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Northwest Africa 8230
Basic information Name: Northwest Africa 8230
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8230
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 127 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  H3
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 26 Jan 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 8230 (NWA 8230)

(Northwest Africa)

Purchased: 2013 Dec

Classification: Ordinary chondrite (H3)

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

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, relatively small chondrules (apparent diameter 500±300 µm) and relatively abundant altered metal. Minerals are olivine, orthopyroxene, augite, sodic plagioclase, altered kamacite, merrillite, chromite and troilite.

Geochemistry: Olivine (Fa11.1-23.8; N = 4; Cr2O3 in ferroan examples = 0.04 wt.%), orthopyroxene (Fs7.4-35.5Wo0.2-1.9, N = 3), augite (Fs7.3Wo41.7). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.12.

Classification: Ordinary chondrite (H3). Subtype estimated to be H3.8 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 Aaronson.

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:Temara
Date:P 2013 Dec
Mass (g):127
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):11.1-23.8
Ferrosilite (mol%):7.4-35.5
Wollastonite (mol%):0.2-1.9
Magnetic suscept.:5.12
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1659; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7027 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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