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Northwest Africa 4484
Basic information Name: Northwest Africa 4484
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4484
Observed fall: No
Year found: 2006
Country: Algeria
Mass:help 140 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Eucrite-basaltic
Recommended:  Eucrite    [explanation]

This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4484

Algeria

Find: June 2006

Achondrite (eucrite, basaltic)

History: S. Ralew purchased the specimens in June 2006 in Rissani, Morocco.

Physical characteristics:The meteorite consists of seven broken fragments of a dark grey stone with a combined weight of 140 g.

Petrography: (A. Irving and S. Kuehner, UWS) The thin section studied shows an ophitic texture, with large (≤ 1.3 mm) pyroxene grains (composed of orthopyroxene with fine augite exsolution lamellae or patchy intergrowths of orthopyroxene with augite) and distinctive, thin plagioclase laths (commonly in radiating clusters).Interstitial mesostasis regions contain silica, ilmenite, troilite and minor Ni-free kamacite (partly altered to brown iron hydroxides).

Mineral compositions and geochemistry:Augite (Fs32.4-32.8Wo41.2-41.3; FeO/MnO = 32.7-36.7), orthopyroxene (Fs64.9Wo2.9; FeO/MnO = 32.2) and plagioclase (An86.0-90.5Or0.2-0.5).

Classification: Achondrite (eucrite, basaltic).

Type specimens: A total of 20 g of sample and one polished thin section are on deposit at UWS. Ralew holds the main mass.

Data from:
  MB92
  Table 2
  Line 80:
Place of purchase:Rissani, Morocco
Date:Jun-2006
Mass (g):140
Pieces:7
Class:Euc
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. 92, MAPS 42, 1647-1694 (2007)
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1306 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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