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Northwest Africa 14576
Basic information Name: Northwest Africa 14576
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14576
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 10.05 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (frag. breccia)
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 33 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 29 Jan 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14576 (NWA 14576)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (frag. breccia)

History: Purchased from a meteorite dealer in Mauritania in 2021.

Physical characteristics: Three identical appearing pieces (2.74 kg, 2.41 kg, and 4.90 kg) found together. Saw cut slice surfaces shows numerous dark gray and white clasts many of which are angular, also a few breccia clasts with a distinct appearance from the host groundmass breccia are visible.

Petrography: (A. Ross and C. Agee, UNM) Electron microprobe analysis and reflected light microscopy indicate a lunar polymict breccia. Major phases are plagioclase, olivine, and pyroxene; minor phases Cr-spinel, ilmenite, zircon, troilite, and Fe-metal (low Ni) were detected.

Geochemistry: (A. Ross, UNM) Plagioclase An96.1±1.7Ab3.6±0.3, n=4; olivine Fa32.1±7.5, Fe/Mn=99±7, n=6; pigeonite Fs30.1±3.8Wo9.7±3.5, Fe/Mn=53±5, n=4; augite Fs15.3±4.5Wo39.9±2.7, Fe/Mn=45±6, n=2.

Classification: Lunar fragmental breccia

Specimens: 24.8 g on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):10050
Pieces:3
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):32.1±7.5
Ferrosilite (mol%):30.1±3.8, 15.3±4.5
Wollastonite (mol%):9.5±7.1, 39.9±2.7
Classifier:C. Agee, UNM
Type spec mass (g):24.8
Type spec location:UNM
Main mass:Mark Lyon
Comments:Field name ML-9; 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Robert Smart      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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