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Northwest Africa 8218
Basic information Name: Northwest Africa 8218
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8218
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 68 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CK4
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 27 Jan 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8218 (NWA 8218)

(Northwest Africa)

Purchased: 2013 Dec

Classification: Carbonaceous chondrite (CK4)

History: Purchased in Temara, Morocco by A. Aaronson in December 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Unaltered specimen composed of separated, granular chondrules (mean 1.4±0.6mm; containing abundant magnetite) in a recrystallized matrix. Minerals are olivine, orthopyroxene, subcalcic augite, augite, intermediate plagioclase, Cr-bearing magnetite, Ti-Cr-Al-bearing spinel, pentlandite and Co-Ni-Fe sulfide (some in intergrowths with ferroan olivine and magnetite).

Geochemistry: Olivine (Fa32.2-32.7, FeO/MnO = 108-116, N = 3), orthopyroxene (Fs26.4Wo0.7, N = 3), subcalcic augite (Fs17.6Wo23.8), augite (Fs10.6-12.3Wo48.0-45.8).

Classification: Carbonaceous chondrite (CK4).

Specimens: 13.6 g including one polished thin section at UWB. The remaining material is held by Aaronson.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 Dec
Mass (g):68
Pieces:9
Class:CK4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):32.2-32.7
Ferrosilite (mol%):26.4
Wollastonite (mol%):0.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):13.6
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1628; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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