Meteoritical Bulletin: Entry for Northwest Africa 14489

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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: 2.1 kg

Classification
history:

Recommended:

CO3 [explanation]

This is 1 of 642 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

help

Writeup from MB 110:

Northwest Africa 14489 (NWA 14489)

Mali

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 (Fa_32.7±24.8, range Fa_0.9-64.1, N = 5; Cr₂O₃ in ferroan olivine 0.06-0.21 wt.%, mean 0.14±0.06 wt%, N = 6), matrix olivine (Fa_83.0), low-Ca pyroxene (Fs_2.7±1.0Wo_2.0±2.4, range Fs_1.6-3.5Wo_0.6-4.8, N = 3), pigeonite (Fs_25.7Wo_6.7), subcalcic augite (Fs_19.1Wo_36.0), Al-Ti-diopside (Fs_2.8Wo_40.1, Al₂O₃ 8.3 wt.%, TiO₂ 1.2 wt.%), plagioclase (An_40.1Or_0.0; An_82.7Or_0.0; N = 2).

Classification: Carbonaceous chondrite (CO3).

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

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 Jun
Mass (g):	2100
Pieces:	many
Class:	CO3
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

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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

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

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Geography:

Mali

Mali

Coordinates:

Unknown.

Statistics:
This is 1 of 104 approved meteorites from Mali (plus 2 unapproved names)

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