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Northwest Africa 14747
Basic information Name: Northwest Africa 14747
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14747
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 5.3 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  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 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14747 (NWA 14747)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (melt breccia)

History: Purchased in Morocco from Adam Aaronson by Michael Farmer in 2021. Steve Jurvetson holds the main mass.

Physical characteristics: Exterior is sandblasted, dark gray in color, with irregular surface topography. Sawcut surfaces reveal this meteorite to be a breccia with scattered fragments of light-colored clasts set in dark gray 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 subcalcic augite and olivine all of which are poikilitically enclosed in a plagioclase-rich vesicular melt rock host. Trace amounts of ilmenite, troilite, Fe-metal (low Ni), and CuZn-metal alloy were detected.

Geochemistry: (A. Ross, UNM) Olivine Fa26.0±0.6, Fe/Mn=94±11, n=6; pigeonite Fs21.6±0.5Wo4.5±0.2, Fe/Mn=56±3, n=4; subcalcic augite Fs14.0±3.3Wo38.2±1.4, Fe/Mn=46±9, n=4; plagioclase An96.0±0.6, n=4.

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

Specimens: 22.4 g on deposit at UNM, Steve Jurvetson 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:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):5.3 kg
Pieces:1
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):26.0±0.6
Ferrosilite (mol%):21.6±0.5, 14.0±3.3
Wollastonite (mol%):4.5±0.2, 38.2±1.4
Classifier:C. Agee, UNM
Type spec mass (g):22.4
Type spec location:UNM
Main mass:Steve Jurvetson
Comments:field name M2250; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
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