Meteoritical Bulletin: Entry for Northwest Africa 14222

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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: 200 g

Classification
history:

Recommended:

Ureilite [explanation]

This is 1 of 604 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 18 Sep 2021

Writeup

help

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: Fs_18.8±0.3Wo_4.5±0.1(Fs_18.4-19.2Wo_4.3-4.7, n=12), contains 1.08±0.04 wt% Cr₂O₃ and 1.77±0.03 wt% Al₂O₃; reduced rims in orthopyroxene: Fs_0.7-5.1Wo_0.9-1.3; augite: Fs_13.1±0.1Wo_31.7±0.2(Fs_12.8-13.2Wo_31.2-32.0, n=12), contains 1.81±0.05 wt% Cr₂O₃ and 2.68±0.04 wt% Al₂O₃; reduced rims in augite: Fs_0.7-1.3Wo_38.9-41.9

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:

Credit	Photos
Public domain photographs:
Ansgar Greshake

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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