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Northwest Africa 7993
Basic information Name: Northwest Africa 7993
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7993
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 575 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L6
Recommended:  L6    [explanation]

This is 1 of 11582 approved meteorites (plus 10 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 14 Oct 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7993 (NWA 7993)

(Northwest Africa)

Purchased: 2010

Classification: Ordinary chondrite (L6)

History: Purchased by Terry Boswell in 2010 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Rare chondrules. Olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa25.2-25.6), orthopyroxene (Fs21.0-21.7Wo1.7-1.8), clinopyroxene (Fs8.0-8.2Wo45.2-45.1).

Classification: Ordinary chondrite (L6).

Specimens: 21 g and one polished thin section are at UWB. The remainder is held by Mr. T. Boswell.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2010
Mass (g):575
Pieces:1
Class:L6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.2-25.6
Ferrosilite (mol%):21.0-21.7
Wollastonite (mol%):1.7-1.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:UWB
Main mass:T. Boswell
Comments:TB13-6; 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 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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