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Northwest Africa 11180
Basic information Name: Northwest Africa 11180
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11180
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 37.5 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 11180 (NWA 11180)

Morocco

Purchased: 2015

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: 5 samples of meteorite and their fragments weighing 37.45 g. The samples have dark-brown fusion crust.

Petrography: (M. A. Ivanova, Vernad): The meteorite consists of the olivine aggregates, POP and BO chondrules and their fragments, with a fine-grained matrix rim of isolated grains of olivine and pyroxene, and refractory inclusions. These objects are embedded in the phyllosilicate matrix. Main minerals are olivine and pyroxene; minor minerals are spinel, sulfides, Fe,Ni-metal, chromite, and tochilinite.

Geochemistry: Mineral compositions and geochemistry (EMPA, Vernad): Olivine (n=66): Fa0.37-69.4, CaO 0.27 wt.%, Cr2O3 0.37 wt.%. Orthopyroxene Fs0.8-3.9Wo0.2-3.8, pigeonite Fs1.0Wo17.7, augite Fs0.8-14Wo31.3-46.6, and diopside Fs1.3Wo57.9.

Classification: carbonaceous chondrite, CM2

Specimens: 4 samples with their fragments (2.6+0.48+0.07+2.6+0.5+0.7+1.4 g) of 8.35 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):37.45
Pieces:5
Class:CM2
Classifier:M. A. Ivanova, Vernad
Type spec mass (g):8.35
Type spec location:Vernad.
Main mass:anonymous owner
Comments:Submitted by M. A. Ivanova
Institutions
   and collections
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.
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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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