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Northwest Africa 11641
Basic information Name: Northwest Africa 11641
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11641
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 650 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 11641 (NWA 11641)

(Northwest Africa)

Purchased: 2017

Classification: Ureilite

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

Physical characteristics: Dark bownish fragment lacking any fusion crust.

Petrography: The meteorite shows a cumulate texture composed of up to 1 mm sized olivine and pigeonite grains. Olivine displays characteristic reduced rims and the meteorite contains abundant flaky graphite.

Geochemistry: reduced rims in olivine: Fa4.7-8.8; olivine contains 0.61±0.02 wt% Cr2O3 and 0.34±0.01 wt% CaO

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Mali
Date:P 2017
Mass (g):650
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):20.0±0.1 (n=12)
Ferrosilite (mol%):17.0±0.1 (n=12)
Wollastonite (mol%):9.1±0.1 (n=12)
Classifier:A. Greshake, MNB
Type spec mass (g):20.4
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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