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Northwest Africa 11421
Basic information Name: Northwest Africa 11421
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11421
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 912 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 99 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 23 Sep 2017
Writeup from MB 106:

Northwest Africa 11421 (NWA 11421)

(Northwest Africa)

Purchased: 2017

Classification: Lunar meteorite

History: The meteorite was bought in 2017 from a meteorite dealer in Erfoud, Morocco.

Physical characteristics: Many small grayish individuals lacking any fusion crust. White to beige clasts in greyish matrix are visible at the surface.

Petrography: The meteorite is a breccia composed of angular to subrounded whitish clasts up to 1 cm in size set into a greyish vitreous groundmass. Mineral fragments are also present in the matrix. Dominant mineral phases are low-Ca pyroxene, Ca- pyroxene, olivine and calcic plagioclase. Minor phases include chromite, ilmenite, fayalite, pyrrhotite, FeNi metal, and barite. Contains some melt regions displaying quenching textures of dendritic pyroxene and plagioclase.

Geochemistry: olivine: Fa30.1±10.4 (Fa18.4-52, n=16, FeO/MnO=79-112); low-Ca pyroxene: Fs33.3±2,8Wo2.5±1.0 (Fs30.4-36.4Wo1.4-3.8, n=10, FeO/MnO=55-64); Ca-pyroxene: Fs16.1±4.0Wo40.0±4.2 (Fs8.9-23.2Wo31.3-45.1, n=14, FeO/MnO=36-64); calcic plagioclase: An96.4±0.8 (An95.4-98.0, n=16)

Classification: Lunar (feldspathic breccia)

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2017
Mass (g):912
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):30.1
Ferrosilite (mol%):33.3; 16.1
Wollastonite (mol%):2.5; 40.0
Classifier:A. Greshake, MNB
Type spec mass (g):21.4
Type spec location:MNB
Main mass:Tomasz Jakubowski and Marcin Cimala
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dave Johnson   
Dirk Hohmann   
Jörg-Florian Jensch   
Marcin Cimala   
Stefano Prosperi   
Woreczko Jan & Wadi            

     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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