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Northwest Africa 13222
Basic information Name: Northwest Africa 13222
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13222
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 270 g
Recommended:  H3    [explanation]

This is 1 of 695 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 5 Apr 2020
Writeup from MB 109:

Northwest Africa 13222 (NWA 13222)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Ordinary chondrite (H3)

History: Purchased by Grant Harkness in October 2019 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Relatively small, unequilibrated glass-bearing chondrules (apparent diameter 530±270 µm, N = 22) are set in a finer-grained matrix containing abundant fresh metal, troilite, chromite and Cl-free apatite.

Geochemistry: Olivine (Fa21.4±6.2, range Fa17.3-37.3, N = 8; Cr2O3 in ferroan examples <0.09 wt.%, N = 5), low-Ca pyroxene (Fs15.4±2.9Wo1.0±0.3, range Fs10.3-17.5Wo0.5-1.3, N = 5), augite (Fs5.1Wo45.9).

Classification: Ordinary chondrite (H3). NWA 13220, NWA 13222, NWA 13226, and NWA 13228, which were obtained from the same source at the same time, are probably paired.

Specimens: 27.4 g including one polished thin section at PSF; remainder in the Harkness Collection.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2019 Oct
Mass (g):270
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):21.4±6.2
Ferrosilite (mol%):15.4±2.9
Wollastonite (mol%):1.0±0.3
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):27.4
Type spec location:PSF
Main mass:Harkness Collection
Comments:Work name HC8; 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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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