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Northwest Africa 13891
Basic information Name: Northwest Africa 13891
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13891
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 210 g
Recommended:  LL3    [explanation]

This is 1 of 431 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 23 Apr 2022
Writeup from MB 111:

Northwest Africa 13891 (NWA 13891)


Purchased: 2019

Classification: Ordinary chondrite (LL3)

History: (Ziyao Wang) Purchased by Ziyao Wang from a Moroccan dealer at the China Mineral & Gem Show in Beijing City in Nov. 2019

Physical characteristics: (Ziyao Wang) A stone with a triangular shape; many chondrules can be seen on the surface; without fusion crust

Petrography: (R. Bartoschewitz, Bart) The meteorite is composed of about 90% sharply outlined, round to heavily deformed chondrules (0.3-3 mm, av. 0.9 mm) of various types with abundant metallic rims and metallic inclusions and about 10% interchondrule black matrix.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa26.8 (15.2-32.0; n=9); pyroxene Fs13.4 (11.9-17.8) Wo1.0 (0.6-1.6; n=6), diopside En61Fs5Wo34. Kamacite Ni=5.2±0.5, Co=1.4±0.4 (n=4); taenite Ni=41.1±2.7, Co=0.3±0.04 (n=4) wt%; tetrataenite and troilite. O-isotopes (A. Pack, T. Di Rocco, and A. Gehler, UGött): δ17O(‰) = 4.579, δ18O(‰) = 6.736, D’17O(0.528) (ppm) = 1.024. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.50

Classification: Ordinary chondrite (LL3 cluster chondrite, S2, W1)

Specimens: 20.3 g on deposit at IfP, Ziyao Wang holds the main mass, and 62 g with Bart. Polished thin sections with Bart + IfP

Data from:
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Beijing, China
Date:P 2019
Mass (g):210
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):26.8±5.3 (n=9)
Ferrosilite (mol%):13.4±2.0 (n=6)
Wollastonite (mol%):1.0±0.3
Magnetic suscept.:4.50
Classifier:R. Bartoschewitz
Type spec mass (g):20.3
Type spec location:IfP
Main mass:Ziyao Wang
Comments:working name WZ166; submitted by R. Bartoschewitz
Plots: O isotopes:  
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)
Gehler: A. Gehler, D-37075 Göttingen, Germany , Germany (private address; updated 10 Jun 2015)
UGött: Geowissenschaftliches Museum, Georg-August-Universität Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany; Website (institutional address; updated 26 Nov 2020)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1903 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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