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Northwest Africa 4643
Basic information Name: Northwest Africa 4643
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4643
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 995 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  EL6
Recommended:  EL6    [explanation]

This is 1 of 120 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 9 Nov 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 4643 (NWA 4643)

(Northwest Africa)

Purchased: 2006

Classification: Enstatite chondrite (EL6)

History: The meteorite was found by an anonymous finder in northwest Africa and bought by the main mass holder in Erfoud, Morocco.

Physical characteristics: Two brownish fragments without fusion crust weighing together 995.3 g.

Petrography: The meteorite displays a recrystallized texture of dominantly almost pure enstatite; no chondrules found in the section studied. Sulfides and FeNi metal are heavily oxidized.

Geochemistry: Pyroxene, Fs0.1-0.7. The few unweathered FeNi metal shows ~0.5 wt% Si.

Classification: Enstatite chondrite (EL6); low degree of shock, high degree of weathering.

Specimens: 21.4 g plus one polished thin section are on deposit at MNB.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2006
Mass (g):995.3
Pieces:2
Class:EL6
Shock stage:low
Weathering grade:high
Ferrosilite (mol%):0.3 (0.1-0.7)
Classifier:A. Greshake, MNB
Type spec mass (g):21.4
Type spec location:MNB
Main mass:Hanno Strufe
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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