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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 427 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 Photo added 20 Oct 2022
Andreas Grünemeyer Photo added 20 Oct 2022
aranemac Photo added 20 Oct 2022
Dirk Hohmann Photo added 20 Oct 2022
Photo added 20 Oct 2022
Photo added 20 Oct 2022
Gregor H.   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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