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Northwest Africa 11353
Basic information Name: Northwest Africa 11353
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11353
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 739 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CR2
Recommended:  CR2    [explanation]

This is 1 of 187 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 4 Sep 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11353 (NWA 11353)

Morocco

Purchased: Feb. 2017

Classification: Carbonaceous chondrite (CR2)

History: Purchased by Ke Zuokai in Feb. 2017 from a Moroccan dealer.

Physical characteristics: The meteorite has a black fusion crust. Chondrules and clasts ranging from white to dark gray are visible.

Petrography: The thin section shows abundant well-defined FeNi-metal rich chondrules (0.1 to 1.9 mm) with porphyritic textures. Most chondrules are magnesian (type I) with a few being type II. The matrix is fine-grained silicates, phyllosilicates and FeNi metal. Mineral and chondrule clasts are also present. Metal grains up to ~500 μm are observed in chondrules and in the matrix. A small fragment of CAI was identified composed of Al, Ca-rich pyroxene and anorthite.

Geochemistry: Silicates are unequilibrated. Olivine Fa6.0±6.8, PMD=80.3%, n=44 (Fa0.7-31.0, mostly Fa0.7-5), rich in Cr2O3 (0.19-0.82 wt%, average=0.55 wt%); low-Ca pyroxene Fs1.9-14.5Wo0-2.6 (Fs7.3±4.9Wo1.1±0.7, Fs PMD=58.3%, n=18); minor Ca-rich pyroxene Fs1.9-7.4Wo30.6-42.9; Plagioclase are Ca-rich Ab0-15.5An84.5-100 (Ab6.6±5.5An93.4±5.5, n=6).

Classification: CR2 classification based on composition, altered matrix and abundant FeNi metals.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Beijing China
Date:P Feb. 2017
Mass (g):738.5
Pieces:1
Class:CR2
Shock stage:Moderate
Weathering grade:W2
Fayalite (mol%):6.0±6.8 (n=44)
Ferrosilite (mol%):7.3±4.9 (n=18); 4.1±2.0 (n=8)
Wollastonite (mol%):1.1±0.7 (n=18); 35.8±4.2 (n=8)
Classifier:Wu Y., PMO
Type spec mass (g):29
Type spec location:PMO
Main mass:Ke Zuokai
Comments:Submitted by Hsu W.
Institutions
   and collections		 PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
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:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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