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Northwest Africa 8355
Basic information Name: Northwest Africa 8355
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8355
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 680 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  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 26 Jan 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 8355 (NWA 8355)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Ordinary chondrite (L3)

History: Purchased by Marcin Cimała in February 2014 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Closely-packed, medium-sized (apparent diameter 600±200 μm), well-formed chondrules. Minerals are olivine, orthopyroxene, subcalcic augite, sodic plagioclase, altered kamacite, troilite, chromite and taenite.

Geochemistry: Olivine (Fa15.8-25.5, N = 5; Cr2O3 content of ferroan olivine <0.02 wt.%), orthopyroxene (Fs11.9-35.4Wo0.4-4.3, N = 3), subcalcic augite (Fs11.0-26.6Wo34.8-27.0, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.65.

Classification: Ordinary chondrite (L3). Subtype estimated to be L3.8 based on the limited range in fayalite content of olivine and paucity of Cr2O3 in ferroan olivine (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:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014 Feb
Mass (g):680
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):15.8-25.5
Ferrosilite (mol%):11.9-35.4
Wollastonite (mol%):0.4-4.3
Magnetic suscept.:4.65
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:M. Cimala
Comments:MC115; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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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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