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Northwest Africa 11612
Basic information Name: Northwest Africa 11612
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11612
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 274 g
Meteoritical Bulletin:  MB 107  (2018)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 453 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 20 Feb 2018
Writeup from MB 107:

Northwest Africa 11612 (NWA 11612)

(Northwest Africa)

Purchased: 2017 Aug

Classification: HED achondrite (Howardite)

History: Purchased in Temara, Morocco, by Aaronson in August 2017.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular grains of diogenitic orthopyroxene (~60 vol.%), exsolved pigeonite, bytownitic plagioclase and some polycrystalline diogenite clasts in a finer grained matrix containing silica polymorph, Ti-poor chromite, ilmenite, Ni-free metal, troilite, zircon and minor secondary calcite.

Geochemistry: Orthopyroxene host (Fs52.0Wo1.3; Fs36.8-39.6Wo1.7-1.6; FeO/MnO = 30-31; N = 3), clinopyroxene exsolution lamellae (Fs14.4-14.5Wo45.1-43.1, FeO/MnO = 23, N = 2), diogenitic orthopyroxene (Fs34.8Wo2.5, FeO/MnO = 30), plagioclase (An74.6-83.0Or1.0-0.6, N = 2).

Classification: Howardite.

Specimens: 24 g including one polished thin section at UWB; main mass with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2017 Aug
Mass (g):274
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):34.8-39.6
Wollastonite (mol%):2.5-1.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M2046; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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