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Northwest Africa 11892
Basic information Name: Northwest Africa 11892
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11892
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 2.13 kg
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 11892 (NWA 11892)

(Northwest Africa)

Purchased: Nov 2016

Classification: Ureilite

Petrography: olivine (80%) with reduced rims, pyroxenes (15%), metal, sulfides, and carbon phases. Metal grains are present in veins and at the edges of olivine, pyroxene, and carbon grains. Olivines are up to 2.5 mm. Graphite and diamond were found.

Geochemistry: Mineral Compositions and Geochemistry: Olivine cores, Fa21.6±0.1; rims Fa8.9±3.0. Pyroxenes contain a varied texture with lighter and darker spots, which display differing compositions: brighter Fs8.0±1.8Wo31.9±6.8; darker Fs11.5±2.4Wo7.9±1.6).

Classification: Ureilite

Specimens: 37.8g 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):2131.5
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):21.6±0.1 (N=10, core); 8.9±3.0 (N=10, rim)
Ferrosilite (mol%):11.5±2.4 (N=10); 8.0±1.8 (N=10)
Wollastonite (mol%):7.9±1.6 (N=10); 31.9±6.8 (N=10)
Classifier:M. Spencer, UWO
Type spec mass (g):37.8
Type spec location:UWO
Main mass:S. Tutorow
Comments:G692 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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6410 approved meteorites from (Northwest Africa) (plus 2023 unapproved names)

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