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Northwest Africa 14854
Basic information Name: Northwest Africa 14854
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14854
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 488 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 69 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
Writeuphelp
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:
Place of purchase:Tindouf
Date:P 2021
Mass (g):488
Pieces:1
Class:CK3
Shock stage:C-S1
Weathering grade:wi-1
Fayalite (mol%):23.6±13.4
Ferrosilite (mol%):1.2; 1.3±0.8
Wollastonite (mol%):1.3; 39.9±6.8
Classifier:A. Love, App
Type spec mass (g):20.3
Type spec location:App
Main mass:Adrián Contreras Gómez (CRATER Meteorites)
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1190 approved meteorites from Algeria (plus 28 unapproved names) (plus 4 impact craters)

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