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Northwest Africa 1923
Basic information Name: Northwest Africa 1923
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1923
Observed fall: No
Year found: 2003
Country: Morocco
Mass:help 112 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Eucrite-gabbroic
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
Comments: Approved 3 Feb 2006
Writeuphelp
Writeup from MB 90:

Northwest Africa 1923

Morocco

Find: March 2003

Achondrite (eucrite, gabbroic)

History: DGregory purchased an extremely fresh, unbrecciated stone weighing 112 g with black fusion crust from a Moroccan dealer in March 2003.

Petrography: (A. Irving and S. Kuehner, UWS) Coarse-grained, noncumulus, igneous texture with primary grain contacts. Subequal amounts anorthite and pale yellow pigeonite with minor chromite.

Geochemistry: Anorthite (An95); low-Ca pyroxene grains consist of orthopyroxene (Fs37.8Wo2.9; FeO/MnO = 25.8) with sparse blades of exsolved clinopyroxene (Fs16.3Wo43.2; FeO/ MnO = 23.8).

Classification: Achondrite (eucrite, gabbroic).

Specimens: A 20.4 g type specimen and one polished thin section are on deposit at UWS. DGregory holds the main mass.

Data from:
  MB90
  Table 2
  Line 8:
Place of purchase:Morocco
Date:Mar 2003
Mass (g):112
Pieces:1
Class:Euc
Shock stage:High
Type spec mass (g):20.4
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)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1459 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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