|Northwest Africa 11259|
|Basic information||Name: Northwest Africa 11259|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11259
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 468 g
This is 1 of 293 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
|Comments:||Approved 9 Jun 2017|
Writeup from MB 106:
Northwest Africa 11259 (NWA 11259)
Classification: HED achondrite (Eucrite, polymict)
History: Purchased by Ken Regelman in 2016 from a Moroccan dealer.
Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of lithic eucrite clasts with a variety of textures plus angular mineral grains in a finer grained matrix. Subophitic, quench-textured and very fine grained granulitic clasts were observed in a single thin section. Minerals are exsolved pigeonite, calcic plagioclase (exhibiting undulose extinction), unexsolved low-Ca pyroxene, silica polymorph, ilmenite, chromite and troilite.
Geochemistry: Orthopyroxene host (Fs59.2Wo3.2, FeO/MnO = 31, N = 1), clinopyroxene exsolution lamella (Fs32.0Wo38.2, FeO/MnO = 32, N = 1), low-Ca pyroxene (Fs31.2Wo5.6, FeO/MnO = 28, N = 1), plagioclase (An86.1-92.2Or0.7-0.2, N = 3).
Classification: Eucrite (polymict breccia).
Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. K. Regelman.
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)
|References:||Published in Meteoritical Bulletin, no. 106, in preparation (2017)|