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Northwest Africa 791
Basic information Name: Northwest Africa 791
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 791
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 20.96 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  L5
Recommended:  L5    [explanation]

This is 1 of 6382 approved meteorites (plus 3 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 17 Dec 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 791 (NWA 791)

(Northwest Africa)

Purchased: 2001 Mar

Classification: Ordinary chondrite (L5)

History: Purchased by Michael Farmer in March 2001 from a dealer in Casablanca, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Sparse chondrules occur in a recrystallized matrix containing stained metal.

Geochemistry: Olivine (Fa25.5-25.8, N = 3), orthopyroxene (Fs20.5-20.7Wo1.4-1.6, N = 3), clinopyroxene (Fs7.4-8.3Wo44.9-44.3, N = 2).

Classification: Ordinary chondrite (L6).

Specimens: 146.7 g including one polished thin section at PSF; 226 g at UCLA; remainder is held by MFarmer.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Casablanca
Date:P 2001 Mar
Mass (g):20961
Pieces:80
Class:L5
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):25.5-25.8
Ferrosilite (mol%):20.5-20.7
Wollastonite (mol%):1.4-1.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):372.7
Type spec location:PSF/UCLA
Main mass:MFarmer
Comments:Submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Wayne Harrigan   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer   
Argus Rocks   
David Hardy   
David L. Ribeca   
Edward Krikorian   
George Barclay   
Gerald Armstrong      
Jean-Michel Masson   
Jim K   
John A. Shea   
max   
METEORITICON         
Michael S. Scherman   
Mike Smith   
Phil Schmitz         
Piotr gural100   
Robert Zdancewicz   
rockmeamadeus   
The Wilcox Collection of Meteorites   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6729 approved meteorites from (Northwest Africa) (plus 2025 unapproved names)

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