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| Northwest Africa 14854 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14854 This is an OFFICIAL meteorite name. Abbreviation: NWA 14854 Observed fall: No Year found: 2021 Country: Algeria Mass:  488 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 79 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 9 May 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14854 (NWA 14854) Algeria Purchased: 2021 Classification: Carbonaceous chondrite (CK3) History: Adrián Contreras Gómez (CRATER Meteorites) A single sample was found by a nomad in northwest Africa at unknown coordinates. This meteorite was purchased by Adrián Contreras Gómez (CRATER Meteorites) in Tindouf, Algeria, in 2021. Physical characteristics: The sample has an ovoid shape with a brown, sand-blasted surface showing visible chondrules. The interior is brownish-green in color and shows sparse chondrules and CAIs. Petrography: Description and classification (A. Love, App) Sample is composed of well-formed chondrules (with an average diameter of 784 μm, n=35) and CAIs set in a clastic, olivine-dominant matrix (~70 vol%). Olivine in some chondrules show strong compositional zoning with Mg-rich cores and FeO-rich rims. Some chondrules are surrounded by thick concentric igneous and clastic rims. Additional minerals are: plagioclase and Cr-rich magnetite (6.8±0.82 wt.% Cr2O3, n=6). Geochemistry: (A. Love, App) Olivine (Fa23.6±13.4, Fe/Mn=157.0±47.1, NiO=0.2±0.1, n=16); low Ca pyroxene (Fs1.2Wo1.3, Fe/Mn=6.5, n=1); pigeonite (Fs2.3±1.4, Fe/Mn=7.8±5.5, n=4); high Ca pyroxene (Fs1.3±0.8Wo39.9±6.8, n=7). Classification: Carbonaceous chondrite (CK3 C-S1 wi-1) Based on Unequilibrated mineral compositions, sparse large diameter chondrules, presence of CAIs and Cr-rich magnetite, sample is a CK3. Specimens: Adrián Contreras Gómez (CRATER Meteorites) holds the main mass. 2 slices weighing 20.3 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
| Data from: MB111 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:
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Statistics: This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||