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Northwest Africa 13224
Basic information Name: Northwest Africa 13224
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13224
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 131 g
Recommended:  LL6    [explanation]

This is 1 of 2843 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Feb 2020
Writeup from MB 109:

Northwest Africa 13224 (NWA 13224)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Ordinary chondrite (LL6)

History: Purchased by Grant Harkness in October 2019 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed of angular clasts in a finer grained matrix. The clasts are mostly recrystallized but contain some remnant chondrules and partial chondrules along with accessory sodic plagioclase, troilite, chromite and minor stained metal.

Geochemistry: Olivine (Fa29.5±0.5, range Fa29.1-30.2, N = 5), low-Ca pyroxene (Fs24.2±0.4Wo1.8±0.0, range Fs23.6-24.6Wo1.8-1.9, N = 5).

Classification: Ordinary chondrite (LL6 breccia).

Specimens: 56.6 g including one polished thin section at PSF; remainder in the Harkness Collection.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2019 Oct
Mass (g):131
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):29.5±0.5
Ferrosilite (mol%):24.2±0.4
Wollastonite (mol%):1.8±0.0
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):56.6
Type spec location:PSF
Main mass:Harkness Collection
Comments:Work name HC9; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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