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Northwest Africa 14186
Basic information Name: Northwest Africa 14186
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14186
Observed fall: No
Year found: 2020
Country: Mali
Mass:help 390 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 14186 (NWA 14186)

Mali

Purchased: 2020 Apr

Classification: Ordinary chondrite (LL4)

History: Purchased by Mbark Arjdal in April 2020 from a Malian dealer.

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

Geochemistry: Olivine (Fa28.3±1.0, range Fa27.5-30.0, N = 5), low-Ca pyroxene (Fs22.3±0.9Wo1.2±0.7, range Fs20.5-23.0Wo0.4-2.2, N = 6), subcalcic augite (Fs15.5Wo27.7).

Classification: Ordinary chondrite (LL4).

Specimens: 45.6 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Mali
Date:P 2020 Apr
Mass (g):390
Pieces:1
Class:LL4
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):28.3±1.0
Ferrosilite (mol%):22.3±0.9
Wollastonite (mol%):1.2±0.7
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):45.6
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj H21; 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:

Mali
Coordinates:Unknown.

Statistics:
     This is 1 of 79 approved meteorites from Mali (plus 2 unapproved names)

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