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Northwest Africa 13430
Basic information Name: Northwest Africa 13430
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13430
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1276 g
Recommended:  Howardite    [explanation]

This is 1 of 427 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 28 Sep 2020
Writeup from MB 109:

Northwest Africa 13430 (NWA 13430)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Howardite)

History: Purchased by Nicholas Gessler in 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of some diabasic eucrite clasts plus abundant related crystalline debris, together with ~15 vol.% of diogenitic low-Ca pyroxene and accessory silica polymorph, fayalite, hedenbergite, ilmenite and troilite. Diogenitic low-Ca pyroxene grains are relatively ferroan and have rims against the matrix consisting of much more ferroan low-Ca pyroxene or subcalcic augite.

Geochemistry: Diogenitic low-Ca pyroxene (cores Fs31.1-33.1Wo5.6-6.0, FeO/MnO = 27-28, N = 3; rim Fs61.5Wo5.3, FeO/MnO = 34), subcalcic augite (Fs50.3Wo23.9; Fs67.1Wo20.2; FeO/MnO = 31, N = 2; rim on diogenitic pyroxene Fs62.4Wo22.3, FeO/MnO = 32), augite (Fs41.3Wo35.4, FeO/MnO = 30-39), hedenbergite (Fs59.4Wo36.2, FeO/MnO = 39), fayalitic olivine (Fa70.7-85.6, FeO/MnO = 41-44, N = 3), plagioclase (An87.1-92.3Or0.5-0.2, N = 4).

Classification: Howardite.

Specimens: 27.4 g plus one polished thin section at UWB; remainder with Mr. N. Gessler.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):1276
Shock stage:low
Weathering grade:low
Fayalite (mol%):70.7-85.6
Ferrosilite (mol%):31.1-33.1; 50.3; 67.1; 41.3-59.4
Wollastonite (mol%):5.6-6.0; 23.9; 20.2; 35.4-36.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):27.4
Type spec location:UWB
Main mass:N. Gessler
Comments:Work name E; 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)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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