header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 12 Mar 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 12269
Basic information Name: Northwest Africa 12269
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12269
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1679 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 183 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 11 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12269 (NWA 12269)

(Northwest Africa)

Purchased: 2018 Jul

Classification: Martian meteorite (Shergottite)

History: Purchased in Ouarzazate, Morocco by Mohamed Aid in July 2018.

Petrography: (A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL) Relatively fine grained with intersertal texture. Composed predominantly of zoned clinopyroxene and maskelynite (some exhibiting a curved, narrow lath-like habit) with accessory fine grained intergrowths of hedenbergite+fayalite+silica, Fe-Ti oxides, merrillite and pyrrhotite.

Geochemistry: Subcalcic augite (Fs24.8-41.8Wo31.4-24.3, FeO/MnO = 30-33, N = 3), ferropigeonite (Fs66.9-73.0Wo16.6-16.5, FeO/MnO = 41-43, N = 2), maskelynite (An51.9-53.1Or1.3-1.2, N = 2).

Classification: Martian (shergottite, fine-intersertal)

Specimens: 20.5 g including one polished thin section at UWB; remainder with Mr. Aaronson.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2018 Jul
Mass (g):1679
Pieces:1
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):24.8-41.8
Wollastonite (mol%):31.4-24.3
Classifier:A. Irving, P. Carpenter, and S. Kuehner, UWS
Type spec mass (g):20.5
Type spec location:UWB
Main mass:Aaronson
Comments:Work name MA18-201; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 6672 approved meteorites from (Northwest Africa) (plus 2024 unapproved names)

Direct link to this page