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Northwest Africa 7958
Basic information Name: Northwest Africa 7958
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7958
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 48.3 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7958 (NWA 7958)

(Northwest Africa)

Purchased: 2013 Apr

Classification: HED achondrite (Eucrite)

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

Petrography: (A. Irving and S. Kuehner, UWS) Unbrecciated but somewhat shocked specimen containing cross-cutting, thin, glassy veinlets. Intersertal assemblage of exsolved pigeonite, calcic plagioclase (exhibiting irregular, patchy birefringence), silica, ilmenite, troilite and tiny grains of zircon.

Geochemistry: Host orthopyroxene (Fs61.8-61.9Wo 1.9-3.2; FeO/MnO = 32-33), clinopyroxene exsolution lamellae (Fs26.0-26.3Wo44.3; FeO/MnO = 30-31).

Classification: Eucrite (basaltic).

Specimens: 10.6 g and one polished thin section are at UWB. The remainder is held by Mr. S. Witt.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Apr
Mass (g):48.3
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):61.8-61.9; 26.0-26.3
Wollastonite (mol%):1.9-3.2; 44.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):10.6
Type spec location:UWB
Main mass:S. Witt
Comments:SW13-5; 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 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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