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Northwest Africa 12211
Basic information Name: Northwest Africa 12211
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12211
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 2.73 kg
Classification
  history:
Recommended:  H5    [explanation]

This is 1 of 9655 approved meteorites (plus 16 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Oct 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12211 (NWA 12211)

(Northwest Africa)

Purchased: 2018 Apr

Classification: Ordinary chondrite (H5)

History: Purchased by Thierry Simard in April 2018 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Sparse chondrules are present within a coarsely recrystallized assemblage containing abundant altered metal (some now replaced by red-brown iron hydroxides) and accessory merrillite.

Geochemistry: Olivine (Fa18.3-18.4, N = 3), orthopyroxene (Fs15.4-15.9Wo1.0-1.7, N = 4), clinopyroxene (Fs5.1-6.6Wo46.3-45.3, N = 2).

Classification: Ordinary chondrite (H5).

Specimens: 20.6 g including one polished thin section at UWB; remainder with Monsieur T. Simard.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018 Apr
Mass (g):2729
Pieces:1
Class:H5
Shock stage:S2
Weathering grade:W2/3
Fayalite (mol%):18.3-18.4
Ferrosilite (mol%):15.4-15.9
Wollastonite (mol%):1.0-1.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.6
Type spec location:UWB
Main mass:T. Simard
Comments:Work name TS18-1; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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