Meteoritical Bulletin: Entry for Northwest Africa 14228

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Northwest Africa 14228

Basic information

Name: Northwest Africa 14228
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14228
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 98 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Ureilite-pmict
Recommended:			Ureilite-pmict [explanation]

This is 1 of 34 approved meteorites classified as Ureilite-pmict. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 31 Oct 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 14228 (NWA 14228)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Ureilite (polymict)

History: The meteorite was purchased from a meteorite dealer in Ouarzazate, Morocco.

Physical characteristics: Three dark brownish fragments with some fusion crust.

Petrography: The meteorite is a polymict breccia composed of up to 2 mm sized mineral fragments and lithic clasts set in a fine-grained clastic matrix. Dominant minerals are olivine with reduced rims, compositionally homogeneous olivine, low-Ca pyroxene, Ca-pyroxene, and feldspar. Minor phases are silica and FeS. Lithic clasts include impact melt and carbonaceous C1/2 clasts. The meteorite contains flaky graphite.

Geochemistry: olivine cores: Fa_22.3±0.1(Fa_22.1-22.4, n=10), contains 0.62±0.04 wt% Cr₂O₃ and 0.37±0.02 wt% CaO; reduced rims in olivine: Fa_3.2-3.8; homogeneous olivine: Fa_12.2±0.1, n=8; low-Ca pyroxene: Fs_10.8±0.1Wo_4.8±0.1(Fs_10.7-10.9Wo_4.7-4.9, n=7); Ca-pyroxene: Fs_16.0±0.1Wo_38.2±0.2(Fs_15.9-16.2Wo_37.8-38.4, n=7); feldspar: An_35.3-38.6Ab_61.2-64.5Or_0.1-0.2, n=6

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Ouarzazate, Morocco
Date:	P 2021 Jan
Mass (g):	98
Pieces:	3
Class:	Ureilite-pmict
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	22.3; 12.2
Ferrosilite (mol%):	10.8; 16.0
Wollastonite (mol%):	4.8; 38.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	24.1
Type spec location:	MNB
Main mass:	Noreddine Azelmat
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., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Photos:

Credit	Photos
Public domain photographs:
Ansgar Greshake

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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