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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 583 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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