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:help 468 g
Recommended:  Eucrite-pmict    [explanation]

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)

(Northwest Africa)

Purchased: 2016

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.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):468
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):59.2; 31.2; 32.0
Wollastonite (mol%):3.2; 5.6; 38.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:K. Regelman
Comments:Work name KR17-2; submitted by A. Irving
   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)
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)