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Northwest Africa 13941 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13941 This is an OFFICIAL meteorite name. Abbreviation: NWA 13941 Observed fall: No Year found: 2021 Country: Algeria Mass: 1695 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 99 approved meteorites classified as LL7. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 29 May 2021 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13941 (NWA 13941) Algeria Purchased: 2021 Classification: Ordinary chondrite (LL7) History: (C. Muñecas, Expometeoritos) A batch consisting 3 pieces of various sizes was found by a nomad in a place in northwest Africa of unknown coordinates. These meteorites were eventually purchased by Carlos Muñecas from a dealer in Tindouf. Physical characteristics: Samples are coated with a dark brown, wind ablated fusion crust. A cut face shows the interior is dark orangish brown and has a brecciated texture. Petrography: Description and classification (A. Love, App) Sample is a cataclastic breccia composed of rounded to angular clasts of texturally equilibrated chondritic debris set within a comminuted matrix of similar materials. Chondrules were not observed in thin section. Average clast size is 1466 µm. Average grainsize of secondary plagioclase is 122 µm, (n=22). Sample contains (<1vol%) angular up to 460 µm clasts of K-feldspar (2V of optical figures indicates this is microcline) grains within the comminuted matrix. Sample shows abundant poikilitic textured fragments. Additional minerals are: high Ca pyroxene, albitic plagioclase, apatite, chromite and troilite. Geochemistry: (A. Love, App) Olivine (Fa31.3±0.4, Fe/Mn=63.3±2.2, n=13); low Ca pyroxene (Fs26.4±0.7Wo2.4±0.6, Fe/Mn=38.4±1.1, n=13); high Ca Pyroxene (Fs11.6±1.2Wo43.1±1.1, n=7); plagioclase (Ab81.6±2.0Or4.3±0.7, n=4); alkali feldspar (Or90.0±6.4Ab6.8±5.3, n=10). Classification: Ordinary chondrite (LL7 breccia, C-S3, W3). Equilibrated textures, grainsize of secondary plagioclase, presence of alkali feldspar and mineral compositions indicate sample is an LL7 ordinary chondrite. Specimens: C. Muñecas (Expometeoritos) holds the 1015 g main mass. A polished thin section and 3 slices weighing 24.99 g are on deposit at App. | ||||||||||||||||||||||||||||||||
Data from: MB110 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) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography: |
Statistics: This is 1 of 1344 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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