Details

Autor(en) / Beteiligte

• Kohout, Tomáš
• Haloda, Jakub
• Halodová, 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.

Titel

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

Ist Teil von

• Meteoritics & planetary science, 2017-08, Vol.52 (8), p.1525-1541

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc

Erscheinungsjahr

2017

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• 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.