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Northwest Africa 11355
Basic information Name: Northwest Africa 11355
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11355
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 5 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L6
Recommended:  L6    [explanation]

This is 1 of 12071 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Jun 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11355 (NWA 11355)

Morocco

Purchased: Feb. 2017

Classification: Ordinary chondrite (L6)

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

Physical characteristics: The meteorite has a yellow weathered surface.

Petrography: The section shows chondrules (0.4-1 mm, one large chondrule up to 2.6 mm) with vague boundaries. The matrix experienced extensive recrystallization (30 to 300 μm) with a few regions in the matrix show triple junctions. Plagioclase grains size up to ~80 μm. Chromite, troilite, metal and phosphate are also present. Fractures are widespread in this thin section. Shock melt veins are present.

Geochemistry: Silicates are equilibrated. Olivine Fa22.8-25.1 (Fa23.8±0.7, PMD=2.2%, n=18); low-Ca pyroxene Fs19.2-21.6Wo0-1.5 (Fs20.0±0.8Wo1.0±0.4, Fs PMD=3.0%, n=15); minor Ca-rich pyroxene Fs6.9-18.5Wo37.9-44.3; plagioclase Ab79.8-86.9Or4.0-10.4 (Ab83.5±1.9Or6.3±1.7, n=14).

Classification: L6 classification based on homogenized composition, recrystallizied matrix and regional triple junctions.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Beijing China
Date:P Feb. 2017
Mass (g):5000
Pieces:1
Class:L6
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):23.8±0.7 (n=18)
Ferrosilite (mol%):20.0±0.8 (n=15); 10.4±5.5 (n=4)
Wollastonite (mol%):1.0±0.4 (n=15); 42.4±3.0 (n=4)
Classifier:Wu Y., PMO
Type spec mass (g):24
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 1852 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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