtsstr. 3

Journal

Meteoritics and Planetary Science

Volume

59

Pages

2321-2356

No. of pages

36

ISSN

1086-9379

DOI

https://doi.org/10.1111/maps.14193

Publication date

05-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

105105 Geochemistry, 103014 Nuclear physics

ASJC Scopus subject areas

Geophysics, Space and Planetary Science

Portal url

https://ucrisportal.univie.ac.at/en/publications/29729b5b-9f1f-42ed-b3d1-2fa7750f601d