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Northwest Africa 15222
Basic information Name: Northwest Africa 15222
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15222
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1006 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 658 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 14 Sep 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15222 (NWA 15222)

(Northwest Africa)

Purchased: May 2022

Classification: Ureilite

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in May, 2022.

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite exhibits a coarse-grained protogranular texture of up to 3 mm angular to subrounded olivine and less abundant pigeonite crystals. Olivine displays pronounced reduced rims and the meteorite contains flaky graphite, troilite, and mostly altered kamacite.

Geochemistry: reduced rims in olivine: Fa1.3-3.4; olivine contains 0.60±0.03 wt% Cr2O3 and 0.35±0.01 wt% CaO; pigeonite contains 0.98±0.04 wt% Cr2O3 and 0.49±0.03 wt% Al2O3

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P May 2022
Mass (g):1006
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):20.2±0.1 (n=10)
Ferrosilite (mol%):17.4±0.1 (n=10)
Wollastonite (mol%):6.3±0.1 (n=10)
Classifier:A. Greshake, MNB
Type spec mass (g):20
Type spec location:MNB
Main mass:Salamu Ali
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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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