1.46g Eucrite breccia | NWA 11191 Parcial Slice Meteorite | Collector's Specimen
|Northwest Africa 11191|
Name: Northwest Africa 11191
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11191
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 100 g
This is 1 of 139 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
|Comments:||Approved 10 Apr 2017|
Writeup from MB 106:
Northwest Africa 11191 (NWA 11191)
Classification: HED achondrite (Eucrite, brecciated)
History: Purchased by Dustin Dickens in 2016 from Moroccan dealer.
Petrography: (A. Irving and S. Kuehner, UWS) Gabbroic eucrite clasts and related debris are set in a very fine grained, partly vitric and vesicular quenched matrix. The major minerals are pigeonite (pale orange in thin section; some exsolved and some unexsolved) and polycrystallline calcic plagioclase, together with accessory silica polymorph, ilmenite, Ti-chromite, Cr-rich chromite, zircon, troilite and barite.
Geochemistry: Orthopyroxene host (Fs59.1-62.3Wo4.1-2.2, FeO/MnO = 32-33, N = 2), clinopyroxene exsolution lamellae (Fs27.0-27.9Wo43.3-42.5, FeO/MnO = 32-35, N = 2), plagioclase (An89.9-90.7Or1.4-0.4, N = 2).
Classification: Eucrite breccia (gabbroic, shock melted).
Specimens: 21 g including one polished thin section at UWB; remainder with Mr. D. Dickens.
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)
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