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Northwest Africa 14221
Basic information Name: Northwest Africa 14221
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14221
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 60 g
Classification
  history:
Recommended:  R4    [explanation]

This is 1 of 67 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 17 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14221 (NWA 14221)

(Northwest Africa)

Purchased: 2021

Classification: Rumuruti chondrite (R4)

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

Physical characteristics: Grayish rock largely covered with fusion crust.

Petrography: The meteorite displays a dark grayish interior, appears unbrecciated and is composed of distinct chondrules (mean diameter about 400 μm) set in a fine grained matrix dominated by ferroan olivine. Some low-Ca pyroxene in chondrules is compositionally unequilibrated. More minor phases include Ca-pyroxene, sodic plagioclase, pentlandite, and ilmenite; no metal has been detected.

Geochemistry: olivine: Fa37.8±0.1 (Fa37.6-38.1, n=10); low-Ca pyroxene: Fs19.0±7.1Wo0.6±0.03 (Fs9.8-28.8Wo0.5-0.6, n=10); Ca-pyroxene: Fs10.2±0.7Wo45.4±1.9 (Fs9.6-12.2Wo40.0-46.4, n=9); feldspar: An8.0-11.7Ab83.7-87.2Or2.7-5.5, n=6

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021
Mass (g):60
Pieces:1
Class:R4
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):37.8
Ferrosilite (mol%):19.0; 10.2
Wollastonite (mol%):0.6; 45.4
Classifier:A. Greshake, MNB
Type spec mass (g):12.4
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 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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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