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Northwest Africa 8303
Basic information Name: Northwest Africa 8303
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8303
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 916 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  L3
Recommended:  L3    [explanation]

This is 1 of 709 approved meteorites 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
Writeuphelp
Writeup from MB 104:

Northwest Africa 8303 (NWA 8303)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (L3)

History: Purchased by Marcin Cimała in February 2013 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Closely-packed, medium sized, well-formed chondrules (most 0.6-2.8 mm, some up to 4 mm, mean 1.8±1.2mm). Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, altered kamacite, troilite and chromite.

Geochemistry: Olivine (Fa3.9-32.7, N = 10; Cr2O3 content of ferroan olivine = 0.02±0.02 wt.%, N = 8), orthopyroxene (Fs2.5-8.7Wo0.3-0.5, N = 3), clinopyroxene (Fs3.3-5.2Wo41.9-46.0)

Classification: Ordinary chondrite L3. Estimation of subtype 3.6 based on histograms of Cr2O3 distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 20.2 g including one polished thin section at UWB. The remainder is held by M. Cimała.

Bibliography:
  • 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:
  MB104
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2013 Feb
Mass (g):916
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):3.9-32.7
Ferrosilite (mol%):2.5-8.7
Wollastonite (mol%):0.3-0.5
Magnetic suscept.:4.62
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:M. Cimala
Comments:MC100; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Woreczko Jan & Wadi      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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