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Northwest Africa 4023
Basic information Name: Northwest Africa 4023
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4023
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 17.2 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 408 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Feb 2006
Revised 9 Sep 2006: Update classification
Writeuphelp
Writeup from MB 90:

Northwest Africa 4023

Northwest Africa

Find: 2005

Achondrite (eucrite, polymict)

History: A single stone of 17.2 g partly covered with fusion crust was found in the western part of the Sahara in Morocco in 2005.

Petrography: (A. Greshake, MNB) A polymict breccia consisting of basaltic, melt clasts, and mineral clasts set into a fine-grained brecciated groundmass. Mineral fragments are dominantly plagioclase and exsolved Ca pyroxene. Minor phases include silica, Al-Ti-chromite, and ilmenite.

Geochemistry: Plagioclase (An78.6–94.2), pyroxene (Fs27.7–56.5Wo2.7–40.2).

Classification: Achondrite (eucrite, polymict) with a high degree of shock and moderate degree of weathering.

Specimens: A 3.45 g type specimen and one polished thin section are on deposit at MNB. HSSH-Pirmasens of Germany holds the main mass.

Data from:
  MB90
  Table 2
  Line 245:
Place of purchase:Morocco
Date:2005
Mass (g):17.2
Pieces:1
Class:Euc
Shock stage:High
Weathering grade:moderate
Type spec mass (g):3.5
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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