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Northwest Africa 14420
Basic information Name: Northwest Africa 14420
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14420
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 500 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 23 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14420 (NWA 14420)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CV3)

History: Colvin purchased from a dealer in Mauritania via the internet.

Petrography: (M. Hutson, D. Sheikh, A. Ruzicka, Cascadia): In thin section, the sample contains chondrules and refractory inclusions including CAIs and AOAs (up to 4 mm across, with an average size of ~1 mm) set in a fine-grained dark matrix containing accessory magnetite grains. No metal was observed. The matrix comprises about 55% of the thin section area.

Geochemistry: Olivine Fa6.8±7.3, N=75; Low-Ca pyroxene Fs1.1±0.4Wo 1.4±1.1, N=12; Pigeonite Fs5.1±0.2Wo5.5±1.0, N=4; Augite Fs1.6±1.1Wo39.9±4.2, N=22. Pyroxenes contain aluminum and titanium; Al2O3 ranges (all wt% values) are 0.5-1.3 in low-Ca pyroxene, 2.5-4.0 in pigeonite, and 2.2-11.2 in augite; TiO2 ranges are 0.1-0.3 in low-Ca pyroxene and pigeonite, and 0.3-1.2 in augite.

Classification: Texture and chemistry, including abundant refractory inclusions indicates a CV3 chondrite. Lack of metal and presence of magnetite suggests an oxidized CV3; low magnetic susceptibility favors CVoxA3 from Gattacceca et al., 2020.

Specimens: Cascadia holds 35.6 g in three pieces, as well as a polished thin section; Colvin holds the main mass.

Bibliography:
  • Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:online
Date:P 2021
Mass (g):500
Pieces:1
Class:CV3
Shock stage:low
Weathering grade:low
Fayalite (mol%):6.8±7.3 (N=75)
Ferrosilite (mol%):1.1±0.4
Wollastonite (mol%):1.4±1.1
Magnetic suscept.:3.44
Classifier:M. Hutson, D. Sheikh, and A. Ruzicka, Cascadia
Type spec mass (g):35.6
Type spec location:Cascadia
Main mass:Colvin
Comments:Lab number CML 1413; submitted by Melinda Hutson
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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