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Northwest Africa 13326
Basic information Name: Northwest Africa 13326
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13326
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1235 g
Recommended:  LL3    [explanation]

This is 1 of 451 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 31 May 2020
Writeup from MB 109:

Northwest Africa 13326 (NWA 13326)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Ordinary chondrite (LL3)

History: Purchased by Mbark Arjdal in November 2019 from a dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely packed, well-formed chondrules (apparent diameter 970±530 µm, N = 25) are set within a sparse, relatively unaltered fine grained matrix containing accessory kamacite, taenite, chromite and troilite. A 1.1 cm long olivine-phyric igneous clast containing subhedral to euhedral olivine phenocrysts in a very fine grained groundmass is present in the studied thin section.

Geochemistry: Olivine (Fa27.0±11.3, range Fa3.1-38.2, N = 11; Cr2O3 in ferroan rims 0.03-0.06 wt.%, N = 4), low-Ca pyroxene (Fs16.5±8.1Wo1.2±0.9, range Fs1.4-23.6Wo0.3-2.4, N = 7), pigeonite (Fs40.7Wo5.3; Fs44.7Wo10.5; N = 2), augite (Fs9.9Wo36.3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.39.

Classification: Ordinary chondrite (LL3).

Specimens: 39.6 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2019 Nov
Mass (g):1235
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):27.0±11.3
Ferrosilite (mol%):16.5±8.1
Wollastonite (mol%):1.2±0.9
Magnetic suscept.:4.39
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):39.6
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 270; 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. 109, in preparation (2020)
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     This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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