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Northwest Africa 13899
Basic information Name: Northwest Africa 13899
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13899
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 5.5 g
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 19 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 Nov 2021
Writeup from MB 110:

Northwest Africa 13899 (NWA 13899)

(Northwest Africa)

Purchased: 2019

Classification: Lunar meteorite (frag. breccia)

History: In 2019 at the mineral show in Beijing Ziyao Wang discovered on the bottom of a box with ordinary chondrites from northwest Africa some small strange stones. This one he donated to Rainer Bartoschewitz.

Physical characteristics: 5.5 g gray grooved irregular fragment with orange soil adhersions. Gray cut face with white inclusions and few metallic specks.

Petrography: (R. Bartoschewitz, Bart) Polymict fragmental breccia of dominately mafic lithic clasts (gabbro, dunite) with accessoric chromite, silica, kamacite and taenite, minor anorthosite clasts (frequently transformed to maskelynite), and mineral fragments.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa20.4-41.9 (Fe/Mn 65-118; n=4); fayalite Fa85.0 (n=1); augite En28-50Fs55-14Wo18-35 (Fe/Mn 47-74; n=4); anorthite An94.2-97.4Or<0.5 (n=7); chromite CRAL=62, FFM=68 (n=1). Ilmenite MgO=4.5 wt% (n=1); kamacite Ni=2.9-6.7, Co=1.5-0.5wt% (n=5). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.10

Classification: lunar meteorite (fragmental breccia)

Specimens: 1.24 g on deposit at IfP, main mass 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):5.5
Class:Lunar (frag. breccia)
Shock stage:high
Fayalite (mol%):38.3 (20.4-85.0; n=7)
Ferrosilite (mol%):37.9 (14.6-54.8; n=4)
Wollastonite (mol%):17.4-35.2
Magnetic suscept.:4.1
Classifier:R. Bartoschewitz
Type spec mass (g):1.24
Type spec location:IfP
Main mass:Rainer Bartoschewitz
Comments:working name WZD#27; submitted by R. Bartoschewitz
   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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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