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Northwest Africa 11233
Basic information Name: Northwest Africa 11233
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11233
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 61 g
Meteoritical Bulletin:  MB 106  (2018)  R4-5
Recommended:  R4-5    [explanation]

This is 1 of 6 approved meteorites classified as R4-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 28 Nov 2017
Writeup from MB 106:

Northwest Africa 11233 (NWA 11233)

(Northwest Africa)

Purchased: 2017 Jan

Classification: Rumuruti chondrite (R4-5)

History: Purchased by Adam Aaronson in Temara, Morocco in January 2017.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of equilibrated chondrule-bearing clasts of types 4 and 5 set in a fine-grained matrix containing chromite, troilite and pentlandite but no metal. Portions of the studied specimen exhibit much more terrestrial weathering than other much fresher portions.

Geochemistry: Olivine (Fa38.6-39.1, N = 3), orthopyroxene (Fs30.0-30.1Wo1.5-3.3, N = 3), clinopyroxene (Fs11.1-11.7Wo45.5-44.5, N = 2).

Classification: R4-5 chondrite breccia.

Specimens: 13.7 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2017 Jan
Mass (g):61
Shock stage:S2
Weathering grade:variable
Fayalite (mol%):38.6-39.1
Ferrosilite (mol%):30.0-30.1
Wollastonite (mol%):1.5-3.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):13.7
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M1993; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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