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Northwest Africa 11090
Basic information Name: Northwest Africa 11090
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11090
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 955 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L6-melt breccia
Recommended:  L6-melt breccia    [explanation]

This is 1 of 46 approved meteorites classified as L6-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Feb 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11090 (NWA 11090)

Mauritania

Find: 2016

Classification: Ordinary chondrite (L6, melt breccia)

Physical characteristics: A dark dull stone without fusion crust. Cut surface reveals a brecciated texture, with chondrule-bearing clasts set in a dark matrix.

Petrography: Ordinary chondrite clasts (to cm) set in a melt matrix with microcrystalline quench texture and abundant FeS/metal droplets. Most clasts are equilibrated, with plagioclase size to 200 μm. Some clasts are shock darkened, with abundant troilite veinlets, larger plagioclase (to 300 μm), and large chromite grains (to 300 μm).

Geochemistry: Clasts: Olivine Fa24.8±0.02 (N=2), Orthopyroxene Fs20.5Wo0.7 (N=1). Shock darkened clasts: Olivine Fa24.3±0.05 (N=2), Orthopyroxene Fs21.0Wo1.4 (N=1). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.99.

Classification: L6 melt breccia

Specimens: 15 g and a polished section at CEREGE

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Nouakchott
Date:2016
Mass (g):955
Pieces:1
Class:L6-melt breccia
Weathering grade:W0
Fayalite (mol%):24.6±0.2 (N=4)
Ferrosilite (mol%):20.8±0.2 (N=2)
Wollastonite (mol%):1.0±0.4
Magnetic suscept.:4.99
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):22.3
Type spec location:CEREGE
Main mass:anonymous
Comments:work name IK955; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
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:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 114 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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