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Northwest Africa 11086
Basic information Name: Northwest Africa 11086
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11086
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 373 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CM-an
Recommended:  CM-an    [explanation]

This is 1 of 10 approved meteorites classified as CM-an.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 26 Feb 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11086 (NWA 11086)

Morocco

Find: 2016 May

Classification: Carbonaceous chondrite (CM, anomalous)

History: Reportedly found near Foum Zguid, Morocco.

Physical characteristics: Dark brown stones. Cut surface reveals a lighter brown interior with small chondrules.

Petrography: Well delineated chondrules set in a iron-rich fine grained matrix. Matrix 58 vol%, chondrules and chondrule fragments 42 vol% (from point counting, N=293). Average apparent chondrule diameter 240±120 μm (N=38). Rare metal as ~1 μm spherical inclusions in silicates. X-ray diffraction does not reveal the presence of phyllosilicates.

Geochemistry: Olivine Fa0.9-32.7, average Fa14.2±12.2, PMD 81%, FeO/MnO = 79 (N=13), Cr2O3 on ferroan olivine 0.36±0.09 wt% (N=10). Orthopyroxene Fs1.4±0.1Wo1.1±0.1 (N=2). Oxygen isotopic composition (J. Gattacceca, C. Sonzogni, CEREGE) from analysis of one acid-washed 1.5 mg aliquot of a powdered homogenized 475 mg bulk sample is δ17O=-0.40‰, δ18O=6.17‰ , Δ17O=-3.63‰ (linearized, slope 0.5247, analytical uncertainties 0.08‰, 0.12‰, 0.03‰ respectively). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.41.

Classification: Carbonaceous chondrite (CM-an). Severe weathering.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Zagora
Date:2016 May
Mass (g):373
Pieces:several
Class:CM-an
Weathering grade:Severe
Fayalite (mol%):14.2±12.2 (N=13)
Ferrosilite (mol%):1.4±0.1 (N=2)
Wollastonite (mol%):1.1±0.1
Magnetic suscept.:3.41
Classifier:J. Gattacceca, B. Devouard, CEREGE
Type spec mass (g):22.64
Type spec location:CEREGE
Main mass:Fabien Kuntz and Pierre-Marie Pelé
Comments:work name K313; submitted by Jérôme Gattacceca
Plots: O isotopes:  
Institutions
   and collections		 CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
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 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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