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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:help 98 g
Classification
  history:
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 30 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 31 Oct 2021
Writeuphelp
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: Fa22.3±0.1 (Fa22.1-22.4, n=10), contains 0.62±0.04 wt% Cr2O3 and 0.37±0.02 wt% CaO; reduced rims in olivine: Fa3.2-3.8; homogeneous olivine: Fa12.2±0.1, n=8; low-Ca pyroxene: Fs10.8±0.1Wo4.8±0.1 (Fs10.7-10.9Wo4.7-4.9, n=7); Ca-pyroxene: Fs16.0±0.1Wo38.2±0.2 (Fs15.9-16.2Wo37.8-38.4, n=7); feldspar: An35.3-38.6Ab61.2-64.5Or0.1-0.2, 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 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 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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