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Northwest Africa 8427
Basic information Name: Northwest Africa 8427
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8427
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 969 g
Meteoritical Bulletin:  MB 104  (2015)  CO3
Recommended:  CO3    [explanation]

This is 1 of 573 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 9 Mar 2015
Writeup from MB 104:

Northwest Africa 8427 (NWA 8427)

(Northwest Africa)

Purchased: 2014 Mar

Classification: Carbonaceous chondrite (CO3)

History: Purchased in Temara, Morocco by Adam Aaronson in March 2014.

Petrography: (A. Irving and S. Kuehner, UWS) Fairly closely-packed chondrules and sparse, very small, fine grained CAI are set in a fine grained orange matrix.

Geochemistry: Olivine (Fa0.7-40.6; Cr2O3 in ferroan olivine = 0.06-0.68 wt.%, mean 0.16±0.20 wt.%, N = 10), orthopyroxene (Fs2.1-41.8Wo1.1-1.3, N = 3), subcalcic augite (Fs5.9Wo36.8), augite (Fs35.6Wo42.8).

Classification: Carbonaceous chondrite (CO3).

Specimens: 22 g including one polished thin section at UWB. The remaining material is held by Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2014 Mar
Mass (g):969
Shock stage:S2
Weathering grade:low
Fayalite (mol%):0.7-40.6
Ferrosilite (mol%):2.1-41.8
Wollastonite (mol%):1.1-1.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1695; 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 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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