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Northwest Africa 7998
Basic information Name: Northwest Africa 7998
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7998
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 59 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L5
Recommended:  L5    [explanation]

This is 1 of 6664 approved meteorites (plus 4 unapproved names) classified as L5.   [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 7998 (NWA 7998)

(Northwest Africa)

Purchased: 2013 May

Classification: Ordinary chondrite (L5)

History: Purchased by Aaronson in Temara, Morocco in May 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Medium-sized chondrules. Olivine, orthopyroxene, augite, sodic plagioclase, altered kamacite, chromite and troilite. Some thin cross-cutting shock veinlets.

Geochemistry: Olivine (Fa26.7-26.8), orthopyroxene (Fs21.7-23.4Wo1.4-1.0), augite (Fs8.3-9.3Wo44.8-45.5).

Classification: Ordinary chondrite (L5).

Specimens: 30 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:Temara
Date:P 2013 May
Mass (g):59000
Pieces:many
Class:L5
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):26.7-26.8
Ferrosilite (mol%):21.7-23.4
Wollastonite (mol%):1.4-1.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):30
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1540; 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Denis gourgues   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7187 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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