Northwest Africa 11337
Basic information Name: Northwest Africa 11337
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11337
Observed fall: No
Year found: 1997
Country: (Northwest Africa)
Mass:help 420 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 14 Jul 2017
Writeup from MB 106:

Northwest Africa 11337 (NWA 11337)

(Northwest Africa)

Purchased: 1997

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Ken Regelman in 1997 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia containing some lithic eucrite clasts (with intersertal and microgranular textures) plus related mineral debris and <5 vol.% diogenitic orthopyroxene set in a finer grained, slightly stained matrix. Other minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, troilite and rare zircon. Some calcite veinlets were observed.

Geochemistry: Low-Ca pyroxene (Fs29.1Wo5.0; Fs47.7Wo2.6; FeO/MnO = 27-33; N = 2), orthopyroxene host (Fs58.4Wo3.7, FeO/MnO = 24), clinopyroxene exsolution lamella (Fs32.1Wo35.4, FeO/MnO = 25), clinopyroxene host in exsolved pigeonite (Fs33.9Wo33.6, FeO/MnO = 25), plagioclase (An90.7-91.9Or0.3-0.4, N = 2).

Classification: Eucrite (polymict breccia).

Specimens: 21.3 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 1997
Mass (g):420
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):29.1; 47.7; 58.4; 32.1
Wollastonite (mol%):5.0; 2.6; 3.7; 35.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.3
Type spec location:UWB
Main mass:K. Regelman
Comments:Work name ARN17-7; 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)
ARN: Kenneth Regelman, Astronomical Research Network, 206 Bellwood Ave., Maplewood, MN 55117, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)