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Northwest Africa 14729
Basic information Name: Northwest Africa 14729
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14729
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 2.3 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 14729 (NWA 14729)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (melt breccia)

History: Purchased from a Moroccan meteorite dealer in 2021.

Physical characteristics: Single stone, dark green-brown, sandblasted exterior. Sawcut surfaces reveal this meteorite to be a breccia with fragments of fine-grained light colored host rock set darker vesicular melt-rock matrix.

Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected microscopy of a polished mount show this meteorite to be a polymict lunar melt breccia with an anorthositic troctolite host rock consisting of fine-grained olivine and lesser amounts of pyroxene poikilitically enclosed in plagioclase. The matrix consists of vesicular melt rock. and very fine-grained minerals and rock clasts. Trace amounts of chromite, ilmenite, troilite, and Fe-metal (low Ni) were detected.

Geochemistry: (A. Ross, UNM) Olivine Fa25.4±5.3, Fe/Mn=102±18, n=10; pigeonite Fs16.4±3.6Wo4.5±1.5, Fe/Mn=54±5, n=7; subcalcic augite Fs16.1±5.1Wo30.1±7.7, Fe/Mn=50±2, n=3; plagioclase An96.0±1.7, n=6.

Classification: Lunar (polymict anorthositic troctolite melt breccia), nomenclature based on Stoeffler et al. (1980). The Mg# of olivine and An-content of plagioclase of this meteorite are consistent with that of the Apollo Lunar Mg-suite (Warren, 1993).

Specimens: 27.6 g on deposit at UNM, Craig Zlimen and Mark Lyon hold 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)
  • Warren P.H. (1993) A concise compilation of petrologic information on possibly pristine nonmare Moon rocks. American Mineralogist 78 (3-4), 360-376. (link)
Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):2.3 kg
Pieces:1
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):25.4±5.3
Ferrosilite (mol%):16.4±3.6, 16.1±5.1
Wollastonite (mol%):4.5±1.5, 30.1±7.7
Classifier:C. Agee, UNM
Type spec mass (g):27.6
Type spec location:UNM
Main mass:Craig Zlimen and Mark Lyon
Comments:Field name CAZ-047; 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 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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