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Northwest Africa 11639
Basic information Name: Northwest Africa 11639
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11639
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 583 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 531 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 20 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11639 (NWA 11639)

(Northwest Africa)

Purchased: 2017

Classification: Ureilite

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

Physical characteristics: Dark brownish fragment lacking any fusion crust.

Petrography: The meteorite displays a characteristic cumulate texture of up to 2 mm sized olivine and orthopyroxene crystals. Reduced rims in olivine are abundant. The meteorite contains flaky graphite.

Geochemistry: reduced rims in olivine: Fa3.6-5.8; olivine contains 0.32±0.02 wt% Cr2O3 and 0.25±0.02 wt% CaO

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):583
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):25.5±0.1 (n=11)
Ferrosilite (mol%):21.0±0.3 (n=12)
Wollastonite (mol%):4.3±0.1 (n=12)
Classifier:A. Greshake, MNB
Type spec mass (g):24.1
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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