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Northwest Africa 14294
Basic information Name: Northwest Africa 14294
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14294
Observed fall: No
Year found: 2019
Country: Niger
Mass:help 1889 g
Recommended:  CO3    [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14294 (NWA 14294)


Purchased: 2019 Sep

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Jesper Grønne in September 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Small well-formed chondrules (apparent diameter 200 ± 110 µm, N = 23), zoned mineral grains and fine grained CAI are set in a fine grained matrix (~40 vol.%, opaque in thin section) containing kamacite, taenite and troilite. Phases identified in CAI include gehlenite, aluminous diopside, spinel, perovskite, hercynite and minor gypsum.

Geochemistry: Olivine (Fa30.5±37.2, range Fa1.0-79.2, N = 5; Cr2O3 in ferroan olivine 0.13-0.73 wt.%, mean 0.33 wt.%, sd 0.28 wt.%, N = 4), low-Ca pyroxene (Fs3.4±2.6Wo3.1±1.9, range Fs0.5-5.9Wo0.8-5.1, N = 5), subcalcic augite (Fs1.1Wo36.8), Al-Ti-augite (Fs25.9Wo39.2, Al2O3 4.1 wt.%, TiO2 1.1 wt.%), plagioclase (An53.3Or0.1; An91.4Or0.0; N = 2).

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. J. Grønne.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Sep
Mass (g):1889
Shock stage:S2
Weathering grade:low
Fayalite (mol%):30.5±37.2
Ferrosilite (mol%):3.4±2.6
Wollastonite (mol%):3.1±1.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:J. Grønne
Comments:Work name JG-026; submitted by A. Irving
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 100 approved meteorites from Niger (plus 5 unapproved names)

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