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Northwest Africa 14489
Basic information Name: Northwest Africa 14489
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14489
Observed fall: No
Year found: 2021
Country: Mali
Mass:help 2.1 kg
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 20 Dec 2021
Writeup from MB 110:

Northwest Africa 14489 (NWA 14489)


Purchased: 2021 Jun

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Craig Zlimen in June 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Small well-formed chondrules (apparent diameter 180±80 µm, N = 24), angular olivine grains and very fine grained CAI are set in a fine grained matrix (~40 vol. %, deep reddish-brown in thin section) containing troilite, kamacite, plagioclase and taenite. Minerals in CAI include Al-Ti-diopside, gehlenite, V-bearing spinel, perovskite, hibonite and ilmenite (associated with perovskite).

Geochemistry: Olivine (Fa32.7±24.8, range Fa0.9-64.1, N = 5; Cr2O3 in ferroan olivine 0.06-0.21 wt.%, mean 0.14±0.06 wt%, N = 6), matrix olivine (Fa83.0), low-Ca pyroxene (Fs2.7±1.0Wo2.0±2.4, range Fs1.6-3.5Wo0.6-4.8, N = 3), pigeonite (Fs25.7Wo6.7), subcalcic augite (Fs19.1Wo36.0), Al-Ti-diopside (Fs2.8Wo40.1, Al2O3 8.3 wt.%, TiO2 1.2 wt.%), plagioclase (An40.1Or0.0; An82.7Or0.0; N = 2).

Classification: Carbonaceous chondrite (CO3).

Specimens: 29.2 g including one polished thin section at UWB; remainder with Mr. C. Zlimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jun
Mass (g):2100
Shock stage:S2
Weathering grade:low
Fayalite (mol%):32.7±24.8
Ferrosilite (mol%):2.7±1.0
Wollastonite (mol%):2.0±2.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):29.2
Type spec location:UWB
Main mass:C. Zlimen
Comments:Work name CAZ048; 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. 110, in preparation (2021)
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     This is 1 of 74 approved meteorites from Mali (plus 1 unapproved name)

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