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Northwest Africa 4232
Basic information Name: Northwest Africa 4232
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4232
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 124 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  EL3
Recommended:  EL-melt rock    [explanation]

This is 1 of 25 approved meteorites classified as EL-melt rock.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 24 Jul 2007
Revised 1 Sep 2019: Reclassified by Rubin (2016); deleted wrong coords
Writeuphelp
Writeup from MB 92:

Northwest Africa 4232

Northwest Africa

Find: December 2005

Enstatite chondrite (EL3)

History: G. Hupé purchased the specimens in December 2005 in Tagounite, Morocco.

Physical characteristics: The meteorite consists of two dark brown stones weighing 105 and 19 g. Cut surfaces have sparse grains of fresh metal, and there are multiple subparallel and anastomozing thin veinlets filled with iron oxides/hydroxides and some calcite from terrestrial weathering.

Petrography: (A. Irving and S. Kuehner, UWS) Predominantly granular texture with mostly equant and some bladed grains (0.5 to 1.5 mm). Composed mainly of pure enstatite with subordinate altered kamacite, altered troilite, plagioclase and accessory schreibersite and daubreelite (as blades in altered troilite). Sparse RP chondrules (0.2-0.8 mm in diameter) composed of radiating (and some subparallel) enstatite grain clusters.

Mineral compositions: Enstatite (En97.9-98.4Wo1.3-1.4) and plagioclase (An15.2-16.0Or4.3-4.4).

Classification: Enstatite chondrite (EL3); S1, W4/5. This specimen is similar to NWA 002, NWA 1067, NWA 2736, NWA 2965 and NWA 4295. It may also be related to Al Haggounia 001.

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


Writeup from MB 108:
Northwest Africa 4232: reclassification

Rubin (2016) reclassified Al Haggounia 001 and paired specimens as "vesicular, incompletely melted, EL chondrite impact melt rock[s]." NWA 4232 is likely paired, and is therefore also reclassified.
Bibliography:
  • Rubin A.E. (2016) Impact melting of the largest known enstatite meteorite: Al Haggounia 001, a fossil EL chondrite. Meteorit. Planet. Sci. 51 1576-1587. (link)
Data from:
  MB92
  Table 2
  Line 17:
Place of purchase:Tagounite, Morocco
Date:Dec-2005
Mass (g):124
Pieces:2
Class:EL3
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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
The Hupe Collection   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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