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Northwest Africa 14114
Basic information Name: Northwest Africa 14114
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14114
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 350 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 60 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 20 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14114 (NWA 14114)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CK3)

History: A total of 6 stones with very similar visual appearance were purchased in two lots by Shun-Chung Yang in April and June 2021 from a Moroccan dealer and his brother.

Physical characteristics: The stones (total weight 350 g) have coatings of caliche but the dark brown interiors are fresh.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed relatively large, glass-bearing chondrules (some with multiple rims, some containing Cr-magnetite, apparent diameter 1070±600 µm, N = 25) accompanied by irregularly shaped CAI and AOA are set in a fine grained matrix (~30 vol.%, sepia brown in thin section) containing anorthite, altered metal, Cr-magnetite (with up to 4.4 wt.% Cr2O3) and iron sulfides (with distinctly bimodal Ni contents).

Geochemistry: Olivine (Fa13.6±14.3, range Fa3.0-44.2, N = 7), low-Ca pyroxene (Fs1.0±0.5Wo1.4±1.1, range Fs0.6-1.7Wo0.5-3.1, N = 5), diopside (Fs0.6Wo40.0), anorthite (An90.4-94.9Or0.0, N = 4), magnetite (Cr2O3 1.6-4.4 wt.%, mean 2.8 wt.%; TiO2 0.1 wt.%, Al2O3 0.8-1.5 wt.%, N = 5), Ni-poor iron sulfide (Ni 0.02-0.11 wt.%, N = 4), Ni-rich iron sulfide (Ni 10.4-19.2 wt.%, N = 6).

Classification: Carbonaceous chondrite (CK3). CK group rather than CV based on the Cr2O3 content of magnetite, Torrano et al. (2020).

Specimens: 21.4 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Bibliography:
  • Torrano Z. A., Davidson J. and Wadhwa M. (2020) A reclassification of Northwest Africa 2900 from CV3 to CK3 chondrite. Meteorit. Planet. Sci. 55, 2539–2550. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):350
Pieces:6
Class:CK3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):13.6±14.3
Ferrosilite (mol%):1.0±0.5
Wollastonite (mol%):1.4±1.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):21.4
Type spec location:UWB
Main mass:S. C. Yang
Comments:Work name SCY-28; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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