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Northwest Africa 7948
Basic information Name: Northwest Africa 7948
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7948
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 59.8 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 157 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7948 (NWA 7948)

(Northwest Africa)

Purchased: 2013 Apr

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Eric Twelker in April 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh specimen composed of angular clasts (some lithic clasts up to 1.2 cm across, but mostly mineral fragments) in a finer grained, dark matrix. Minerals present are anorthite, olivine, pigeonite, subcalcic augite, Ti-chromite, troilite, rare silica polymorph and a shred-like grain of kamacite. A thin vesicular, glassy shock vein was found.

Geochemistry: Olivine (Fa37.8-61.2; FeO/MnO = 90-107), pigeonite (Fs27.1-28.1Wo13.3-11.0; FeO/MnO = 56-58), subcalcic augite (Fs17.1-22.3Wo35.9-29.9; FeO/MnO = 41-53), ferroan subcalcic augite (Fs44.0Wo39.4; FeO/MnO = 74), anorthite (An90.4-92.0Or0.3-0.4). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances of FeO 8.8 wt.%, and (in ppm) Sc 16, La 6.5, Sm 3.1, Eu 0.92, Yb 2.2, Th 1.0.

Classification: Lunar (mingled regolithic breccia).

Specimens: 12.2 g are at UWB. The remainder is with Twelker.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2013 Apr
Mass (g):59.8
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):37.8-61.2
Ferrosilite (mol%):27.1-28.1; 17.1-22.3
Wollastonite (mol%):13.3-11.0; 35.9-29.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.2
Type spec location:UWB
Main mass:E. Twelker
Comments:39.8; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Stefano De Fazi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6461 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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