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Northwest Africa 4473
Basic information Name: Northwest Africa 4473
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4473
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 7.02 kg
Meteoritical Bulletin:  MB 92  (2007)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 524 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 24 Jul 2007
Revised 30 Aug 2011: Fixed error in mass to agree with text
Writeup from MB 92:

Northwest Africa 4473

Northwest Africa

Find: July 2006

Achondrite (diogenite)

History: G. Hupé purchased a total of 32 dark stones in July 2006 in Laâyoune, Morocco.

Physical characteristics: Cut-surfaces of the stones show pale yellowish-green angular clasts (see figure) and have a combined weight of 7020 g. No fusion crust was noted for any of the specimens.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of polycrystalline clasts (≤ 2 cm) set in a matrix derived from several different diogenite precursors. No basaltic eucrite clasts were observed. The sample is modally dominated by orthopyroxene with subordinate olivine, augite, chromite, silica polymorph, rare calcic plagioclase, troilite, pyrrhotite and kamacite.

Mineral compositions: Orthopyroxene compositions fall into at least three distinct populations (median compositions): Fs17.2Wo1.0, FeO/MnO = 34.4; Fs21.6Wo2.1, FeO/MnO = 29.3; Fs37.2Wo3.5, FeO/MnO = 32.6). Olivine (Fa24.5, FeO/MnO = 50.2).

Classification: Achondrite (diogenite).

Specimens: A total of 20.1 g of sample and one polished mount are on deposit at UWS. GHupé holds the main mass.

An image of a handsample of Northwest Africa 4473

Data from:
  Table 2
  Line 74:
Place of purchase:Laayoune, Morocco
Mass (g):32 [sic]
Type spec mass (g):20.1
   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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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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)
Denis gourgues      
Don Cuarzo   
Filip Stalmach   
Jim K   
John Lutzon   
Mark Crawford   
Svend Buhl   
Photographs from MetBull:
Unknown A photo is in the write-up above

     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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