Annama H chondrite - mineralogy, physical properties, cosmic ray exposure, and parent body history
| Autor: | Carles E. Moyano-Cambero, Matthias M. M. Meier, Jarmo Moilanen, V. I. Grokhovsky, Henner Busemann, Maksim S. Karabanalov, Evgeniia V. Brusnitsyna, Esko Lyytinen, Matthias Laubenstein, Grigoriy A. Yakovlev, Maria Gritsevich, Kees C. Welten, E. V. Petrova, Sekhar Naik, Josep M. Trigo-Rodríguez, N. A. Kruglikov, Jakub Haloda, M. I. Oshtrakh, Vladimir A. Semionkin, A. V. Ishchenko, Mario Trieloff, Tomas Kohout, Marc W. Caffee, Colin Maden, R. R. Mahajan, Patricie Halodova, Israel Felner, Jens Hopp, A.A. Maksimova, Andrey V. Chukin |
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| Přispěvatelé: | Department of Physics |
| Rok vydání: | 2017 |
| Předmět: |
1171 Geosciences
MOSSBAUER-SPECTROSCOPY Mineralogy FOS: Physical sciences Cosmic ray 010502 geochemistry & geophysics 114 Physical sciences 01 natural sciences physical properties Parent body Chondrite 0103 physical sciences Cosmogenic nuclide 010303 astronomy & astrophysics Annama 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Radionuclide asteroid COSMOGENIC NUCLIDES Noble gas Radius 115 Astronomy Space science cohndrite Geophysics Meteorite 13. Climate action Space and Planetary Science COSMIC-RAY EXPOSURE Geology Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Meteoritics & Planetary Science, 52 (8) Meteoritics & Planetary Science Meteorit. Planet. Sci. Meteoritics and Planetary Science |
| DOI: | 10.48550/arxiv.1710.07687 |
| Popis: | The fall of the Annama meteorite occurred early morning (local time) on April 19, 2014 on the Kola Peninsula (Russia). Based on mineralogy and physical properties, Annama is a typical H chondrite. It has a high Ar-Ar age of 4.4 Ga. Its cosmic ray exposure history is atypical as it is not part of the large group of H chondrites with a prominent 7–8 Ma peak in the exposure age histograms. Instead, its exposure age is within uncertainty of a smaller peak at 30 ± 4 Ma. The results from short-lived radionuclides are compatible with an atmospheric pre-entry radius of 30–40 cm. However, based on noble gas and cosmogenic radionuclide data, Annama must have been part of a larger body (radius >65 cm) for a large part of its cosmic ray exposure history. The 10Be concentration indicates a recent (3–5 Ma) breakup which may be responsible for the Annama parent body size reduction to 30–35 cm pre-entry radius. © The Meteoritical Society, 2017. |
| Databáze: | OpenAIRE |
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