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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
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
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:
  Table 2
  Line 282:
Place of purchase:Rabat, Morocco
Date:2006 Apr
Mass (g):685
Weathering grade:moderate
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.9
Type spec location:UWS
Main mass:G. Hupé
   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)
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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     This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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