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Northwest Africa 11202
Basic information Name: Northwest Africa 11202
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11202
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 117.5 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 660 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 21 Apr 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11202 (NWA 11202)

(Northwest Africa)

Purchased: Mar 2016

Classification: Ureilite

History: Purchased by Brahim Tahiri in Morocco and sent to his partner Sean Tutorow for analysis.

Physical characteristics: Weathered, dark-colored exterior; saw cut reveals dark gray mosaic of silicate grains, most in the size range ~0.5 mm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a texturally equilibrated mix of polygonal olivine and pyroxene grains bounded by metal and oxidized metal veinlets. Ubiquitous, lens shaped graphite grains were observed. Olivines did not have dramatic reduction rims.

Geochemistry: (C. Agee and B. Ha, UNM) Olivine Fa15.0±0.9, Fe/Mn=55±3, Cr2O3=0.51±0.03 (wt%), n=7; pigeonite, Fs14.1±1.7Wo4.7±0.1, Fe/Mn=20±4, n=3; augite, Fs9.4±3.8Wo37.0±1.4, Fe/Mn=17±8, n=7.

Classification: Augite bearing ureilite

Specimens: 20.1 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P Mar 2016
Mass (g):117.47
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):15.0±0.9
Ferrosilite (mol%):14.1±1.7, 9.4±3.8
Wollastonite (mol%):4.7±0.1, 37.0±1.4
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G683; submitted by C. Agee, UNM
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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