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Northwest Africa 15359
Basic information Name: Northwest Africa 15359
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15359
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 525 g
Recommended:  EL3    [explanation]

This is 1 of 26 approved meteorites classified as EL3.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Comments: Approved 27 Nov 2022
Writeup from MB 111:

Northwest Africa 15359 (NWA 15359)

(Northwest Africa)

Purchased: 2022

Classification: Enstatite chondrite (EL3)

History: Purchased by John Divelbiss in 2022 from a dealer in Riverside, California, who had obtained the material from a Moroccan source.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, highly magnesian glass-bearing chondrules (apparent diameter 740±450 µm, N = 24) are set in a fresh fine-grained matrix (~15 vol.%, opaque in thin section) containing Si-bearing kamacite, daubreelite, alabandite, Ti-Cr bearing troilite, oldhamite, silica polymorph and intermediate plagioclase.

Geochemistry: Forsterite (Fa0.2±0.3, range Fa0.1-0.8, N = 6), enstatite (Fs0.4±0.2Wo1.0±0.1, range Fs0.2-0.8Wo0.8-1.3, N = 12), diopside (Fs0.9±0.3Wo46.5±0.5, range Fs0.5-1.2Wo47.1-46.1, N = 4), kamacite (Ni 6.7-8.1 wt.%, Si 0.7 wt.%, N = 6).

Classification: Enstatite chondrite (EL3).

Specimens: 24.6 g including one polished thin section at UWB; remainder with Mr. J. Divelbiss.

Data from:
  Table 0
  Line 0:
Place of purchase:Riverside, CA
Date:P 2022
Mass (g):525
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):0.2±0.3
Ferrosilite (mol%):0.4±0.2
Wollastonite (mol%):1.0±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):24.5
Type spec location:UWB
Main mass:J. Divelbiss
Comments:Work name JD22-13; 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)
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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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