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Northwest Africa 11953 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11953 This is an OFFICIAL meteorite name. Abbreviation: NWA 11953 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 1160 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 276 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 15 Sep 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11953 (NWA 11953) (Northwest Africa) Purchased: 2018 Feb Classification: HED achondrite (Eucrite, monomict) History: Purchased by Jason Phillips in February 2018 from a Moroccan dealer. Petrography: (A. Irving and S. Kuehner, UWS) Highly shocked and partially melted breccia. Gabbroic-textured clasts (some up to 3 cm across) and related disaggregated debris consist mainly of extremely fine scale polycrystalline aggregates after primary pigeonite (with some exsolution lamellae still preserved) and polycrystalline, microvesicular calcic plagioclase (exhibiting "swirly" microtexture indicative of being previously molten). Accessory minerals are silica polymorph, ilmenite, Ti-chromite, Ti-poor chromite, troilite and minor secondary barite and calcite. Geochemistry: Orthopyroxene host (Fs57.9-60.6Wo4.0-2.1, FeO/MnO = 31-34, N = 3), clinopyroxene exsolution lamellae (Fs26.9-27.3Wo41.8-42.6, FeO/MnO = 30-31, N = 2), plagioclase (An89.2-90.4Or0.9-0.4, N = 2). Classification: Eucrite (monomict breccia, gabbroic, shock melted). Specimens: 46.5 g including one polished thin section at UWB; remainder with Mr. J. Phillips. | ||||||||||||||||||||||||||||
Data from: MB107 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. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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