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Northwest Africa 11179
Basic information Name: Northwest Africa 11179
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11179
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 338 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CM2
Recommended:  CM2    [explanation]

This is 1 of 541 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 14 Mar 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11179 (NWA 11179)

Morocco

Purchased: 2015

Classification: Carbonaceous chondrite (CM2)

History: the meteorite was purchased in the Tucson Mineral Show, January 2015 from a Moroccan meteorite dealer

Physical characteristics: 25 samples of meteorite and their fragments weighing 337.6 g. The samples have dark-brown fusion crust, a surface of section has a gray-greenish color.

Petrography: (M. A. Ivanova, Vernad): The meteorite consists of the altered matrix, POP, rare BO chondrules and their fragments, olivine aggregates with a fine-grained matrix rim around, and refractory inclusions. Main minerals are olivine and pyroxene; minor minerals are very rare sulfides, Fe,Ni-metal and chromite. The phyllosilicate matrix contains isolated grains of olivine and pyroxene. The meteorite is weathered, only rare kamacite, taenite and sulfide were preserved.

Geochemistry: Mineral compositions and geochemistry (EMPA, Vernad): Olivine: Fa0.3-68.4, CaO 0.28 wt.%, Cr2O3 0.31 wt.% (n=45). Orthopyroxene Fs0.8-3.9Wo0.2-3.8 (n=18), augite Fs0.8-2.8Wo31.3-46.6 (n=7), pigeonite Fs14.3Wo20.2, and diopside Fs1.3Wo57.9. Oxygen isotopes (Laser fluorination, OU): δ17O 0.721, δ18O 7.901, Δ17O -3.388; δ17O 0.585, δ18O 7.796, Δ17O -3.469 per mil.

Classification: carbonaceous chondrite, CM2

Specimens: 15 samples with their fragments of the meteorite (4.7+5.4+4.6+2.3+0.3+0.07+ 1.9+0.3+0.06+0.9+0.1+ 1.2+3.3+0.5+0.8+4+0.7+2.2+ 2.6+0.4+1.44+1.03+1.65+0.281 g) of 40.7 g in total and a polished section are located at Vernad, the main mass with anonymous owner.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Tucson, USA
Date:P 2015
Mass (g):337.6
Pieces:25
Class:CM2
Classifier:M. A. Ivanova, Vernad
Type spec mass (g):40.73
Type spec location:Vernad.
Main mass:anonymous owner
Comments:Submitted by M. A. Ivanova
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
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.
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Cosimo Damiano Gorgoglione   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1505 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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