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Northwest Africa 12521 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12521 This is an OFFICIAL meteorite name. Abbreviation: NWA 12521 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 220 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 17 approved meteorites classified as L3.1. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12521 (NWA 12521) (Northwest Africa) Purchased: 2018 Nov Classification: Ordinary chondrite (L3.1) History: Purchased by Ben Hoefnagels in November 2018 from a dealer in Agadir, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed of well-formed chondrules (apparent diameter 860±430 µm, N = 24, excluding one large 5 mm chondrule in the studied thin section) plus some angular Type 3 lithic clasts (up to 1.6 mm across) set in a fine grained, metal-bearing matrix (~10 vol.%, black in thin section). Geochemistry: Olivine Fa17.2±12.3 (n=8, randomly selected), range Fa1.7-59.4. Cr2O3 in ferroan examples 0.03-1.30 wt.%, mean 0.22±0.24 wt.%, N = 30), orthopyroxene (Fs1.5-33.2Wo0.3-1.0, N = 3), pigeonite (Fs26.8Wo14.9), augite (Fs17.1Wo35.8). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.64. Classification: Ordinary chondrite (L3.1). Based on lack of equilibration of mafic silicates, chondrule sizes and magnetic susceptibility this specimen is an L3 chondrite, and the distribution of Cr in ferroan olivines is consistent with an L3.1 chondrite (similar to Adrar 003, as documented by Grossman and Brearley, 2005). Specimens: 20.2 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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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 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
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