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Northwest Africa 4881
Basic information Name: Northwest Africa 4881
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4881
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 606 g
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 97 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 1 Jan 2008
Revised 4 Aug 2008: final writeup
Writeup from MB 93:

Northwest Africa 4881

Mauritania or Algeria

Find: 2005

Achondrite (lunar, granulitic breccia)

History: Found in 2005 and purchased by Stefan Ralew in January 2007 from a dealer in Quarzazate, Morocco.

Physical characteristics: A single, broken, irregular conical stone (606 g) partially covered by translucent, pale greenish fusion crust and with a pale gray-brown interior (Fig. 2).

Petrography: (A. Irving and S. Kuehner, UWS) Fine-grained recrystallized breccia composed of larger plagioclase grains (converted partially to maskelynite) poikilitically enclosing very small grains (mostly 30-80 microns) of low-Ca pyroxenes, olivine, Ti-chromite, ilmenite, troilite and metal.

Mineral compositions and Geochemistry: Olivine (Fa40.4-58.8, FeO/MnO = 91-100), plagioclase (An96.1-98Or<0.1), pigeonite (Fs32.0-64.5Wo9.5-13.1, FeO/ MnO = 51.1-62).

Classification: Achondrite (lunar, granulitic breccia). This stone is paired with NWA 3163 (Irving et al. 2006) and NWA 4483; in combination these specimens evidently represent naturally broken pieces from a crusted lunar meteorite weighing at least 2448 g. Specimens: A total of 20 g of sample and one polished mount are on deposit at UWS. Ralew holds the main mass.

Submitted by: A. Irving, UWS.

Data from:
  Table 2
  Line 142:
Place of purchase:Quarzazate, Morocco
Date:January 2007
Mass (g):606
Type spec mass (g):20
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel   
Don Cuarzo   
Gerald Armstrong   
Jaeyong Lee   
Luis Alexandre Franco Gonçales   
Marco Fenner   
MeteoriteCollector.org - FCOM - Russ Finney   
Suzanne De Paula   

     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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