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Northwest Africa 11375
Basic information Name: Northwest Africa 11375
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11375
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 784 g
Meteoritical Bulletin:  MB 106  (2018)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 63 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 15 Aug 2017
Writeup from MB 106:

Northwest Africa 11375 (NWA 11375)

(Northwest Africa)

Purchased: 2017 May

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Eric Twelker in May 2017 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains and rare pyroxene-chromite symplectite clasts in a sparse matrix. The predominant mineral is low-Ca pyroxene (exhibiting undulose extinction) with subordinate olivine (of several different compositions), chromite, metal, fayalite, and minor (<2 vol.%) exsolved pigeonite.

Geochemistry: Olivine (Fa9.7; Fa 17.7; FeO/MnO = 36-40; N = 2), low-Ca pyroxene (Fs30.6Wo6.2, FeO/MnO = 28), orthopyroxene host (Fs45.8Wo1.6, FeO/MnO = 28), clinopyroxene exsolution lamella (Fs16.8Wo44.3, FeO/MnO = 21), orthopyroxene in symplectite with chromite (Fs14.1Wo0.8, FeO/MnO = 23), clinopyroxene in symplectite with chromite (Fs8.1Wo41.6, FeO/MnO = 21), fayalite (Fa85.2, FeO/MnO = 38), plagioclase associated with fayalite (An56.1Or2.0).

Classification: Diogenite (polymict breccia).

Specimens: 21.9 g plus one polished thin section at UWB; remainder with Twelker.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017 May
Mass (g):783.9
Shock stage:low
Weathering grade:low
Fayalite (mol%):9.7; 17.7; 85.2
Ferrosilite (mol%):30.6; 45.8; 16.8
Wollastonite (mol%):6.2; 1.6; 44.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.9
Type spec location:UWB
Main mass:E. Twelker
Comments:Work name ET17-4; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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