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Northwest Africa 11492
Basic information Name: Northwest Africa 11492
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11492
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 172 g
Meteoritical Bulletin:  MB 106  (2018)  L4
Recommended:  L4    [explanation]

This is 1 of 2000 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Oct 2017
Writeup from MB 106:

Northwest Africa 11492 (NWA 11492)

(Northwest Africa)

Purchased: 2017 Apr

Classification: Ordinary chondrite (L4)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely packed chondrules occur in a finer grained matrix containing altered metal.

Geochemistry: Olivine (Fa21.9-24.5, Cr2O3 < 0.02 wt.%, N = 6), orthopyroxene (Fs19.9-20.1Wo1.0-1.5, N = 2), pigeonite (Fs16.9Wo15.8), subcalcic augite (Fs12.7Wo31.2), augite (Fs12.8Wo38.3).

Classification: Ordinary chondrite (L4).

Specimens: 20.6 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2017 Apr
Mass (g):172
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):21.9-24.5
Ferrosilite (mol%):19.9-20.1
Wollastonite (mol%):1.0-1.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.6
Type spec location:UWB
Main mass:Aaronson
Comments:Work name M2011; 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)
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)
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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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