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Northwest Africa 7335
Basic information Name: Northwest Africa 7335
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7335
Observed fall: No
Year found: 2009
Country: Morocco
Mass:help 4.91 kg
Meteoritical Bulletin:  MB 101  (2012)  Iron, ungrouped
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 152 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Comments: Approved 23 Aug 2012
Writeup from MB 101:

Northwest Africa 7335 (NWA 7335)


Purchased: March 2009

Classification: Iron meteorite (ungrouped)

History: A single specimen was purchased in March 2009 by Andreas Gren from a Moroccan dealer in Rissani.

Physical characteristics: The 4908 g mass is shaped like a loaf of bread, with typical rusty desert weathering. One weathered edge shows Widmanstätten pattern.

Petrography: (P. Strickland and C. Herd, UAb) Cut and polished sections display 3 prominent lamellae directions. Two are at 60° intersection angles with a unique 70° intersection angle. The lamellae producing the Widmanstätten pattern have an average bandwidth of 0.6±0.2 mm, indicative of a medium octahedrite. Upon closer examination however, these lamellae are composed of multiple tiny spindles (<0.2 mm width) that are roughly parallel to each other. The spindles can also be seen in the plessite matrix displaying an octahedrite arrangement on a much finer scale, similar to that of a plessitic octahedrite.

Geochemistry: (C. Herd and G. Chen, UAb) Ni=109.8, Co=8.40 (both mg/g); Cr=21, Cu=229, Ga=50.8, Ge=41.2, As=8.66, W=3.67, Ir=12.3, Pt=26.3, Au=1.73 (all μg/g); Sb=210 (ng/g). Obtained by ICP-MS using North Chile as a calibration standard.

Classification: Ungrouped, plessitic octahedrite. Although Ni content is similar to IB, IIC, and IIIAB groups, Ga and Ir concentrations are outside limits for these groups. The texture shows characteristics of both medium and plessitic octahedrites.

Specimens: Two polished and etched specimens (151.1 and 7.7 g) and a 25 g analytical specimen at UAb. Remainder with Gren.

Data from:
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P March 2009
Mass (g):4908
Class:Iron, ungrouped
Shock stage:low
Weathering grade:low
Classifier:C. Herd and P. Strickland, UAb
Type spec mass (g):192.7
Type spec location:UAb
Main mass:A. Gren
Comments:Submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Gren: Andreas Gren, Hamburg, Germany (private address)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Gregor H.         


     This is 1 of 2089 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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