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Northwest Africa 4896
Basic information Name: Northwest Africa 4896
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4896
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 220 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 4896 (NWA 4896)

(Northwest Africa)

Purchased: 2007

Classification: Ureilite

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

Physical characteristics: Brownish fragments without fusion crust.

Petrography: The meteorite is a coarse-grained augite-bearing ureilite composed of up to 2.5 mm sized Cr-rich olivine and Ca-pyroxene crystals showing a cumulate texture. It contains some flaky graphite; olivine displays characteristic reduced rims.

Geochemistry: reduced rims in olivine: Fa4.9-8.8; Cr2O3 in ol: ~0.5 wt%

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Tagounite, Morocco
Date:P 2007
Mass (g):220
Pieces:3
Class:Ureilite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):11.3±0.1 (n=10)
Ferrosilite (mol%):5.8±0.4 (n=11)
Wollastonite (mol%):37.9±0.6 (n=11)
Classifier:A. Greshake, MNB
Type spec mass (g):20.4
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann   
Geography: 
Coordinates:Unknown.

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

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