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Northwest Africa 11242
Basic information Name: Northwest Africa 11242
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11242
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 67 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 119 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 Jun 2017
Writeup from MB 106:

Northwest Africa 11242 (NWA 11242)

(Northwest Africa)

Purchased: 2017 Feb

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased in Agadir, Morocco by Aziz Habibi in February 2017.

Petrography: (A. Irving and S. Kuehner, UWS) Microgabbroic texture. Composed predominantly of very finely exsolved pigeonite and calcic plagioclase (almost completely converted to maskelynite) with accessory silica polymorph, Ti-chromite, Ni-poor kamacite, taenite and stained troilite. Some thin, dark shock veinlets crosscut the specimen.

Geochemistry: Orthopyroxene (Fs44.7-45.4Wo2.7-2.9, FeO/MnO = 30-31, N = 3), clinopyroxene (Fs20.1-21.2Wo40.4-39.9, FeO/MnO = 27-28, N =3), maskelynite (An89.5-90.0Or0.3, N = 2).

Classification: Eucrite (unbrecciated, microgabbroic, highly shocked). This is an unusual example of an unbrecciated eucrite containing maskelynitized plagioclase.

Specimens: 13.4 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2017 Feb
Mass (g):67
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):44.7-45.4; 20.1-21.2
Wollastonite (mol%):2.7-2.9; 40.4-39.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):13.4
Type spec location:UWB
Main mass:A. Habibi
Comments:Work name AH 226; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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