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Northwest Africa 13922
Basic information Name: Northwest Africa 13922
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13922
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 5.15 kg
Recommended:  H4    [explanation]

This is 1 of 6038 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 25 Apr 2021
Writeup from MB 110:

Northwest Africa 13922 (NWA 13922)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (H4)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently donated to PSF and in January 2021 purchased by Kevin Sevey.

Petrography: (A. Irving, UWS and J. Boesenberg, Brown U.) Well-formed relatively small, equilibrated chondrules are set in a relatively coarse grained matrix containing stained kamacite, chromite, chlorapatite, troilite and pentlandite. Both clear glass and devitrified glass are present.

Geochemistry: Olivine (Fa18.2±0.3, range Fa18.0-19.0, N = 8), low-Ca pyroxene (Fs16.1±0.3Wo1.4±0.1, range Fs15.8-16.7Wo1.3-1.5, N = 9), augite (Fs6.1±0.4Wo45.1±0.4, range Fs5.8-6.3Wo44.8-45.3, N = 2).

Classification: Ordinary chondrite (H4).

Specimens: 203 g including one polished thin section at PSF; remainder with Mr. K. Sevey.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):5146
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):18.2±0.3
Ferrosilite (mol%):16.1±0.3
Wollastonite (mol%):1.4±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, Brown U.
Type spec mass (g):203
Type spec location:PSF
Main mass:K. Sevey
Comments:Work name KS-1; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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