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Northwest Africa 6903
Basic information Name: Northwest Africa 6903
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6903
Observed fall: No
Year found: 2008
Country: Morocco
Mass:help 50 kg
Meteoritical Bulletin:  MB 100  (2012)  Iron, IIIAB 
Recommended:  Iron, IIIAB    [explanation]

This is 1 of 341 approved meteorites classified as Iron, IIIAB.   [show all]
Search for other: IIIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 2 Sep 2011
Writeup from MB 100:

Northwest Africa 6903 (NWA 6903)        32°22.3’N, 6°21.6’W

Centre, Morocco

Purchased: 2008

Classification: Iron meteorite (IIIAB)

History: Purchased near side of road near Khouribga, Morocco.

Physical characteristics: Heavy weathering around the perimeter and along a crack; near one edge oxidation penetrates about 1 cm into the interior, with kamacite largely replaced by oxides in fields of fine plessite.

Petrography: (J.T. Wasson, UCLA): Medium octahedrite, band-width 1.2 mm. Schreibersite is present in the interiors of larger kamacite bands; a typical size is 2 × 0.3 mm. No FeS was observed.

Geochemistry: Compositional data: Co 5.2 mg/g; Ni 84 mg/g; Ga 21.5 μg/g; Ge <50 μg/g; As 8.8 μg/g; Ir 0.22 μg/g; Au 1.09 μg/g. Data are the mean of duplicate determinations.

Classification: The meteorite is a member of IIIAB. Its composition is near the center of this largest group of irons. There is no compositional evidence of pairing. If compared to IIIABs with Au compositions between 1.04 and 1.14 mg/g there is only one other irons with Ir contents within 15% of that of this iron (Pozo Almonte). Thus, this is probably an independent fall.

Specimens: 318.7 g, UCLA; main mass, Aaronson

Data from:
  Table 1
  Line 1529:
Origin or pseudonym:Beni Mellal
Place of purchase:Khouribga
Date:P 2008
Mass (g):50000
Class:Iron, IIIAB
Classifier:J.T. Wasson, UCLA
Type spec mass (g):318.7
Type spec location:UCLA
Main mass:Aaronson
Comments:Submitted by Wasson J. T.
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
KD Meteorites   
Marcin Cimala      
Ryan Upchurch   

     Recommended::   (32° 22' 18"N, 6° 21' 36"W)

     This is 1 of 2 approved meteorites from Tadla-Azilal, Morocco
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)
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