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Northwest Africa 4884
Basic information Name: Northwest Africa 4884
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4884
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 42 g
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 98 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeup from MB 93:

Northwest Africa 4884

Northwest Africa

Find: July 2007

Achondrite (lunar, mingled basalt-rich breccia)

History: Purchased by Greg Hupé in July 2007 from a dealer in Tagounite, Morocco.

Physical characteristics: A single stone (42 g) partially covered by black fusion crust; interior slices show it to be a breccia composed of white, beige, and light gray clasts in a dark gray matrix (Fig. 3).

Petrography: (A. Irving and S. Kuehner, UWS) Regolithic breccia composed of abundant angular mineral and lithic clasts in a sparse vesicular, glassy matrix. Mineral fragments include calcic plagioclase, pigeonite, augite, Ti chromite, ilmenite (one with a tiny baddeleyite inclusion) and silica polymorph. Lithic clasts include several types of mare basalt (a coarse-grained example is composed of olivine + zoned pigeonite + calcic plagioclase + ilmenite + troilite), granophyric intergrowths of Fe-rich augite + fayalitic olivine + silica polymorph, a coarse-grained dunitic or troctolitic rock containing a large metal grain (associated with rutile and secondary ilmenite), and a large "breccia-within-breccia" clast. Mare basalt clasts and debris are predominant over highlands lithologies.

Geochemistry: Olivine clasts (Fa37.0-37.7; FeO/MnO = 94- 98), olivine in basalt clast (Fa87.9; FeO/MnO = 89), plagioclase (An92.4-95.3Or0.5-0.1), pigeonite host (Fs52.3Wo10.5; FeO/MnO = 65.2), augite lamella (Fs31.9Wo31.9; FeO/MnO = 60.3), pigeonite clast (Fs60.1Wo7.0; FeO/MnO = 71.1), augite clast (Fs17.2Wo36.9; FeO/MnO = 53.3). Bulk composition: (R. Korotev, WUSL) FeO = 13.7 wt%; Sm = 3.1 ppm, Th = 0.9 ppm, Ir = 3.4 ppb.

Classification: Achondrite (lunar, mingled basalt-rich breccia). Specimens: A total of 8.4 g of sample and one polished mount are on deposit at UWS. GHupé holds the main mass.

Submitted by: A. Irving, UWS.

Data from:
  Table 2
  Line 145:
Place of purchase:Tagounit, Morocco
Date:July 2007
Mass (g):42
Type spec mass (g):8.4
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Photos from the Encyclopedia of Meteorites:
the Hupe Collection   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Christophe PICQ   
Francois Pacaud   
John A. Shea Photo added 19 Apr 2022
Liam02 Photo added 19 Apr 2022
MeteoriteCollector.org - FCOM - Russ Finney Photo added 19 Apr 2022
Photo added 19 Apr 2022

     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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