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Northwest Africa 13900
Basic information Name: Northwest Africa 13900
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13900
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 31 g
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Aug 2021
Writeup from MB 110:

Northwest Africa 13900 (NWA 13900)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, monomict)

History: In May 2019 at the mineral show in Chenzhou Ziyao Wang discovered, on the bottom of a box with ordinary chondrites from northwest Africa, some small strange stones and donated them to Rainer Bartoschewitz. Some of these stones were meteoritic and others of terrestrial origin.

Physical characteristics: 31 g broken individual with about 60% black lustery fusion crust. The broken face shows orange-gray adhering soil.

Petrography: (R. Bartoschewitz, Bart) silicate fragments (pyroxene, feldspar, chromite and rare troilite) up to 0.7 mm and few gabbroic clasts up to 1 mm set in a fine grained matrix (<50 µm).

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) poor Ca pyroxene Fs41-44Wo2-5, FeO/MnO=30 (n=12); pigeonite En49Fs35Wo16 (n=1); augite En39-42Fs17-19Wo44-40 (n=2); feldspar An93-96Or<1 (n=62); chromite CRAL=80-84, FFM=94-96 (n=17); troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 2.45

Classification: Eucrite, cumulate

Specimens: 6.2 g on deposit at IfP, main mass with Bart.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Chenzhou, China
Date:P 2019
Mass (g):31
Ferrosilite (mol%):43.2±1.0 (n=12)
Wollastonite (mol%):2.7±1.3
Magnetic suscept.:2.45
Classifier:R. Bartoschewitz
Type spec mass (g):6.2
Type spec location:IfP
Main mass:Rainer Bartoschewitz
Comments:working name WZD#28; 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)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Public domain photographs:
Rainer Bartoschewitz   

     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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