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Northwest Africa 14473
Basic information Name: Northwest Africa 14473
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14473
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 27 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 614 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 15 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14473 (NWA 14473)

(Northwest Africa)

Purchased: 2021 Aug

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: Black fragment almost completely covered with fusion crust.

Petrography: Brecciated carbonaceous chondrite composed of small (apparent mean diameter about 300 μm) chondrules, chondrule pseudomorphs, mineral fragments, and rare CAIs, some of which surrounded by fine-grained dust rims set into abundant fine-grained matrix. The Fe-rich matrix contains abundant sulfides and Ca-carbonates; some chondrule pseudomorphs contain fibrous phyllosilicates.

Geochemistry: Matrix analyses yield FeO=32.4±1.9 wt% and an average total of 76.7±1.7 wt% (5 µm defocused beam, N=7), the latter indicating the presence of hydrous minerals. Ca-carbonate contains 0.98 wt% FeO, N=2.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021 Aug
Mass (g):27
Pieces:1
Class:CM2
Shock stage:S1
Weathering grade:low
Fayalite (mol%):14.7±21.9 (0.9-69.6, n=17)
Ferrosilite (mol%):1.5±0.2 (1.3-2.0, n=13)
Wollastonite (mol%):1.7±0.7 (1.0-2.8, n=13)
Classifier:A. Greshake, MNB
Type spec mass (g):5.4
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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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