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Northwest Africa 11329
Basic information Name: Northwest Africa 11329
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11329
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 17.99 kg
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 57 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 15 Aug 2017
Writeup from MB 106:

Northwest Africa 11329 (NWA 11329)

(Northwest Africa)

Purchased: 2014 Feb

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased by Darryl Pitt in February 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) The studied specimen contains some small gabbroic clasts and related angular grains of exsolved pigeonite (pale orange in thin section) and calcic plagioclase (polycrystalline), but is dominated by fine grained, melt-textured matrix containing small vesicles. The matrix consists mainly of lath-like calcic plagioclase and prismatic low-Ca pyroxene (strongly zoned to ferropigeonite rims), together with accessory ilmenite, Ti-chromite, Ni-free metal and minor barite.

Geochemistry: Gabbro clasts: orthopyroxene host (Fs62.3Wo2.2, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs27.4Wo3.8, FeO/MnO = 33), anorthite (An91.1-91.2Or0.3-0.4, N = 2). Melt matrix: low-Ca pyroxene core (Fs44.0Wo3.8, FeO/MnO = 28), ferropigeonite rims (Fs75.4-75.9Wo22.7-16.9, FeO/MnO = 35-38, N = 2).

Classification: Eucrite (melt-breccia).

Specimens: 25.5 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014 Feb
Mass (g):17985
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):62.3; 44.0; 27.4; 75.4-75.9
Wollastonite (mol%):2.2; 3.8; 42.9; 22.7-16.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25.5
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 271; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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