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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 385 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 97 approved meteorites from Niger (plus 5 unapproved names)

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