Lunar Meteorite 1.9g | Lunar Breccia | The Moon
|Northwest Africa 11228|
Name: Northwest Africa 11228
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11228
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 140 g
This is 1 of 117 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)
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.
|UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)|
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