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Northwest Africa 8178
Basic information Name: Northwest Africa 8178
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8178
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 397 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 522 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 14 Feb 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8178 (NWA 8178)

(Northwest Africa)

Purchased: 2013 Dec

Classification: HED achondrite (Diogenite)

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

Petrography: (A. Irving and S. Kuehner, UWS) Matrix-poor breccia composed of closely-packed, angular, mostly monomineralic clasts of orthopyroxene with ~5 vol.% olivine, clinopyroxene, chromite and troilite.

Geochemistry: Orthopyroxene (Fs23.4-25.0Wo2.3-2.4; FeO/MnO = 29), olivine (Fa32.9-33.3; FeO/MnO = 46-49), clinopyroxene (Fs9.9-10.3Wo43.8; FeO/MnO = 21-25).

Classification: Diogenite (monomict breccia).

Specimens: 20.1 g including a polished thin section at UWB. The remainder is held by Aaronson.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 Dec
Mass (g):397
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Fayalite (mol%):32.9-33.3
Ferrosilite (mol%):23.4-25.0
Wollastonite (mol%):2.3-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1604; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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