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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
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 68 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
Writeuphelp
Writeup from MB 110:

Northwest Africa 14461 (NWA 14461)

Niger

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:
  MB110
  Table 0
  Line 0:
Place of purchase:Niger
Date:P 2021 Mar
Mass (g):1256
Pieces:1
Class:CK3
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
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 94 approved meteorites from Niger (plus 3 unapproved names)

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