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Northwest Africa 14490 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 14490 This is an OFFICIAL meteorite name. Abbreviation: NWA 14490 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 223 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 487 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 23 Nov 2021 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 14490 (NWA 14490) (Northwest Africa) Purchased: 2021 Jul Classification: Ordinary chondrite (LL3) History: Purchased by Shun-Chung Yang in July 2021 from a dealer in Tindouf, Algeria. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed chondrules (apparent diameter 940±570 µm, N = 25) are set in a fine grained matrix (~15 vol.%, red-brown in thin section) containing extensively altered kamacite, troilite and chromite, plus some secondary barite and calcite. Geochemistry: Olivine (Fa22.5±11.2, range Fa3.0-40.8, N = 11; Cr2O3 in ferroan olivine 0.03-0.12 wt.%, mean 0.07±0.03 wt.%, N = 10), low-Ca pyroxene (Fs20.9±13.9Wo1.0±0.8, range Fs2.0-34.8Wo0.34-2.3, N = 5), pigeonite (Fs6.1Wo10.6). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.33. Classification: Ordinary chondrite (LL3). Specimens: 21 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang. | ||||||||||||||||||||||||||||||||
Data from: MB110 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) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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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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