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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
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (frag. breccia)
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 35 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Mar 2022
Writeuphelp
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:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):885
Pieces:1
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
Institutions
   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)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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