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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
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 62 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 1 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
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:
  MB93
  Table 2
  Line 142:
Place of purchase:Quarzazate, Morocco
Date:January 2007
Mass (g):606
Pieces:1
Class:Lunar
Type spec mass (g):20
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ALESSANDRO TAKEDA   
André Knöfel   
Gerald Armstrong   
Jaeyong Lee   
Luis Alexandre Franco Gonçales   
Marco Fenner   
MeteoriteCollector.org - FCOM - Russ Finney   
Suzanne De Paula   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5351 approved meteorites from (Northwest Africa) (plus 2121 unapproved names)

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