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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:
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 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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