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Northwest Africa 7833
Basic information Name: Northwest Africa 7833
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7833
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 1320 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 7833 (NWA 7833)

(Northwest Africa)

Purchased: 2012 Jan

Classification: Ordinary chondrite (L3)

History: Purchased by S. Haddany in Rissani, Morocco in January 2012.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules are set in a sparse, fine grained, almost opaque matrix. Olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, troilite and stained kamacite. Chondrule diameter range: 0.6-1.8 mm.

Geochemistry: Olivine (Fa1.1-31.7; Cr2O3 in ferroan olivine 0.04-0.15 wt.%, mean 0.07 wt.%, sd 0.04 wt.%, N = 8), orthopyroxene (Fs5.5-21.6Wo0.3-0.8, N = 3), subcalcic augite (Fs38.3Wo29.6), augite (Fs17.2Wo40.7).

Classification: Ordinary chondrite (L3, shock darkened).

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

Data from:
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2012 Jan
Mass (g):1320
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):1.1-31.7
Ferrosilite (mol%):5.5-21.6
Wollastonite (mol%):0.3-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:S. Haddany
Comments:SH13-31; 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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