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Northwest Africa 10621
Basic information Name: Northwest Africa 10621
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10621
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 22 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Apr 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10621 (NWA 10621)

(Northwest Africa)

Purchased: 2015 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Matthew Martin in February 2015 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: The interiors of both stones (total weight 22 g) have a mottled dark and light-gray appearance, with some whitish clasts also present.

Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained and relatively olivine-rich fragmental breccia consisting of mineral clasts of anorthite, olivine, pigeonite, subcalcic augite, augite, ilmenite, armalcolite and kamacite in a matrix containing minor barite.

Geochemistry: Olivine (Fa26.5-26.9, FeO/MnO = 87-90, N = 2), pigeonite (Fs23.1-23.3Wo6.7-7.8, FeO/MnO = 50-58, N = 2), subcalcic augite (Fs13.9Wo34.0, FeO/MnO = 47), augite (Fs12.5Wo37.6, FeO/MnO = 43), plagioclase (An91.1-91.3Or1.1-1.3, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave (in wt.%) FeO 6.7, Na2O 0.50; (in ppm) Sc 9.9, Cr 860, Co 40, La 15.7, Sm 7.2, Eu 1.49, Yb 4.7, Lu 0.65, Hf 5.8, Th 2.4.

Classification: Lunar (feldspathic breccia). Paired with NWA 8455 based on textural and bulk compositional similarities.

Specimens: A 4.36 g polished endcut piece is at UWB; remainder with Mr. M. Martin.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2015 Feb
Mass (g):22
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):26.5-26.9
Ferrosilite (mol%):23.1-23.3
Wollastonite (mol%):6.7-7.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):4.36
Type spec location:UWB
Main mass:M. Martin
Comments:MM16-1; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
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