Mineralogy,chemistry, and irradiation record of Neuschwanstein (EL6) chondrite |
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| Authors: | J ZIPFEL A BISCHOFF L SCHULTZ B SPETTEL G DREIBUS T SCHÖNBECK H PALME |
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| Institution: | 1. Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Senckenberganlage 25, 60325 Frankfurt am Main, Germany;2. Institut für Planetologie, Wilhelm‐Klemm‐Strasse 10, 48149 Münster, Germany;3. Max‐Planck‐Institut für Chemie, Saarstrasse 23, 55020 Mainz, Germany;4. Institut für Mineralogie und Geochemie, Universit?t zu K?ln, Zülpicherstrasse 49b, 50674 K?ln, Germany;5. PANalytical GmbH, Nürnberger Stra?e 113, 34123 Kassel, Germany |
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| Abstract: | Abstract– We present a detailed study of mineralogy, chemistry, and noble gases of the Neuschwanstein (EL6) chondrite that fell in 2002 in southern Germany. The meteorite has an unbrecciated texture and exhibits only minor shock features. Secondary weathering products are marginal. Neuschwanstein is an EL6 chondrite with heterogeneously distributed metal and sulfide grains. In terms of bulk chemistry, it has very high Fe concentrations, and siderophile and halogen element abundances higher than typical EL chondrites. However, like other ELs of higher petrologic type, it has low moderately volatile element abundances, e.g., Mn and Zn. We interpret these as indicators for loss of sulfide, probably through mobilization of ferroan alabandite and a Zn‐bearing sulfide, potentially sphalerite, during metamorphism. Trapped noble gases are dominated by a subsolar component with high Ar concentrations and are typical for EL chondrites. The shielding parameters indicate a small meteoroid (<20 cm radius) with an exposure age of approximately 47 Ma, which is among the highest for enstatite chondrites. |
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