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Northwest Africa 11289
Basic information Name: Northwest Africa 11289
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11289
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 4.6 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  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 28 Jun 2017
Revised 16 Jun 2018: Reclassified by Wasson
Writeuphelp
Writeup from MB 107:
Reclassification of Northwest Africa11289

The NWA 11289 iron meteorite is reclassified as IIIAB instead of IIIE based on new INAA data, measured by J.T. Wasson, UCLA. A major concern for classification was Co, now measured at 5.48 ppm by INAA, vs. 4.6 ppm by ICPMS, which led to the initial classification. With the revised data, NWA 11289 fits IIIAB trends well, especially Ni, Cu, Ga, As, Pt, Ir, and Au.

Writeup from MB 106:

Northwest Africa 11289 (NWA 11289)

Morocco

Purchased: 2012 Oct

Classification: Iron meteorite (IIIE)

History: The meteorite was purchased in Temara from a dealer who bought it in Beni Melal.

Petrography: (A. Bouvier, UWO) Weathered interior, medium octaedrite texture. No inclusions were observed in the repository specimen. Rust formed during storage, after it was cut 4 to 5 years before classification.

Geochemistry: (A. Bouvier, UWO) Elemental composition in wt%: Ni = 9.7, Co=0.46; and in ppm: Cr=3.8, Cu=131.1, Ga=21.7, As=13.8, W=0.53, Pt=3.2, Ir=0.076 and Au=1.6.

Classification: Iron, IIIE based on Ir, Co, Ga, and Au abundances (Malvin et al., 1984).

Specimens: One slice of 93 g at UWO.

Bibliography:
  • Malvin D.J., Wang D., and Wasson J.T. (1984) Chemical classification of iron meteorites—X. Multielement studies of 43 irons, resolution of group IIIE from IIIAB, and evaluation of Cu as a taxonomic parameter. Geochim. Cosmochim. Acta 48, 785-804. (link)
Data from:
  MB106
  Table 0
  Line 0:
Origin or pseudonym:50 km east of Azilal
Place of purchase:Temara
Date:P 2012 Oct
Mass (g):4.6 kg
Pieces:1
Class:Iron, IIIE
Weathering grade:Medium
Classifier:A. Bouvier, UWO
Type spec mass (g):93.0
Type spec location:UWO
Main mass:A. Aaronson
Finder:Unknown
Comments:Submitted by A. Bouvier, UWO
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)
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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.
Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
KD Meteorites   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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