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Northwest Africa 14769
Basic information Name: Northwest Africa 14769
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14769
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 885 g
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 19 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14769 (NWA 14769)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (frag. breccia)

History: Purchased by Rob Wesel from a meteorite dealer in Algeria, 2021.

Physical characteristics: Saw cut slice surface shows numerous white, light gray and dark gray clasts set in a dark gray to black host groundmass.

Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected light microscopy indicate a lunar polymict breccia. There is a large range of olivine and pyroxene compositions present. Major phases are plagioclase, pyroxene, and olivine; minor phases, chrome spinel (Ti-rich), Cr-Ti magnetite, ilmenite, Fe-sulfide, silica, and Fe-metal (low Ni) were detected. A significant portion of the groundmass consists of vesicular anorthositic shock melt.

Geochemistry: (A. Ross, UNM) Olivine Fa48.3±12.1, Fe/Mn=89±16, n=7; low-Ca pyroxene Fs36.0±9.3Wo2.3±0.6, Fe/Mn=58±3, n=3; pigeonite Fs33.7±13.6Wo13.3±9.1, Fe/Mn=58±8, n=2; subcalcic augite Fs27.0Wo34.7, Fe/Mn=63, n=1; plagioclase An95.8±0.4, n=4; anorthositic shock melt (proxy for bulk composition) SiO2=41.3±1.7, Al2O3=30.2±1.4, TiO2=0.19±0.06, MgO=3.4±1.3, FeO=4.0±1.3, CaO=17.0±0.7, Na2O=0.29±0.13 (all wt%), n=3.

Classification: Lunar (fragmental breccia), polymict based on the olivine and pyroxene compositional spans.

Specimens: 23.8 g on deposit at UNM, Steve Arnold holds 16.8 g, Rob Wesel holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):885
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):48.3±12.1
Ferrosilite (mol%):36.0±9.3, 33.7±13.6, 27.0
Wollastonite (mol%):2.3±0.6, 13.3±9.1, 34.7
Classifier:C. Agee, UNM
Type spec mass (g):23.8
Type spec location:UNM
Main mass:Rob Wesel
Comments:RW-1; submitted by C. Agee, UNM
   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 Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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