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Northwest Africa 14178
Basic information Name: Northwest Africa 14178
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14178
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 440 g
Recommended:  Lunar (bas. breccia)    [explanation]

This is 1 of 18 approved meteorites classified as Lunar (bas. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 6 Oct 2021
Writeup from MB 110:

Northwest Africa 14178 (NWA 14178)

(Northwest Africa)

Purchased: 2020 May

Classification: Lunar meteorite (basaltic breccia)

History: Purchased by Luc Labenne in June 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fresh monomict breccia consisting of lithic basaltic clasts plus matrix composed of related crystalline debris. Basalt clasts have intergranular texture and are composed predominantly of zoned olivine, zoned clinopyroxene and birefringent calcic plagioclase together with accessory ilmenite, troilite, fayalite, silica polymorph and merrillite. Some plagioclase associated with fayalite, silica and merrillite is notably ferroan. Some lithic clasts have cross-cutting thin, dark glassy shock veinlets.

Geochemistry: Pigeonite core (Fs30.3Wo16.8, FeO/MnO = 52), subcalcic augite core (Fs30.6Wo23.1, FeO/MnO = 56), ferropigeonite rims (Fs76.9-80.7Wo18.3-21.7, FeO/MnO = 82-90, N = 3), augite (Fs20.5Wo40.4, FeO/MnO = 58), ferroan augite (Fs56.9Wo41.9, FeO/MnO = 97), olivine cores (Fa34.2-54.6, FeO/MnO = 90-110, N = 7), fayalite rims (Fa75.0-100.0, FeO/MnO = 89-114, N = 5), plagioclase (An85.2-89.0Or0.0.7-0.2, N = 3), Fe-bearing plagioclase (An85.8Or2.5, FeO = 2.5 wt.%).

Classification: Lunar (monomict basaltic breccia, low shock).

Specimens: 20.1 g including one polished thin section at UWB; remainder with Labenne.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 May
Mass (g):440
Class:Lunar (bas. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):36.8-100.0
Ferrosilite (mol%):30.3-80.7; 20.5-56.9
Wollastonite (mol%):16.8-23.1; 40.4-41.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:Labenne
Comments:Work name LAB21-14; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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