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Northwest Africa 13329
Basic information Name: Northwest Africa 13329
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13329
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 360 g
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 3 Jul 2020
Writeup from MB 109:

Northwest Africa 13329 (NWA 13329)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Mark Lyon in January 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Relatively small, well-formed chondrules (apparent diameter 300 ± 220 µm, N = 24) plus sparse mineral fragments and very fine grained AOA are set in a fine grained matrix (~25 vol.%, red-brown in thin section) containing accessory altered kamacite and troilite. No CAI were observed.

Geochemistry: Olivine (Fa34.5±30.8, range Fa1.6-78.3, N = 8; Cr2O3 in ferroan rims 0.04-0.40 wt.%, N = 5), low-Ca pyroxene (Fs0.7Wo0.8; Fs25.6Wo1.7; N = 2), pigeonite (Fs1.5Wo5.1; 13.4Wo5.4; Fs5.8Wo12.4; N = 3), subcalcic augite (Fs1.2±0.7Wo37.3±1.6, range Fs0.7-1.7Wo36.2-38.4, N = 2), plagioclase (An95.9Or0.1).

Classification: Carbonaceous chondrite (CO3).

Specimens: 24.5 g including one polished thin section at UWB; remainder with Mr. M. Lyon.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Jan
Mass (g):360
Shock stage:S2
Weathering grade:low
Fayalite (mol%):34.5±30.8
Ferrosilite (mol%):0.7; 25.6
Wollastonite (mol%):0.8; 1.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.5
Type spec location:UWB
Main mass:M. Lyon
Comments:Work name Lyon20-3; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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