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Northwest Africa 4301
Basic information Name: Northwest Africa 4301
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4301
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 685 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Enst achon-ung
Recommended:  Enst achon-ung    [explanation]

This is 1 of 5 approved meteorites classified as Enst achon-ung.   [show all]
Search for other: Achondrites, Enstatite achondrites, Enstatite-rich meteorites, and Ungrouped achondrites
Comments: Approved 11 Jun 2006
Writeuphelp
Writeup from MB 91:

Northwest Africa 4301

Mauritania or Algeria

Find: April 2006

Enstatite achondrite (ungrouped)

History: Purchased in April 2006 by G. Hupé from a Moroccan dealer in Rabat.

Physical characteristics: A single 685 g stone with some reddish external weathering.

Petrography: (A. Irving and S. Kuehner, UWS)

Subequigranular igneous cumulate texture with relatively coarse-grained (0.2–0.8 mm) silicate, metal, and sulfide grains. Composed mainly of polysynthetically twinned pure enstatite = 70 vol% and kamacite = 15 vol%, with subordinate interstitial plagioclase = 10 vol% and troilite = 5 vol%. Micrometer-size blades and blebs of kamacite and rare daubreelite also occur as inclusions within enstatite.

Mineral composition: Plagioclase (An30.7–37.6Or1.8–1.3).

Classification: Enstatite achondrite (ungrouped). Terrestrial weathering has produced some limonite along grain boundaries. This specimen is very similar in texture and mineral compositions to Zakłodzie.

Type specimen: A total of 22.9 g, one polished thin section and one polished mount, are on deposit at UWS. G. Hupé holds the main mass.

Data from:
  MB91
  Table 2
  Line 282:
Place of purchase:Rabat, Morocco
Date:2006 Apr
Mass (g):685
Pieces:1
Class:Aung
Weathering grade:moderate
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.9
Type spec location:UWS
Main mass:G. Hupé
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Chris Handler   
Gerald Armstrong   
John A. Shea   
John Lutzon      
Piotr gural100   
Solar Anamnesis      
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7320 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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