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Northwest Africa 13333
Basic information Name: Northwest Africa 13333
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13333
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 957 g
Recommended:  LL3    [explanation]

This is 1 of 462 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 13 Jun 2020
Writeup from MB 109:

Northwest Africa 13333 (NWA 13333)


Purchased: 2019

Classification: Ordinary chondrite (LL3)

History: Thierry Simard purchased the 957g sample from a meteorite dealer in Erfoud, Morocco, in 2019.

Physical characteristics: Sample is brownish-yellow in color, has a rounded, irregular shape and displays a heavily sand-blasted exterior with visible chondrules on the outer surface. Abundant chondrules and clasts are visible on the cut face showing the interior of the sample.

Petrography: Description and classification (A. Love and J. Serensics, App) Sample is a breccia composed of poorly equilibrated, elongated chondrules (average aspect ratio of 1.54, n=27) that share preferred orientation (average apparent diameter 586 μm, n=90) set within a clastic host containing containing mineral and chondrule fragments and ~1 vol% FeNi metal. Clinoenstatite is present.

Geochemistry: (J. Serensics, App) Olivine Fa22.5±6.6 (range Fa9.8-29.8), Fe/Mn=51.6±9.8, n=14. Cr2O3 in type II chondrules has an average of 0.1±0.1 wt%, n=14); low Ca-pyroxene Fs14.3±8.3Wo1.7±2.8 (range Fs2.2-24.4Wo0.2-2.2), n=14.

Classification: Ordinary chondrite (LL3, C-S5 W2) Based on texture, metal abundance, chondrule diameter and magnetic susceptibility this sample is an LL chondrite breccia. Maskelynite, yellow stained olivine melt pockets and shock veins indicate shock level of C-S5.

Specimens: Thierry Simard holds the main mass. An end cut, several smaller slices and fragments that comprise the 20.05 g type specimen and a polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2019
Mass (g):957
Shock stage:C-S5
Weathering grade:W2
Fayalite (mol%):22.5±6.6
Ferrosilite (mol%):14.3±8.3
Wollastonite (mol%):1.7±2.8
Magnetic suscept.:4.43
Classifier:A. Love, App
Type spec mass (g):957
Type spec location:App
Main mass:Thierry Simard
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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