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Northwest Africa 7954
Basic information Name: Northwest Africa 7954
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7954
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 109.6 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7954 (NWA 7954)

(Northwest Africa)

Purchased: 2013 Apr

Classification: HED achondrite (Eucrite, monomict)

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

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh fragmental breccia composed mainly of angular crystal fragments of exsolved pigeonite and calcic plagioclase with accessory ilmenite, chromite and troilite. Additionally, there are sparse related basaltic eucrite clasts, plus some coarser mineral clasts derived from gabbroic eucrite protoliths.

Geochemistry: Host orthopyroxene (Fs57.4-58.5Wo1.8-1.9; FeO/MnO = 31-34), clinopyroxene exsolution lamellae (Fs29.3Wo36.3; FeO/MnO = 32).

Classification: Eucrite (monomict).

Specimens: 22.9 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):109.6
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):57.4-58.5; 29.3
Wollastonite (mol%):1.8-1.9; 36.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.9
Type spec location:UWB
Main mass:S. Witt
Comments:SW13-1; 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)
Michael S. Scherman   
Steve Witt   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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