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Northwest Africa 11251 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11251 This is an OFFICIAL meteorite name. Abbreviation: NWA 11251 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 266 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 9 Jun 2017 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11251 (NWA 11251) (Northwest Africa) Purchased: 2016 Jan Classification: Martian meteorite (Shergottite) History: Purchased by Adam Aaronson in Temara, Morocco in January 2016. Physical characteristics: A single stone (266 g) almost completely covered by black fusion crust. The fresh interior has an overall yellowish-green color. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Aphyric, medium-grained microgabbroic texture. Minerals are olivine, zoned pyroxene (pigeonite + augite), maskelynite, ilmenite, Ti-bearing chromite, pyrrhotite, Na-Mg-Fe-bearing merrillite and chlorapatite. Geochemistry: (P. Carpenter, WUSL; S. Kuehner, UWS) Olivine (Fa46.5-47.4; FeO/MnO = 50-54, N = 3), pigeonite (Fs27.0-35.8Wo5.9-10.2, FeO/MnO = 30-34, N = 5), subcalcic augite (Fs21.8Wo32.6, FeO/MnO = 33), augite (Fs20.4Wo37.5, FeO/MnO = 30), maskelynite (An52.1-52.6Or2.1, N = 2). Classification: Martian (shergottite, microgabbroic, olivine-bearing). This mafic aphyric shergottite is unusual in containing significant amounts of olivine. Specimens: 20.2 g including one polished thin section at UWB; remainder with Aaronson. | ||||||||||||||||||||||||||||||
Data from: MB106 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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