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Northwest Africa 2890
Basic information Name: Northwest Africa 2890
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2890
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 132 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 384 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 21 Sep 2005
Writeuphelp
Writeup from MB online:

Northwest Africa 2890

Northwest Africa

Find: 2004

Achondrite (howardite)

History: An anonymous finder recovered a single stone of 132 g within the North African Sahara in 2004.

Petrography and Geochemistry: (A. Greshake, MNB) Polymict breccia with eucritic and diogenitic fragments embedded in a clastic matrix and contains dark impact melt fragments. Eucrite clasts consist mainly of frequently exsolved Ca pyroxene and plagioclase (An96.4–97.3), pigeonite (Fs37.3–53.0Wo9.3–13.4), augite (Fs23.0–31.1Wo39.6–43.3), with minor olivine, Mg-Al-chromite, and ilmenite. Diogenitic lithologies are dominated by orthopyroxene (Fs18.8–32.0) that are not always zoned.

Classification: Achondrite (howardite); low-shock, minimal weathering.

Specimens: A 22.1 g type specimen and one thin section are on deposit at MNB. Stefan Ralew of Germany holds the main mass.

Data from:
  MB90
  Table 2
  Line 154:
Place of purchase:Unknown
Date:2004
Mass (g):132
Pieces:1
Class:How
Type spec mass (g):22.1
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; 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 uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel   
Andreas Grünemeyer   
aranemac   
Dirk Hohmann         
Gregor H.   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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