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Northwest Africa 12789
Basic information Name: Northwest Africa 12789
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12789
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 22.5 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 312 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 12789 (NWA 12789)

Morocco

Purchased: 2019

Classification: Lunar meteorite (feldspathic breccia)

History: (Ziyao Wang) Purchased by Ziyao Wang from a Moroccan dealer in Yiwu/Zhejiang in Apr 2019

Physical characteristics: (Ziyao Wang) Gray-brown irregular shaped stone of 22.5 g, without fusion crust; on surface, a brecciated texture is visible.

Petrography: (R. Bartoschewitz, Bart) fine-grained, melt-textured breccia consisting of mineral fragments (olivine, pyroxene, plagioclase, accessory chromite, ilmenite, metal) and lithic clasts (gabbroic, anorthositic, melt-rock).

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.0±4.6, Fe/Mn=83 (n=10); low-Ca pyroxene Fs24.9±4.3Wo3.4±1.0, Fe/Mn=59 (n=3); pigeonite En63Fs25Wo12 (n=1); plagioclase An92-98Or<0.2 (n=18); chromite CRAL66-76, FFM67-80 (n=2); ilmenite. Kamacite Ni=1.8-8.2, Co=0.7-1.0 wt% (n=3). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 3.16.

Classification: Lunar (feldspatic melt-breccia)

Specimens: 4.7 g on deposit at Kiel, Wang Ziyao holds the main mass, and 4 g with Bart.

Data from:
  MB112
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Yiwu, Zhejiang
Date:P 2019
Mass (g):22.5
Pieces:1
Class:Lunar (feldsp. breccia)
Fayalite (mol%):24.0±4.6 (n=10)
Ferrosilite (mol%):24.9±4.3 (n=3)
Wollastonite (mol%):Wo3.4±1.0
Magnetic suscept.:3.16
Classifier:R. Bartoschewitz
Type spec mass (g):4.7
Type spec location:Kiel
Main mass:Ziyao Wang
Finder:anonymous
Comments:working name WZ123; submitted by R. Bartoschewitz
Institutions
   and collections		 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. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1972 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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