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Northwest Africa 13684 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13684 This is an OFFICIAL meteorite name. Abbreviation: NWA 13684 Observed fall: No Year found: 2020 Country: Mauritania Mass: 170 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 217 approved meteorites classified as CK5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 13 Feb 2021 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13684 (NWA 13684) Mauritania Purchased: 2020 Classification: Carbonaceous chondrite (CK5) History: Carlos Muñecas purchased the 170 g sample from a dealer in Mauritania in 2020. Physical characteristics: The sample is ovoid and has a dark brown-black exterior with protruding chondrules. The interior is dark brown and contains dispersed chondrules. Petrography: Description and classification (A. Love, App) Sample has a chondritic texture composed of dispersed chondrules, fragments and magnetite. Average apparent diameter of chondrules is 636µm, n=51. Additional minerals are: magnetite, chromite, ilmenite, phosphates, pentlandite, FeS. Geochemistry: Olivine (Fa33.4±0.7, Fe/Mn=111.4±7.7, NiO=0.4±0.1, n=20); low Ca pyroxene (Fs27.6±0.6Wo2.7±1.9, Fe/Mn=71.6±3.6, n=5); high Ca pyroxene (Fs15.3±1.5Wo49.1±0.7, n=4), plagioclase (An51.4±9.6Or1.8±0.7, n=5). Cr2O3 Wt% in magnetite=3.1±1.3. Classification: Carbonaceous chondrite (CK5, wi-3). Based on chondrule diameters, equilibrated mineral compositions, plagioclase composition, Cr-bearing magnetite and Ni-bearing olivine (Torrano et al., 2020) , this sample is a CK5. Specimens: Carlos Muñecas holds the main mass. An endcut and 2 slices weighing 20.91 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
Bibliography: |
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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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Photos: |
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Geography: |
Statistics: This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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