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Northwest Africa 12791
Basic information Name: Northwest Africa 12791
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12791
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 27 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 12791 (NWA 12791)

Morocco

Purchased: 2019

Classification: HED achondrite (Eucrite)

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

Physical characteristics: (Ziyao Wang) brown irregularly shaped stone of 27 g, without fusion crust

Petrography: (R. Bartoschewitz, Bart) intergranular phenocrysts of pyroxene and feldspar. Pyroxene phenocrysts are of aphanitic texture (grain size ~20 µm) with few microcrysts (>30 µm), while feldspar phenocrysts present a micro trachytic texture. In our section this intergranular texture shows a transition to a turbid melt texture.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Low Ca pyroxene Fs59.2±0.5Wo3.4±0.3, Fe/Mn=32 (n=2); pigeonite En35-45Fs49-57Wo5-10 (n=16); augite En30-33Fs27-52Wo18-42 (n=5); plagioclase An87-91Or<1 (n=11); chromite CRAL74-79, FFM4-9 (n=3); ilmenite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 2.60.

Classification: Achondrite (basaltic eucrite)

Specimens: 5.47 g on deposit at Kiel, Wang Ziyao holds the main mass, and 6 g with Bart.

Data from:
  MB110
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Yiwu, Zhejiang
Date:P 2019
Mass (g):27.0
Pieces:1
Class:Eucrite
Ferrosilite (mol%):59.2±0.5 (n=2)
Wollastonite (mol%):Wo3.4±0.3
Magnetic suscept.:2.60
Classifier:R. Bartoschewitz
Type spec mass (g):5.47
Type spec location:Kiel
Main mass:Ziyao Wang
Finder:anonymous
Comments:working name WZ125; 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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

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