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Northwest Africa 1000
Basic information Name: Northwest Africa 1000
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1000
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 1200 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Eucrite
Meteoritical Bulletin:  MB 86  (2002)  Eucrite
MetBase:  v. 7.1  (2006)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 471 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from MB 86:

Northwest Africa 1000

Morocco

Purchased 2001

Achondrite (eucrite)

One stone, which was probably recovered in Morocco, was purchased by DGregory.  The stone has a reported total weight of 1200 g. Mineralogy and classification (P. Warren, UCLA): subophitic and slightly variolitic (fan-spherulitic) texture with laths of plagioclase (up to 4 mm long) and pyroxene (up to 5 mm). Pyroxenes are zoned from En68Wo4 to En16Wo26 with an offshoot from the main trend toward En40Wo3 resulting from a reaction of early pigeonite with intruded veins of fayalitic olivine (Fo16–25). About half of the plagioclase has been shock-altered to isotropic glass (maskelynite), average An83 (range An75–86, n = 29). Bulk composition and ratios of Ga/Al = 0.020 and Fe/Mn = 38 support its classification as eucrite (Warren, 2002).  Moderately weathered as shown by carbonate veining. Specimens: type specimen, 22 g, and one thin section, UCLA; main mass, DGregory.

Data from:
  MB86
  Table 6
  Line 95:
Date:P Nov 2001
Mass (g):1200
Pieces:1
Class:Eucrite
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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