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Northwest Africa 176
Basic information Name: Northwest Africa 176
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 176
Observed fall: No
Year found: 1999
Country: (Northwest Africa)
Mass:help 2 kg
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Iron-ung
Meteoritical Bulletin:  MB 85  (2001)  Iron-ung
MetBase:  v. 7.1  (2006)  Iron-ung
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 126 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Writeuphelp
Writeup from MB 85:

Northwest Africa 176

Possibly near Morocco/Algeria Border

Found 1999

Iron meteorite with silicate inclusions (ungrouped)

A 2 kg stone was purchased in Morocco by Geoffrey Cintron. Classification and mineralogy (K. Keil, E. Scott and M. Liu, UHaw): a fresh iron with lightly shocked (S1) greenish-yellow polymineralic silicate inclusions (40 vol%) 1–10 mm in size; olivine, Fa11.4±0.3; orthopyroxene, En85.9±0.8Fs11.4±0.6Wo2.7±0.4; clinopyroxene, En51.8±1.9 Fs5.9±0.7Wo42.2±2.4; plagioclase, An49.9±2.7Ab46.5±2.2 Or3.6±0.7; weathering grade, W0. Metal composition (J. Wasson, UCLA): Co = 0.413 wt%, Ni = 8.66 wt%, Cu = 318 ppm, Ga = 17.7 ppm, Ge ≈160 ppm, As = 9.12 ppm, Ir = 3.56 ppm, Au = 0.853 ppm.  Oxygen isotopes (R. Clayton and T. Mayeda, UChi): silicate inclusions, δ17O = –6.5·, δ18O = –2.5·. Oxygen isotopes and bulk chemistry show that this is an ungrouped iron closely related to the Bocaiuva iron with silicate inclusions. Specimens: main mass with G. Cintron, 164 Scooter Lane, Hicksville, NY 11801, USA; type specimen, 68 g, UHaw.

Data from:
  MB85
  Table 4
  Line 90:
Origin or pseudonym:near Algerian border
Date:1999
Mass (g):2000
Pieces:1
Class:Iron Ung.
Plots: O isotopes:  
Institutions
   and collections
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
UHaw: Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, United States (institutional address; updated 25 Oct 2011)
Catalogs:
Search for this meteorite in the Natural History Museum collection (U.K.):   
    Require NHM photo
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Jay Piatek   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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