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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:
Recommended:  Ureilite    [explanation]

This is 1 of 609 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 Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8636 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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