Park Forest (L5) and the asteroidal source of shocked L chondrites
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Park Forest (L5) and the asteroidal source of shocked L chondrites
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| Автор |
Meier, M. M. M.
Welten, K. C. Riebe, M. E. I. Caffee, M. W. Gritsevich, M. Maden, C. Busemann, H. |
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| Описание |
The Park Forest (L5) meteorite fell in a suburb of Chicago, Illinois (USA) on March 26, 2003. It is one of the currently 25 meteorites for which photographic documentation of the fireball enabled the reconstruction of the meteoroid orbit. The combination of orbits with pre-atmospheric sizes, cosmic-ray exposure (CRE), and radiogenic gas retention ages (“cosmic histories”) is significant because they can be used to constrain the meteoroid's “birth region,” and test models of meteoroid delivery. Using He, Ne, Ar, 10Be, and 26Al, as well as a dynamical model, we show that the Park Forest meteoroid had a pre-atmospheric size close to 180 g cm−2, 0–40% porosity, and a pre-atmospheric mass range of ~2–6 tons. It has a CRE age of 14 ± 2 Ma, and (U, Th)-He and K-Ar ages of 430 ± 90 and 490 ± 70 Ma, respectively. Of the meteorites with photographic orbits, Park Forest is the second (after Novato) that was shocked during the L chondrite parent body (LCPB) break-up event approximately 470 Ma ago. The suggested association of this event with the formation of the Gefion family of asteroids has recently been challenged and we suggest the Ino family as a potential alternative source for the shocked L chondrites. The location of the LCPB break-up event close to the 5:2 resonance also allows us to put some constraints on the possible orbital migration paths of the Park Forest meteoroid. © The Meteoritical Society, 2017.
Florida Museum of Natural History, FLMNH; European Research Council, ERC: 320773; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF; Academy of Finland, AKA: 260027; Russian Science Foundation, RSF: 14-22-00197; Government Council on Grants, Russian Federation This article has been greatly improved by reviews by Keisuke Nagao; Vera Assis Fernandes; and the Associate Editor, Ingo Leya. We thank the Field Museum of Natural History (Philipp R. Heck) for providing the samples; David Nesvorný for his Gefion fragment data; Rainer Wieler, Simon Grimm, Peter Brown, and Esko Lyytinen for quick feedback and valuable discussions. This study was supported by the Swiss National Science Foundationa (SNSF Ambizione grant to MM). MG acknowledges support from the Academy of Finland, project No 260027; the ERC Advanced Grant No. 320773; and the Russian Science Foundation, project No. 14-22-00197. Research at the Ural Federal University is supported by the Act 211 of the Government of the Russian Federation, agreement No 02.A03.21.0006. All authors declare no conflict of interest. |
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| Дата |
2024-04-17T17:43:23Z
2024-04-17T17:43:23Z 2017 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Meier, M. M. M., Welten, K. C., Riebe, M. E. I., Caffee, M. W., Gritsevich, M., Maden, C., & Busemann, H. (2017). Park Forest (L5) and the asteroidal source of shocked L chondrites. Meteoritics & Planetary Science, 52(8), 1561-1576. https://doi.org/10.1111/maps.12874
1086-9379 Final All Open Access, Bronze https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/maps.12874 http://elar.urfu.ru/handle/10995/132121 10.1111/maps.12874 85018600345 000406869300003 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
University of Arkansas
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| Источник |
Meteoritics & Planetary Science
Meteoritics and Planetary Science |
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