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Northwest Africa 14222
Basic information Name: Northwest Africa 14222
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14222
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 200 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 582 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 18 Sep 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14222 (NWA 14222)

(Northwest Africa)

Purchased: 2021

Classification: Ureilite

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in 2021.

Physical characteristics: Many dark brownish fragments without fusion crust.

Petrography: The meteorite is composed of mostly lath-shaped up to 1.5 mm long orthopyroxene and rounded to sub-rounded augite crystals, the latter often poicilitically enclosed in orthopyroxene. Orthopyroxene shows resorption textures and weak lamellar compositionally zoning. Augite and orthopyroxene display characteristic reduced rims in contact with FeNi-metal or graphite. The meteorite contains troilite and abundant graphite. No olivine present.

Geochemistry: orthopyroxene: Fs18.8±0.3Wo4.5±0.1 (Fs18.4-19.2Wo4.3-4.7, n=12), contains 1.08±0.04 wt% Cr2O3 and 1.77±0.03 wt% Al2O3; reduced rims in orthopyroxene: Fs0.7-5.1Wo0.9-1.3; augite: Fs13.1±0.1Wo31.7±0.2 (Fs12.8-13.2Wo31.2-32.0, n=12), contains 1.81±0.05 wt% Cr2O3 and 2.68±0.04 wt% Al2O3; reduced rims in augite: Fs0.7-1.3Wo38.9-41.9

Classification: Ureilite, augite-bearing

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021
Mass (g):200
Pieces:many
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):18.8; 13.1
Wollastonite (mol%):4.5; 31.7
Classifier:A. Greshake, MNB
Type spec mass (g):22.7
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. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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