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Northwest Africa 8253
Basic information Name: Northwest Africa 8253
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8253
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 59 g
Meteoritical Bulletin:  MB 104  (2015)  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 28 Oct 2015
Writeup from MB 104:

Northwest Africa 8253 (NWA 8253)

(Northwest Africa)

Purchased: 2013 Oct

Classification: Ordinary chondrite (L3)

History: Purchased by Adam Aaronson in Temara, Morocco in October 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Closely-packed, well-formed, medium-sized (0.6-2.1 mm, mean 1.3±0.5mm) chondrules and relatively sparse altered metal. Minerals are olivine, orthopyroxene, augite, sodic plagioclase, altered kamacite, chromite, taenite and troilite.

Geochemistry: Olivine (Fa2.9-39.9, N = 9; Cr2O3 in ferroan examples = 0.03-0.11 wt.%, mean 0.06±0.03 wt.%, N =7), orthopyroxene (Fs3.0-19.2Wo0.2-3.7, N = 3), augite (Fs2.9-6.3Wo41.4-38.9).

Classification: Ordinary chondrite L3. Estimation of subtype 3.5 based on histograms of Cr2O3 distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 13.7 g including one polished thin section at UWB. The remainder is held by Aaronson.

  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 Oct
Mass (g):59
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):2.9-39.9
Ferrosilite (mol%):3.0-19.2
Wollastonite (mol%):0.2-3.7
Magnetic suscept.:4.49
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):13.7
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1619; 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 Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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