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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
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Iron, IIIAB 
Recommended:  Iron, IIIAB    [explanation]

This is 1 of 311 approved meteorites classified as Iron, IIIAB.   [show all]
Search for other: IIIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 2 Sep 2011
Writeuphelp
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:
  MB100
  Table 1
  Line 1529:
State/Prov/County:Centre
Origin or pseudonym:Beni Mellal
Place of purchase:Khouribga
Date:P 2008
Latitude:32°22.3'N
Longitude:6°21.6'W
Mass (g):50000
Pieces:1
Class:Iron, IIIAB
Classifier:J.T. Wasson, UCLA
Type spec mass (g):318.7
Type spec location:UCLA
Main mass:Aaronson
Finder:unknown
Comments:Submitted by Wasson J. T.
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos:
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KD Meteorites   
Geography:

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

Statistics:
     This is 1 of 2 approved meteorites from Tadla-Azilal, Morocco
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)
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