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Northwest Africa 14681
Basic information Name: Northwest Africa 14681
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14681
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 4.9 kg
Classification
  history:
Recommended:  Lunar (troct. anorth.)    [explanation]

This is 1 of 5 approved meteorites classified as Lunar (troct. anorth.).   [show all]
Search for other: Lunar meteorites
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14681 (NWA 14681)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (troctolitic anorthosite)

History: Purchased from a Moroccan meteorite dealer in 2021.

Physical characteristics: Desert weathered exterior. Sawcut surfaces show a breccia with light gray and dark gray clasts. Reflected light microscopy reveals abundant small vesicles throughout.

Petrography: (C. Agee, UNM) This meteorite is a troctolitic anorthosite (Prinz and Keil, 1977) with plagioclase (~85%), olivine (~10%), and pigeonite (~1%). Minor phases include troilite and chromite. Metal was not detected.

Geochemistry: (A. Ross, UNM) Plagioclase An96.4±1.5Ab3.5±1.5Or0.2±0.1, n=8; olivine Fa23.8±5.6, Fe/Mn=89±5, n=12; pigeonite Fs23.4±1.1Wo15.6±3.9, Fe/Mn=48±6, n=6.

Classification: Lunar (troctolitic anorthosite) based on Stoeffler et al. (1980).

Specimens: 50.1 g on deposit at UNM, Mark Lyon holds the main mass.

Bibliography:
  • Prinz M. and Keil K. (1977) Mineralogy, petrology and chemistry of ANT-suite rocks from the lunar highlands. Phys. Chem. Earth 10, 215-237 (link)
  • 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):4.9 kg
Pieces:1
Class:Lunar (troct. anorth.)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):23.8±5.6
Ferrosilite (mol%):23.4±1.1
Wollastonite (mol%):15.6±3.9
Classifier:C. Agee, UNM
Type spec mass (g):50.1
Type spec location:UNM
Main mass:Mark Lyon
Comments:Fieldname SMB-21 (ML-25); 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 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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