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Northwest Africa 11224 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11224 This is an OFFICIAL meteorite name. Abbreviation: NWA 11224 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 817 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 82 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||
Comments: | Approved 10 May 2017 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11224 (NWA 11224) (Northwest Africa) Purchased: 2016 Classification: Carbonaceous chondrite (CK3) History: 1 stone weighing 816.7 g was found in Morocco prior to 2016. J. Donald Cline and John Sinclair acquired the sample from a meteorite dealer at the Tucson Gem and Mineral Show in February 2016. Physical characteristics: Windowed sample has an ovoid shape with a few shallow regmaglypts. Sample is covered (~7%) by a lightly weathered, orange to dark-black, flow-lined fusion crust which contains contraction cracks. Small cracks in the fusion crust show the sample is dark-green in the interior. Cut face shows a dark-green interior with dark-gray chondrules, dark-green clasts, and metallic gray grains. Petrography: Description and classification (A. Love, App): Sample has a chondritic texture composed of ~60 vol%, well-formed chondrules (with an average diameter of 1059 μm, n=28) and CAIs in a fine-grained matrix dominated by olivine and plagioclase and Cr-magnetite. Olivines within matrix and chondrules show strong compositional zoning with Mg-rich cores and FeO-rich rims. Many chondrules are surrounded by thick concentric igneous and clastic rims. Geochemistry: (A. Love, App) Fa23.8±11.6 (Fa1.2-35.7), N=24; low Ca pyroxene Fs3.1Wo0.5, N=1; Ca pyroxene Fs1.6Wo38.0, N=1. Classification: Carbonaceous chondrite (CK3). Texture and mineral compositions indicate sample is a CK3 Specimens: PARI holds the 778.32 g main mass. A 24.95 g type specimen and one polished thin section are on deposit at App. | ||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016) |
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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 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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