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Northwest Africa 14461
Basic information Name: Northwest Africa 14461
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14461
Observed fall: No
Year found: 2021
Country: Niger
Mass:help 1256 g
Recommended:  CK3    [explanation]

This is 1 of 74 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 11 Dec 2021
Writeup from MB 110:

Northwest Africa 14461 (NWA 14461)


Purchased: 2021 Mar

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Mbark Arjdal in March 2021 from a dealer in Niger.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Relatively large, well-formed, unequilibrated magnetite-bearing chondrules containing devitrified glass (apparent diameter 1070±420 µm, N = 26), plus fine grained AOA and fine- to medium-grained, irregularly-shaped CAI are set in an almost opaque matrix (~40 vol.%, black in thin section) containing Cr-rich magnetite, troilite (some in composite nodules with magnetite), plagioclase and rare kamacite. Minerals identified in CAI include gehlenite, spinel and perovskite.

Geochemistry: Olivine (Fa18.3±25.7, range Fa0.4-71.7, N = 9), low-Ca pyroxene (Fs3.0±2.4Wo0.8±0.4, range Fs0.6-5.9Wo0.3-1.3, N = 6), subcalcic augite (Fs1.3Wo30.7), diopside (Fs1.4Wo38.8), magnetite (Cr2O3 = 4.6 ± 2.4 wt.%, range 1.4-7.5 wt.%, N = 5).

Classification: Carbonaceous chondrite (CK3).

Specimens: 27.2 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  Table 0
  Line 0:
Place of purchase:Niger
Date:P 2021 Mar
Mass (g):1256
Shock stage:S2
Weathering grade:low
Fayalite (mol%):18.3±25.7
Ferrosilite (mol%):3.0±2.4
Wollastonite (mol%):0.8±0.4
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):27.2
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZA 13; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
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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     This is 1 of 100 approved meteorites from Niger (plus 5 unapproved names)

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