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Northwest Africa 11893
Basic information Name: Northwest Africa 11893
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11893
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 526 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 475 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 3 Aug 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11893 (NWA 11893)

(Northwest Africa)

Purchased: Feb 2017

Classification: Ureilite

Petrography: The sample has a fine grained brecciated texture. It contains olivine (~65%) with reduced rims, pyroxene (pigeonite) (~25%), Metals in veins around grain boundaries, and graphite. Olivines are up to 3 mm. Graphite was found.

Geochemistry: Mineral Compositions and Geochemistry: Olivine core and rim compositions vary, with reduced rims. Cores Fa16.0±0.1 (Fa15.9-16.1, N=10); rims Fa4.5±2.3 (Fa1.9 8.4, N=10). All pyroxenes are clinopyroxene, Fs13.7±0.1Wo7.4±0.1 (Fs13.4-13.8Wo7.3-7.5, N=10).

Classification: Ureilite

Specimens: 21.0 g including a thin section and polished mount at UWO.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P Feb 2017
Mass (g):525.7
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):16.0±0.1 (core); 4.5±2.3 (rim)
Ferrosilite (mol%):13.7±0.1 (13.4-13.8, N=10)
Wollastonite (mol%):7.4±0.1 (7.3-7.5, N=10)
Classifier:M. Spencer, C.P. Wang, UWO
Type spec mass (g):21.0
Type spec location:UWO
Main mass:S. Tutorow
Comments:G703 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6506 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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