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Northwest Africa 4760
Basic information Name: Northwest Africa 4760
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4760
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 103 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 491 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 12 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 4760 (NWA 4760)

(Northwest Africa)

Purchased: 2007

Classification: Ureilite

History: The meteorite was purchased in 2007 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Dark-brownish individual without fusion crust.

Petrography: The meteorite shows a cumulate texture of up to 2 mm sized Cr-rich olivine and pigeonite crystals often sharing 120 degree grain boundaries. It contains some flaky graphite; olivine displays characteristic reduced rims. Fractures are partly filled with brownish alteration products.

Geochemistry: reduced rims in olivine: Fa2.0-9.1; Cr2O3 in ol: ~0.7 wt%

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2007
Mass (g):103
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):17.0±0.3 (n=7)
Ferrosilite (mol%):15.2±0.2 (n=19)
Wollastonite (mol%):7.6±0.1 (n=19)
Classifier:A. Greshake, MNB
Type spec mass (g):21.4
Type spec location:MNB
Main mass:Carsten Giessler
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Charley Kettel   
Corey Kuo   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6672 approved meteorites from (Northwest Africa) (plus 2024 unapproved names)

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