Annama H chondrite-Mineralogy, physical properties, cosmic ray exposure, and parent body history

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Kohout , T , Haloda , J , Halodova , P , Meier , M M M , Maden , C , Busemann , H , Laubenstein , M , Caffee , M W , Welten , K C , Hopp , J , Trieloff , M , Mahajan , R R , Naik , S , Trigo-Rodriguez , J M , Moyano-Cambero , C E , Oshtrakh , M I , Maksimova , A A , Chukin , A V , Semionkin , V A , Karabanalov , M S , Felner , I , Petrova , E V , Brusnitsyna , E V , Grokhovsky , V I , Yakovlev , G A , Gritsevich , M , Lyytinen , E , Moilanen , J , Kruglikov , N A & Ishchenko , A V 2017 , ' Annama H chondrite-Mineralogy, physical properties, cosmic ray exposure, and parent body history ' , Meteoritics and Planetary Science , vol. 52 , no. 8 , pp. 1525-1541 . https://doi.org/10.1111/maps.12871

Title: Annama H chondrite-Mineralogy, physical properties, cosmic ray exposure, and parent body history
Author: Kohout, Tomas; Haloda, Jakub; Halodova, Patricie; Meier, Matthias M. M.; Maden, Colin; Busemann, Henner; Laubenstein, Matthias; Caffee, Marc. W.; Welten, Kees C.; Hopp, Jens; Trieloff, Mario; Mahajan, Ramakant R.; Naik, Sekhar; Trigo-Rodriguez, Josep M.; Moyano-Cambero, Carles E.; Oshtrakh, Michael I.; Maksimova, Alevtina A.; Chukin, Andrey V.; Semionkin, Vladimir A.; Karabanalov, Maksim S.; Felner, Israel; Petrova, Evgeniya V.; Brusnitsyna, Evgeniia V.; Grokhovsky, Victor I.; Yakovlev, Grigoriy A.; Gritsevich, Maria; Lyytinen, Esko; Moilanen, Jarmo; Kruglikov, Nikolai A.; Ishchenko, Aleksey V.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2017-08
Language: eng
Number of pages: 17
Belongs to series: Meteoritics and Planetary Science
ISSN: 1086-9379
URI: http://hdl.handle.net/10138/234157
Abstract: 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 Be-10 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.
Subject: Annama
cohndrite
COSMIC-RAY EXPOSURE
asteroid
physical properties
MOSSBAUER-SPECTROSCOPY
COSMOGENIC NUCLIDES
115 Astronomy, Space science
114 Physical sciences
1171 Geosciences
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