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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
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 255 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Aug 2021
Writeuphelp
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:
  MB110
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Chenzhou, China
Date:P 2019
Mass (g):31
Pieces:1
Class:Eucrite-mmict
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
Finder:anonymous
Comments:working name WZD#28; submitted by R. Bartoschewitz
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Rainer Bartoschewitz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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