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Northwest Africa 11228
Basic information Name: Northwest Africa 11228
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11228
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 140 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 342 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 May 2017
Writeup from MB 106:

Northwest Africa 11228 (NWA 11228)

(Northwest Africa)

Purchased: 20 Mar 2017

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Dustin Dickens, March 20, 2017, from Mohamed Maulud.

Physical characteristics: Many irregular shaped fragments, dark sand-blasted exterior, no fusion crust.

Petrography: (C. Agee, UNM) This meteorite is a fragmental breccia with pyroxene, plagioclase, and olivine grains set in fine grained groundmass. Scatttered micro-gabbro fragments were also observed. Ubiquitous, fine grained, accessory Fe-metal and sulfide are present. Minor amount of shock melt was observed in the microprobe section. All pyroxene grains probed were pigeonite, no augite was detected.

Geochemistry: (C. Agee and B. Ha, UNM) Olivine Fa40.2±13.6, Fe/Mn=93±9, n=10; pigeonite Fs36.1±7.9Wo11.6±3.5, Fe/Mn=57±6, n=11; plagioclase An94.4±1.1Ab5.0±1.0Or0.6±0.2, n=5; shock melt (proxy for bulk composition) Al2O3=26±1, TiO2=0.14±0.09, MgO=12±6, FeO=3±2 (all wt%), n=2.

Classification: Lunar (feldspathic breccia)

Specimens: 20.3 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 20 Mar 2017
Mass (g):140
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):40.2±13.6
Ferrosilite (mol%):36.1±7.9
Wollastonite (mol%):11.6±3.5
Classifier:C. Agee, UNM
Type spec mass (g):20.3
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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 from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Eric Escrich      
Kenneth Alvarez Castillo   
Ryan Upchurch   

     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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