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Northwest Africa 12838 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12838 This is an OFFICIAL meteorite name. Abbreviation: NWA 12838 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 58.3 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 11 Oct 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12838 (NWA 12838) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Eucrite, monomict) History: Purchased by Mbark Arjdal from an Algerian dealer in 2018. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia consisting of closely-packed eucrite clasts (exhibiting partly recrystallized subophitic texture) plus sparse related crystalline debris. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, Ti chromite, troilite, rare zircon and minor secondary calcite. Geochemistry: Orthopyroxene (Fs59.9-60.2Wo3.7-3.0, FeO/MnO = 33-34, N = 2), clinopyroxene (Fs28.8-31.9Wo42.1-38.5, FeO/MnO = 31-32, N = 2), plagioclase (An83.6-84.2Or0.6, N = 2). Classification: Eucrite (monomict breccia). Specimens: 12.6 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. | ||||||||||||||||||||||||||||
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) |
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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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