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Northwest Africa 12213 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12213 This is an OFFICIAL meteorite name. Abbreviation: NWA 12213 Observed fall: No Year found: 2018 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2 approved meteorites classified as LL(L)3.2. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 5 Jan 2019 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12213 (NWA 12213) Algeria Purchased: 2018 May Classification: Ordinary chondrite (LL(L)3.2) History: Purportedly found in Algeria and purchased by Ben Hoefnagels in May 2018 from a dealer in Guelmim, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Closely packed, well-formed chondrules (apparent diameter 700±390 µm, N = 20) are set in a finer grained matrix containing altered metal. Geochemistry: Olivine (Fa1.2-79.3, Cr2O3 in ferroan examples 0.05-0.46 wt.%, mean 0.16±0.10 wt.%, N = 32), orthopyroxene (Fs2.8-19.9Wo0.4-1.3, N = 4),pigeonite (Fs17.8Wo7.3), subcalcic augite (Fs4.2Wo36.4). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.57. Classification: Ordinary chondrite LL(L)3.2. Subtype based on the observed range in Fa content of olivine and the range and mean of Cr2O3 contents in ferroan olivines, which are very similar to the results for Krymka (Grossman and Brearley, 2005). Specimens: 30.5 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels. | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography:![]() |
Statistics: This is 1 of 1059 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters) |