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Northwest Africa 13356
Basic information Name: Northwest Africa 13356
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13356
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 396 g
Recommended:  LL4    [explanation]

This is 1 of 387 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 4 Jul 2020
Writeup from MB 109:

Northwest Africa 13356 (NWA 13356)

(Northwest Africa)

Purchased: 2019 Aug

Classification: Ordinary chondrite (LL4)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules with a wide range in size (apparent diameter 0.1-3.5 mm) are set in a finer grained matrix containing goethite (after kamacite), chromite and troilite.

Geochemistry: Olivine (Fa28.6±0.3, range Fa28.3-28.9, N = 5), low-Ca pyroxene (Fs23.2±0.5Wo2.5±0.2, range Fs22.3-23.7Wo1.5-4.5, N = 6), augite (Fs8.8±0.5Wo46.4±0.1, range Fs8.4-9.1Wo46.3-46.5, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.24.

Classification: Ordinary chondrite (LL4).

Specimens: 28.6 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 Aug
Mass (g):396
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):28.6±0.3
Ferrosilite (mol%):23.2±0.5
Wollastonite (mol%):2.5±1.2
Magnetic suscept.:3.24
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):28.6
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 256; 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 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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