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Northwest Africa 11891
Basic information Name: Northwest Africa 11891
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11891
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 290 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 471 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 3 Aug 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11891 (NWA 11891)

(Northwest Africa)

Purchased: Nov 2016

Classification: Ureilite

Petrography: olivine (90%) with reduced rims, pyroxene (5%), metals, and carbon phases. Olivine grains are up to 1.5 mm. Graphite and diamonds were found.

Geochemistry: Mineral Compositions and Geochemistry: Olivine cores, Fa19.7±0.1; rims, Fa10.2±2.0. Pyroxene, Fs16.7±0.2Wo7.6±0.1.

Classification: Ureilite

Specimens: 20.1g including a thin section and polished mount at UWO.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P Nov 2016
Mass (g):289.7
Pieces:4
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):19.7±0.1 (N=10, core); 10.2±2.0 (N=10, rim)
Ferrosilite (mol%):16.7±0.2 (N=10)
Wollastonite (mol%):7.6±0.1 (N=10)
Classifier:M. Spencer, UWO
Type spec mass (g):20.1
Type spec location:UWO
Main mass:S. Tutorow
Comments:G691 as a field name.; submitted by A. Bouvier
Institutions
   and collections
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6407 approved meteorites from (Northwest Africa) (plus 2023 unapproved names)

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