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Northwest Africa 14182
Basic information Name: Northwest Africa 14182
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14182
Observed fall: No
Year found: 2019
Country: Niger
Mass:help 420 g
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
Writeup from MB 110:

Northwest Africa 14182 (NWA 14182)


Purchased: 2019 Sep

Classification: Ordinary chondrite (LL4)

History: Purchased by Mbark Arjdal in September 2019 from a dealer in Niger.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely packed, relatively large, well-formed equilibrated chondrules (some glass-bearing, some plagioclase-bearing) are set in a sparse matrix containing stained kamacite, taenite, troilite, pentlandite, low-Ti chromite and chlorapatite.

Geochemistry: Olivine (Fa30.6±0.4, range Fa29.9-30.9, N = 5), low-Ca pyroxene (Fs24.7±0.3Wo0.6±0.3, range Fs24.3-24.9Wo0.3-0.9, N = 3), pigeonite (Fs23.4Wo5.3; Fs19.7Wo15.9; N = 2), augite (Fs9.2±1.8Wo46.2±0.9, range Fs7.9-10.4Wo46.8-45.5, N = 2).

Classification: Ordinary chondrite (LL4).

Specimens: 45.4 g plus one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  Table 0
  Line 0:
Place of purchase:Niger
Date:P 2019 Sep
Mass (g):420
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):30.6±0.4
Ferrosilite (mol%):24.7±0.3
Wollastonite (mol%):0.6±0.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):45.4
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 650; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
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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