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Northwest Africa 13331 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13331 This is an OFFICIAL meteorite name. Abbreviation: NWA 13331 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 25 approved meteorites classified as H7. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 3 Jul 2020 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13331 (NWA 13331) (Northwest Africa) Purchased: 2020 Jan Classification: Ordinary chondrite (H7) History: Purchased by Rachid Chaoui in January 2020 from a Mauritanian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen exhibits triple grain junction texture completely lacking any evidence of former chondrules, and is composed predominantly of olivine and low-Ca pyroxene with accessory augite, sodic plagioclase, altered kamacite, merrillite, taenite, troilite and chromite. Geochemistry: Olivine (Fa16.3±0.1, range Fa16.2-16.5, N = 11), low-Ca pyroxene (Fs14.4±0.2Wo2.3±0.8, range Fs14.2-14.7Wo1.2-3.7, N = 11), augite (Fs5.5±0.3Wo45.3±0.4, range Fs5.0-5.7Wo44.9-45.9, N = 6). Magnetic susceptibility log χ = 5.20. Classification: Ordinary chondrite (H7). Specimens: 27 g including one polished thin section at UWB; remainder with Z. Wang. | ||||||||||||||||||||||||||||||
Data from: MB109 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) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) 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. 109, in preparation (2020)
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Photos: |
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Geography: |
Statistics: This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names) |