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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:
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 10 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 Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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