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Northwest Africa 7834
Basic information Name: Northwest Africa 7834
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7834
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 905 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 344 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 7834 (NWA 7834)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased jointly by Darryl Pitt and David Gheesling in February 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of numerous mineral fragments and rare ophitic-textured mare basalt clasts in a vesicular, glassy matrix. Minerals are anorthite, olivine, unexsolved pigeonite, subcalcic augite, exsolved pigeonite, Ti-bearing chromite, Cr-bearing ulvöspinel, ilmenite, troilite, minor silica polymorph and tiny shred-like grains of kamacite.

Geochemistry: Olivine (Fa32.3, FeO/MnO = 93; Fa92.9, FeO/MnO = 83), pigeonite (Fs28.8-35.4Wo9.9-5.7; FeO/MnO = 52-56), subcalcic augite (Fs18.0Wo37.9; FeO/MnO = 46). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances of FeO 12.9 wt.%, and (in ppm) Sc 25, La 6.4, Sm 3.1, Eu 0.81, Yb 2.3, Th 0.9.

Classification: Lunar (mingled regolithic breccia).

Specimens: 20.2 g are at UWB. The remainder is with the owners.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2013 Feb
Mass (g):905
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):32.3; 92.9
Ferrosilite (mol%):28.8-35.4
Wollastonite (mol%):9.9-5.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWB
Main mass:D. Pitt and D. Gheesling
Comments:29.1; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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)
Antonello Petriccione   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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