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Northwest Africa 14189
Basic information Name: Northwest Africa 14189
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14189
Observed fall: No
Year found: 2021
Country: Niger
Mass:help 397 g
Classification
  history:
Recommended:  LL4    [explanation]

This is 1 of 387 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 20 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14189 (NWA 14189)

Niger

Purchased: 2021 Jan

Classification: Ordinary chondrite (LL4)

History: Purchased by Mbark Arjdal in January 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed chondrules containing devitrified glass are set in a matrix containing troilite, stained kamacite, pigeonite, subcalcic augite, chromite and chlorapatite.

Geochemistry: Olivine (Fa28.2±0.4, range Fa27.6-28.7, N = 6), low-Ca pyroxene (Fs21.5±0.6Wo1.9±1.9, range Fs20.6-21.8Wo0.5-4.8, N = 4), pigeonite (Fs17,2Wo8.1), subcalcic augite (Fs11.5Wo29.2).

Classification: Ordinary chondrite (LL4).

Specimens: 42.5 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 Jan
Mass (g):397
Pieces:1
Class:LL4
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):28.2±0.4
Ferrosilite (mol%):21.5±0.6
Wollastonite (mol%):1.9±1.9
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):42.5
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj H25; 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 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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Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 100 approved meteorites from Niger (plus 5 unapproved names)

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