Martian Meteorite SHERGOTTITE 7.533 gram slice I NWA 12269
|Northwest Africa 12269|
Name: Northwest Africa 12269
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12269
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 1679 g
This is 1 of 195 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite). [show all]
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|Comments:||Approved 11 Dec 2018|
Writeup from MB 107:
Northwest Africa 12269 (NWA 12269)
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.
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