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Northwest Africa 3137
Basic information Name: Northwest Africa 3137
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3137
Observed fall: No
Year found: 2004
Country: Morocco
Mass:help 931 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Eucrite
MetBase:  v. 7.1  (2006)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 459 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from MB online:

Northwest Africa 3137

Morocco

Purchased 2004 February

Achondrite (eucrite)

A large, broken, very fresh stone (931 g; 145 mm x 90 mm x 43 mm) about half coated with thin black fusion crust was purchased from a Moroccan dealer at the Tucson Gem and Mineral Show by P. Mani (Mani) in 2004 February. Classification and mineralogy (A. Irving and S. Kuehner, UWS):  Metamorphic texture.   Aggregate of exsolved low-Ca pyroxene, some exsolved augite and calcic plagioclase (An89.1-90.7Or0.1-0.2) with accessory silica polymorph (enclosing troilite, augite and rare merrillite), chromite, ilmenite and troilite (with rare included baddeleyite).  Most pyroxene grains consist of fine lamellae of augite (Fs26.4-28.7Wo43.5-44.4, FeO/MnO = 30.7 - 33.7) within orthopyroxene (Fs61.6-2.0Wo1.4-1.7, FeO/MnO = 30.8 - 32.2), and originally were pigeonite.  Although the pyroxene and plagioclase compositions in this specimen are almost identical to those in NWA 3138, the textures are quite different, and these two stones are not paired.  Specimens: type specimens, 20.6 g, and two polished thin sections, UWS; main mass, Philip Mani, 901 Sonterra Blvd., Suite 316, San Antonio, TX  78258.

Data from:
  MB89
  Table 7
  Line 475:
Origin or pseudonym:Morocco
Date:2004
Mass (g):931
Pieces:1
Class:Euc
Ferrosilite (mol%):61.6-2.0
Type spec mass (g):20.6
Comments:An89.1-90.7Or0.1-0.2; Augite Fs26.4-28.7Wo43.5-44.4; Undefined note: UWS means University of Washington, Department of Geological Sciences, Box 351310, Seattle, WA 98195, USA
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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