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Northwest Africa 16282
Basic information Name: Northwest Africa 16282
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16282
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 7.53 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  Lunar (melt breccia)
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 28 approved meteorites classified as Lunar (melt breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Nov 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16282 (NWA 16282)

(Northwest Africa)

Purchased: 2023

Classification: Lunar meteorite (melt breccia)

History: Purchased from Bachir Salek by Fossil Realm Inc. in 2023.

Physical characteristics: Single roughly spheroidal stone. Exterior is very dark in color with irregular to smooth, sandblasted, vesiculated fusion crust. Approximately half of the mass is coated with caliche owing to partial burial in the desert. Freshly chipped surface reveals the interior of this meteorite to be a breccia with scattered fragments of light-colored clasts set in a dark-gray to black cryptocrystalline matrix.

Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected light microscopy of a polished mount show this meteorite to be an anorthositic gabbronorite melt breccia consisting primarily of fine-grained pigeonite with lesser amounts of augite and olivine all of which are scattered and poikilitically enclosed in a dominant plagioclase-rich vesicular melt rock host. Minor amounts of ilmenite, troilite, Fe-metal (low Ni), and Ti-chromite, Al-spinel, and Cr-Ti spinel were detected.

Geochemistry: (A. Ross, UNM) Olivine Fa31.6±7.6, Fe/Mn=95±8, n=12; pigeonite Fs21.6±0.5Wo6.0±3.4, Fe/Mn=60±9, n=9; augite Fs14.0±3.3Wo40.5±0.9, Fe/Mn=47±4, n=3; plagioclase An95.8±1.0, n=6.

Classification: Lunar (anorthositic gabbronorite melt breccia), nomenclature based on Stoeffler et al. (1980).

Specimens: 24 g on deposit at UNM, Fossil Realm Inc. holds the main mass.

Bibliography:
  • Stoeffler D., Knoell H.-D., Marvin U.B., Simonds C.H., and Warren, P.H. (1980) Recommended classification and nomenclature of lunar highland rocks - A committee report. In: Conference on the Lunar Highlands Crust, Houston, Tex., November 14-16, 1979, Proceedings. (A81-26201 10-91) New York and Oxford, Pergamon Press, 1980, p. 51-70. (link)
Data from:
  MB112
  Table 0
  Line 0:
Date:P 2023
Mass (g):7525
Pieces:1
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):31.6±7.6
Ferrosilite (mol%):21.6±0.5, 14.0±3.3
Wollastonite (mol%):6.0±3.4, 40.5±0.9
Classifier:C. Agee, UNM
Type spec mass (g):24
Type spec location:UNM
Main mass:Fossil Realm Inc.
Comments:Fieldname S-22; submitted by C. Agee
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., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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Photos:
CreditPhotos
Public domain photographs:
Carl Agee         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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