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Northwest Africa 12946 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12946 This is an OFFICIAL meteorite name. Abbreviation: NWA 12946 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 2.92 kg | ||||||||||||||||||||||||||||
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 7 Nov 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12946 (NWA 12946) (Northwest Africa) Purchased: 2019 Feb Classification: HED achondrite (Eucrite, monomict) History: Purchased by Darryl Pitt in February 2019 from a Mauritanian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia consisting of eucrite clasts with intersertal texture plus related crystalline debris in a sparse matrix. Minerals are exsolved pigeonite and calcic plagioclase together with accessory silica polymorph, ilmenite, Ti-chromite, troilite and rare Ca phosphate. Geochemistry: Low-Ca pyroxene (Fs61.2-62.2Wo2.4-2.2, FeO/MnO = 31-33, N = 4), high-Ca pyroxene (Fs26.8-28.1Wo44.1-42.5, FeO/MnO = 31-34, N = 4), plagioclase (An89.3-89.7Or0.4, N = 2). Classification: Eucrite (monomict breccia). Specimens: 20.5 g including one polished thin section at UWB; remainder with DPitt. | ||||||||||||||||||||||||||||
Data from: MB108 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) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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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 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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