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Northwest Africa 12836 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12836 This is an OFFICIAL meteorite name. Abbreviation: NWA 12836 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 319 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2 approved meteorites classified as CK4-6. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 11 Oct 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12836 (NWA 12836) (Northwest Africa) Purchased: 2019 May Classification: CK4-6 History: Purchased by Beat Booz in May 2019 from a Moroccan dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of angular clasts and isolated equilibrated chondrules set within a finer grained stained matrix containing Cr-magnetite and pyrrhotite. Clasts are devoid of recognizable chondrules and are metamorphic-textured aggregates composed primarily of olivine, augite, intermediate plagioclase, Cr-magnetite, pentlandite and chlorapatite. Geochemistry: Discrete chondrules: olivine (Fa32.5±0.7 (range Fa31.5-33.3), N = 7; one magnesian core Fa21.0), pigeonite (Fs21.2Wo11.2), subcalcic augite (Fs12.3Wo30.4). Type 6 clasts: olivine (Fa33.4±0.2 (range Fa33.2-33.6), N = 2), augite (Fs15.3Wo45.3), plagioclase (An69.3Or0.5). Classification: Carbonaceous chondrite (CK4-6 breccia). Specimens: 20.1 g including one polished thin section and one polished mount at UWB; remainder with Mr. B. Booz. | ||||||||||||||||||||||||||||||
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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Photos: |
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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