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Northwest Africa 11853
Basic information Name: Northwest Africa 11853
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11853
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 270 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 175 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11853 (NWA 11853)

(Northwest Africa)

Purchased: 2011 Apr

Classification: Mesosiderite

History: Purchased by Alexandre Debienne in April 2011 from a dealer in Agadir, Morocco.

Physical characteristics: A batch of identical brownish stones (total weight 270 g).

Petrography: (A. Irving and S. Kuehner, UWS) Relatively coarse-grained aggregate of compositionally zoned orthopyroxene, calcic plagioclase, troilite and abundant altered kamacite.

Geochemistry: Orthopyroxene (Fs15.8Wo1.1, FeO/MnO = 33; Fs24.7Wo2.7, FeO/MnO = 27; Fs46.6Wo2.8, FeO/MnO = 31, N = 3).

Classification: Mesosiderite.

Specimens: A 21 g stone polished on one side is at PSF. The remaining material is held by Mr. A. Debienne.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2011 Apr
Mass (g):270
Pieces:many
Class:Mesosiderite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):15.8; 24.7; 46.6
Wollastonite (mol%):1.1; 2.7; 2.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:PSF
Main mass:A. Debienne
Comments:Submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6423 approved meteorites from (Northwest Africa) (plus 2023 unapproved names)

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