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Northwest Africa 4123
Basic information Name: Northwest Africa 4123
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4123
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 46.9 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 358 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 4123

Northwest Africa

Find: 2004

Achondrite (eucrite, polymict)

History: A single stone of 46.9 g was found by an anonymous finder in the western part of the Sahara in Morocco and purchased in 2004 in Erfoud.

Petrography: (A. Greshake, MNB) Polymict breccia with basaltic, impact melt, and mineral clasts set into a fine-grained matrix of exsolved Ca pyroxene, plagioclase, and opaques. Large mineral clasts are present and are predominantly plagioclase and exsolved low-Ca pyroxene. Exsolution lamellae in pyroxene are generally very fine. Minor phases include silica and ilmenite.

Geochemistry: Plagioclase (An90.3), pyroxene (Fs39.1–55.0Wo2.3–17.4).

Classification: Achondrite (eucrite, polymict); moderate shock, minimal weathering.

Specimens: A 10 g type specimen is on deposit at MNB. Mr. Christian Anger of Austria holds the main mass.

Data from:
  MB90
  Table 2
  Line 315:
Place of purchase:Erfoud, Morocco
Date:2004
Mass (g):46.9
Pieces:1
Class:Euc
Shock stage:moderate
Weathering grade:minimal
Type spec mass (g):10
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Anger: Christian Anger, Korngasse 6, 2405 Bad Deutsch-Altenburg, Austria; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Austromet   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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