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Northwest Africa 12368
Basic information Name: Northwest Africa 12368
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12368
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1868 g
Meteoritical Bulletin:  MB 107  (2018)  Lunar (feldsp. breccia)
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 6 Dec 2018
Writeup from MB 107:

Northwest Africa 12368 (NWA 12368)

(Northwest Africa)

Purchased: 2018

Classification: Lunar meteorite (feldspathic breccia)

History: Found in the spring of 2017 in the Moroccan Sahara and purchased in Temara by A. Aaronson on July 23, 2018.

Physical characteristics: Single complete stone, no fusion crust; saw cut reveals a fragmental breccia with scattered white feldspathic and mafic clasts set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This meteorite consists primarily of fragmental pyroxene, olivine, feldspathic and mafic clasts, and shock melt. Ubiquitous Fe-Ti-Cr-Al oxides are present, rare kamacite was detected. There appears to be 2 or 3 distinct populations of pyroxenes and olivines, suggesting that this is a polymict breccia.

Geochemistry: (C. Agee, UNM) olivine Fa53.3±11.8, Fe/Mn=96±7, n=7; fayalite Fa91.8±2.9, Fe/Mn=91±8, n=3; pigeonite Fs26.0±1.3Wo6.4±1.3, Fe/Mn=51±3, n=7; subcalcic augite Fs38.3±3.2Wo24.2±4.3, Fe/Mn=57±3, n=2; ferro-augite Fs63.9±4.3Wo30.4±7.6, Fe/Mn=92±21, n=2; plagioclase An95.5±1.4, n=6; Shock melt (20 _m defocused electron beam, proxy for bulk meteorite composition): SiO2=44.6±1.5, TiO2=0.18±0.13, Al2O3=28.8±4.2, Cr2O3=0.11±0.14, MgO=4.1±1.8, FeO=4.2±2.1, MnO=0.07±0.03, CaO=16.8±1.9, NiO=0.02±0.02, Na2O=0.54±0.14, K2O=0.06±0.04 (all wt%), n=3.

Classification: Lunar feldspathic breccia

Specimens: 20.6 g including a probe mount on deposit at UNM, Adam Aaronson holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):1868
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):53.3±11.8, 91.8±2.9
Ferrosilite (mol%):26.0±1.3, 38.3±3.2, 63.9±4.3
Wollastonite (mol%):6.4±1.3, 24.2±4.3, 30.4±7.6
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Aaronson
Comments:M2157; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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