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Northwest Africa 7996
Basic information Name: Northwest Africa 7996
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7996
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 675 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H4
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 14 Oct 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7996 (NWA 7996)

(Northwest Africa)

Purchased: 2011

Classification: Ordinary chondrite (H4)

History: Purchased by Terry Boswell in 2011 from a dealer in Midelt, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, small chondrules and fairly abundant metal. Olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa18.9-19.0), orthopyroxene (Fs15.9-16.4Wo1.1-1.5), clinopyroxene (Fs5.5-5.9Wo45.6-45.7).

Classification: Ordinary chondrite (H4).

Specimens: 20.2 g and one polished thin section are at UWB. The remainder is held by Aaronson.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Midelt
Date:P 2011
Mass (g):675
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):18.9-19.0
Ferrosilite (mol%):15.9-16.4
Wollastonite (mol%):1.1-1.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:T. Boswell
Comments:TB13-9; 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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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