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Northwest Africa 7987
Basic information Name: Northwest Africa 7987
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7987
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 1377 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H4
Recommended:  H4    [explanation]

This is 1 of 6147 approved meteorites (plus 2 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 7987 (NWA 7987)

(Northwest Africa)

Purchased: 2013 Apr

Classification: Ordinary chondrite (H4)

History: Purchased by Steve Witt and S. Addi in April 2013 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Small, well-formed chondrules. Olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite, taenite and troilite.

Geochemistry: Olivine (Fa19.5-19.6), orthopyroxene (Fs16.5-16.7Wo0.7-0.8), clinopyroxene (Fs6.7-8.2Wo44.1-37.5).

Classification: Ordinary chondrite (H4).

Specimens: 38 g and one polished thin section are at UWB. The remainder is held jointly by Mr. S. Witt and Mr. S. Addi.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Apr
Mass (g):1377
Pieces:3
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):19.5-19.6
Ferrosilite (mol%):16.5-16.7
Wollastonite (mol%):0.7-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):38
Type spec location:UWB
Main mass:S. Witt
Comments:SW13-6; 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
David L. Ribeca   
Gabriel Gonçalves Silva   
Geography: 
Coordinates:Unknown.

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

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