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Northwest Africa 7823
Basic information Name: Northwest Africa 7823
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7823
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 228 g
Meteoritical Bulletin:  MB 103  (2014)  L3
Recommended:  L3    [explanation]

This is 1 of 729 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 8 Nov 2014
Writeup from MB 103:

Northwest Africa 7823 (NWA 7823)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (L3)

History: Purchased by M. Bandli in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fairly closely packed, well formed, medium-sized chondrules (diameters range from 0.4 to 2.0 mm). Olivine, orthopyroxene, pigeonite, subcalcic augite, sodic plagioclase, chromite, troilite and altered kamacite.

Geochemistry: Olivine (Fa0.3-42.9; Cr2O3 in ferroan examples 0.05-0.13 wt.%, mean 0.09 wt.%, sd 0.03 wt.%, N =7), orthopyroxene (Fs1.8-24.8Wo0.7-1.7, N = 3), pigeonite (Fs24.8Wo5.2), subcalcic augite (Fs14.1Wo31.2).

Classification: Ordinary chondrite (L3).

Specimens: A total of 20.1 g of material and one polished thin section are on deposit at UWB. M. Bandli holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):228
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.3-42.9
Ferrosilite (mol%):1.8-24.8
Wollastonite (mol%):0.7-1.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:M. Bandli
Comments:B311; 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 Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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