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Northwest Africa 788
Basic information Name: Northwest Africa 788
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 788
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 12.93 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L5/6
Recommended:  L5/6    [explanation]

This is 1 of 175 approved meteorites classified as L5/6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Oct 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 788 (NWA 788)

(Northwest Africa)

Purchased: 2001 Mar

Classification: Ordinary chondrite (L5/6)

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

Petrography: (A. Irving and S. Kuehner, UWS; A. Rubin, UCLA) Some well-formed chondrules occur within a recrystallized matrix containing altered metal and merrillite. An exotic ellipsoidal clast (1.7 mm long) in the studied thin section is composed of labradorite containing myriad, oriented inclusions of Cr-pleonaste and ilmenite with accessory baddeleyite and troilite; this is mantled by a reaction rim against the matrix composed mainly of sodic plagioclase wth minor olivine and kamacite.

Geochemistry: Olivine (Fa25.0-25.8, N = 3), orthopyroxene (Fs21.1-22.1Wo1.7-1.6; N = 2), clinopyroxene (Fs7.7-9.8Wo44.4-44.0, N = 2), plagioclase in ellipsoidal clast (An58.9Or0.7), plagioclase in reaction rim on clast (An11.0Or5.5).

Classification: Ordinary chondrite (L5/6). An unusual feature of this specimen is the presence of an exotic plagioclase-rich object containing oriented grains of oxide phases.

Specimens: 190 g including one polished thin section at UCLA; 203.7 g at PSF; remainder with MFarmer.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Casablanca
Date:P 2001 Mar
Mass (g):12930
Pieces:many
Class:L5/6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.0-25.8
Ferrosilite (mol%):21.2-22.1
Wollastonite (mol%):1.7-1.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):190
Type spec location:UCLA
Main mass:M. Farmer
Comments:UCLA specimen #1109; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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)
Andreas Uecker   
boborit   
Brice D. Hornback   
Claudiu Popa   
eraserhead   
Jean-Michel Masson   
John A. Shea   
Jörg-Florian Jensch   
MeteoriteCollector.org - FCOM - Russ Finney   
METEORITES AUSTRALIA   
Michael Hofmann   
Mirko Graul         
Phil Schmitz      
Robert Zdancewicz   
tett   
The Wilcox Collection of Meteorites   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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