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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 75 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 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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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