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Northwest Africa 13908
Basic information Name: Northwest Africa 13908
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13908
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1680 g
Classification
  history:
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 5 approved meteorites classified as Lunar (melt breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 25 Apr 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13908 (NWA 13908)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Lunar meteorite (melt breccia)

History: Purchased in Agadir, Morocco by Aziz Habibi in December 2020.

Physical characteristics: A single dark gray, relatively fine grained stone (1680 g) with an exterior shiny patina.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of mineral clasts of anorthite, olivine, pigeonite, exsolved pigeonite and augite plus mafic lithic clasts in a very fine grained matrix containing metal (with variable Fe:Ni intermediate between values for kamacite and taenite), chromite and ilmenite. Mafic lithic clasts include microgabbro and quench-textured basalt lithologies. The matrix exhibits some fluidal alignment of elongate mineral clasts and is sparsely microvesicular.

Geochemistry: Olivine (Fa24.0-37.5, FeO/MnO = 77-92, N = 5), pigeonite (Fs25.3-41.1Wo8.0-16.6, FeO/MnO = 40-59, N = 4), subcalcic augite (Fs21.1-28.6Wo27.1-32.6, FeO/MnO = 51-53, N = 2), augite (Fs23.3Wo40.9, FeO/MnO = 52), low-Ca pyroxene host (Fs46.0Wo3.2, FeO/MnO = 67), augite exsolution lamella (Fs19.9Wo42.8, FeO/MnO = 58), anorthite (An96.5-97.6Or0.2-0.0, N = 3).

Classification: Lunar (melt breccia). This material has textural, petrologic and mineral chemical features consistent with being paired to the stones classified as NWA 13676 and NWA 13757.

Specimens: 23.0 g including a polished mount at UWB; remainder with Mr. A. Habibi.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2020 Dec
Mass (g):1680
Pieces:1
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:low
Fayalite (mol%):24.0-37.5
Ferrosilite (mol%):25.3-41.1; 21.1-28.6; 23.3
Wollastonite (mol%):8.0-16.6; 27.1-32.6; 40.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.0
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 1007; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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