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Northwest Africa 12457 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12457 This is an OFFICIAL meteorite name. Abbreviation: NWA 12457 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: 314 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 848 approved meteorites (plus 2 unapproved names) classified as L3. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 27 Mar 2019 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12457 (NWA 12457) (Northwest Africa) Purchased: 2005 Classification: Ordinary chondrite (L3) History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by the Hollis Collection and then donated to PSF. Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules (apparent diameter 700±310 µm, N = 22) are set in a finer matrix containing stained metal and merrillite. Several small L6 clasts were observed in the studied thin section. Geochemistry: Olivine (Fa0.8-25.1, Cr2O3 in ferroan examples 0.03-0.05 wt.%, N = 7), orthopyroxene (Fs3.2-18.1Wo0.2-0.3, N = 3), subcalcic augite (Fs12.2Wo27.3), augite (Fs6.5-7.2Wo41.0-46.2, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.85. Classification: Ordinary chondrite (L3). Specimens: The entire specimen including one polished thin section is at PSF. | ||||||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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